# Knock AI visibility in Communications APIs

Canonical: https://devtune.ai/verticals/communications-apis/knock

[Website](https://knock.app/)

Updated: 2026-10-16T02:11:03.053636+00:00
Prompts: 25
Runs: 6


## Platforms

- google-ai-mode
- google-ai
- chatgpt-search
- perplexity
- bing-copilot-search
- xai-search

Rank: 2
Total brands: 12
Measured responses: 150
Presence percent: 23.333333333333332
Share of voice percent: 16.856060606060606
Average position: 18.60674157303371
Docs presence percent: 12
Blog presence percent: 12.666666666666668
Brand mention percent: 32.666666666666664


## Profile

Overview: Knock (knock.app) is a developer-first notification infrastructure and customer engagement platform founded in 2021 and headquartered in Brooklyn, New York. Built by Sam Seely and Chris Bell—previously engineering and product leaders at Frame.io—Knock provides a unified API, workflow engine, and UI component library that enables SaaS product teams to orchestrate cross-channel notifications across email, SMS, push, in-app feeds, and chat without building and maintaining custom infrastructure. Knock delivers hundreds of millions of messages per month and is used in production by companies including Vercel, Amplitude, Webflow, Medium, Discogs, and Clay. The platform is SOC 2, HIPAA, GDPR, and CCPA compliant with a stated 99.99% uptime target.
Product summary: Knock is notification infrastructure and customer engagement software that gives engineering and product teams a single platform to design, orchestrate, and deliver cross-channel messaging. Its core primitives include a visual workflow editor with batch, delay, branch, throttle, and AI agent step functions; an in-app UI component library (feeds, toasts, guides); a broadcast tool for one-time campaigns; a preference and unsubscribe management system; and a developer toolkit (CLI, CI/CD integration, MCP server, SDKs in 8 languages). Knock acts as an orchestration layer on top of downstream email, SMS, push, and chat providers rather than replacing them.


### Key capabilities

- Multi-channel workflow engine (email, SMS, in-app, push, chat) with visual editor
- Batch, delay, throttle, and branch logic functions within workflows
- Pre-built and bring-your-own in-app notification feed, inbox, and toast components
- Broadcast messaging for one-time campaigns to custom audiences
- User preference management and commercial unsubscribe controls
- AI-native workflow building via Knock Agents, MCP server, and agent toolkit
- Infrastructure-as-code: CLI, version control, environments, and CI/CD integration
- Cross-channel observability, analytics, and Datadog/warehouse streaming
- Multi-tenancy with per-tenant branding, preferences, and translations (i18n)
- SDKs in 8 languages plus a Management API for programmatic dashboard control



### Target users

- Software engineers and backend developers building product notification systems
- Engineering leads and VPs of Engineering at SaaS companies
- Product managers at product-led growth companies
- Marketing operations teams managing lifecycle and campaign messaging
- Growth and retention teams at B2B and B2C SaaS products
- AI agent and LLM application developers needing human-in-the-loop messaging



### Key use cases

- Product notification systems (user invites, activity alerts, access requests)
- Transactional and lifecycle messaging across email, push, and SMS
- In-app notification feeds, inboxes, and real-time toasts
- Marketing and feature announcement broadcasts
- AI agent human-in-the-loop messaging workflows
- B2B SaaS multi-tenant notification infrastructure
- Alerting and monitoring notification pipelines
- Replacing homegrown, hard-to-maintain in-house notification systems

