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Comparison · Infra & APIs

Ably vs Keycloak

A side-by-side editorial comparison of Ably and Keycloak — release velocity, themes, recent moves, and the top alternatives to consider.

Ably vs Keycloak: at a glance

FeatureAblyKeycloak
SectorInfra & APIsInfra & APIs
Velocity score7.55.0
Sparks · 30d20
Top themesai transport, realtime messaging, agents, mau-billingidentity, iam, patch-releases, lts-maintenance
Last editorial update21h ago4d 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.

Read the full Ably trajectory →

What is Keycloak?

Keycloak cuts 26.4.18 and 26.6.9 together, plus Red Hat rebuilds; the tags carry no notes.

The tracked Keycloak entries are version-set commits for two supported lines, 26.4.x and 26.6.x, cut on the same day. November brought 26.4.18 and 26.6.9 on November 4, followed by -redhat2 rebuilds of both a day or two later. The feed carries only the version bump, so the fixes inside each patch aren't visible here.

Read the full Keycloak trajectory →

Ably vs Keycloak: editorial side-by-side

A
Ably
INFRA · APIS
7.5

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.

K
Keycloak
INFRA · APIS
5.0

Keycloak cuts 26.4.18 and 26.6.9 together, plus Red Hat rebuilds; the tags carry no notes.

◆ Current state

The tracked Keycloak entries are version-set commits for two supported lines, 26.4.x and 26.6.x, cut on the same day. November brought 26.4.18 and 26.6.9 on November 4, followed by -redhat2 rebuilds of both a day or two later. The feed carries only the version bump, so the fixes inside each patch aren't visible here.

◆ Where it's heading

The two-line lockstep maintenance continues, with the gap since September suggesting skipped tags or a slower cadence. The Red Hat rebuild tags show the downstream product build tracking upstream patches within days.

◆ Prediction

Expect the next paired 26.4/26.6 patch in a few weeks; the entries give no view of feature work.

Alternatives to Ably and Keycloak

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 Keycloak.

See all Ably alternatives → · See all Keycloak alternatives →

Recent activity from Ably and Keycloak

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 1d agoAblyAI Transport 1.0 makes Ably a resumable transport for AI chat ⚡
  2. 2d agoAblyJava SDK 2.1 reads and updates LiveObjects over HTTP
  3. 2d agoAblyJS SDK 3.1 adds channel pools and a Temporal plugin
  4. 4d agoAblyAbly Kafka Connector v4.2.1
  5. 8d agoKeycloakKeycloak 26.4.18 Red Hat rebuild
  6. 8d agoAblyMonthly active user (MAU) pricing ⚡
  7. 8d agoAblyAbly Chat React UI Kit v0.4.0
  8. 8d agoKeycloakKeycloak 26.6.9 Red Hat rebuild
  9. 9d agoKeycloakKeycloak 26.6.9 patch release
  10. 9d agoKeycloakKeycloak 26.4.18 patch release
  11. 2mo agoKeycloakKeycloak 26.4.16 patch release
  12. 2mo agoKeycloakKeycloak 26.6.7 patch release

Frequently asked questions

What is the difference between Ably and Keycloak?

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 Keycloak?

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 Keycloak?

Top Keycloak alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Keycloak alternatives" section above for the current picks, or visit /alternatives/keycloak for the full list with editorial commentary on each.