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Head-to-head · WebSocket Tools

Ably Pub/Sub vs Action Cable

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Ably Pub/Sub #2 in WebSocket Tools 8.8/10 Free plan · paid from $29/mo Free plan✓ 1 of 2 features Visit Ably
Action Cable #6 in WebSocket Tools 8.3/10 Free plan Free plan✓ 2 of 2 features Visit Ruby on Rails

Ably Pub/Sub leads on 0 checks, Action Cable on 1, and 2 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAbly Pub/Sub · 8.8/10
  • Free planboth
  • Most featuresAction Cable · 2 of 2

Ably Pub/Sub scores higher on our rubric for websocket tools: 8.8 against 8.3 out of 10; our editors rank them #2 and #6.

On deployment model, Action Cable gives you Library where Ably Pub/Sub offers Managed. Action Cable offers self-hosting available; Ably Pub/Sub doesn't.

Ably Pub/Sub is the better fit for teams building managed, feature-rich pub/sub. Action Cable is the better fit for ruby on Rails applications.

  • Ably Pub/Sub fits best

    Teams building managed, feature-rich pub/sub

  • Action Cable fits best

    Ruby on Rails applications

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature Ably Pub/Sub 8.8/10 Visit ↗ Action Cable 8.3/10 Visit ↗
At a glance
Editor score 8.8 8.3
Ranking #2 in WebSocket Tools #6 in WebSocket Tools
Best for Teams building managed, feature-rich pub/sub Ruby on Rails applications
Pricing model Free plan + paid Free
Starting price $29/mo Not published
Free plan ✓ ✓
Free trial — —
Deployment Cloud Self-hosted
Platforms Web, iOS, Android Web
Support Email, Community · 24/7 Docs, Community
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Ably Pub/Sub 1/2 · Action Cable 2/2
Pub/sub messaging ✓ ✓
Self-hosting available — ✓ (best)
Specs
Deployment model Managed Library
Free concurrent connections 200 Not published
Client SDKs JavaScript, Java, Python, React, React Native, C#.NET, Go, Node.js, Ruby, Swift, Objective-C, Flutter, PHP, PHP Laravel, Android, Kotlin, Unity, Xamarin, NativeScript, Cordova, Clojure, Scala JavaScript, Ruby
Protocol support WebSockets, HTTP REST, MQTT, SSE, HTTP streaming, AMQP, STOMP, Pusher, PubNub WebSockets
Our review
Pros
  • Presence, history, persistence, recovery, replay, and ordering
  • Protocol adapters include MQTT, SSE, AMQP, STOMP, Pusher, and PubNub
  • Broad SDK coverage across web, mobile, and server languages
  • Coordinates server-side Ruby channels with a JavaScript consumer framework
  • Supports channel lifecycle callbacks, streams, broadcasts, and client rebroadcasts
  • Offers Async, Solid Cable, Redis, and PostgreSQL subscription adapters
Cons
  • Usage charges apply on paid plans in addition to package prices
  • Cloud-only deployment; self-hosting is not supported
  • Enterprise pricing is custom
  • Its Ruby and JavaScript focus makes it less suited to other application stacks
  • Requires self-hosted deployment rather than a managed service
  • Support is through documentation and community channels
Our verdict

Ably Pub/Sub provides APIs and client SDKs for real-time applications that publish and subscribe to messages on channels. It is aimed at teams that want managed infrastructure for broadcasting updates to connected clients, tracking…

Read the review →

Action Cable brings WebSocket connections and publish/subscribe messaging into Ruby on Rails applications. It is aimed at teams building real-time features such as chat, notifications, or presence, with server-side Ruby channels working…

Read the review →
  1. Ably Pub/SubWebSocket Tools 8.8Free plan · paid from $29/mo
  2. Action CableWebSocket Tools 8.3Free plan

Strengths and trade-offs

  • Ably Pub/Sub — where it wins

    • Presence, history, persistence, recovery, replay, and ordering
    • Protocol adapters include MQTT, SSE, AMQP, STOMP, Pusher, and PubNub
    • Broad SDK coverage across web, mobile, and server languages

    Where it doesn't

    • Usage charges apply on paid plans in addition to package prices
    • Cloud-only deployment; self-hosting is not supported
    • Enterprise pricing is custom

  • Action Cable — where it wins

    • Coordinates server-side Ruby channels with a JavaScript consumer framework
    • Supports channel lifecycle callbacks, streams, broadcasts, and client rebroadcasts
    • Offers Async, Solid Cable, Redis, and PostgreSQL subscription adapters

    Where it doesn't

    • Its Ruby and JavaScript focus makes it less suited to other application stacks
    • Requires self-hosted deployment rather than a managed service
    • Support is through documentation and community channels
  • Ably Pub/Sub8.8/10 · Free plan · paid from $29/mo

    Feature-rich managed pub/sub, with a free tier and paid plans from $29/month.

    Visit AblyFull verdict →
  • Action Cable8.3/10 · Free plan

    A focused, open-source WebSocket framework for adding real-time features to Rails apps.

    Visit Ruby on RailsFull verdict →

More comparisons

All WebSocket tools comparisons → · Full ranking →

Guides on WebSocket tools

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update