GravityKit
GravityKit folds every GravityView extension into one Pro plugin.
Comparison · Infra & APIs
Ably vs Cursor
A side-by-side editorial comparison of Ably and Cursor — release velocity, themes, recent moves, and the top alternatives to consider.
Ably vs Cursor: at a glance
| Feature | Ably | Cursor |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 7.5 | 8.8 |
| Sparks · 30d | 2 | 2 |
| Top themes | ai transport, realtime messaging, agents, mau-billing | cloud-agents, app-hosting, voice-agents, internal-tools |
| Last editorial update | 21h ago | 5d ago |
| Website | — | — |
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 Cursor?
Cursor now builds, hosts and links internal apps, and you can talk to its agents out loud.
Cursor has grown from an editor into a delivery platform: Projects coordinates cloud agents, Origin hosts repos with an app marketplace, Rollouts watches deploys, and the Agent SDK went GA on October 20. This week a cloud agent can build a full internal app, provision Postgres, put it behind Cursor SSO and publish it at a live link. A realtime voice call, running on Grok Voice, now lets users talk to an agent while it works in the IDE, on web and on iOS.
Ably vs Cursor: 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.
Cursor
8.8INFRA · APIS
Cursor now builds, hosts and links internal apps, and you can talk to its agents out loud.
◆ Current state
Cursor has grown from an editor into a delivery platform: Projects coordinates cloud agents, Origin hosts repos with an app marketplace, Rollouts watches deploys, and the Agent SDK went GA on October 20. This week a cloud agent can build a full internal app, provision Postgres, put it behind Cursor SSO and publish it at a live link. A realtime voice call, running on Grok Voice, now lets users talk to an agent while it works in the IDE, on web and on iOS.
◆ Where it's heading
Each release widens who can use Cursor and where the work ends up. The apps launch is aimed at sales, ops, legal and finance staff, not only engineers, and it puts hosting and auth inside Cursor rather than handing off to Vercel. Voice and iOS make the agent something you supervise rather than type at.
◆ Prediction
Expect governance and billing controls for org-built apps (who can publish, which secrets they may hold, usage limits) to follow, since the launch post describes non-engineers deploying tools with database and warehouse access.
Alternatives to Ably and Cursor
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 Cursor.
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.
Recent activity from Ably and Cursor
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
- 8d agoCursorCursor adds realtime voice calls with its agents
- 8d agoAblyMonthly active user (MAU) pricing ⚡
- 8d agoAblyAbly Chat React UI Kit v0.4.0
- 9d agoCursorCursor cloud agents now build, host and share live internal apps ⚡
- 25d agoCursorCursor Agent SDK goes GA: agents as code, deployable anywhere ⚡
- 29d agoCursor# Canvases from cloud agents
- 1mo agoCursorOrigin App Marketplace opens with 20+ apps and public submissions ⚡
- 1mo agoCursor# Rollouts ⚡
Frequently asked questions
What is the difference between Ably and Cursor?
They serve adjacent needs but don't currently overlap on shipped themes. Cursor is currently shipping more aggressively (velocity 8.8 vs 7.5), with 2 editorial sparks in the last 30 days against 2. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Ably better than Cursor?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Cursor is currently shipping more aggressively (velocity 8.8 vs 7.5), with 2 editorial sparks in the last 30 days against 2. 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 Cursor?
Top Cursor alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Cursor alternatives" section above for the current picks, or visit /alternatives/cursor for the full list with editorial commentary on each.