Rspamd
Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
Comparison · Comms
Wire vs Slack
A side-by-side editorial comparison of Wire and Slack — release velocity, themes, recent moves, and the top alternatives to consider.
Wire vs Slack: at a glance
What is Wire?
Wire's web app is quietly moving conversations from Proteus to MLS encryption.
Wire's web client ships production tags every one to three weeks. The September release adds meeting reminders, better search for apps and people, and locale-aware dates, but its most consequential lines are about migrating conversations from the Proteus protocol to MLS: unread messages are preserved, read receipts are handled correctly afterwards, and MLS key-package recovery is more reliable. The October tag that followed is bare, with no notes.
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.
Wire vs Slack: editorial side-by-side
Wire
2.5COMMS
Wire's web app is quietly moving conversations from Proteus to MLS encryption.
◆ Current state
Wire's web client ships production tags every one to three weeks. The September release adds meeting reminders, better search for apps and people, and locale-aware dates, but its most consequential lines are about migrating conversations from the Proteus protocol to MLS: unread messages are preserved, read receipts are handled correctly afterwards, and MLS key-package recovery is more reliable. The October tag that followed is bare, with no notes.
◆ Where it's heading
The earlier window was about calling, with background effects and audio processing hardened over the summer. September's notes put the encryption protocol move front and centre, and the specific fixes suggest live conversations are already being migrated. Bare production tags still appear between documented releases, so roughly half the cadence is undocumented.
◆ Prediction
Expect more MLS migration fixes in the next documented release, since this one reads like the first wave of reported edge cases. Whether calling work resumes alongside is unclear from these entries.
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.
Alternatives to Wire 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 Wire or Slack.
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 Wire 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
- 1mo agoWireProduction tag with no release notes
- 1mo agoWireMeeting reminders; Proteus-to-MLS migration fixes
- 2mo agoWireBackground effects in calls; Proteus session reset recovery
- 2mo agoWireProduction tag with no upstream release
- 3mo agoWireFilter and sort in Shared Drives; call effects fixes
- 4mo agoWireCall quality and app lock configuration improvements
Frequently asked questions
What is the difference between Wire and Slack?
They serve adjacent needs but don't currently overlap on shipped themes. Slack is currently shipping more aggressively (velocity 6.3 vs 2.5), 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 Wire 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 2.5), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Wire?
Top Wire alternatives in Comms are ranked by recent ship velocity. Browse the "Wire alternatives" section above for the current picks, or visit /alternatives/wire 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.