Pick Perplexity Comet if
people who already use Perplexity Search and want the same assistant inside the browser.
Read the Perplexity Comet pagePerplexity Comet vs SigmaOS
Our take
Pick Perplexity Comet if people who already use Perplexity Search and want the same assistant inside the browser. 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, then Personal Pro at $20/month when they need unlimited Advanced Airis — not Personal Max $30 unless they need more LLM models and
Best for
Perplexity Comet Browse with Perplexity in the chrome
SigmaOS A workspace browser you start at a public $
Free plan
Perplexity Comet $0 · free to download worldwide (Oct 2, 2025 launch post)
SigmaOS $0 · forever. FAQ: “SigmaOS Personal is free for everyone and anyone, forever.” Card: unlimited workspaces, fast ad-blocker, Airis Assistant (limited)
Lowest paid
Perplexity Comet Comet Plus $5/mo
SigmaOS Personal Pro $20/mo
Next step up
Perplexity Comet Perplexity Pro $17/mo yearly
SigmaOS Personal Max $30/mo
Watch out
Perplexity Comet Comet Plus is news access, not more assistant IQ
SigmaOS Unlimited Airis is paid
Last checked
Perplexity Comet 2026-10-22 · perplexity.ai/pro
SigmaOS 2026-10-23 · sigmaos.com
Which one, then?
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, 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