Felgo vs Flax Engine

Felgo is a native cross-platform SDK based on Qt for building applications, games and embedded software. Developers mainly use QML and JavaScript, with C++ also supported. Felgo Live updates QML and JavaScript on connected devices after a save, without waiting for build and deployment steps. The Game Engine focuses on 2D casual games and includes Box2D physics, particles, multi-touch and animations. Felgo Apps can use device features such as cameras, sensors and file systems, alongside networking options including WebSockets, Bluetooth LE and NFC. Browser-based Cloud Builds can build and deploy projects from Felgo Cloud IDE. Game Network offers achievements, leaderboards, challenges, cloud storage and offline support. Listed targets include Android, iOS, Windows, macOS, Linux and web. Personal has an annual turnover limit under €50k. Startup costs €79 a month, billed annually per developer, and has a turnover limit under €100k. Business costs €245 a month, billed annually, and has no annual turnover limit. Felgo offers a free plan and a free trial.

Flax Engine is a 3D game engine written in C++ and C#, with visual scripting and full Editor source code available. It supports C++, C#, and visual scripting, with hot-reloading for both programming languages in the Editor. Rendering features include real-time global illumination, reflections using custom software ray tracing, and GPU lightmap baking. World-building tools cover terrain, foliage, fog, nested prefabs, level streaming, and large-world 64-bit coordinates. Multiplayer projects can use low- and high-level networking APIs. Its Online system supports services such as Steam, Xbox Live, and PlayStation Network for profiles, friends, achievements, presence, and cloud saves. Supported targets include Windows, Linux, Android, iOS, macOS, web, PlayStation 4 and 5, Xbox One and Series, and Nintendo Switch. Web support is experimental and lacks C# scripting, video playback, and some other engine features. NDA-protected platform support is excluded from the public repository. The engine is free for non-commercial or educational use; commercial releases pay a 4% royalty on earnings exceeding $250,000 per calendar quarter.