GravityKit
GravityKit folds every GravityView extension into one Pro plugin.
Comparison · Infra & APIs
Ably vs Duplicati
A side-by-side editorial comparison of Ably and Duplicati — release velocity, themes, recent moves, and the top alternatives to consider.
Ably vs Duplicati: at a glance
| Feature | Ably | Duplicati |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 7.5 | 5.0 |
| Sparks · 30d | 2 | 0 |
| Top themes | ai transport, realtime messaging, agents, mau-billing | backup, restore, auto-update, disk-images |
| Last editorial update | 21h ago | 4d ago |
| Website | — | Visit → |
What is Ably?
Ably's AI Transport hits 1.0 and plugs straight into Vercel's useChat with resumable streams.
Ably is repositioning its realtime pub/sub network as the transport layer for AI agent output. AI Transport JS 1.0 runs on ordinary Pub/Sub channels and ships adaptors for the Vercel AI SDK, OpenAI Responses API and AG-UI, plus a useChat transport that resumes a stream after a reload. It lands a week after the switch to monthly-active-user pricing and breaking SDK majors that split every client into device and server packages.
What is Duplicati?
Duplicati's canary brings back one-click updates and restores disk backups to VHD files.
Duplicati 2.4.1 stable added delta backups for Microsoft 365 and Google Workspace and scheduled restore tests. The 2.4.1.101 canary brings back the automatic updater, now a helper that verifies and installs the signed package for each OS, lets a full disk backup be restored into a raw, VHD or VHDX image, and adds an on/off switch per backup. It also fixes a scheduler that silently used UTC and a case where a vanished USB or network destination was recreated empty.
Ably vs Duplicati: editorial side-by-side
Ably
7.5INFRA · APIS
Ably's AI Transport hits 1.0 and plugs straight into Vercel's useChat with resumable streams.
◆ Current state
Ably is repositioning its realtime pub/sub network as the transport layer for AI agent output. AI Transport JS 1.0 runs on ordinary Pub/Sub channels and ships adaptors for the Vercel AI SDK, OpenAI Responses API and AG-UI, plus a useChat transport that resumes a stream after a reload. It lands a week after the switch to monthly-active-user pricing and breaking SDK majors that split every client into device and server packages.
◆ Where it's heading
The November releases fit one plan: split clients so MAU billing can count end users, then make the AI layer a thin adaptor on top of the same channels used for chat, presence and LiveObjects. Server-side additions in Java and JS (HTTP LiveObjects, channel pools, a Temporal plugin) point at agent backends as the intended publisher.
◆ Prediction
Expect more agent framework adaptors and server SDKs reaching AI Transport parity, with Chat and LiveObjects examples built around agents joining human conversations.
Duplicati
5.0INFRA · APIS
Duplicati's canary brings back one-click updates and restores disk backups to VHD files.
◆ Current state
Duplicati 2.4.1 stable added delta backups for Microsoft 365 and Google Workspace and scheduled restore tests. The 2.4.1.101 canary brings back the automatic updater, now a helper that verifies and installs the signed package for each OS, lets a full disk backup be restored into a raw, VHD or VHDX image, and adds an on/off switch per backup. It also fixes a scheduler that silently used UTC and a case where a vanished USB or network destination was recreated empty.
◆ Where it's heading
The canaries alternate between new restore paths and closing cases where Duplicati looked fine but wasn't, such as silent failures, wrong time zones and missing destinations. The updater makes it easier to keep desktop and server installs on the fixed versions.
◆ Prediction
Expect updater fixes in the next canaries, given that this is its first version, and the disk-image and scheduler work to move into the next stable.
Alternatives to Ably and Duplicati
Other Infra & APIs 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 Ably or Duplicati.
Payload CMS
Payload's v4 beta.9 keeps every past image crop and raises the Node floor again.
Nautobot
Nautobot 3.3 alpha 2 adds test helpers and a cable location filter after 3.2.9's token-leak fix.
Clair
Clair 4.10 RC can read SBOMs to match Java vulnerabilities.
Shuffle
Shuffle tags builds almost daily, but the notes are empty.
KrakenD
KrakenD's community edition is shipping only dependency bumps.
See all Ably alternatives → · See all Duplicati alternatives →
Recent activity from Ably and Duplicati
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoAblyAI Transport 1.0 makes Ably a resumable transport for AI chat ⚡
- 2d agoAblyJava SDK 2.1 reads and updates LiveObjects over HTTP
- 2d agoAblyJS SDK 3.1 adds channel pools and a Temporal plugin
- 4d agoAblyAbly Kafka Connector v4.2.1
- 6d agoDuplicatiDuplicati canary restores the auto-updater and VHD disk restores
- 6d agoDuplicatiDuplicati 2.4.1.101 canary binaries published
- 8d agoAblyMonthly active user (MAU) pricing ⚡
- 8d agoAblyAbly Chat React UI Kit v0.4.0
- 13d agoDuplicatiDuplicati canary closes silent-failure paths in backup and restore
- 14d agoDuplicatiDuplicati 2.4.1.100 canary binaries published
- 15d agoDuplicatiDuplicati 2.4.1 stable: SaaS delta backups and restore tests
- 15d agoDuplicatiDuplicati 2.4.1.0 stable binaries published
Frequently asked questions
What is the difference between Ably and Duplicati?
They serve adjacent needs but don't currently overlap on shipped themes. Ably is currently shipping more aggressively (velocity 7.5 vs 5.0), with 2 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 Ably better than Duplicati?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Ably is currently shipping more aggressively (velocity 7.5 vs 5.0), with 2 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.
What are the best alternatives to Ably?
Top Ably alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Ably alternatives" section above for the current picks, or visit /alternatives/ably for the full list with editorial commentary on each.
What are the best alternatives to Duplicati?
Top Duplicati alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Duplicati alternatives" section above for the current picks, or visit /alternatives/duplicati for the full list with editorial commentary on each.