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Comparison · Comms
Amelia vs Stalwart
A side-by-side editorial comparison of Amelia and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
Amelia vs Stalwart: at a glance
What is Amelia?
Amelia keeps widening from appointments into events, ticketing and payments.
Amelia is a WordPress booking plugin that announces each release as a blog post, roughly monthly. Across 8.5 through 9.7 the shape is consistent: appointments remain the core, but events take an increasing share — QR-code ticketing, invoicing, waiting lists, front-end display controls, and now public event pages in 9.7. Calendar integration and payment flexibility are the other steady threads, and 9.1 introduced Angie AI as an admin-side assistant alongside Outlook sync and Divi 5 support.
What is Stalwart?
Stalwart is chasing mail RFCs and its own storage layer at the same time
Stalwart ships roughly weekly, and the releases divide cleanly between standards implementation and correctness work. v0.16.18 turns toward resource control — bounds on decompressed inbound DMARC and TLS report size, a cap on RocksDB block-cache memory, column families tuned per access pattern, and a queue scheduler that stops rescanning from the earliest pending event. The preceding releases added IMAP UIDONLY, UIDBATCHES and MESSAGELIMIT, plus JMAP email push and VAPID.
Amelia vs Stalwart: editorial side-by-side
Amelia
2.5COMMS
Amelia keeps widening from appointments into events, ticketing and payments.
◆ Current state
Amelia is a WordPress booking plugin that announces each release as a blog post, roughly monthly. Across 8.5 through 9.7 the shape is consistent: appointments remain the core, but events take an increasing share — QR-code ticketing, invoicing, waiting lists, front-end display controls, and now public event pages in 9.7. Calendar integration and payment flexibility are the other steady threads, and 9.1 introduced Angie AI as an admin-side assistant alongside Outlook sync and Divi 5 support.
◆ Where it's heading
The product is growing into a light events-and-payments layer inside WordPress rather than a scheduling widget. The IvyForms integration is the tell on strategy: instead of building a form builder, Amelia delegates pre-booking data collection to a sibling product, which points at a suite rather than one plugin. Full data export and import arriving in 9.7 is the housekeeping a product needs once customers have years of bookings inside it — and once moving between installations becomes a support question.
◆ Prediction
Public event pages give Amelia a front end it did not previously own, so making those pages promotable or discoverable is the natural next step. These posts are summaries rather than changelogs, so specifics are hard to read ahead of time.
Stalwart
5.0COMMS
Stalwart is chasing mail RFCs and its own storage layer at the same time
◆ Current state
Stalwart ships roughly weekly, and the releases divide cleanly between standards implementation and correctness work. v0.16.18 turns toward resource control — bounds on decompressed inbound DMARC and TLS report size, a cap on RocksDB block-cache memory, column families tuned per access pattern, and a queue scheduler that stops rescanning from the earliest pending event. The preceding releases added IMAP UIDONLY, UIDBATCHES and MESSAGELIMIT, plus JMAP email push and VAPID.
◆ Where it's heading
Two threads run through every release. One is RFC coverage across IMAP, JMAP, CalDAV and WebDAV, implemented close to the specification including drafts. The other is a long tail of protocol-conformance fixes, many of them cases where JMAP and IMAP disagreed about the same state. The newest release adds a third: memory and scheduling limits, which is what a server codebase starts doing when deployments get large enough for defaults to hurt.
◆ Prediction
Expect continued RFC additions across the JMAP and IMAP surfaces, with more of the storage-tuning work that v0.16.18 started as RocksDB deployments scale.
Alternatives to Amelia and Stalwart
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 Amelia or Stalwart.
Proton Bridge
Proton Bridge spends its first release in ten weeks on crashes, memory bounds and dead code
Mux
Every manual control Mux ships now arrives with a Robots workflow that does it for you
Netcore Cloud
Netcore's feed remains a demand-generation channel; ten entries, zero product releases.
mailcow
mailcow's release notes are almost entirely upstream security currency.
Openfire
Openfire keeps its XMPP server current without changing what it is.
See all Amelia alternatives → · See all Stalwart alternatives →
Recent activity from Amelia and Stalwart
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoStalwartResource limits arrive for inbound reports and RocksDB caches
- 8d agoStalwartIMAP gains UIDONLY, UIDBATCHES and message-limit extensions
- 16d agoStalwartJMAP delivery push arrives; strict relays stop rejecting calendar mail
- 20d agoAmeliaAmelia 9.7: Public Event Pages, Full Data Export & Import, and More
- 23d agoStalwartFix-only release: JMAP semantics and a credential escalation
- 29d agoStalwartVAPID lands for JMAP Web Push
- 1mo agoStalwartFreeBSD support, plus OAuth scopes for IMAP, SMTP and Sieve
- 2mo agoAmeliaIntroducing Amelia and IvyForms: A New Way to Collect Details Before Booking
- 3mo agoAmeliaAmelia 9.4 Update Brings More Flexibility to Booking and Calendar Management
- 4mo agoAmeliaAmelia 9.3 Update Brings More Control to Scheduling and Events
- 6mo agoAmeliaAmelia 9.1 Is Here – Outlook Sync, Angie AI, Divi 5 Support, and More
- 7mo agoAmeliaAmelia 9.0 Is Live: From Idea to Reality
Frequently asked questions
What is the difference between Amelia and Stalwart?
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 Amelia better than Stalwart?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 Amelia?
Top Amelia alternatives in Comms are ranked by recent ship velocity. Browse the "Amelia alternatives" section above for the current picks, or visit /alternatives/amelia for the full list with editorial commentary on each.
What are the best alternatives to Stalwart?
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.