What are the best Realtime Backend / API Tools?

Firebase, Socket.IO, Pusher, SignalR, and ws are the most popular tools in the category "Realtime Backend / API". "Realtime backend made easy" is the primary reason developers pick Firebase over its competitors, while "Real-time" is the reason why Socket.IO was chosen.


Firebase
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Socket.IO
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ws
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Pusher
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Google Cloud Pub/Sub
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SignalR
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NATS
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Supabase
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PubNub
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WCF
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Nchan
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Ably
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SocketCluster
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deepstream.io
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PlayFab
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Gun
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SurrealDB
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Back4App
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8base
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Faye
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PocketBase
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Xano
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Horizon
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CometD
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Aspose
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Backendless
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uWebSockets
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Nhost
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Pushpin
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LeanCloud
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