Zoho Mail
Zoho Mail is annexing the workday around the inbox: web tabs, tasks, and an MCP endpoint.
Comparison · Comms
Converse.js vs Slack
A side-by-side editorial comparison of Converse.js and Slack — release velocity, themes, recent moves, and the top alternatives to consider.
Converse.js vs Slack: at a glance
What is Converse.js?
Converse.js 14 lands OMEMO:2 — the browser XMPP client catches up on modern encryption.
Converse.js reached 14.0.0 in June 2026 after a tight beta train, and the release is defined by one thing: support for OMEMO:2, the current revision of XMPP's end-to-end encryption. The surrounding work is all encryption ergonomics — per-chat encryption state remembered across chat-close and re-login, an explicit error surfaced for undecryptable messages instead of silently dropping them, the toggle hidden on untrusted devices, and original filenames preserved on encrypted image download. New PubSub API methods for create, subscribe and unsubscribe round out the release.
What is Slack?
Slack is shipping its developer platform to coding agents, not only to developers.
The developer changelog runs two tracks at once. One is a routine modernization wave across the client libraries: Bolt for JS reached v5, the Node SDK packages took coordinated major versions, and the CLI shipped twice in ten days. The other is newer and smaller in volume but larger in intent, aimed at AI tooling rather than at people writing apps by hand.
Converse.js vs Slack: editorial side-by-side
Converse.js
0.0COMMS
Converse.js 14 lands OMEMO:2 — the browser XMPP client catches up on modern encryption.
◆ Current state
Converse.js reached 14.0.0 in June 2026 after a tight beta train, and the release is defined by one thing: support for OMEMO:2, the current revision of XMPP's end-to-end encryption. The surrounding work is all encryption ergonomics — per-chat encryption state remembered across chat-close and re-login, an explicit error surfaced for undecryptable messages instead of silently dropping them, the toggle hidden on untrusted devices, and original filenames preserved on encrypted image download. New PubSub API methods for create, subscribe and unsubscribe round out the release.
◆ Where it's heading
The project is closing the gap between having encryption and having usable encryption. Almost every OMEMO change in this cycle is about failure modes users previously had to guess at: a silently dropped message, an encryption toggle offered where it cannot work, an abandoned bundle that never self-healed. That is the work a client does when its encryption is no longer a demo but something people depend on daily. Dropping client-compress for native browser APIs points the same way — fewer bundled dependencies in a security-sensitive path.
◆ Prediction
Expect the 14.x line to settle into interoperability fixes as OMEMO:2 meets other XMPP clients in the wild, with the new PubSub API the most likely base for the next feature layer.
Slack
6.3COMMSCOLLAB
Slack is shipping its developer platform to coding agents, not only to developers.
◆ Current state
The developer changelog runs two tracks at once. One is a routine modernization wave across the client libraries: Bolt for JS reached v5, the Node SDK packages took coordinated major versions, and the CLI shipped twice in ten days. The other is newer and smaller in volume but larger in intent, aimed at AI tooling rather than at people writing apps by hand.
◆ Where it's heading
The MCP and Skills plugin is the clearest signal of where this is going: Slack is packaging its own platform knowledge for consumption by coding agents, and naming Claude Code and Cursor as the first targets rather than shipping a generic endpoint. Meanwhile the SDK work is clearing debt that would get in the way, dropping axios for native Fetch, removing the deprecated Workflow Steps from Apps feature, and raising the Node floor to 20. Modern runtime, fewer legacy surfaces, then agent access on top.
◆ Prediction
The plugin ships for two named agent clients today, so the obvious next step is broadening that list or folding the skills into the CLI itself. The entries do not indicate whether Slack intends the MCP server to reach runtime app behaviour or stay a build-time developer aid.
Alternatives to Converse.js 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 Converse.js or Slack.
Stalwart
Stalwart keeps chasing standards nobody has implemented yet — DKIM2, DMARCbis, now JMAP email push.
Maddy
A one-binary mail server learning to behave like production infrastructure.
Friendica
Friendica keeps betting on being the fediverse node that speaks everyone else's protocols.
diaspora
The original federated social network now ships roughly once every two years.
mailcow
Six releases, and every one of them is a security update in some form.
See all Converse.js alternatives → · See all Slack alternatives →
Recent activity from Converse.js and Slack
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoSlackAnnouncing the Slack MCP and Skills Plugin ⚡
- 4d agoSlackRelease: Slack CLI v4.6.0
- 13d agoSlackRelease: Slack CLI v4.5.0
- 19d agoSlackRelease: Bolt for JS v5
- 20d agoSlackRelease: Multiple Node Slack SDK package updates
- 21d agoSlackDesktop notifications now pull text from blocks first
- 1mo agoConverse.jsOMEMO:2 encryption support ships in Converse 14 ⚡
- 1mo agoConverse.jsOMEMO bundle self-healing and new PubSub API methods
- 1mo agoConverse.jslibomemo.js dependency bump
- 1mo agoConverse.jsclient-compress replaced with native browser APIs
- 1mo agoConverse.jsFirst beta carrying the OMEMO usability fixes
- 2mo agoConverse.jsReaction attribution and MUC JID parsing fixes
Frequently asked questions
What is the difference between Converse.js and Slack?
They serve adjacent needs but don't currently overlap on shipped themes. Slack is currently shipping more aggressively (velocity 6.3 vs 0.0), 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 Converse.js 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 0.0), 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 Converse.js?
Top Converse.js alternatives in Comms are ranked by recent ship velocity. Browse the "Converse.js alternatives" section above for the current picks, or visit /alternatives/converse-js 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.