Flux.ai is described as 'Flux is where engineers shape the future of hardware, together. Contribute to the open source community, manage your projects, review schematics like a pro, track issues and features, power your workflows, and secure work before you commit it' and is a circuit simulator in the education & reference category. There are more than 10 alternatives to Flux.ai for a variety of platforms, including Windows, Mac, Linux, Flathub and Web-based apps. The best Flux.ai alternative is KiCad, which is both free and Open Source. Other great apps like Flux.ai are Fritzing, QUCS, Autodesk EAGLE and EasyEDA.