Epic Online Services vs Firebase SDKs

Epic Online Services is a suite of modular online services for game developers. Its service areas cover accounts and social features, multiplayer, player and game data, and trust and safety. Social capabilities include crossplay, friends, presence, overlay, and the Epic Games account ecosystem. Multiplayer tools include peer-to-peer features, sessions, lobbies, and voice chat. Developers can use leaderboards, stats, achievements, and storage for player and title data. Trust and safety services include Easy Anti-Cheat, sanctions, player reports, and Kids Web Services. The services can be used with Unreal Engine, Unity, or a developer's chosen engine. SDKs are available for PC in C or C#, Android, and iOS; console SDKs require a request through the Developer Portal. Epic describes the service as free to use, with no royalty or hosting fees, though usage restrictions may apply. Epic says it processes game-service data to operate the services and does not share partner data without explicit authorization. Use may be throttled or suspended for violations of service restrictions.

Firebase SDKs has no write-up on Specifiction yet; its figures are above.