Fly.io
Best for
Run containers close to users globally — best for latency-sensitive agent APIs and real-time agent interactions
Limitations
Steeper learning curve than Railway; pricing can be unpredictable with auto-scaling; smaller community; documentation is sometimes sparse
Features
Frameworks
SDK Languages
Compliance
Fly.io
Fly.io runs containers on hardware in cities around the world. It's designed for apps that need to be close to users — deploy a container image and Fly distributes it to the regions you specify.
For agent developers building real-time interfaces (chat, voice, streaming), Fly's global distribution reduces latency between the user and the agent backend. It supports any language and runtime via Docker, with first-class support for Elixir, Go, and Python. The tradeoff is a steeper setup curve compared to platforms like Railway or Vercel.