Our take
Pick Nimbus if people who want Claude Code’s chat-plus-log UX on the web, will claim a founding spot at $0, and will paste their own Gemini / OpenAI / Anthropic key — not teams that need a billed Nimbus seat (none is printed) or a Chrome extension. Pick SigmaOS if mac users who will stay on Personal Free forever at $0 (unlimited workspaces, ad-blocker, limited Airis) while they open a first IcelandOffsite workspace,
Best for
Nimbus A browser whose primary chrome is the agent log
SigmaOS A workspace browser you start at a public $
Free plan
Nimbus $0 · forever, while the homepage still prints the cap. Soft-note: founding form + “Claim my spot” on the same page
SigmaOS $0 · forever. FAQ: “SigmaOS Personal is free for everyone and anyone, forever.” Card: unlimited workspaces, fast ad-blocker, Airis Assistant (limited)
Lowest paid
Nimbus Not published by the vendor
SigmaOS Personal Pro $20/mo
Next step up
Nimbus
SigmaOS Personal Max $30/mo
Coding agent
Nimbus Claude Code
SigmaOS
Runs where
Nimbus Hosted
SigmaOS
Watch out
Nimbus Founding free is capped at 500
SigmaOS Unlimited Airis is paid
Last checked
Nimbus 2026-10-23 · producthunt.com/products/nimbus-10
SigmaOS 2026-10-23 · sigmaos.com
people who want Claude Code’s chat-plus-log UX on the web, will claim a founding spot at $0, and will paste their own Gemini / OpenAI / Anthropic key — not teams that need a billed Nimbus seat (none is printed) or a Chrome extension.
Read the Nimbus pagemac users who will stay on Personal Free forever at $0 (unlimited workspaces, ad-blocker, limited Airis) while they open a first IcelandOffsite workspace, then Personal Pro at $20/month when they need unlimited Advanced Airis — not Personal Max $30 unless they need more LLM models and unlimited Look it up / Interactive Summaries. Students and educators print 50% off Pro.
Read the SigmaOS page
