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Head-to-head · Email APIs

Mailgun vs OpenSend

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score Mailgun #1 in Email APIs 9.7/10 Free plan · 30-day trial Free planFree trial✓ 5 of 5 features Visit Mailgun
OpenSend #19 in Email APIs 6.8/10 Free plan Free plan✓ 4 of 5 features Visit OpenSend

Mailgun leads on 1 check, OpenSend on 1, and 5 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMailgun · 9.7/10
  • Free planboth
  • Free trialonly Mailgun
  • Most featuresMailgun · 5 of 5

Mailgun scores higher on our rubric for email apis: 9.7 against 6.8 out of 10; our editors rank them #1 and #19.

OpenSend leads on monthly send limit: 15000 /mo versus 10000 /mo. Mailgun offers smtp relay; OpenSend doesn't.

Mailgun is the better fit for developers wanting a mature full email API. OpenSend is the better fit for open-source teams wanting a modern email stack.

  • Mailgun fits best

    Developers wanting a mature full email API

  • OpenSend fits best

    Open-source teams wanting a modern email stack

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Mailgun 9.7/10 Visit ↗ OpenSend 6.8/10 Visit ↗
At a glance
Editor score 9.7 6.8
Ranking #1 in Email APIs #19 in Email APIs
Best for Developers wanting a mature full email API Open-source teams wanting a modern email stack
Pricing model Free plan + paid Free plan + paid
Starting price — $10/mo
Free plan ✓ ✓
Free trial 30 days —
Deployment Cloud Cloud, Self-hosted
Platforms Web Web
Features Mailgun 5/5 · OpenSend 4/5
Inbound email ✓ ✓
Delivery event webhooks ✓ ✓
SMTP relay ✓ (best) —
Email templates ✓ ✓
Dedicated IP option ✓ ✓
Specs
Monthly send limit 10000 /mo 15000 /mo (best)
Our review
Pros
  • RESTful API, SMTP relay, inbound routing, and delivery webhooks
  • Templates, analytics, logs, validation, and suppression management
  • Dedicated IP pools, SAML SSO, and live support on Scale
  • Self-hosting with Docker Compose, AWS SES, and Postgres
  • Resend-compatible REST API with TypeScript SDK and React Email support
  • Webhooks, inbound routes, automations, templates, and domain authentication
Cons
  • Paid-plan pricing varies by tier and is not summarized here
  • Advanced features are concentrated in higher plans
  • Broader deliverability tooling may exceed simple sending needs
  • SMTP relay is not supplied
  • Self-hosting requires AWS SES and Postgres
  • The Free plan allows 500 API and broadcast emails monthly
Our verdict

Mailgun is an email delivery platform for developers, marketers, and product teams. It supports transactional and marketing messages through RESTful email APIs and SMTP relay, with inbound email routing, delivery-event webhooks, templates,…

Read the review →

OpenSend is email infrastructure for developers and teams managing transactional email, broadcasts, contacts, templates, automations, inbound messages, and delivery events. It supports web access, an API, and self-hosted deployment. Its…

Read the review →
  1. MailgunEmail APIs 9.7Free plan · 30-day trial
  2. OpenSendEmail APIs 6.8Free plan

Strengths and trade-offs

  • Mailgun — where it wins

    • RESTful API, SMTP relay, inbound routing, and delivery webhooks
    • Templates, analytics, logs, validation, and suppression management
    • Dedicated IP pools, SAML SSO, and live support on Scale

    Where it doesn't

    • Paid-plan pricing varies by tier and is not summarized here
    • Advanced features are concentrated in higher plans
    • Broader deliverability tooling may exceed simple sending needs

  • OpenSend — where it wins

    • Self-hosting with Docker Compose, AWS SES, and Postgres
    • Resend-compatible REST API with TypeScript SDK and React Email support
    • Webhooks, inbound routes, automations, templates, and domain authentication

    Where it doesn't

    • SMTP relay is not supplied
    • Self-hosting requires AWS SES and Postgres
    • The Free plan allows 500 API and broadcast emails monthly
  • Mailgun9.7/10 · Free plan · 30-day trial

    A mature email API with broad sending, inbound routing, tracking, and deliverability tools.

    Visit MailgunFull verdict →
  • OpenSend6.8/10 · Free plan

    A flexible email stack for developers, with self-hosting and a Resend-compatible API.

    Visit OpenSendFull verdict →

More comparisons

All email APIs comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update