OpenSend

opensend.namuh.co · checked 8 Oct 2026

#23 · Email APIs

Visit opensend.namuh.co ↗ Alternatives OpenSend vs Mailazy

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Email APIs5.7#23 of 31

OpenSend describes itself as an open email infrastructure platform with a Resend-compatible API, SDK, broadcasts, contacts, and dashboard.

Pricing

Lite$10/mo · 15,000 API + broadcast emails/mo · 3 verified domains · 5 API keys · Community support$10/mo
Starter$19/mo · 51,000 API + broadcast emails/mo · 10 verified domains · 10 API keys · Email support · 48h$19/mo
Growth$99/mo · 120,000 API + broadcast emails/mo · 1,000 verified domains · 25 API keys · Priority support · 12h$99/mo
Free$0/mo · 500 API + broadcast emails/mo · 1 verified domain · 2 API keys · Community supportOn request
ScaleLet's talk · Unlimited emails (your SES) · Unlimited domains · Unlimited keys · Dedicated infra & VPC peering · Slack channel · 1h SLAOn request

As opensend.namuh.co lists them, checked 8 Oct 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: opensend.namuh.co
Price: Free tier · from $10/mo
Free trial: Not stated
Company: The homepage says OpenSend is built by Jaeyun Ha and Ashley Ha.
Data control: Self-hosted OpenSend uses the operator's AWS SES quota, database, secrets, and observability stack.
Features: The product includes contacts, segments, topics, email automations, templates, open and click analytics, and email event tracking.
Integrations: The self-hosting guide documents AWS SES/SNS, PostgreSQL, Redis, S3, Cloudflare DNS automation, and Google OAuth configuration.
Overages: Cloud sends are not blocked after the quota; overage is billed at $0.85 per 1,000 emails until the customer upgrades.
Security: Dashboard and API routes are tenant-scoped through Better Auth organizations and server-side ownership checks.
Self-host license: The pricing page says OpenSend can be used, modified, and self-hosted for free, including commercially, under ELv2, with hosted resale as the stated restriction.
Sending: OpenSend sends email through AWS SES and supports API sends, batch sends, scheduled sends, and broadcasts.
Support: The Free and Lite plans include community support, Starter has email support with a 48-hour response target, and Growth has priority support with a 12-hour target.
Webhooks: Outbound webhooks use HMAC signatures with Svix-compatible headers, which recipients should verify before processing events.

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