Source: https://seerepo.com/compare/cosscom/ui/vs/QuantumNous/new-api
Markdown source: https://seerepo.com/compare/cosscom/ui/vs/QuantumNous/new-api.md
Description: ui and new-api share 15 technologies: React, Tailwind CSS, class-variance-authority, tailwind-merge, react-day-picker, input-otp, sonner, cmdk, react-resizable-panels, Lucide, shiki, Zod, Base UI, motion, and hugeicons. ui is written in TypeScript and new-api in Go.

# ui vs new-api

ui and new-api share 15 technologies: React, Tailwind CSS, class-variance-authority, tailwind-merge, react-day-picker, input-otp, sonner, cmdk, react-resizable-panels, Lucide, shiki, Zod, Base UI, motion, and hugeicons. ui is written in TypeScript and new-api in Go.

- [cosscom/ui](https://seerepo.com/r/cosscom/ui): coss.com/ui is the official design system of Cal.com
- [QuantumNous/new-api](https://seerepo.com/r/QuantumNous/new-api): Open-source AI gateway. Self-hosted LLM gateway with OpenAI-, Claude- and Gemini-compatible APIs, model routing, access control, usage tracking and cost accounting.

## What they share and what sets them apart

- In common: React, Tailwind CSS, class-variance-authority, tailwind-merge, react-day-picker, input-otp, sonner, cmdk, react-resizable-panels, Lucide, shiki, Zod, Base UI, motion, hugeicons
- Only in ui: Next.js, fumadocs-core, next-themes, Radix UI, react-aria-components, headless-tree, TanStack, react-payment-inputs, shadcn, dnd-kit, emblor, react-aria, use-mask-input, react-phone-number-input, @remixicon/react, hast-util-to-jsx-runtime, @daypicker/react, @shikijs/transformers
- Only in new-api: Gin, pgx, Redis, github.com/samber/hot, ClickHouse, MySQL, Postgres, github.com/glebarez/go-sqlite, github.com/glebarez/sqlite, Stripe, github.com/MoeForge/moejs, github.com/gin-contrib/static, Electron, tanstack, gorm.io/gorm, gorm.io/driver/clickhouse, github.com/go-webauthn/webauthn, github.com/casbin/casbin/v2, github.com/golang-jwt/jwt/v5, github.com/aws/aws-sdk-go-v2/credentials, github.com/Azure/go-ntlmssp, github.com/coreos/go-oidc/v3, github.com/pquerna/otp, golang.org/x/oauth2, openai-go, relaykit, tokenkit, github.com/aws/aws-sdk-go-v2/service/bedrockruntime, github.com/tiktoken-go/tokenizer, golang.org/x/image, github.com/abema/go-mp4, github.com/go-audio/aiff, github.com/go-audio/wav, github.com/jfreymuth/oggvorbis, github.com/ledongthuc/pdf, github.com/mewkiz/flac, github.com/tcolgate/mp3, github.com/yapingcat/gomedia, github.com/go-playground/validator/v10, github.com/aws/aws-sdk-go-v2, github.com/grafana/pyroscope-go, Prometheus, React Hook Form, @tanstack/react-table, visactor, xyflow, CodeMirror, @lezer/highlight, yace, auto-skeleton-react, embla-carousel-react, react-top-loading-bar, recharts, use-stick-to-bottom, vaul, @lobehub/icons, react-icons, ai, tokenlens, stream-markdown-parser, marked, dompurify, katex, qrcode.react, yaml, @hookform/resolvers

## Side by side

| | ui | new-api |
|---|---|---|
| Size | 160,398 lines written, 1,547 code files | 639,527 lines written, 2,070 code files |
| Who writes it | 6.2% of its commits signed by AI. With Devin, Cursor, and Claude Code | 0.7% of its commits signed by AI. With Claude Code, CodeRabbit, Codex, Jules, and Cursor |
| Activity | Last push November 9, 2026, 1,057 commits, 10,841 stars | Last push November 13, 2026, 5,444 commits, 51,856 stars |
| Tests | 9 test files. 0.6% of its code files have a test that imports them | 571 test files. 41.4% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, ui or new-api?

new-api, with 639,527 lines written; ui has 160,398.

The proof: [QuantumNous/new-api's code at commit b20e056](https://github.com/QuantumNous/new-api/tree/b20e0566b235716383da42450c6c536689de9b43)

### Which has more GitHub stars, ui or new-api?

new-api, with 51,856 stars; ui has 10,841.

The proof: [QuantumNous/new-api on GitHub](https://github.com/QuantumNous/new-api)

### Which has more tests, ui or new-api?

new-api, with 571 test files; ui has 9.

The proof: [QuantumNous/new-api's code at commit b20e056](https://github.com/QuantumNous/new-api/tree/b20e0566b235716383da42450c6c536689de9b43)

### Which was updated more recently, ui or new-api?

new-api: its last push was on November 13, 2026, and ui's on November 9, 2026.

The proof: [QuantumNous/new-api's commits on GitHub](https://github.com/QuantumNous/new-api/commits)

### Which has more commits signed by AI, ui or new-api?

ui: an AI signed 6.2% of its commits, with Devin, Cursor, and Claude Code; in new-api, 0.7%.

The proof: [the commits each tool signed in cosscom/ui](https://seerepo.com/r/cosscom/ui/ai)

## Sources

- cosscom/ui: Read on November 13, 2026, at commit fe6ffa8 (https://github.com/cosscom/ui/tree/fe6ffa81f434a4afe1c01564c13bb237564c42e2)
- QuantumNous/new-api: Read on November 13, 2026, at commit b20e056 (https://github.com/QuantumNous/new-api/tree/b20e0566b235716383da42450c6c536689de9b43)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.