SendGrid ranks #3 in Transactional Email & Developer Email APIs AI search.

Twilio SendGrid is a cloud-based email delivery platform offering both a developer-grade Email API and a Marketing Campaigns product for non-technical users. Originally founded in 2009 in Denver, Colorado and acquired by Twilio in February 2019 for approximately $3 billion, SendGrid processes over 100 billion emails per month on behalf of more than 80,000 customers globally. Its infrastructure supports SMTP relay, a RESTful API, dynamic templating, and managed deliverability through ISP partnerships, domain authentication, and dedicated IP management. Trusted by large-scale senders including Airbnb, Spotify, Uber, and Shopify, SendGrid is embedded within Twilio's broader CPaaS ecosystem, enabling teams to combine email with SMS, voice, and customer data capabilities on a single platform.

Twilio SendGrid is a cloud-based email delivery platform offering a developer-first REST API and SMTP service for transactional email, alongside a Marketing Campaigns product for non-technical marketers. It abstracts infrastructure complexity—including deliverability optimization, sender reputation monitoring, ISP outreach, and real-time analytics—allowing engineering and marketing teams to focus on their core business rather than email operations.