Confirmed:Self-hosted binary or Docker Compose with PostgreSQL
Confirmed:Self-hosted on Vercel or any Node.js 22+ host
Hosted by the vendor
Code licenceDiffers
Confirmed:MIT
Partial:AGPL-3.0 (copyleft)
Partial:AGPL-3.0
—
Model weights licenceDiffers
Confirmed:No separate model weights
Confirmed:No separate model weights
Confirmed:No bundled weights; AI agents connect through its MCP server
—
Commercial useDiffers
Confirmed:Yes, MIT
Partial:Yes under AGPL-3.0 copyleft terms; no paid edition or feature gating
Partial:Yes, AGPL-3.0; you must share your source if you offer a modified version over a network
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Paid services needed?Differs
Partial:App is free; needs an email service such as Amazon SES, Postmark, SendGrid, Mailgun, Mailjet, Postal or SMTP
Partial:App is free; you need an SMTP server or sending service such as Amazon SES to deliver mail
No:Needs Amazon SES or PostShiba for sending, both paid; MongoDB, QStash and hosting have free tiers
Subscription
HardwareDiffers
Unknown:No hardware figures; needs PHP 8.3+ and MySQL 5.7+ or PostgreSQL 10+
Confirmed:Light; a production instance sent 7M+ emails using a fraction of one core and 57 MB peak RAM
Unknown:Not checked yet
—
Operating systemsDiffers
Partial:Any server with PHP 8.3+, Composer, a web server and MySQL or PostgreSQL; host OS not listed
Confirmed:Binaries for Linux, macOS (Darwin), Windows and the BSDs; Docker image
Partial:Deployment requires Node.js 22+ hosting. No explicit Windows/macOS/Linux server support matrix was verified.
—
Setup effortDiffers
Confirmed:Medium; git clone, composer install, configure a web server and database
Confirmed:Easy; download binary or docker compose up, plus a PostgreSQL database
Partial:Medium; deploy to Vercel or a Node.js host, then set up MongoDB, SES or PostShiba, QStash and DNS
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Stars over time
Switch to Growth % to compare projects of different sizes fairly.
SendPortal
listmonk
Mailcheap
Tracked daily since 16 Oct 2026. Dashed history: estimated from public records of when people starred the repo. Lines connect observations only; gaps contain no measured points.
Growth % starts at each project's first observed point in the shown range. Zero-star starts are unavailable.
Notes for a video or post
A plain summary with today's date and a link to the sources. Check each project page before you publish.
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