Integrations ecosystem: Knock connects to 60+ channels, sources, and tools. Email providers: SendGrid, Mailgun, Postmark, Amazon SES, MailerSend, Mailjet, Mailtrap, SparkPost, Resend. SMS: Twilio, Sinch, Vonage, Plivo, Telnyx, MessageBird. Mobile push: Firebase (FCM), Expo, APNs. Chat: Slack, Microsoft Teams, Discord, WhatsApp. Customer data / CDPs: Twilio Segment, RudderStack, Freshpaint. Reverse ETL: Hightouch, Census, Polytomic. Observability: Datadog, New Relic. SDKs available in Node, Python, Ruby, Go, Java, .NET, Elixir, and PHP. Developer tooling includes a CLI, Management API (mAPI), CI/CD pipeline integration, MCP server for LLM/AI agent access, and a Postman collection.
Pricing summary: Knock offers three tiers. Developer (free): up to 10,000 messages/month, 500 guide active users, 500 AI agent credits, unlimited workflows and channels, 99.9% uptime SLA. Starter ($250/month): 50,000 messages included ($0.005 per additional), 2,500 guide active users ($0.05 per additional), 2,000 AI agent credits, removes Knock branding. Enterprise (contact sales): flexible volume-based or monthly notified-user pricing, annual commit discounts, dedicated infrastructure, HIPAA BAA, SAML 2.0 SSO, SCIM directory sync, Datadog/warehouse analytics streaming, 90-day log retention, and enterprise SLAs. Knock does not charge for workflow triggers or recipients—only for messages successfully sent.
Review summary: Knock holds a 4.6/5 rating across 144 G2 reviews (81% five-star), praised primarily for its clean and well-documented APIs, fast time-to-implement, powerful visual workflow builder, and highly responsive customer support. Product Hunt reviewers highlight reliability and breadth of features including templating, scheduling, in-app feeds, and out-of-the-box integrations. Common criticisms include missing features flagged by some reviewers, limited campaign performance analytics compared to full marketing platforms, and some SDK quality gaps (notably the Go client). Overall sentiment is strongly positive, with users frequently citing that Knock replaced weeks of custom engineering work.
Competitive positioning: Knock positions itself as developer-first notification infrastructure purpose-built for product-led SaaS teams, sitting between raw CPaaS providers (Twilio, Sinch) and marketer-oriented engagement platforms (Braze, Iterable). Its differentiator is a unified workflow engine that abstracts multi-channel orchestration—batching, throttling, preferences, in-app feeds—into a single API layer, enabling engineering teams to treat notifications as production infrastructure (with CI/CD, version control, and CLI) while also giving non-engineers a no-code dashboard to manage templates and campaigns. Knock increasingly competes upmarket against traditional customer engagement platforms on developer experience and AI-native tooling.
Limitations: G2 reviewers flag missing features (cited by 19 reviewers), limited template options (8 reviews), and difficult learning curve for advanced use cases (7 reviews). Some users note limited campaign performance analytics compared to dedicated marketing platforms. One technical review cited a sub-par Golang SDK with limited strong typing support and no clean git-based payload spec management. Knock does not manage billing for downstream providers (e.g., Twilio, Postmark), so customers pay Knock fees plus downstream channel costs. The free Developer plan caps at 10,000 messages/month.


### Source urls

- https://knock.app/
- https://knock.app/pricing
- https://knock.app/about
- https://knock.app/blog/announcing-our-series-a
- https://www.businesswire.com/news/home/20240215971006/en/Notification-Infrastructure-Provider-Knock-Announces-%2412-Million-Series-A-Led-by-Craft-Ventures
- https://medium.com/craft-ventures/why-we-invested-in-knock-e2d56e149b6f
- https://www.g2.com/products/knock-knock/reviews
- https://knock.app/customers/vercel
- https://knock.app/customers/medium
- https://docs.knock.app/
- https://github.com/knocklabs
- https://www.alleywatch.com/2024/03/knock-app-api-based-notification-infrastructure-platform-sam-seely/

Reviewed at: 2026-04-28T23:24:23.625+00:00


### Customer outcomes

| Customer | Summary | Metric |
| --- | --- | --- |
| Vercel | Vercel built a working in-app feed demo using Knock in less than an hour, shipped multi-channel notifications with WebSocket-powered real-time feeds and React hooks, and enabled customer success engineers and product managers to troubleshoot and update notification templates with | In-app feed prototype in <1 hour |
| Medium | Medium shifted notification creation from an engineering bottleneck to a self-serve function: non-engineers can now build, test, and ship an email in approximately three days, and the marketing team ran the Black Friday push notification campaign mostly hands-off for engineering. | ~3 days for non-engineer to build and ship an email end-to-end |
| Clay | Clay unblocked its marketing and education teams to launch in-app notifications in days rather than a month or more by installing the React SDK, customizing CSS, and going live without deep engineering investment. | Days to ship vs. 1+ month previously |
| Amplitude | Amplitude's engineering team reported that complex notification flows—including batching, delays, and multi-channel delivery—that previously took weeks to implement now take minutes using Knock's workflow engine and dashboard. | Weeks of work reduced to minutes |



