Email APIs
Every email apis we track, compared.
TL;DR: Top pick: Mailgun. 11 APIs compared, 8 with a free tier; cheapest published entry $7 month (MailerSend). Why →
What is an Email API?
An Email API lets developers integrate email apis capabilities over HTTP. The Email APIs below are compared on pricing, compliance, capabilities, and developer experience from structured, cited data.
| # | API | Pricing | Free | Self-serve | SOC 2 | HIPAA | GDPR | Webhooks | Actions |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Mailgun | Hybrid | ✓ | ✓ | Type II | ✓ | ✓ | ✓ | 146 |
| 2 | Mailjet | Hybrid | ✓ | ✓ | Type II | ✓ | ✓ | ✓ | 13 |
| 3 | Amazon Simple Email Service | Usage | ✗ | ✓ | Type II | ✓ | ✓ | ✓ | 168 |
| 4 | Brevo | Hybrid | ✓ | ✓ | · | · | ✓ | ✓ | 104 |
| 5 | SendGrid | Hybrid | ✗ | ✓ | Type II | ✗ | ✓ | ✓ | 28 |
| 6 | MailerSend | Hybrid | ✓ | ✓ | ? | ✗ | ✓ | ✓ | 60 |
| 7 | Postmark | Hybrid | ✓ | ✓ | - | · | ✓ | ✓ | 82 |
| 8 | Resend | Hybrid | ✓ | ✓ | Type II | ✗ | ✓ | ✓ | 29 |
| 9 | SparkPost | Hybrid | ✓ | ✓ | Type II | ✓ | ✓ | ✓ | 45 |
| 10 | Mailchimp Transactional | Hybrid | ✗ | ✓ | ? | ✗ | ✓ | ✓ | 89 |
| 11 | Cloudflare Email Service | Hybrid | ✓ | ✓ | Type II | · | ✓ | ✗ | 5 |
The APIs
#1 Mailgun
84 / 100Mailgun is an email delivery platform aimed at developers, covering transactional and bulk sending, deliverability, email validation, and inbound processing. The REST API supports basic and API-key auth, webhooks, six SDKs, and an official MCP server, with US and EU regions. Pricing is published and self-serve: 100 emails/day free, paid plans from $15/month. It carries SOC 2 Type 2, HIPAA, GDPR, ISO 27001, PCI DSS, and an SLA. Used by Microsoft, Wikipedia, and American Express.
PricingHybrid · from $15 month · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesUsed byMicrosoft, Wikipedia, American Express, Lyft#2 Mailjet
84 / 100Mailjet is an email platform for transactional and marketing email, built for developers and marketers, with EU data residency in Frankfurt and Belgium. The REST API uses basic auth, webhooks, seven SDKs, and an official MCP server. Pricing is published and self-serve: 6,000 emails/month free, paid plans from $9/month. It holds SOC 2 Type 2, HIPAA, GDPR, ISO 27001, PCI DSS, and a published SLA.
PricingHybrid · from $9 month · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoes#3 Amazon Simple Email Service
68 / 100Amazon SES is AWS's cloud email service for high-volume transactional, marketing, and inbound email. Pricing is pay-per-use at $0.10 per 1,000 emails, with 3,000/month free for the first year, and signup is self-serve through AWS. The REST API uses signature auth and webhooks, with seven SDKs and an official MCP server, and it carries SOC 2 Type 2, HIPAA, GDPR, ISO 27001, PCI DSS, and an SLA. Used by Netflix, Duolingo, and Grab.
PricingUsage · from $0.10 1,000 emails · free tier ✗TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001 · PCI DSSDoesUsed byNetflix, Duolingo, Grab, BCAAThe catchCheapest at scale, but bare-bones: new accounts start sandboxed, and deliverability and IP warmup are your job.#4 Brevo
86 / 100Brevo is an all-in-one customer engagement platform spanning transactional and marketing email, SMS, WhatsApp, automation, and CRM. The REST API supports API-key and OAuth2 auth, webhooks, seven SDKs, and an official MCP server. Pricing is published and self-serve with a free tier of 300 emails/day and paid plans from $9/month, and the platform is GDPR and ISO 27001 compliant with a published SLA. Used by eBay, H&M, and Louis Vuitton.
