Tools / Mailgun / Mailgun vs SendGrid
Email APIs for sending, receiving, and parsing.
Mailgun is a transactional email API service for developers, part of Sinch (the site's logo pairs the two brands). The homepage is organized around four product areas: Send (an email API for sending, with inbound message parsing and connections to CRMs or other data tools), Optimize (a deliverability suite the site describes as combining applications and expertise), Validate (a real-time email validation API plus drag-and-drop list cleaning to remove invalid and high-risk addresses), and Inspect (email preview and quality-assurance tools built on Email On Acid technology, including accessibility checks). The site says Mailgun scales from thousands to millions of emails and cites customer results including 21% fewer bounces, 65% higher open rates, and 100% more clicks. It also references a Forrester study modeling potential improvements for a composite customer, and carries a testimonial from Michael Sacca, VP of Product at Dribbble, on deliverability at volume.
Transactional and marketing email APIs from Twilio.
SendGrid is Twilio's email product, offering an Email API and SMTP service for transactional sending alongside campaign tools for marketers. According to Twilio, the platform delivers more than 200 billion emails per month. SendGrid's site now redirects to Twilio.com, where the same products, documentation, and resources are hosted. Senders can pair the Email API with other Twilio services for verification, alerts, and customer support. The site advertises a free trial with no credit card required and flexible pricing, though specific plan details aren't listed on the homepage.