### Reviews breakdown

| Platform | Score | Score max | Review count | Url |
| --- | --- | --- | --- | --- |
| G2 | 4.6 | 5 | 144 | https://www.g2.com/products/knock-knock/reviews |



### Review themes



#### Praised

- Clean, well-documented APIs
- Fast time-to-implement (hours not weeks)
- Visual workflow builder with batching and delay logic
- Responsive customer support and Slack support channel
- Empowers non-technical team members to manage notifications
- Reliable, production-grade infrastructure
- Rich in-app notification feed and UI components
- Centralizes multi-channel notifications in one platform



#### Criticized

- Missing features flagged by multiple reviewers
- Limited template creation options
- Weak campaign performance analytics
- Golang SDK quality and typing issues
- Learning curve for advanced workflow configurations
- Notification delivery issues noted by some users
- No declarative workflow definition (e.g., Terraform provider)
- Customers still pay separately for downstream channel providers




### Company facts

Founded year: 2021
Hq: Brooklyn, New York, US


#### Founders

- Sam Seely
- Chris Bell

Employees range: 11-50
Total funding: $18M
Valuation: Not available
Arr: Not available
Customer count: Not available
Status: Private


Readiness: Not available


## Ranking

| Display name | Pair count | Total pairs | Presence percent | Avg position |
| --- | --- | --- | --- | --- |
| Twilio | 47 | 150 | 31.333333333333336 | 24.53174603174603 |
| Knock | 35 | 150 | 23.333333333333332 | 18.60674157303371 |
| Vonage | 23 | 150 | 15.333333333333332 | 22.677966101694917 |
| Novu | 20 | 150 | 13.333333333333334 | 34.63934426229508 |
| Resend | 17 | 150 | 11.333333333333332 | 16.666666666666668 |
| Postmark | 14 | 150 | 9.333333333333334 | 26.90909090909091 |
| Mailgun | 13 | 150 | 8.666666666666668 | 32.371428571428574 |
| Sinch | 10 | 150 | 6.666666666666667 | 13.368421052631579 |
| Stream | 9 | 150 | 6 | 28.6 |
| Plivo | 8 | 150 | 5.333333333333334 | 45.26086956521739 |
| Bird | 5 | 150 | 3.3333333333333335 | 6.875 |
| Nylas | 1 | 150 | 0.6666666666666667 | 3 |



## Platform breakdown

| Platform | Prompt count | Presence rate |
| --- | --- | --- |
| google-ai-mode | 4 | 16 |
| google-ai | 5 | 20 |
| chatgpt-search | 7 | 28.000000000000004 |
| perplexity | 4 | 16 |
| bing-copilot-search | 0 | 0 |
| xai-search | 15 | 60 |



## Strengths

| Prompt text | Platform count | Avg position |
| --- | --- | --- |
| Which communications API platforms are least opinionated about the user data model and easiest to integrate with an existing user table? | 1 | 1 |
| Which notification infrastructure platforms integrate with CDPs to drive personalized cross-channel messaging automatically? | 1 | 3 |
| Which communications API providers give the best visibility into delivery failures, retries, and notification debugging? | 2 | 3.5 |
| Which notification infrastructure platforms handle user preference management best so recipients can control what they receive and on which channel? | 4 | 5.5 |
| I'm evaluating multi-channel notification platforms to architect from the start — which ones scale well as the product grows? | 5 | 6.2 |



## Gaps

| Prompt text | Competitor presence count |
| --- | --- |
| What's the fastest transactional email API to set up for a new SaaS app so that signup and password reset emails reliably hit the inbox? | 4 |
| Which communications APIs integrate best with CRMs and marketing automation tools so sales teams can see notification history alongside customer records? | 4 |
| Which voice API platforms handle IVR flows and programmable call routing well for building a basic customer support phone system? | 4 |
| Which SMS API providers make it easiest to migrate sending infrastructure without breaking existing 2FA flows for users? | 3 |
| Which communications API providers queue and retry in-flight notifications during outages rather than dropping messages? | 3 |



