The deciding difference is operational: Centaur can run on infrastructure you control, Modal cannot. If that constraint is real for you, it settles the choice before anything else is considered.
Python-native serverless with GPUs and sandboxes, scale to zero.
Paradigm's self-hosted control plane: one shared team agent, an isolated k8s sandbox per Slack thread, and no raw API keys in the agent's environment.
Brings your own harness — it runs Claude Code, Codex or Amp inside the sandbox rather than replacing them. Credential boundaries mean the agent calls approved services without ever holding the key.
| Modal | Centaur | |
|---|---|---|
| Licence | Proprietary | Open source |
| Pricing | freemium | open source |
| Self-hostable | No | Yes |
| Languages | Python | Any language |
| Install | pip install modal | — |
| Keys required | MODAL_TOKEN_ID, MODAL_TOKEN_SECRET | None |
The deciding difference is operational: Centaur can run on infrastructure you control, Modal cannot. If that constraint is real for you, it settles the choice before anything else is considered. Modal: Python-native serverless with GPUs and sandboxes, scale to zero. Centaur: Paradigm's self-hosted control plane: one shared team agent, an isolated k8s sandbox per Slack thread, and no raw API keys in the agent's environment.
Modal is a hosted service only. Centaur can run on your own infrastructure.
Modal is proprietary (freemium). Centaur is open source (open source).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/modal-vs-centaur