Power engaging virtual events for millions of attendees from all over the world

Captivate participants and empower organizers with interactive realtime features that you can rely on in a world where digital live events are in great demand.


Digital platform & event framework for virtual meetings, conferences, and live events with engaging features like polls, Q&As, and gamification.

Initiates millions of VoIP calls and enables interactive events and webinars for large organizations around the world.

A virtual venue for creating online events of any type and size, with numerous audience engagement features.

Easily build engaging realtime features that delight participants and will make your virtual event memorable

  • Chat and VoIP. Add chat and voice calling to your apps to power realtime interactions among event participants and hosts.

  • Multi-user spaces. Build virtual spaces such as meeting & breakout rooms to boost engagement and bring attendees closer together.

  • Polls, quizzes, and Q&As. Keep your users engaged and entertained with live polls, quizzes, and Q&As.

  • Gamification & live reactions. Increase engagement by using gamification with realtime results & leaderboards, and enable users to express themselves via live reactions.

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Our realtime engagement platform requires instant audience feedback at scale. Ably seamlessly absorbs sudden bursts in load during unexpected client events. The integration was easy and we were live in under a month.

Johan BengtssonCTO, Mentimeter

Robust realtime communication stack to build captivating and engaging virtual experiences at scale

Pub/Sub messaging

Publish messages to millions of subscribers over channels that support multiplexing.

Device & user presence

Know when devices or users are online by subscribing to presence events.

Message history

Retrieve previously published messages and historical presence events.

Stream resume

On disconnect we keep connection state and attempt reconnection every 15 seconds for two minutes.

Message ordering

Ably guarantees all messages are delivered in the same order as originally published.

Flexible security

Authenticate clients directly using API keys or use secure Ably or JWT tokens for users.


Ably supports pub/sub over WebSockets, MQTT, and Server-Sent Events (SSE).


Trigger business logic (e.g. AWS Lambda) or process data elsewhere (e.g. RabbitMQ).

Push Notifications

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

Create dependable realtime experiences at scale

Ably was built from the ground-up to be the trusted infrastructure that supports complex, business-critical, realtime experiences in fast-growing scenarios. Our mathematically modelled approach to system design ensures critical functionality at scale and provides unmatched quality of service guarantees, enabling you to create dependable digital experiences that will delight your end-users.

Ably’s Four Pillars of Dependability


We focus on predictability of latencies, and we guarantee <65 ms round trip latency for 99th percentile. We also provide unlimited channel throughput.


Message ordering, guaranteed delivery, and exactly-once semantics are built-in, from the moment a message is published to Ably, all the way to its delivery to consumers.


Fault tolerance at regional and global levels to guarantee continuity of service even in the case of multiple infrastructure failures. 99.999999% message survivability.


Ably is meticulously designed for high availability and extreme scale. We ensure 50% capacity margin for instant surges, and provide a 99.999% uptime SLA.

Learn more about our:

Ably set a new gold standard for the type of service we expect from third parties...

David PennarVP Engineering