## Topic scores

| Topic name | Prompt count | Cited prompt count |
| --- | --- | --- |
| Capability | 5 | 2 |
| Developer Experience | 5 | 4 |
| Integrations & Ecosystem | 5 | 3 |
| Performance & Reliability | 5 | 3 |
| Setup & First Run | 5 | 4 |



## Prompt results

- Prompt text: Which SMS API providers make it easiest to migrate sending infrastructure without breaking existing 2FA flows for users?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 39



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Sinch | 4 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Bird | 2 |
| Twilio | 3 |
| Vonage | 6 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Bird | 1 |
| Twilio | 2 |
| Vonage | 3 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Twilio | 3 |
| Knock | 39 |
| Plivo | 40 |


- Prompt text: Which notification infrastructure platforms support both push and email channels from a single API for mobile apps?


#### Brand position by platform

Google-ai-mode: 1
Google-ai: 2
Chatgpt-search: 2
Perplexity: 3
Bing-copilot-search: Not available
Xai-search: 10



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Nylas | 3 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Knock | 2 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 2 |
| Novu | 3 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Knock | 3 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Resend | 1 |
| Novu | 6 |
| Knock | 10 |


- Prompt text: What are the best tools for testing SMS and email sending locally without hitting real phone numbers or sending actual messages?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode





##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 4 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 4 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Twilio | 4 |


- Prompt text: Which communications API providers queue and retry in-flight notifications during outages rather than dropping messages?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 68



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Twilio | 3 |
| Vonage | 4 |
| Plivo | 5 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 4 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 4 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Twilio | 53 |
| Sinch | 59 |
| Knock | 68 |


- Prompt text: Which SMS API providers handle carrier routing and failover best for high delivery rates across different countries?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: 2
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 7



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Plivo | 1 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Knock | 2 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Sinch | 2 |
| Vonage | 3 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Sinch | 1 |
| Plivo | 5 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Knock | 7 |
| Twilio | 17 |
| Plivo | 29 |
| Sinch | 35 |


- Prompt text: I'm evaluating multi-channel notification platforms to architect from the start — which ones scale well as the product grows?


#### Brand position by platform

Google-ai-mode: 2
Google-ai: 1
Chatgpt-search: 1
Perplexity: 1
Bing-copilot-search: Not available
Xai-search: 26



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Knock | 2 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Knock | 1 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Novu | 3 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Novu | 5 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Knock | 26 |
| Resend | 34 |
| Novu | 38 |


- Prompt text: Which communications API platforms are least opinionated about the user data model and easiest to integrate with an existing user table?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: 1
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode





##### Google-ai

| Display name | Position |
| --- | --- |
| Novu | 3 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Twilio | 5 |
| Resend | 8 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Stream | 2 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Stream | 26 |
| Twilio | 86 |


- Prompt text: Which email API providers make switching SPF, DKIM, and DMARC records easiest without disrupting deliverability?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Postmark | 1 |
| Resend | 4 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Postmark | 2 |
| Resend | 4 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Mailgun | 17 |
| Postmark | 23 |
| Twilio | 43 |


- Prompt text: Which multi-channel notification platforms support fallback logic — like falling back to SMS if a push notification isn't opened within an hour?


#### Brand position by platform

Google-ai-mode: 3
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 7



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Knock | 3 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Novu | 5 |
| Sinch | 6 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 4 |



##### Perplexity





##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Vonage | 5 |
| Knock | 7 |
| Resend | 13 |


- Prompt text: What's the fastest transactional email API to set up for a new SaaS app so that signup and password reset emails reliably hit the inbox?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 4



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Postmark | 2 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Resend | 1 |
| Postmark | 3 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Resend | 1 |
| Postmark | 2 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Postmark | 2 |
| Knock | 4 |
| Mailgun | 9 |
| Resend | 44 |


- Prompt text: Which communications APIs support building real-time in-app chat with message threading, reactions, and file attachments, not just simple notifications?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Stream | 2 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Stream | 7 |



