Open source alternatives to SendGrid

2 projects on starwire do the same job. Ranked by how much of what SendGrid does each one covers, read from its README and website. Ties go to the most active.

What SendGrid does

Transactional email APIcore
SMTP relaycore
Marketing campaigns
Email templates
Delivery and open analytics
Inbound email parsing
Domain authentication
Webhooks for events

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
useSendOpen source email sending platform with an SES dashboard, alternative to Resend	Replaces it95%	4.8k+22	33	7 days ago	57%	Hosted, paid	AGPL-3.0
Covers all 2 core jobs. Partly: Inbound email parsing.See the evidence Transactional email APIcoreYesTransactional Mails SMTP relaycoreYesSMTP support Marketing campaignsYesMarketing email Email templatesYesReuse templates and brand styles Delivery and open analyticsYesDashboard (Delivered, opened, clicked, bounced) Inbound email parsingPartlyInbound email Domain authenticationYesAdd domains Webhooks for eventsYesWebhook support
e2aEmail API for apps and agents, hosted or self-hosted with Docker	Covers one part85%	199	135	35 days ago	100%	Hosted, free plan	Apache-2.0
Covers all 2 core jobs. Partly: Marketing campaigns; Delivery and open analytics; Domain authentication.See the evidence Transactional email APIcoreYesSend transactional email SMTP relaycoreYesagents send to other agents (SMTP relay) Marketing campaignsPartlyContacts & outreach (beta) Email templatesYesEmail templates (beta) Delivery and open analyticsPartlyserver-derived reply/delivery facts Inbound email parsingYesInbound mail arrives with structured SPF, DKIM, and DMARC evidence Domain authenticationPartlypoint a mail domain at your relay Webhooks for eventsYessigned webhooks, WebSocket delivery

Vital signs from GitHub, checked weekly. How we read these · How setup is read

These also replace

Resend1 Postmark1 Mailgun1

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