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Ably FAQs
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  • Migrating to Ably from an existing service
    • Migrating from PubNub
    • Migrating from Pusher
    • Migrating from Socket.io
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      1. Ably FAQs
      2. General
      • Account billing and packages
        • Committed Use
        • SLA & Uptime Guarantees
      • General
        • FAQ
        • Contacting us
        • Architectural Advice
      • Realtime API and client libraries
        • Platform support
        • Connections
        • Common issues
        • Authentication
      • Troubleshooting
        • Device support
        • Development tools
        • SDK
      • Channels
        • Messages
        • Subscribing and publishing
        • Presence
        • Namespaces and naming
        • General
        • History
        • Occupancy
        • Metadata and statistics
      • REST API and client libraries
        • Usage
        • Common issues
      • Ably error codes
        • General
        • Client errors
        • Server errors
        • Integration Errors
        • Connection Errors
        • Channel Errors
        • Spaces errors
        • Control API errors
        • Other
        • Push notification errors
      • Account and app setup and configuration
        • Accounts and apps
        • Keys and tokens
        • User management
        • Account maintenance
      • Ably architecture, transports, and security
        • Transports and connections
        • Security
        • Protocol support and protocol adapters
        • Data centres
        • Ably architecture design
      • Performance and Redundancy
        • Redundancy & reliability
        • Performance
      • Push Notifications
        • Setup
        • Common questions
        • Troubleshooting
      • Integrations
        • Events, Webhooks and Functions
        • Message Queues
        • Firehose
        • Datadog
      • Migrating to Ably from an existing service
        • Migrating from PubNub
        • Migrating from Pusher
        • Migrating from Socket.io

      General

      Details on getting started and common questions

      FAQ

      • How can I set up different environments in Ably?
      • Is there a limit to the length of the ClientId or Channel name?
      • Should I use the REST or Realtime library?
      • How can I subscribe to messages using REST only SDKs?
      • CSP Rejection to internet-up.ably-realtime.com/is-the-internet-up.txt
      • Can I use Ably for audio and video streaming or images and file sharing?
      • Is there any guarantee that messages received from the history API will be in order?
      • Are the Message and Data Transfer Limits Enforced Separately?
      • Are you HIPAA compliant?
      • Do you have a Disaster Recovery plan?
      • Should I reduce the REST publish timeout?
      • Do you have a terms of service?
      • Can I see the status of the Ably service globally?
      • I've seen a spike in my channel or connection usage that I wasn't expecting
      • Can I use Ably with a state manager (eg Redux)?
      • How can I add an AI moderation service to a chat built with Ably
      See more

      Contacting us

      • Guide: Information we need to help you diagnose problems

      Architectural Advice

      • How can I alert a user to subscribe to a channel?
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