PricingHybrid · from $9 month · free tier ✓TrustGDPR · ISO 27001DoesUsed byeBay, H&M, Louis Vuitton, SodexoAvoid ifYou have strict compliance requirements#5 SendGrid
67 / 100SendGrid, part of Twilio, is a high-scale email platform for transactional and marketing email, with proven deliverability and domain authentication. The REST API supports API-key and basic auth, webhooks, seven SDKs, and an official MCP server, with global and EU regions. Pricing is published and self-serve from about $20/month. It carries SOC 2 Type 2, GDPR, ISO 27001, PCI DSS, and a published SLA. Used by Shopify.
PricingHybrid · from $19.95 month · free tier ✗TrustSOC 2 Type II · GDPR · ISO 27001 · PCI DSSDoesUsed byShopifyAvoid ifYou want to try it free before paying#6 MailerSend
71 / 100MailerSend is a transactional email platform built for developers but accessible to non-technical teams, also covering SMS, inbound routing, and email verification. The REST API uses API-key auth, webhooks, six SDKs, and an official MCP server. Pricing is published and self-serve with 500 emails/month free and paid plans from $7/month. It is GDPR and ISO 27001 compliant with a published SLA.
PricingHybrid · from $7 month · free tier ✓TrustGDPR · ISO 27001DoesAvoid ifYou have strict compliance requirements#7 Postmark
65 / 100Postmark is a transactional email service focused on fast, reliable delivery for notifications, password resets, and receipts. The REST API uses API-key auth, webhooks, seven SDKs, and an official MCP server. Pricing is published and self-serve: 100 emails/month free, paid plans from $15/month. It is GDPR compliant. Used by Asana, IKEA, and UNICEF.
PricingHybrid · from $15 month · free tier ✓TrustGDPRDoesUsed byLiveChat, Asana, IKEA, UNICEFAvoid ifYou have strict compliance requirements#8 Resend
82 / 100Resend is a developer-first REST email API for transactional, marketing, and inbound mail. It ships API-key auth, webhooks, idempotency keys, six SDKs, and an official MCP server, with multi-region sending across the US, EU, Brazil, and Japan. Pricing is published and self-serve, with a free tier of 3,000 emails/month and paid plans from $20. It carries SOC 2 Type 2, GDPR, and a published SLA. Used by Warner Bros, Gumroad, and Replit.
PricingHybrid · from $20 1,000 emails · free tier ✓TrustSOC 2 Type II · GDPRDoesUsed byWarner Bros, Gumroad, Tailwind, Replit#9 SparkPost
63 / 100SparkPost is a developer-friendly email delivery platform for transactional and marketing email, with analytics and critical-alert sending. The REST API supports API-key and basic auth, webhooks, and seven SDKs, across US and EU regions. It is self-serve with a free tier of 500 emails/month and paid plans from $20/month. The platform carries SOC 2 Type 2, HIPAA, GDPR, ISO 27001, and a published SLA. Used by The New York Times, Zillow, and Booking.com.
PricingHybrid · free tier ✓TrustSOC 2 Type II · HIPAA · GDPR · ISO 27001DoesUsed byThe New York Times, Zillow, Adobe, Booking.comAvoid ifYou need transparent pricing up front#10 Mailchimp Transactional
58 / 100Mandrill is Mailchimp's transactional email add-on for targeted, event-driven messages, with inbound processing and transactional SMS. The REST API uses API-key auth, webhooks, and four SDKs. Pricing is published and self-serve, sold in blocks of about $20 with a 500-email free allowance. It is GDPR and ISO 27001 compliant.
PricingHybrid · from $20 block · free tier ✗TrustGDPR · ISO 27001DoesThe catchNot standalone: Mandrill is a paid add-on to a Mailchimp account, with transactional email billed in blocks.#11 Cloudflare Email Service
74 / 100Cloudflare Email Service sends transactional email and routes inbound mail to Workers or addresses, aimed at notifications, auth flows, and custom email handling on Cloudflare's platform. The REST API uses API-key auth with an official MCP server and two SDKs. Pricing is published and self-serve: 3,000 emails/month free, then $0.35 per 1,000. It carries SOC 2 Type 2, GDPR, and ISO 27001. Launched September 2025.
PricingHybrid · from $0.35 1,000 emails · free tier ✓TrustSOC 2 Type II · GDPR · ISO 27001Does