Power reliable and feature-rich realtime chat with Ably APIs and SDKs

Put an end to flaky live chats, frustrated customers, missed KPIs, and lost revenue with our flexible APIs and SDKs.


3,000+ events per year with enhanced livestream chat and interactive, realtime features.

1 million live chats supported across 86,000 businesses and their customers.

A leading live streaming platform enabling millions of fans to chat and react together in realtime.

Deliver live chat experiences that customers love.

You and your customers want the same thing: seamless live chats that just work. Don’t let unstable networks, disconnects or traffic surges come between you. Our reliable infrastructure and flexible SDKs support a range of high-performing web and in-app chat use cases, including:

  • Customer support

  • Livestream chat

  • Realtime gaming chat

  • Team messaging

  • Custom chat experiences


Ably has built reliable chat infrastructure so you don’t have to.

Our fully managed realtime infrastructure is highly redundant and constantly available. Through active traffic management and auto-scaling, we take the stress out of delivering seamless live chat.

Scalable realtime chat with a 99.999% uptime SLA

With Ably

Our realtime chat infrastructure is highly elastic and fault tolerant, ideal for chat experiences that need to scale fast, or respond to traffic spikes.

Without Ably

Global reliability and high elasticity are time-consuming and expensive to build in-house.

Get the right messages in the right order

With Ably

Boost brand reputation through our guaranteed delivery of a consistent user experience.

Without Ably

Messages appear at the wrong time, in the wrong order, causing confusion and ruining the user experience.

Reduce the time-to-market of your live chat

With Ably

No more trade-offs: Get low costs, high quality, and a faster rollout.

Without Ably

Constant compromises between quality and time-to-market.

Reduce cost of development and delivery

With Ably

Deliver within budget and on time, with costs reduced compared to a self-build and upwards of $1M saved in the first year.

Without Ably

Unknown budget and lengthy build time pushes your costs up and revenue down.

Simple integrations, no matter the stack

With Ably

Utilize our managed integrations to connect Ably to any part of your stack, so you can quickly build and easily maintain your realtime chat experience.

Without Ably

Integrations are slow and painstaking to build, requiring manual debugging and maintenance.

Power rich web or in-app chat with our flexible building blocks

Pub/sub messaging

We ensure delivery of the right chat message to the right client in realtime. Distribute events to millions of subscribers over channels that support multiplexing with Ably’s feature-rich pub/sub APIs.

Stream resume

Deliver a seamless web or in-app chat experience with messages guaranteed to arrive in the correct order. On disconnect we keep state and retry connection every 15 seconds for two minutes.

Token-based authentication

Manage user permissions with Ably’s flexible token-based authentication options, including JWT.


Presence provides the functionality to identify and communicate about individual behavior in realtime. Use it to build rich chat features including typing indicators, online avatar stacks, and last seen information.

Message interactions

Enhance the realtime chat experience with emoji reactions and other feature-rich experiences.

Push Notifications

Deliver cross-platform push notifications with our iOS and Android SDKs.

Group chat features

Customize your chat experience to meet your business needs.

Our SDKs and APIs give you the flexibility to incorporate a wide range of features into your live chat experience - from backend processes, to frontend user enhancements:

  • Realtime customer-to-agent allocation 

  • Triage messages into one unified inbox

  • Custom role creation and management

  • Monetize with live tipping and shopping

  • Emoji reactions

  • Push notifications

  • Typing indicators

Chat marchitecture diagram

Build engaging chat experiences...not the infrastructure to power them.

Say goodbye to outages, customer complaints, and scalability issues. We handle everything from day one, meaning you can guarantee:

Quality of service: Provide a seamless experience for all of your users, regardless of where they are in the world. Our realtime infrastructure delivers unique data integrity guarantees with connection state recovery even over unreliable networks.

Reliability at scale: Surge capacity and five 9s uptime mean your live chat works seamlessly, however many users there are.

Fully customizable: Build the live chat experience you want, and enhance with additional realtime features - exactly how your business needs it.


Ably is one of the key technologies that underpins our business. Its realtime experience infrastructure seamlessly supports HubSpot's entire realtime needs, helping us to meet our technical, business, and product development requirements. With Ably, we have innovated and taken new products to market much faster while significantly reducing our operational engineering overhead.

Max FreiertProduct Group Lead, HubSpot