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Use cases · Email APIs

Best Email APIs for Receiving & Parsing Inbound Email

APIs that can receive inbound email and hand it to your app as structured data - for support inboxes, reply handling, and agent workflows.

Required capability: Inbound parsing.

Our pick: Mailgun

Mailgun 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.

Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt).

Mailgun profile →

Best for…

Best overall
Mailgun - our default pick: strongest across pricing, trust and breadth
Best free pick
Mailgun - free tier: $0/mo Free plan: 100 emails per day, 1 custom sending domain, ticket support, RESTful ema…
Best for enterprise
Mailgun - for regulated or large teams: SOC 2 Type II, HIPAA, published SLA
Cheapest to start
MailerSend - from $7 month to start; compare on your real usage, not the entry price
Best for agents
Mailgun - easiest to wire up programmatically: MCP server
Broadest surface
Amazon Simple Email Service - 168 documented actions; breadth isn't quality, but it's the most to build on

Ranked (11)

  • #1 Mailgun

    84 / 100
    • Best overall
    • Best free pick
    • Best for enterprise
    • Best for agents

    Mailgun 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 DSS
    Does
    • Transactional send
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Email validation
    • Analytics
    Used byMicrosoft, Wikipedia, American Express, Lyft

    Mailgun profile →

  • #2 Mailjet

    84 / 100

    Mailjet 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 DSS
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Analytics

    Mailjet profile →

  • #3 Amazon Simple Email Service

    68 / 100
    • Broadest surface

    Amazon 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 DSS
    Does
    • Transactional send
    • Inbound parsing
    • Templates
    • Batch send
    • SMTP relay
    • Dedicated IP
    • Analytics
    Used byNetflix, Duolingo, Grab, BCAA
    The catchCheapest at scale, but bare-bones: new accounts start sandboxed, and deliverability and IP warmup are your job.

    Amazon Simple Email Service profile →

  • #4 Brevo

    86 / 100

    Brevo 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 27001
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Analytics
    Used byeBay, H&M, Louis Vuitton, Sodexo
    Avoid ifYou have strict compliance requirements

    Brevo profile →

  • #5 SendGrid

    67 / 100

    SendGrid, 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 DSS
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Email validation
    • Analytics
    Used byShopify
    Avoid ifYou want to try it free before paying

    SendGrid profile →

  • #6 MailerSend

    71 / 100
    • Cheapest to start

    MailerSend 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 27001
    Does
    • Transactional send
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Email validation
    • Analytics
    Avoid ifYou have strict compliance requirements

    MailerSend profile →

  • #7 Postmark

    65 / 100

    Postmark 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 ✓
    TrustGDPR
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • SMTP relay
    • Dedicated IP
    • Analytics
    Used byLiveChat, Asana, IKEA, UNICEF
    Avoid ifYou have strict compliance requirements

    Postmark profile →

  • #8 Resend

    82 / 100

    Resend 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 · GDPR
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Analytics
    Used byWarner Bros, Gumroad, Tailwind, Replit

    Resend profile →

  • #9 SparkPost

    63 / 100

    SparkPost 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 27001
    Does
    • Transactional send
    • Marketing / broadcasts
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Email validation
    • Analytics
    Used byThe New York Times, Zillow, Adobe, Booking.com
    Avoid ifYou need transparent pricing up front

    SparkPost profile →

  • #10 Mailchimp Transactional

    58 / 100

    Mandrill 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 27001
    Does
    • Transactional send
    • Inbound parsing
    • Templates
    • Batch send
    • Scheduled send
    • SMTP relay
    • Dedicated IP
    • Analytics
    The catchNot standalone: Mandrill is a paid add-on to a Mailchimp account, with transactional email billed in blocks.

    Mailchimp Transactional profile →

  • #11 Cloudflare Email Service

    74 / 100

    Cloudflare 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 27001
    Does
    • Transactional send
    • Inbound parsing
    • Analytics

    Cloudflare Email Service profile →

Scope: only APIs with the required capability, picked from published, cited data. The score is one input, not the verdict, and we lead with each one’s trade-off. No reviews yet, no paid placement. See the full Email APIs directory.