##### Perplexity





##### Bing-copilot-search

| Display name | Position |
| --- | --- |
| Stream | 1 |



##### Xai-search

| Display name | Position |
| --- | --- |
| Stream | 13 |
| Vonage | 20 |


- Prompt text: Which unified communications APIs handle both programmatic email sending and visual template editing for non-technical teams?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Twilio | 6 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Mailgun | 4 |
| Twilio | 8 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Bing-copilot-search

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Xai-search

| Display name | Position |
| --- | --- |
| Twilio | 2 |
| Vonage | 15 |
| Mailgun | 26 |
| Novu | 75 |


- Prompt text: Which communications API platforms are designed with portability in mind — making it easy to swap providers for routing and template logic without a full rewrite?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: 5
Perplexity: 1
Bing-copilot-search: Not available
Xai-search: 65



#### Platform rows



##### Google-ai-mode





##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Novu | 2 |
| Knock | 5 |
| Bird | 7 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Novu | 5 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Plivo | 3 |
| Twilio | 15 |
| Vonage | 22 |
| Resend | 43 |
| Novu | 64 |
| Knock | 65 |


- Prompt text: What are the best tools for piping delivery and open events from a communications API back into a product analytics pipeline via webhooks?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode





##### Google-ai





##### Chatgpt-search





##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Mailgun | 5 |
| Twilio | 61 |


- Prompt text: Which communications API providers give the best visibility into delivery failures, retries, and notification debugging?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: 3
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 4



#### Platform rows



##### Google-ai-mode





##### Google-ai

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Knock | 3 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Resend | 4 |
| Vonage | 6 |
| Postmark | 8 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 5 |
| Bird | 6 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Knock | 4 |
| Plivo | 8 |
| Resend | 11 |
| Twilio | 15 |
| Postmark | 45 |
| Novu | 56 |
| Vonage | 78 |


- Prompt text: Which notification infrastructure platforms handle user preference management best so recipients can control what they receive and on which channel?


#### Brand position by platform

Google-ai-mode: 3
Google-ai: Not available
Chatgpt-search: 2
Perplexity: 4
Bing-copilot-search: Not available
Xai-search: 13



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Knock | 3 |
| Novu | 12 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 2 |
| Novu | 4 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Knock | 4 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Resend | 11 |
| Knock | 13 |
| Novu | 16 |


- Prompt text: Which communications APIs integrate best with CRMs and marketing automation tools so sales teams can see notification history alongside customer records?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Vonage | 1 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Vonage | 1 |
| Sinch | 5 |
| Twilio | 26 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 2 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Twilio | 16 |
| Vonage | 26 |
| Postmark | 47 |
| Mailgun | 48 |


- Prompt text: Which transactional email API providers deliver the best inbox placement rates and give you the most control over deliverability factors?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 13



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Mailgun | 2 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Twilio | 6 |



##### Chatgpt-search





##### Perplexity

| Display name | Position |
| --- | --- |
| Mailgun | 1 |
| Twilio | 5 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Resend | 1 |
| Postmark | 3 |
| Knock | 13 |
| Mailgun | 16 |


- Prompt text: Which notification infrastructure platforms integrate with CDPs to drive personalized cross-channel messaging automatically?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 3



#### Platform rows



##### Google-ai-mode





##### Google-ai

| Display name | Position |
| --- | --- |
| Novu | 1 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 7 |



##### Perplexity





##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Knock | 3 |
| Bird | 13 |
| Twilio | 25 |
| Novu | 71 |
| Resend | 73 |


- Prompt text: What transactional email APIs handle very high-volume bulk sends alongside triggered one-to-one emails without separate infrastructure?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 18



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Mailgun | 2 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 4 |
| Mailgun | 6 |
| Postmark | 8 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Postmark | 3 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Postmark | 1 |
| Knock | 18 |
| Mailgun | 21 |
| Twilio | 51 |


- Prompt text: Which real-time in-app messaging APIs maintain low latency at 10,000 concurrent connected users?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Stream | 1 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Stream | 1 |



