OpenSend

At a glance

• Editor score
  6.8 / 10
• Pricing
  Free plan
• Best for
  Open-source teams wanting a modern email stack
• Free plan
  Yes
• Paid from
  $10/mo
• Inbound email
  Yes
• Facts checked
  16 Sep 2026

• 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

Our verdict on OpenSend

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 Resend-compatible REST API handles single and batch sending, while SDK and integration support covers TypeScript, Python, Go, Ruby, React Email, AWS SES, Postgres, and Cloudflare DNS. Open-source teams that want control over deployment and email data will find a broad feature set in one product.

Pricing scales by monthly sending volume and operational scope. Free includes 500 API and broadcast emails per month, one verified domain, two API keys, the REST API, and HMAC-signed webhooks. Lite costs $10 per month and adds 15,000 emails, three verified domains, five API keys, contacts, segments, broadcasts, and automations. Starter costs $19 per month with 51,000 emails, 10 verified domains, 10 API keys, and email support with a 48-hour response target. Growth costs $99 per month and adds 120,000 emails, 1,000 verified domains, custom Return-Path domains, an audit log, and Google SSO. Scale offers unlimited emails based on SES capacity, dedicated infrastructure, VPC peering, BAA and SOC 2 assistance, and Slack support with a one-hour SLA.

The platform’s strongest distinction is its combination of API sending, campaign features, inbound email routes, event webhooks, and domain controls including DKIM, SPF, and DMARC. Idempotency keys support safer email sends and batch rows. Self-hosting with Docker Compose gives teams a deployment path through their own AWS SES account and Postgres database, but it also adds infrastructure responsibility. OpenSend suits engineering-led teams that want an open-source, adaptable email stack; teams specifically seeking SMTP relay should choose an alternative.

Your product? Our editors can test OpenSend in depth and publish a review, labelled as paid · from $149/mo →

OpenSend pricing

All 5 OpenSend plans and prices →

OpenSend fact sheet

OpenSend integrations

OpenSend lists 8 integrations on its own site.

• AWS SES
• Postgres
• Cloudflare DNS
• React Email
• TypeScript
• Python
• Go
• Ruby

Alternatives to OpenSend

• MailgunA mature email API with broad sending, inbound routing, tracking, and deliverability tools.9.7
• Twilio SendGrid Email APIA mature email API with broad developer features, but no ongoing free plan.9.3
• MailjetA broad email platform combining APIs, automation, campaigns, and collaboration.9.1

See all OpenSend alternatives →

Featured on iTechGuides

OpenSend is listed in our Email APIs directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/opensend/"><img src="https://www.itechguides.com/best/badge/opensend.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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.

Last updated 28 Sep 2026 · How we research and update