GravityKit
GravityKit folds every GravityView extension into one Pro plugin.
Comparison · Infra & APIs
Ably vs Merge
A side-by-side editorial comparison of Ably and Merge — release velocity, themes, recent moves, and the top alternatives to consider.
Ably vs Merge: at a glance
| Feature | Ably | Merge |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 7.5 | 5.0 |
| Sparks · 30d | 2 | 0 |
| Top themes | ai transport, realtime messaging, agents, mau-billing | api-integration, llm-gateway, agent-tools, connector-catalog |
| Last editorial update | 21h ago | 3d 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 Merge?
Merge adds security and infra connectors and a half-price flex tier on its gateway.
Merge ships weekly across Agent Handler, Gateway and Unified. The latest Agent Handler batch adds AWS Redshift, CyberArk Identity, Drata, Elasticsearch, JumpCloud, MyCase, Splunk and Terraform, OAuth 2.0 for eight existing connectors, and a Registered Users tab with CSV export. Gateway adds Baseten decision models on /v1/decisions, a flex tier on Particle that bills at half every rate, and key-pinned projects that let customers tighten data-retention and region settings. Unified's UKG Ready leave-of-absence syncs now run about 30 times faster with 20 times fewer API requests.
Ably vs Merge: 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.
Merge
5.0INFRA · APIS
Merge adds security and infra connectors and a half-price flex tier on its gateway.
◆ Current state
Merge ships weekly across Agent Handler, Gateway and Unified. The latest Agent Handler batch adds AWS Redshift, CyberArk Identity, Drata, Elasticsearch, JumpCloud, MyCase, Splunk and Terraform, OAuth 2.0 for eight existing connectors, and a Registered Users tab with CSV export. Gateway adds Baseten decision models on /v1/decisions, a flex tier on Particle that bills at half every rate, and key-pinned projects that let customers tighten data-retention and region settings. Unified's UKG Ready leave-of-absence syncs now run about 30 times faster with 20 times fewer API requests.
◆ Where it's heading
Agent Handler's catalog is moving from sales and productivity apps toward security and infrastructure tools, while Gateway competes on price and on customer controls. Unified gets steady mapping and sync fixes rather than new categories.
◆ Prediction
Expect more security and infrastructure connectors in Agent Handler and further service tiers or pricing options on Gateway, given the flex tier's arrival.
Alternatives to Ably and Merge
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 Merge.
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 Merge
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 agoMergeBaseten decision models on /v1/decisions
- 8d agoMergeFaster UKG Ready leave-of-absence syncs
- 8d agoMergeSplunk, Terraform and six more connectors join Merge
- 8d agoAblyMonthly active user (MAU) pricing ⚡
- 8d agoAblyAbly Chat React UI Kit v0.4.0
- 15d agoMergeNetSuite contact sync filters and subsidiary coverage
- 15d agoMergeGPT-6.1 Terra, Gemini 4 Argon, and Mistral Large 4
- 15d agoMergeEight new connectors
Frequently asked questions
What is the difference between Ably and Merge?
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 Merge?
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 Merge?
Top Merge alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Merge alternatives" section above for the current picks, or visit /alternatives/merge-dev for the full list with editorial commentary on each.