##### Chatgpt-search





##### Perplexity





##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Stream | 5 |


- Prompt text: Which voice API platforms handle IVR flows and programmable call routing well for building a basic customer support phone system?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode





##### Google-ai

| Display name | Position |
| --- | --- |
| Sinch | 2 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 5 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |
| Vonage | 2 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Plivo | 2 |
| Vonage | 23 |
| Twilio | 32 |


- Prompt text: Which communications API platforms give product teams control over notification templates without engineering involvement day-to-day?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: 4
Chatgpt-search: 1
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 17



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Resend | 5 |



##### Google-ai

| Display name | Position |
| --- | --- |
| Knock | 4 |



##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 1 |
| Novu | 4 |
| Twilio | 10 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Twilio | 1 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Resend | 2 |
| Knock | 17 |
| Novu | 35 |


- Prompt text: What tools help load test a notification system to ensure it handles a burst of 1 million emails without queue buildup?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: Not available
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: Not available



#### Platform rows



##### Google-ai-mode





##### Google-ai





##### Chatgpt-search





##### Perplexity





##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Mailgun | 24 |


- Prompt text: Which communications API platforms have native workplace chat notification channel support for internal alerting alongside customer-facing messages?


#### Brand position by platform

Google-ai-mode: Not available
Google-ai: Not available
Chatgpt-search: 3
Perplexity: Not available
Bing-copilot-search: Not available
Xai-search: 13



#### Platform rows



##### Google-ai-mode

| Display name | Position |
| --- | --- |
| Sinch | 2 |
| Vonage | 4 |



##### Google-ai





##### Chatgpt-search

| Display name | Position |
| --- | --- |
| Knock | 3 |
| Novu | 6 |



##### Perplexity

| Display name | Position |
| --- | --- |
| Sinch | 2 |
| Twilio | 4 |
| Vonage | 7 |



##### Bing-copilot-search





##### Xai-search

| Display name | Position |
| --- | --- |
| Vonage | 2 |
| Twilio | 8 |
| Knock | 13 |





## Top sources

| Url | Title | Domain | Logo url | Source vertical | Content type | Citation count | Last30d count |
| --- | --- | --- | --- | --- | --- | --- | --- |
| https://knock.app/manuals/notification-infrastructure/introduction-to-notification-infrastructure | Introduction to notification infrastructure \| Knock | knock.app | https://izgwnlozsmjmqjsnddmg.supabase.co/storage/v1/object/public/domain-logos/9dbab6f8-54b2-49a0-8181-89a0ed130318/ffe488f5-bd50-4db5-9f9a-dc7b4956589f/6ed0916d7e5f027381313d446f37f9a9e84ad142.png | commercial | documentation | 16 | 16 |
| https://knock.app/blog/the-top-notification-infrastructure-platforms-for-developers | The 5 best notification infrastructure platforms for developers in 2026 \| Knock | knock.app | https://izgwnlozsmjmqjsnddmg.supabase.co/storage/v1/object/public/domain-logos/9dbab6f8-54b2-49a0-8181-89a0ed130318/ffe488f5-bd50-4db5-9f9a-dc7b4956589f/6ed0916d7e5f027381313d446f37f9a9e84ad142.png | commercial | blog_post | 14 | 14 |
| https://knock.app/blog/the-top-sms-providers-for-developers | Top 11 SMS providers for developers in 2026 \| Knock | knock.app | https://izgwnlozsmjmqjsnddmg.supabase.co/storage/v1/object/public/domain-logos/9dbab6f8-54b2-49a0-8181-89a0ed130318/ffe488f5-bd50-4db5-9f9a-dc7b4956589f/6ed0916d7e5f027381313d446f37f9a9e84ad142.png | commercial | comparison | 12 | 12 |
| https://docs.knock.app/preferences/overview | Preferences overview | docs.knock.app | Not available | commercial | documentation | 10 | 10 |
| https://docs.knock.app/getting-started/what-is-knock | What is Knock? \| Knock Docs | docs.knock.app | Not available | commercial | documentation | 10 | 10 |
| https://knock.app/ | Knock \| Customer engagement infrastructure | knock.app | https://izgwnlozsmjmqjsnddmg.supabase.co/storage/v1/object/public/domain-logos/9dbab6f8-54b2-49a0-8181-89a0ed130318/ffe488f5-bd50-4db5-9f9a-dc7b4956589f/6ed0916d7e5f027381313d446f37f9a9e84ad142.png | commercial | blog_post | 7 | 7 |
| https://docs.knock.app/concepts/preferences | Preferences \| Knock Docs | docs.knock.app | Not available | commercial | documentation | 5 | 5 |
| https://docs.knock.app/integrations/overview | Integrations overview \| Knock Docs | docs.knock.app | Not available | commercial | documentation | 5 | 5 |



