SmartFoxServer
7.5#5 in game networking middlewareFrom €32.50 a monthFree planAndroidiOSWebAPI
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It suits developers building multiplayer games or other multiuser services who need server-side extensions, analytics, and database connectivity. The free edition may suit projects with up to 100 concurrent users that can display the required notice.
Unity suits game and app developers working across supported platforms, including teams building multiplayer or immersive experiences. Plan choice depends on application type and the stated revenue or funding thresholds.