Action Cable
Action Cable: A focused, open-source WebSocket framework for adding real-time features to Rails apps. Ranked #6 of 55 in WebSocket Tools by our editors (8.3/10); pricing: Free plan; best for ruby on Rails applications.
At a glance
- Editor score8.3 / 10
- PricingFree plan
- Best forRuby on Rails applications
- Free planYes
- Paid fromNone
- Deployment modelLibrary
- Facts checked28 Sep 2026
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
Our verdict on Action Cable
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 alongside a client-side JavaScript consumer framework. Its channel subscriptions, lifecycle callbacks, streams, and broadcasts provide the core pieces for coordinating persistent connections and delivering messages to clients. As open-source software maintained in the Rails repository, it suits applications already built around Rails more naturally than projects seeking a general-purpose WebSocket service.
Its strongest fit is the Rails ecosystem. Applications can run the cable server inside Rails or as a standalone Rack server, and subscription adapters include Async, Solid Cable, Redis, and PostgreSQL. That gives teams several ways to connect pub/sub behavior to their application setup, including Active Record-backed Solid Cable. Authentication and authorization hooks are part of the feature set, so access control can be incorporated around channel connections and subscriptions. The tradeoff is scope: the coordinated Ruby and JavaScript components are useful for Rails-oriented work, but less applicable to teams using unrelated server frameworks or client stacks.
Action Cable is open source and self-hosted, so there is no paid-plan ladder to weigh; teams take responsibility for operating it within their own application or as a standalone server. Documentation and community are its listed support channels. That model can suit small through enterprise teams that want Rails-integrated control over real-time infrastructure, but it is not a managed hosting option for organizations looking to outsource operation. Choose it when a Rails application needs WebSocket channels and adapter choice; consider a different tool if broad language support or managed service operation is central to the decision.
Action Cable pricing
Action Cable fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Deployment model | Library |
| Free concurrent connections | Not verified |
| Pub/sub messaging | Yes |
| Self-hosting available | Yes |
| Client SDKs | JavaScript, Ruby |
| Protocol support | WebSockets |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Docs, Community |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 3 integrations: Redis, PostgreSQL, Solid Cable (Active Record) |
| Pricing | Free plan |
| Website | guides.rubyonrails.org |
| Facts checked | 28 Sep 2026 |
Action Cable integrations
Action Cable lists 3 integrations on its own site.
- Redis
- PostgreSQL
- Solid Cable (Active Record)
Alternatives to Action Cable
- Socket.IOAn open-source library for real-time apps, with transport fallback and reconnection built in.9.3
- Ably Pub/SubFeature-rich managed pub/sub, with a free tier and paid plans from $29/month.8.8
- Azure Web PubSubA managed Azure service for real-time apps that need WebSockets, pub-sub, and scale.8.7
See all Action Cable alternatives →
Action Cable vs the competition
- Action Cable vs Socket.IO
- Action Cable vs Ably Pub/Sub
- Action Cable vs Azure Web PubSub
- Action Cable vs Fastly Fanout
- Action Cable vs Pusher Channels
- Action Cable vs Spring WebSocket
Compare Action Cable with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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