{"name":"COSS UI (formerly Origin UI)","tagline":"Open-source copy-paste React components, evolved from Origin UI.","url":"https://coss.com/ui","category":"design","pricing":"free","price_note":"free and open source","free_tier":true,"open_source":true,"api":false,"self_host":false,"verdict":"situational","verdict_text":"Origin UI has moved into COSS UI after its acquisition by Cal.com. The new library remains a polished shadcn-compatible alternative with a distinct visual style, but the migration is still in progress.","limitations":["Smaller ecosystem than shadcn/ui.","Original Origin UI components are now legacy and receive limited support.","The COSS UI roadmap is still in an active migration phase.","Style is opinionated; may not fit every brand."],"strengths":["Polished shadcn-compatible alternative with a distinct visual style.","Free and open source after the Cal.com acquisition.","Components remain usable while the COSS UI migration proceeds."],"use_for":["Teams that want a shadcn alternative with a different visual direction.","Projects that can tolerate a migration-phase component library."],"skip_when":["You need the ecosystem maturity and community of shadcn/ui today.","The opinionated style does not match the brand you are building.","You cannot accept roadmap uncertainty during the COSS UI migration."],"receipts":["https://coss.com/ui/docs/roadmap","https://github.com/cosscom/coss"],"affiliate":"none","evidence_tier":"source-verified","momentum":"blueshift","featured":false,"last_verified":"2026-08-19","observed_by":"whysanesanders","slug":"origin-ui","canonical_url":"https://noemium.com/tools/origin-ui/","attribution":"Noemium catalog data is licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). See https://noemium.com/method/ for how entries are verified."}