## Response excerpts

| Prompt text | Platform | Excerpt |
| --- | --- | --- |
| Which notification infrastructure platforms support both push and email channels from a single API for mobile apps? | google-ai | Knock App The leading platforms supporting both mobile push and email from a single API include: ### 1\. |
| Which communications API platforms have native workplace chat notification channel support for internal alerting alongside customer-facing messages? | google-ai | Knock: A specialized notification infrastructure API that explicitly treats workplace chat apps (Slack, Microsoft Teams, Discord) as first-class notification channels alongside customer channels (SMS, push, email, WhatsApp). |
| Which SMS API providers handle carrier routing and failover best for high delivery rates across different countries? | google-ai | Knock App \+ 1 * Infobip: Exceptional global reach with massive direct carrier relationships, particularly strong in Europe, Asia, Latin America, and the Middle East. |



## Competitor excerpts

| Platform | Competitor name | Excerpt |
| --- | --- | --- |
| google-ai-mode | Postmark | Postmark and Resend are the fastest transactional email APIs to set up for a new SaaS app, offering sub-10-minute integration and exceptional inbox placement for critical triggers like signups and password resets. |
| chatgpt-search | Resend | For a new SaaS app, I’d choose Resend if you want the fastest developer setup, with Postmark as a strong alternative if your top priority is dependable delivery of signup verification and password-reset emails. |
| chatgpt-search | Postmark | For a new SaaS app, I’d choose Resend if you want the fastest developer setup, with Postmark as a strong alternative if your top priority is dependable delivery of signup verification and password-reset emails. |
| perplexity | Resend | For the fastest straightforward setup, I’d choose Resend. It has a developer-focused API, and its domain setup is simple: add a sending domain, publish the generated DNS records, and verify. |
| perplexity | Postmark | If inbox reliability is your top priority, consider Postmark. It’s focused on transactional mail, supports separate transactional and broadcast streams, and handles infrastructure details like IP reputation and feedback loops [2][3]. |
| google-ai-mode | Twilio | Twilio (Best Overall for Customization & Ecosystem) Twilio remains the gold standard because its programmable APIs and ecosystem make logging history into a CRM seamless via webhooks, Serverless functions, or pre-packaged integrations. |
| google-ai | Vonage | Vonage (formerly Nexmo) * Why it integrates best: Vonage provides powerful messaging and voice APIs alongside explicit CRM & Marketing Automation Connectors . They offer out-of-the-box integrations tailored for enterprise ecosystems like Sale... |
| chatgpt-search | Vonage | ...ration If your goal is to let sales reps see SMS, email, WhatsApp, voice calls, and notification delivery history directly alongside customer records, I'd shortlist Twilio, Vonage, Sinch, and the communication APIs built into your CRM ecosystem. |
| perplexity | Twilio | For notification history visible on customer records, Twilio looks like the strongest fit in the available results. |
| perplexity | Vonage | [1] Vonage is a good Salesforce-focused alternative, particularly if your team wants SMS, RCS, and WhatsApp messaging in Salesforce and event tracking in Salesforce Marketing Cloud. |
| google-ai | Sinch | Sinch Sinch * Why it's great: Similar to Twilio, Sinch offers robust Voice APIs that handle call routing, custom SVAML scripts, text-to-speech greetings, and direct PSTN-to-app bridging. |
| chatgpt-search | Twilio | For a basic customer support phone system, I’d shortlist Twilio, Telnyx, and Vonage. |



## Trend

Visibility delta: -6
Avg position delta: 1.7187822497420022
Citation count delta: 13