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Dendrite vs Fonoster

A side-by-side editorial comparison of Dendrite and Fonoster — release velocity, themes, recent moves, and the top alternatives to consider.

Dendrite vs Fonoster: at a glance

FeatureDendriteFonoster
SectorCommsComms
Velocity score0.06.3
Sparks · 30d00
Top themesmatrix, homeserver, fork, federationprogrammable-voice, sip, twilio, open-source
Last editorial update3mo ago20h ago
WebsiteVisit →Visit →

What is Dendrite?

A forked, relicensed Dendrite spent its first year catching up on Matrix protocol and security debt

The window opens with the first release after forking from matrix-org/dendrite under AGPLv3, which fixed long-standing state-reset bugs and added I2P and Onion listening. What follows is a security release closing a server-side request forgery vulnerability, then a release adding room version 12 support and two MSC implementations, and finally two quick patches for unresponsiveness, v12 room joins and malformed PDUs blocking whole transactions.

Read the full Dendrite trajectory →

What is Fonoster?

Fonoster ships four releases in a day to make linking a Twilio number a single step.

Fonoster went from v0.35 to v0.38.1 on October 28. The thread is Twilio: trunk provisioning for a number link is now idempotent, a Twilio number can be linked to an app or SIP agent in one API call, linking moved server-side with an API key or Auth Token (a breaking change), and the Numbers page can do it from the UI. v0.35 also lets Routr be configured through routr-one.yaml.

Read the full Fonoster trajectory →

Dendrite vs Fonoster: editorial side-by-side

D0.0

A forked, relicensed Dendrite spent its first year catching up on Matrix protocol and security debt

◆ Current state

The window opens with the first release after forking from matrix-org/dendrite under AGPLv3, which fixed long-standing state-reset bugs and added I2P and Onion listening. What follows is a security release closing a server-side request forgery vulnerability, then a release adding room version 12 support and two MSC implementations, and finally two quick patches for unresponsiveness, v12 room joins and malformed PDUs blocking whole transactions.

◆ Where it's heading

This is a fork proving it can carry a homeserver. The order is telling: license and state correctness first, then a CVE, then protocol currency with room version 12, then the operational bugs that surface once people actually run it. Several fixes carry outside contributor credits, which is the fork's clearest sign of life.

◆ Prediction

Expect continued protocol catch-up on newer MSCs and room versions plus operational fixes, since federation compatibility is the constraint that sets this project's agenda.

F6.3

Fonoster ships four releases in a day to make linking a Twilio number a single step.

◆ Current state

Fonoster went from v0.35 to v0.38.1 on October 28. The thread is Twilio: trunk provisioning for a number link is now idempotent, a Twilio number can be linked to an app or SIP agent in one API call, linking moved server-side with an API key or Auth Token (a breaking change), and the Numbers page can do it from the UI. v0.35 also lets Routr be configured through routr-one.yaml.

◆ Where it's heading

After rebuilding its SIP and media edge and defaulting to HTTPS in the 0.31 to 0.33 run, Fonoster is now working on onboarding, using Twilio as the way to bring an existing number. The release rate stays very high and breaking changes still land in minor versions.

◆ Prediction

Expect the same number-linking flow for other carriers, or more Numbers page work; the entries only cover Twilio so far.

Alternatives to Dendrite and Fonoster

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 Dendrite or Fonoster.

See all Dendrite alternatives → · See all Fonoster alternatives →

Recent activity from Dendrite and Fonoster

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 21h agoFonosterv0.38.1: stale proofs repaired, CI checks fault patches
  2. 1d agoFonosterv0.38.0: link a Twilio number from the Numbers page
  3. 1d agoFonosterv0.37.0: one-call Twilio number linking (breaking)
  4. 1d agoFonosterv0.36.0: idempotent Twilio trunk provisioning
  5. 1d agoFonosterv0.35.0: configure Routr via routr-one.yaml
  6. 3d agoFonosterv0.34.3: npm publishing fix
  7. 1y agoDendriteFixes startup crash on rooms lacking a create event
  8. 1y agoDendriteFixes v12 room joins, invites and stalled transactions
  9. 1y agoDendriteRoom version 12 support and NATS refactoring
  10. 1y agoDendriteFixes SSRF in gomatrixserverlib and speeds ACL loading
  11. 1y agoDendriteFirst release after the fork, relicensed under AGPLv3 ⚡

Frequently asked questions

What is the difference between Dendrite and Fonoster?

They serve adjacent needs but don't currently overlap on shipped themes. Fonoster is currently shipping more aggressively (velocity 6.3 vs 0.0), with 0 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 Dendrite better than Fonoster?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fonoster is currently shipping more aggressively (velocity 6.3 vs 0.0), with 0 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 Dendrite?

Top Dendrite alternatives in Comms are ranked by recent ship velocity. Browse the "Dendrite alternatives" section above for the current picks, or visit /alternatives/dendrite for the full list with editorial commentary on each.

What are the best alternatives to Fonoster?

Top Fonoster alternatives in Comms are ranked by recent ship velocity. Browse the "Fonoster alternatives" section above for the current picks, or visit /alternatives/fonoster for the full list with editorial commentary on each.