Source: https://seerepo.com/compare/multica-ai/multica/vs/thesysdev/openui
Markdown source: https://seerepo.com/compare/multica-ai/multica/vs/thesysdev/openui.md
Description: multica and openui share 14 technologies: React, react-native, PostHog, Tailwind CSS, Zod, TanStack, react-day-picker, react-markdown, katex, rehype-katex, remark-breaks, remark-gfm, remark-math, and unist-util-visit. multica is written in Go and openui in TypeScript.

# multica vs openui

multica and openui share 14 technologies: React, react-native, PostHog, Tailwind CSS, Zod, TanStack, react-day-picker, react-markdown, katex, rehype-katex, remark-breaks, remark-gfm, remark-math, and unist-util-visit. multica is written in Go and openui in TypeScript.

- [multica-ai/multica](https://seerepo.com/r/multica-ai/multica): Make humans and AI agents work as one team — open-source and self-hostable.
- [thesysdev/openui](https://seerepo.com/r/thesysdev/openui): The Open Standard for Generative UI

## What they share and what sets them apart

- In common: React, react-native, PostHog, Tailwind CSS, Zod, TanStack, react-day-picker, react-markdown, katex, rehype-katex, remark-breaks, remark-gfm, remark-math, unist-util-visit
- Only in multica: net/http, chi, go-redis, pgx, s3, Postgres, Redis, OpenAI, Resend, react-router-dom, Electron, @electron-toolkit/preload, Expo, expo-secure-store, Next.js, fumadocs-core, github.com/golang-jwt/jwt/v5, github.com/aws/aws-sdk-go-v2/credentials, github.com/yuin/goldmark, github.com/tdewolff/parse/v2, Prometheus, github.com/prometheus/client_model, github.com/aws/aws-sdk-go-v2, github.com/aws/aws-sdk-go-v2/config, github.com/lmittmann/tint, gopkg.in/natefinch/lumberjack.v2, fontsource-variable, sonner, dnd-kit, motion, class-variance-authority, @shikijs/themes, tailwind-merge, react-native-safe-area-context, react-native-svg, expo-image, react-native-reanimated, react-native-gesture-handler, react-native-keyboard-controller, Shopify, @react-native-community/datetimepicker, expo-status-bar, react-native-enriched-markdown, @expo/vector-icons, expo-image-picker, expo-document-picker, @shikijs/core, marked, @tailwindcss/postcss, PostCSS, yaml, next-themes, Base UI, @number-flow/react, cmdk, emoji-mart, input-otp, react-resizable-panels, recharts, rehype-sanitize, linkify-it, mdast-util-from-markdown, rehype-raw, shiki, tiptap, react-virtuoso, @floating-ui/dom, lowlight, Mermaid, react-easy-crop, hast-util-to-html, react-qr-code, @tiptap/markdown, mdast-util-gfm-table, mdast-util-math, micromark-extension-gfm-table, micromark-extension-math, remark-cjk-friendly
- Only in openui: Angular, Svelte, Vue, @assistant-ui/react, ai, Lucide, @ag-ui/core, LangChain, Inquirer, openid-client, goober, D3, Radix UI, d3-shape, d3-selection, @floating-ui/react-dom, react-syntax-highlighter, @react-email/components, eve

## Side by side

| | multica | openui |
|---|---|---|
| Size | 1,429,010 lines written, 2,695 code files | 280,786 lines written, 2,122 code files |
| Who writes it | 35.7% of its commits signed by AI. With Claude Code, Cursor, Codex, and GitHub Copilot | 20.6% of its commits signed by AI. With Claude Code, Devin, Cursor, and GitHub Copilot |
| Activity | Last push November 5, 2026, 5,414 commits, 55,017 stars | Last push November 8, 2026, 1,092 commits, 14,963 stars |
| Tests | 2,450 test files. 63.7% of its code files have a test that imports them | 155 test files. 7.4% 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, multica or openui?

multica, with 1,429,010 lines written; openui has 280,786.

The proof: [multica-ai/multica's code at commit 98846ce](https://github.com/multica-ai/multica/tree/98846ce564a6a7a0d26cb4f071263700003d3041)

### Which has more GitHub stars, multica or openui?

multica, with 55,017 stars; openui has 14,963.

The proof: [multica-ai/multica on GitHub](https://github.com/multica-ai/multica)

### Which has more tests, multica or openui?

multica, with 2,450 test files; openui has 155.

The proof: [multica-ai/multica's code at commit 98846ce](https://github.com/multica-ai/multica/tree/98846ce564a6a7a0d26cb4f071263700003d3041)

### Which was updated more recently, multica or openui?

openui: its last push was on November 8, 2026, and multica's on November 5, 2026.

The proof: [thesysdev/openui's commits on GitHub](https://github.com/thesysdev/openui/commits)

### Which has more commits signed by AI, multica or openui?

multica: an AI signed 35.7% of its commits, with Claude Code, Cursor, Codex, and GitHub Copilot; in openui, 20.6%.

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

## Sources

- multica-ai/multica: Read on November 5, 2026, at commit 98846ce (https://github.com/multica-ai/multica/tree/98846ce564a6a7a0d26cb4f071263700003d3041)
- thesysdev/openui: Read on November 8, 2026, at commit 5afae00 (https://github.com/thesysdev/openui/tree/5afae00a507e7a96144ca39e446f9af86e5f779c)

## 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.