replacing SendGrid
Email delivery API — SendGrid pricing: $19.95-$89.95/month. Below: 2 free, self-hostable open source projects that cover the same ground, ranked by real GitHub adoption.
There are 2 open source SendGrid alternatives tracked on this registry, against SendGrid pricing of $19.95-$89.95/month. The most-adopted is Listmonk with 23,471 GitHub stars under AGPL-3.0, written in Go. Together the set has 33,996 stars across 2 languages and 1 licence. All 2 are free to self-host with no licence fee, and 2 of 2 received a commit in the last 90 days. 2 head-to-head SendGrid comparisons are available.
Listmonk is a standalone, self-hosted newsletter and mailing list manager in the open-source business software and marketing customer engagement ecosystem. It packages campaign management, subscriber management, and email delivery controls into a single binary application with a modern dashboard, and it uses PostgreSQL as its data store.
AGPL-3.0 · Go · SendGrid vs Listmonk →
Mautic is open source marketing automation software written in PHP. It lives in the PHP open-source marketing automation ecosystem and positions itself as an alternative to Mailchimp and SendGrid. It targets businesses and organizations that need campaign delivery, audience segmentation, email marketing, multi-channel messaging, and direct control over marketing data.
NOASSERTION · PHP · SendGrid vs Mautic →
Self-hosted newsletter and mailing list manager
Open source marketing automation for everyone
last updated nightly · ranking method: github stars, live-tracked
Listmonk is the most-starred open source alternative to SendGrid in this registry, with 23,471 GitHub stars. 2 alternatives are compared here in total.
Yes. Every project listed on this page is open source and free to self-host — there is no licence fee. Some projects also sell a managed hosted version, but the self-hosted path costs nothing.
Compare licence terms, community size (stars), primary language and release activity. A fast-moving project with a compatible licence and an active maintainer base matters more than raw star count when you are committing to a migration.