Who is Mailgun best for?

Mailgun is built for Software developers and engineering teams building email into applications, DevOps and platform engineers managing high-volume email infrastructure, Email program managers and deliverability specialists at large senders, Martech platforms and SaaS ISVs embedding email delivery for end-customers. Common use cases include Transactional email delivery for SaaS applications (password resets, order confirmations, 2FA); High-volume marketing and newsletter sending at scale; Email list hygiene and validation before campaign sends.

How is Mailgun priced?

Mailgun Send is offered in four tiers: Free ($0/month, 100 emails/day, 1 custom domain, ticket support); Basic (starting at $15/month for 10,000 emails/month, no daily cap, overages from $1.80/1,000 emails); Foundation (starting at $35/month for 50,000 emails/month, 1 free trial month, 1,000 sending domains, 5-day log retention, overages from $1.30/1,000); and Scale (starting at $90/month for 100,000 emails/month, 1 free trial month, SAML SSO, dedicated IPs, 30-day log retention, phone support, overages from $1.10/1,000). Dedicated IP addresses cost $59/IP/month as an add-on. Email validations are included in the Scale plan (5,000/month) or purchased as an add-on starting at $1.20/100 validations. Mailgun Optimize (deliverability suite) is a separate subscription starting at $49/month (Pilot plan). Enterprise pricing is custom and includes a Rapid Fire Burst Sending SLA. No annual billing discount is currently advertised.

What are the alternatives to Mailgun?

Common Communications APIs alternatives to Mailgun include Twilio, Knock, Vonage, Resend, Novu. See the full comparison hub at /verticals/communications-apis/compare.

What do users praise about Mailgun?

Users frequently praise: Clean, well-documented RESTful API; Easy integration across multiple programming languages; Reliable infrastructure and high uptime; Real-time logs and detailed delivery analytics; Generous free tier for testing; Responsive dedicated account management for enterprise plans; Flexible domain and subaccount management; Inbound email routing flexibility.

What are common complaints about Mailgun?

Frequently cited limitations: Pricing escalates quickly with dedicated IPs and validation add-ons; Account suspensions without advance warning or explanation; Steep learning curve for non-developers; Limited log retention on lower-tier plans; Complex and hard-to-predict cost structure; Poor customer support responsiveness on lower tiers; No built-in visual template editor on lower plans; Reported inbox placement rate decline in recent benchmarks.

When was Mailgun founded and where?

Mailgun was founded in 2010, headquartered in San Antonio, TX, USA (subsidiary of Sinch AB, Stockholm, Sweden) by Ev Kontsevoy, Taylor Wakefield.

Mailgun reports 51-200 employees, 150,000+ customers.

AI visibility report

Mailgun ranks #6 in Communications APIs AI search.

Outside the top three on 20 of the 25 prompts buyers actually ask.

Twilio is cited on 12 of those losses.

25 prompts

6 platforms

Updated Oct 1, 2026 - refreshed weekly

Track Mailgun daily

14-day free trial. No card required. Setup comes pre-filled for Mailgun.

Also benchmarked

Mailgun appears in another vertical

Transactional Email & Developer Email APIs

Track Mailgun across these prompts daily.

Start your 14-day trial

9percent

Presence Rate

Low presence

#6 among 12 vendors · still absent from 90.7% of tracked prompt responses

Top-3 citations across 150 prompt × platform pairs

#6of 12

Peer Ranking

#1#12

Mid-packin Communications APIs

Key Metrics

Presence Rate

9.3%

Share of Voice

8.5%

Avg Position

#32.1

Docs Presence

0.7%

Blog Presence

3.3%

Brand Mentions

0.0%

Platform Breakdown

Grok

32%8/25 prompts

Perplexity

Research dossierCapabilities, use cases, sources, reviews, pricing, and FAQ

Overview

Mailgun is a developer-focused transactional email API platform founded in 2010 by Ev Kontsevoy and Taylor Wakefield. Originally incubated at Y Combinator and later acquired by Rackspace, it spun out independently in 2017, was taken private by Thoma Bravo in 2019, and was acquired by Swedish cloud communications leader Sinch AB in 2021 as part of a ~$1.9 billion deal for parent company Pathwire. Operating under the Sinch Email umbrella alongside Mailjet and Email on Acid, Mailgun serves over 150,000 businesses and claims to send more than 600 billion emails annually. The platform offers four core product pillars — Send, Optimize, Validate, and Inspect — covering email delivery, deliverability management, list hygiene, and email testing, all accessible via RESTful API or SMTP relay with SDKs for six programming languages.

AI visibility report

Mailgun ranks #6 in Communications APIs AI search.

Outside the top three on 20 of the 25 prompts buyers actually ask.

Twilio is cited on 12 of those losses.

25 prompts

6 platforms

Updated Oct 1, 2026 - refreshed weekly

Track Mailgun daily

14-day free trial. No card required. Setup comes pre-filled for Mailgun.

Also benchmarked

Mailgun appears in another vertical

Transactional Email & Developer Email APIs

Track Mailgun across these prompts daily.

