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Comparison · Comms
Misskey vs Slack
A side-by-side editorial comparison of Misskey and Slack — release velocity, themes, recent moves, and the top alternatives to consider.
Misskey vs Slack: at a glance
What is Misskey?
Misskey deleted its bundled machine-learning stack and made moderation someone else's service to run.
The visible history is essentially one release train, nine tags from 2026.7.0-beta.0 through the 2026.7.0 release, plus the first alpha of 2026.8.0. The defining change is that sensitive-media detection no longer runs inside Misskey: nsfwjs, TensorFlow.js, and the bundled NSFW model are gone from the codebase, replaced by HTTP calls to a separate sensitive-detector service. Operators who rely on the feature must stand that service up and point the control panel at it; if they do not, detection stops and all media is treated as non-sensitive.
What is Slack?
Slack raises the Marketplace bar back to ten installs while the agent platform consolidates.
Slack's developer platform runs two tracks. The agent build-out has produced a spark roughly every two weeks since June — MCP client, a skills plugin targeting Claude Code and Cursor, and Slack Code — and now has a consolidation date attached: assistant_view is deprecated in February 2027, replaced by an Agent Sessions API. The second track is platform administration and tooling, and this window belongs to it: Marketplace submissions again require at least ten installed active workspaces, held throughout the review, after a period at a lower temporary threshold. The CLI has shipped three times since late July.
Misskey vs Slack: editorial side-by-side
Misskey
6.3COMMS
Misskey deleted its bundled machine-learning stack and made moderation someone else's service to run.
◆ Current state
The visible history is essentially one release train, nine tags from 2026.7.0-beta.0 through the 2026.7.0 release, plus the first alpha of 2026.8.0. The defining change is that sensitive-media detection no longer runs inside Misskey: nsfwjs, TensorFlow.js, and the bundled NSFW model are gone from the codebase, replaced by HTTP calls to a separate sensitive-detector service. Operators who rely on the feature must stand that service up and point the control panel at it; if they do not, detection stops and all media is treated as non-sensitive.
◆ Where it's heading
The direction is a smaller, more conventional Node application with its heavy and specialized dependencies pushed outside the process. The same release raises the Node floor to 22.22.2, 24.17.0 and 26.4.0, moves the Docker image to Node 26 on Debian trixie, and inherits a sharp requirement that breaks x86_64 CPUs without SSE4.2. The rebuilt logging layer points the same way, with one-line JSON output, per-domain levels, automatic credential redaction, and Sentry trace correlation, which is what an operator using standard tooling wants rather than what a self-contained appliance would ship.
◆ Prediction
Node 22 support is already flagged for removal, so the next train should drop it. Whether OpenTelemetry returns after being pulled between beta.6 and the release candidate is not something these entries settle.
Slack
6.3COMMSCOLLAB
Slack raises the Marketplace bar back to ten installs while the agent platform consolidates.
◆ Current state
Slack's developer platform runs two tracks. The agent build-out has produced a spark roughly every two weeks since June — MCP client, a skills plugin targeting Claude Code and Cursor, and Slack Code — and now has a consolidation date attached: assistant_view is deprecated in February 2027, replaced by an Agent Sessions API. The second track is platform administration and tooling, and this window belongs to it: Marketplace submissions again require at least ten installed active workspaces, held throughout the review, after a period at a lower temporary threshold. The CLI has shipped three times since late July.
◆ Where it's heading
The install requirement moving back up is a distribution decision arriving in the middle of a platform push, and the two point the same way. Slack is making it easier to build agents and harder to list one, which favours developers who already have distribution — existing workspace tools and vendors — over a new app hoping the Marketplace supplies its first users. Combined with the assistant deprecation and the Agent Sessions API, the platform is narrowing on one agent surface and one class of builder rather than widening the funnel.
◆ Prediction
The threshold is described as a return from a temporary lower bar rather than a new policy, so the open question is what replaces the Marketplace as the discovery path for an app that cannot reach ten workspaces on its own. These entries do not answer it.
Alternatives to Misskey and Slack
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 Misskey or Slack.
Element X Android
Element X Android ships roughly weekly, alternating real features with fix rounds
Wire
Calling is the one surface Wire's web client touches in every documented release.
Zoho Cliq
Zoho retells Cliq 7.0 as an AI story, and lets customers pick whose model tells it.
Rocket.Chat
Rocket.Chat finishes the 8.8 calling work while the licence wall for SSO gets a date.
Bandwidth
Bandwidth sells trust in the call, and self-service everywhere it used to sell tickets.
See all Misskey alternatives → · See all Slack alternatives →
Recent activity from Misskey and Slack
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoSlackUpdated installation requirement for Slack Marketplace apps
- 2d agoSlackCLI adds app-approval status checks and custom app icons
- 13d agoSlackAnnouncing Slack Code ⚡
- 13d agoSlackAgent Sessions API replaces assistant_view, deprecated Feb 2027
- 18d agoMisskeyImage viewer gains a pixel-art zoom mode
- 1mo agoMisskeyNSFW detection moves out of core to an external service ⚡
- 1mo agoSlackAnnouncing the Slack MCP and Skills Plugin ⚡
- 1mo agoSlackCLI adds manifest diff and a Block Kit preview command
- 1mo agoMisskeyRelease candidate drops OpenTelemetry from 2026.7.0
- 1mo agoMisskeyImage viewer rebuilt and upload preview added
- 1mo agoMisskeyFixes account creation API for non-initial accounts
- 1mo agoMisskey2026.7.0-beta.4
Frequently asked questions
What is the difference between Misskey and Slack?
They serve adjacent needs but don't currently overlap on shipped themes. Misskey and Slack are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Misskey better than Slack?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Misskey and Slack are shipping at a similar cadence (velocity 6.3 vs 6.3, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Misskey?
Top Misskey alternatives in Comms are ranked by recent ship velocity. Browse the "Misskey alternatives" section above for the current picks, or visit /alternatives/misskey for the full list with editorial commentary on each.
What are the best alternatives to Slack?
Top Slack alternatives in Comms are ranked by recent ship velocity. Browse the "Slack alternatives" section above for the current picks, or visit /alternatives/slack for the full list with editorial commentary on each.