Interact
Interact opens its intranet to outside AI assistants and uses Claude to attack its own platform.
Comparison · Collab
Memos vs Slack
A side-by-side editorial comparison of Memos and Slack — release velocity, themes, recent moves, and the top alternatives to consider.
Memos vs Slack: at a glance
What is Memos?
Memos adopts calendar versions and rebuilds writing around one block editor.
Memos has moved to calendar versioning, with 26.10 candidates following 0.31 and versions now written YY.MM.N. 26.10.0-rc.2 replaces the editor with one block editor shared by writing and reading, and turns the instance-wide memo length and upload caps into ordered per-user usage limits that also cover memo count and total storage. rc.1 added editor suggestions and transcription of existing audio attachments, and Spaces now follow the user across Timeline, Calendar, Map and Attachments.
What is Slack?
Slack now hosts any A2A agent without Slack-specific code.
Slack's developer channel is almost all agent plumbing. On 10 November Slack became an A2A (Agent2Agent) client: a team hosts its own agent, publishes an Agent Card, and Slack calls it when people talk to it, with no request URL, event handling or Slack-specific logic. This follows Slackbot skills managed through Web API methods, a Slack CLI that points coding agents to the Slack MCP server, and a new requirement that Work Objects embeds allow the slack-mcps.com frame ancestor.
Memos vs Slack: editorial side-by-side
Memos
5.0COLLAB
Memos adopts calendar versions and rebuilds writing around one block editor.
◆ Current state
Memos has moved to calendar versioning, with 26.10 candidates following 0.31 and versions now written YY.MM.N. 26.10.0-rc.2 replaces the editor with one block editor shared by writing and reading, and turns the instance-wide memo length and upload caps into ordered per-user usage limits that also cover memo count and total storage. rc.1 added editor suggestions and transcription of existing audio attachments, and Spaces now follow the user across Timeline, Calendar, Map and Attachments.
◆ Where it's heading
Spaces made Memos multi-user, and usage limits are what an administrator needs once several people share an instance. The candidate keeps spending compatibility to get there: upgrading signs everyone out because access tokens are bound to the password, and the old size settings are removed without migration, leaving defaults of 8 KiB per memo and 32 MiB per file. The HTTP layer also moved to the Go standard library, with operators asked to report reverse-proxy differences.
◆ Prediction
Expect 26.10.0 stable with those upgrade notes intact. Reverse-proxy reports against the new HTTP layer are the likeliest cause of another candidate.
Slack
6.3COMMSCOLLAB
Slack now hosts any A2A agent without Slack-specific code.
◆ Current state
Slack's developer channel is almost all agent plumbing. On 10 November Slack became an A2A (Agent2Agent) client: a team hosts its own agent, publishes an Agent Card, and Slack calls it when people talk to it, with no request URL, event handling or Slack-specific logic. This follows Slackbot skills managed through Web API methods, a Slack CLI that points coding agents to the Slack MCP server, and a new requirement that Work Objects embeds allow the slack-mcps.com frame ancestor.
◆ Where it's heading
Slack is lowering the cost of putting outside agents in front of its users: first skills as code, then MCP pointers for coding agents, now a standard protocol in place of the Slack app model for agents. The platform is positioning itself as the place where agents built anywhere meet the people who use them.
◆ Prediction
Expect more A2A follow-ups, such as agents appearing in Slackbot or skills surfaces and richer Agent Card features, given how fast the agent releases have stacked up since October.
Memos alternatives
Other Collab products tracked by Sparkpulse, ranked by recent ship velocity. Tap any card for the full editorial trajectory or compare directly with Memos.
Nextcloud
Nextcloud's November patches lean on preview speed and sharing fixes across three branches.
Mattermost
Mattermost v12.1 puts bots and burn-after-reading messages under the same access rules.
Asana
Asana lets Division admins run their own custom roles, on top Enterprise plans only.
Double
Double turns a recorded Chrome session into an agent that repeats the task.
SiYuan
SiYuan 3.8.11 alphas add freeform mind maps and plugin snapshots right after 3.8.10.
Slack alternatives
Other Collab products tracked by Sparkpulse, ranked by recent ship velocity. Tap any card for the full editorial trajectory or compare directly with Slack.
Rspamd
Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
Twilio
Twilio's voice AI stops cutting callers off mid-sentence, using its own turn-taking model.
Salesmsg
Salesmsg adds call-back requests and a one-click Emergency Stop for all outbound texts.
Element
Element 1.12.35 follows the call picture-in-picture release with one desktop storage fix.
Krisp
Krisp moves call transcripts and live captions to cloud transcription in KrispCX 2.84.4.
Misskey
Misskey 2026.11 ships: a leaner start script, and Node.js 22 no longer boots.
Recent activity from Memos and Slack
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 4d agoSlackBring your A2A agents to Slack ⚡
- 8d agoSlackWork Objects embeds require the slack-mcps.com frame ancestor
- 10d agoSlackSlack CLI 4.13 tells coding agents about Slack MCP and Skills
- 10d agoSlackSlack Skills Plugin installs in Claude Code from its own marketplace
- 12d agoSlackUpdated low-usage submission criteria for Slack Marketplace apps
- 15d agoSlackSlack CLI 4.12.0, the fourth CLI release in October
- 18d agoMemosOne block editor, per-user usage limits and calendar versions
- 1mo agoMemosEditor suggestions, audio transcription, unified browsing
- 2mo agoMemosCalendar and Map pages, moving memos between Spaces
- 2mo agoMemosCollaborative Spaces, author-owned memos, and Saved Views ⚡
- 3mo agoMemosEmbedded MCP endpoint, live SSE updates, and revocable share links ⚡
- 3mo agoMemosMemos Web Clipper and a redesigned memo detail rail
Frequently asked questions
What is the difference between Memos and Slack?
They serve adjacent needs but don't currently overlap on shipped themes. Slack is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Memos better than Slack?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Slack is currently shipping more aggressively (velocity 6.3 vs 5.0), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Collab products to evaluate alongside.
What are the best alternatives to Memos?
Top Memos alternatives in Collab are ranked by recent ship velocity. Browse the "Memos alternatives" section above for the current picks, or visit /alternatives/memos for the full list with editorial commentary on each.
What are the best alternatives to Slack?
Top Slack alternatives in Collab 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.