Start your 14-day trial

9percent

Presence Rate

Low presence

#6 among 12 vendors · still absent from 90.7% of tracked prompt responses

Top-3 citations across 150 prompt × platform pairs

#6of 12

Peer Ranking

#1#12

Mid-packin Communications APIs

Key Metrics

Presence Rate

9.3%

Share of Voice

8.5%

Avg Position

#32.1

Docs Presence

0.7%

Blog Presence

3.3%

Brand Mentions

0.0%

Platform Breakdown

Grok

32%8/25 prompts

Perplexity

Research dossierCapabilities, use cases, sources, reviews, pricing, and FAQ

Overview

Reviews

4.2/5G2·319+4.3/5Capterra·196+

Praised

Clean, well-documented RESTful API
Easy integration across multiple programming languages
Reliable infrastructure and high uptime
Real-time logs and detailed delivery analytics
Generous free tier for testing
Responsive dedicated account management for enterprise plans
Flexible domain and subaccount management
Inbound email routing flexibility

Criticized

Mailgun holds a 4.2/5 on G2 (319 reviews) and 4.3/5 on Capterra (approximately 196 reviews). Users broadly praise its clean RESTful API, comprehensive documentation, reliable infrastructure, real-time logging, and strong developer experience. The platform is frequently cited for ease of integration across multiple languages. Criticisms center on pricing that escalates quickly at volume (particularly dedicated IPs and add-on validations), a learning curve for non-developers, and a pattern of account suspensions without clear communication. One third-party benchmark (GlockApps, cited by prospeo.io) reported a significant inbox placement rate decline of approximately 27.75% between Q1 2024 and Q1 2025, which some reviewers corroborate with deliverability complaints, though Mailgun disputes this framing.

Prompt	Google AI Mode	Perplexity	Gemini Search	Bing Copilot	ChatGPT	Grok
Capability2/5 cited (40%)
What transactional email APIs handle very high-volume bulk sends alongside triggered one-to-one emails without separate infrastructure?	A competitor was cited	Your brand was cited	A competitor was cited	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	Your brand and a competitor were cited

#	Brand	PresencePres.	Share of VoiceSoV	DocsDocs	BlogBlog	MentionsMent.	Avg PosPos
1	Twilio	34.7%	27.9%	24.7%	0.0%	60.0%	#25.1
2	Knock	18.7%	14.1%	6.7%	10.7%	29.3%	#25.3
3	Vonage	14.0%	11.4%	5.3%	0.7%	28.7%	#23.9
4	Resend	11.3%	5.6%	0.7%	8.7%	18.7%	#16.3
5	Novu	10.7%	10.0%	4.7%	0.0%	26.7%	#47.5
6	Mailgun	9.3%	8.5%	0.7%	3.3%	0.0%	#32.1
7	Postmark	8.0%	8.7%	2.0%	3.3%	21.3%	#31.1
8	Sinch	6.0%	4.1%	1.3%	1.3%	0.0%	#17.6
9	Plivo	4.7%	5.1%	2.7%	2.7%	18.0%	#49.0
10	Stream	3.3%	3.6%	0.0%	2.0%	13.3%	#37.1
11	Bird	2.0%	0.7%	0.0%	0.0%	0.0%	#6.0
12	Nylas	0.7%	0.2%	0.0%	0.0%	0.7%	#4.0

Developer Experience0/5 cited (0%)
Which communications API platforms are least opinionated about the user data model and easiest to integrate with an existing user table?	A competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited

Integrations & Ecosystem2/5 cited (40%)
Which communications API platforms have native workplace chat notification channel support for internal alerting alongside customer-facing messages?	A competitor was cited	A competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited

Performance & Reliability2/5 cited (40%)
Which SMS API providers handle carrier routing and failover best for high delivery rates across different countries?	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited

Mailgun ranks #6 in Communications APIs AI search.

Key Metrics

Platform Breakdown

Overview

Mailgun ranks #6 in Communications APIs AI search.

Key Metrics

Platform Breakdown

Overview

Prompts where competitors are visible and Mailgun is not.

Where Mailgun is winning1

Where Mailgun is losing5

Key Facts

Key Capabilities10

Key Use Cases7

Mailgun customer outcomes

Recent Trend

How AI describes Mailgun3

Most cited sources8

Alternatives in Communications APIs6

Reviews

Pricing

Limitations

Topic Coverage

Prompt-Level Results

Vertical Ranking

Turn this into your team dashboard

Frequently asked questions

Setup & First Run2/5 cited (40%)
Which SMS API providers make it easiest to migrate sending infrastructure without breaking existing 2FA flows for users?	Neither your brand nor a competitor was cited	A competitor was cited	Neither your brand nor a competitor was cited	Neither your brand nor a competitor was cited	A competitor was cited	A competitor was cited

Mailgun ranks #6 in Communications APIs AI search.

Key Metrics

Platform Breakdown

Overview

Mailgun ranks #6 in Communications APIs AI search.

Key Metrics

Platform Breakdown

Overview

Prompts where competitors are visible and Mailgun is not.

Where Mailgun is winning1

Where Mailgun is losing5

Key Facts

Key Capabilities10

Key Use Cases7

Mailgun customer outcomes

Recent Trend

How AI describes Mailgun3

Most cited sources8

Alternatives in Communications APIs6

Reviews

Pricing

Limitations

Topic Coverage

Prompt-Level Results

Vertical Ranking

Turn this into your team dashboard

Frequently asked questions

What does Mailgun do?

Who is Mailgun best for?

How is Mailgun priced?

What are the alternatives to Mailgun?

What do users praise about Mailgun?

What are common complaints about Mailgun?

When was Mailgun founded and where?

How big is Mailgun?