Fonoster
Fonoster jumps to v0.33 in a week, rebuilding its SIP and media edge and defaulting to HTTPS.
A side-by-side editorial comparison of Salesmsg and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
Salesmsg Reviews can now trigger follow-ups automatically based on a customer's latest rating.
Salesmsg upgraded Reviews: follow-ups can fire automatically based on a customer's most recent rating, reviewers can be messaged in bulk or answered directly from review analytics, and results can be exported. It follows an official MCP server listed with Claude and ChatGPT, call tracking and AI call scorecards, and recurring NPS surveys that enrol contacts in automations.
Stalwart adds full SCIM v2 provisioning and 24-language calendar support as its standards coverage extends further than most commercial mail servers.
Stalwart is maintaining a weekly-or-faster release cadence, with alternating feature releases and dense bug-fix releases. The v0.16.20 release landed full SCIM v2 (Enterprise) including cursor-based pagination and the IPSIE lifecycle profile, conference links in calendar invites, and 24 new calendar interface translations. Below the feature line, the project is steadily closing correctness gaps across JMAP, CalDAV, IMAP, and MTA — many of them edge-case RFC compliance issues.
Salesmsg upgraded Reviews: follow-ups can fire automatically based on a customer's most recent rating, reviewers can be messaged in bulk or answered directly from review analytics, and results can be exported. It follows an official MCP server listed with Claude and ChatGPT, call tracking and AI call scorecards, and recurring NPS surveys that enrol contacts in automations.
Salesmsg is connecting feedback (surveys, NPS, reviews) to its texting and calling automations, so a customer's score decides what happens next. Alongside that, AI agents for calls and texts and the MCP server extend who, or what, can act on those conversations.
Expect review and survey scores to feed the AI texting and calling agents directly, and more CRM sync for review data.
Stalwart is maintaining a weekly-or-faster release cadence, with alternating feature releases and dense bug-fix releases. The v0.16.20 release landed full SCIM v2 (Enterprise) including cursor-based pagination and the IPSIE lifecycle profile, conference links in calendar invites, and 24 new calendar interface translations. Below the feature line, the project is steadily closing correctness gaps across JMAP, CalDAV, IMAP, and MTA — many of them edge-case RFC compliance issues.
Stalwart is building toward parity with commercial enterprise mail servers on identity federation and provisioning (SCIM v2, VAPID for web push, DMARCbis/DKIM2 already landed). The pace of RFC implementation is unusually aggressive for an open-source project; the combination of JMAP, CalDAV, IMAP UIDONLY/UIDBATCHES, and SCIM v2 positions it as a viable self-hosted alternative for organizations that need standards compliance without vendor lock-in.
WebAuthn/passkey-based authentication and improved multi-tenant administration tooling are the most likely next capability additions, given the current trajectory toward enterprise identity management.
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 Salesmsg or Stalwart.
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Twilio follows Cohorts with three GA control APIs for webhooks, recording and caller trust.
See all Salesmsg alternatives → · See all Stalwart alternatives →
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart is currently shipping more aggressively (velocity 6.3 vs 5.0), 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.
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart is currently shipping more aggressively (velocity 6.3 vs 5.0), 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.
Top Salesmsg alternatives in Comms are ranked by recent ship velocity. Browse the "Salesmsg alternatives" section above for the current picks, or visit /alternatives/salesmsg for the full list with editorial commentary on each.
Top Stalwart alternatives in Comms are ranked by recent ship velocity. Browse the "Stalwart alternatives" section above for the current picks, or visit /alternatives/stalwart for the full list with editorial commentary on each.