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Comparison · Comms
Grain vs Stalwart
A side-by-side editorial comparison of Grain and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
Grain vs Stalwart: at a glance
| Feature | Grain | Stalwart |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 3.8 | 5.0 |
| Sparks · 30d | 1 | 0 |
| Top themes | meeting-intelligence, ai-integration, chatgpt-plugin, mcp | email-standards, jmap, imap, dmarc |
| Last editorial update | 27d ago | 1d ago |
| Website | — | Visit → |
What is Grain?
Grain reframes itself as the meeting layer for your AI, shipping a ChatGPT plugin and MCP tools.
Grain is a meeting-recording and notes product that has spent recent releases wiring itself into AI assistants. After adding one-click send-to-Claude/ChatGPT and an MCP server in the spring, it now ships as a full ChatGPT plugin with a broader MCP tool set and sharper auto-notes. The underlying capture stack (live notepad, meeting detection, clipping, uploads API) is mature.
What is Stalwart?
Stalwart is shipping email's next-generation auth stack while the specs are still in draft.
Stalwart is an all-in-one mail and collaboration server — SMTP, IMAP, JMAP, CalDAV, CardDAV and WebDAV in one binary — releasing every one to two weeks on the 0.16.x line. The last two months read as a standards campaign: DKIM2 and the full DMARCbis set in 0.16.12, VAPID push in 0.16.14, FreeBSD support in 0.16.13, and a run of IMAP extensions (UIDONLY, UIDBATCHES, MESSAGELIMIT/SAVELIMIT) in 0.16.17. Between the additions, most of each release is JMAP conformance repair driven by the jmap-test-suite.
Grain vs Stalwart: editorial side-by-side
Grain
3.8COMMS
Grain reframes itself as the meeting layer for your AI, shipping a ChatGPT plugin and MCP tools.
◆ Current state
Grain is a meeting-recording and notes product that has spent recent releases wiring itself into AI assistants. After adding one-click send-to-Claude/ChatGPT and an MCP server in the spring, it now ships as a full ChatGPT plugin with a broader MCP tool set and sharper auto-notes. The underlying capture stack (live notepad, meeting detection, clipping, uploads API) is mature.
◆ Where it's heading
Grain is repositioning from a standalone recorder toward an interoperable context source that feeds meeting decisions and rationale into whatever AI tool a team already uses. Each release lowers the friction of getting meeting data out of Grain and into an assistant, betting that distribution inside ChatGPT and MCP clients matters more than owning the end-user surface.
◆ Prediction
Expect Grain to extend its plugin and MCP coverage to more assistants and deepen project-level context sharing, competing on how cleanly meeting data lands in AI tools rather than on the recorder UI itself.
Stalwart
5.0COMMS
Stalwart is shipping email's next-generation auth stack while the specs are still in draft.
◆ Current state
Stalwart is an all-in-one mail and collaboration server — SMTP, IMAP, JMAP, CalDAV, CardDAV and WebDAV in one binary — releasing every one to two weeks on the 0.16.x line. The last two months read as a standards campaign: DKIM2 and the full DMARCbis set in 0.16.12, VAPID push in 0.16.14, FreeBSD support in 0.16.13, and a run of IMAP extensions (UIDONLY, UIDBATCHES, MESSAGELIMIT/SAVELIMIT) in 0.16.17. Between the additions, most of each release is JMAP conformance repair driven by the jmap-test-suite.
◆ Where it's heading
The project is building toward being the reference implementation of the modern mail stack — JMAP first, with the classic protocols held at parity rather than left behind. The fix lists have shifted in character over these eight releases: less "feature does not work", more "spec detail is wrong", which is what a codebase looks like as it converges on conformance. Security and multi-tenancy fixes keep appearing alongside the protocol work, indicating real deployments are exercising the newer subsystems.
◆ Prediction
The next releases most likely track revisions to the drafts already implemented — DKIM2, JMAP push and the calendar drafts are all still moving — rather than adding another protocol surface. Expect continued JMAP conformance fixes until the test suite stops producing them.
Alternatives to Grain and Stalwart
Other Comms products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Grain or Stalwart.
Synapse
Synapse alternates release candidates with security patches on a tight two-week cycle
Canary Mail
Canary Mail ships maintenance across four platform lines; features have gone quiet since April.
Bandwidth
Bandwidth is closing the gaps that used to require a support ticket
Beeper
Beeper stopped aggregating apps and started merging the people inside them.
Respond.io
respond.io is monetizing AI usage directly while putting an assistant that builds agents in every workspace.
See all Grain alternatives → · See all Stalwart alternatives →
Recent activity from Grain and Stalwart
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoStalwartIMAP gains UIDONLY, UIDBATCHES and message-limit extensions
- 9d agoStalwartJMAP delivery push arrives; strict relays stop rejecting calendar mail
- 16d agoStalwartFix-only release: JMAP semantics and a credential escalation
- 22d agoStalwartVAPID lands for JMAP Web Push
- 28d agoGrainGrain in ChatGPT + Smarter Notes and MCP Tools ⚡
- 1mo agoStalwartFreeBSD support, plus OAuth scopes for IMAP, SMTP and Sieve
- 1mo agoStalwartDKIM2 and the full DMARCbis suite ship in one release ⚡
- 2mo agoGrainOpt-in meeting notifications, better playlists, and more!
- 3mo agoGrainGrain MCP + Bulk AI Actions and API Updates ⚡
- 4mo agoGrainNew Home Page + Improved Zapier Integration
- 4mo agoGrainNew Home Page + Improved Zapier Integration
- 5mo agoGrainLive Experience, New Meeting Page, + API Additions
Frequently asked questions
What is the difference between Grain and Stalwart?
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart is currently shipping more aggressively (velocity 5.0 vs 3.8), with 0 editorial sparks in the last 30 days against 1. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Grain better than Stalwart?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart is currently shipping more aggressively (velocity 5.0 vs 3.8), with 0 editorial sparks in the last 30 days against 1. For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Grain?
Top Grain alternatives in Comms are ranked by recent ship velocity. Browse the "Grain alternatives" section above for the current picks, or visit /alternatives/grain for the full list with editorial commentary on each.
What are the best alternatives to Stalwart?
Top Stalwart alternatives in Comms are ranked by recent ship velocity. Browse the "Stalwart alternatives" section above for the current picks, or visit /alternatives/stalwart for the full list with editorial commentary on each.