Source: https://seerepo.com/r/marimo-team/marimo/built Markdown source: https://seerepo.com/r/marimo-team/marimo/built.md Description: marimo is a Python repo built with FastAPI, starlette, uvicorn, React, and Vite. It uses AI through ai and @ai-sdk/react. # What is marimo built with? marimo is a Python repo built with FastAPI, starlette, uvicorn, React, and Vite. It uses AI through ai and @ai-sdk/react, makes its content with markdown, marked, dompurify, html-to-image, katex, and 3 more, validates its data with msgspec, jsonschema, @hookform/resolvers, and Zod, is tested with pytest-asyncio, Pytest, Vitest, Testing Library, @playwright/test, and 1 more, and deploys with psutil. It has 907,947 written lines, with 1,461 test files. Read on November 4, 2026, at commit b62dfd4. Repository: https://github.com/marimo-team/marimo ## Backend (/) ### The base - **[FastAPI](https://seerepo.com/uses/fastapi)** ## Support (/) ### The base - **starlette**: 58 files - **[uvicorn](https://seerepo.com/uses/uvicorn)**: 7 files ### Content - **markdown**: 7 files ### Validation - **msgspec**: 85 files - **jsonschema**: 1 file ### Testing - **pytest-asyncio** - **Pytest**: 484 files ### Deploy - **[psutil](https://seerepo.com/uses/psutil)**: 11 files ### Tools - **click**: 23 files - **jedi**: 3 files - **pygments**: 1 file ### Other - **",** - **and** - **pyyaml** - **s** - **tomlkit**: 5 files - **pyodide**: 2 files - **httpx**: 1 file ## Frontend (frontend) ### The base - **[React](https://seerepo.com/uses/react)**: 470 files - **[Vite](https://seerepo.com/uses/vite)**: 2 files ### Styles - **[Tailwind CSS](https://seerepo.com/uses/tailwind-css)** - **[class-variance-authority](https://seerepo.com/uses/class-variance-authority)**: 22 files - **@radix-ui/colors**: 2 files - **PostCSS**: 1 file - **[tailwind-merge](https://seerepo.com/uses/tailwind-merge)**: 1 file ### Interface - **[CodeMirror](https://seerepo.com/uses/codemirror)**: 104 files - **[TanStack](https://seerepo.com/uses/tanstack)**: 49 files - **[Radix UI](https://seerepo.com/uses/radix-ui)**: 42 files - **[React Hook Form](https://seerepo.com/uses/react-hook-form)**: 21 files - **vega-lite**: 16 files - **@uiw/react-codemirror**: 12 files - **react-aria-components**: 12 files - **@marimo-team/codemirror-languageserver**: 9 files - **react-arborist**: 9 files - **react-resizable-panels**: 9 files - **reactflow**: 9 files - **@uidotdev/usehooks**: 7 files - **dnd-kit**: 7 files - **@lezer/highlight**: 5 files - **[cmdk](https://seerepo.com/uses/cmdk)**: 5 files - **@replit/codemirror-vim**: 3 files - **react-dropzone**: 3 files - **react-dnd**: 2 files - **react-error-boundary**: 2 files - **Swiper**: 2 files - **@dagrejs/dagre**: 1 file - **dnd-core**: 1 file - **[Mermaid](https://seerepo.com/uses/mermaid)**: 1 file - **react-dnd-html5-backend**: 1 file - **react-grid-layout**: 1 file - **react-virtuoso**: 1 file - **Vega**: 1 file - **[xterm](https://seerepo.com/uses/xterm)**: 1 file ### Icons - **[Lucide](https://seerepo.com/uses/lucide)**: 227 files - **@radix-ui/react-icons**: 7 files ## Backend (frontend) ### AI - **[ai](https://seerepo.com/uses/ai)**: 21 files - **@ai-sdk/react**: 6 files ## Support (frontend) ### Content - **marked**: 2 files - **[dompurify](https://seerepo.com/uses/dompurify)**: 1 file - **html-to-image**: 1 file - **katex**: 1 file - **rehype-sanitize**: 1 file - **streamdown**: 1 file - **[yaml](https://seerepo.com/uses/yaml)**: 1 file ### Validation - **@hookform/resolvers**: 6 files ### Testing - **Vitest**: 573 files - **Testing Library**: 202 files - **@playwright/test**: 25 files - **msw**: 1 file ### Tools - **vscode-languageserver-protocol**: 7 files - **@vitejs/plugin-react**: 1 file - **sql-formatter**: 1 file - **Storybook**: 1 file ### Other - **jotai**: 239 files - **Lodash**: 14 files - **pyodide**: 9 files - **@lezer/common**: 8 files - **@internationalized/date**: 5 files - **clsx**: 5 files - **date-fns**: 5 files - **@paralleldrive/cuid2**: 2 files - **lz-string**: 2 files - **humanize-duration**: 1 file - **jotai-scope**: 1 file - **path-to-regexp**: 1 file - **web-vitals**: 1 file ## Support (packages/client) ### Validation - **[Zod](https://seerepo.com/uses/zod)**: 3 files ### Testing - **Vitest**: 10 files ## Support (packages/llm-info) ### Content - **[yaml](https://seerepo.com/uses/yaml)**: 2 files ### Validation - **[Zod](https://seerepo.com/uses/zod)**: 3 files ### Testing - **Vitest**: 5 files ## Support (packages/lsp) ### Testing - **Vitest**: 2 files ### Other - **minimist**: 1 file - **ws**: 1 file ## Support (packages/openapi) ### Tools - **openapi-typescript**: 1 file - **TypeScript**: 1 file ### Other - **openapi-fetch**: 1 file ## Frontend (packages/smart-cells) ### Interface - **@codemirror/lang-python**: 1 file ## Support (packages/smart-cells) ### Testing - **Vitest**: 5 files ### Other - **@lezer/common**: 2 files ## Other repos with a similar stack - [supabase/supabase](https://seerepo.com/r/supabase/supabase/built): React, Vite, Tailwind CSS, class-variance-authority, Radix UI, React Hook Form, react-resizable-panels, @uidotdev/usehooks, dnd-kit, cmdk, react-dropzone, react-error-boundary, @dagrejs/dagre, Mermaid, Lucide, ai, @ai-sdk/react, html-to-image, streamdown, @hookform/resolvers, Zod · [Compare](https://seerepo.com/compare/marimo-team/marimo/vs/supabase/supabase) - [paperclipai/paperclip](https://seerepo.com/r/paperclipai/paperclip/built): React, Vite, jsonschema, Tailwind CSS, class-variance-authority, tailwind-merge, CodeMirror, Radix UI, react-resizable-panels, dnd-kit, @lezer/highlight, cmdk, Mermaid, xterm, Lucide, ai, dompurify, yaml, Zod · [Compare](https://seerepo.com/compare/marimo-team/marimo/vs/paperclipai/paperclip) - [NousResearch/hermes-agent](https://seerepo.com/r/NousResearch/hermes-agent/built): FastAPI, React, Vite, Tailwind CSS, class-variance-authority, tailwind-merge, CodeMirror, Radix UI, dnd-kit, cmdk, react-dnd-html5-backend, xterm, Lucide, dompurify, katex, streamdown, yaml, Zod · [Compare](https://seerepo.com/compare/marimo-team/marimo/vs/NousResearch/hermes-agent) - [langflow-ai/langflow](https://seerepo.com/r/langflow-ai/langflow/built): FastAPI, uvicorn, React, Vite, msgspec, jsonschema, psutil, Tailwind CSS, class-variance-authority, tailwind-merge, Radix UI, reactflow, cmdk, react-error-boundary, Lucide, @radix-ui/react-icons, dompurify, rehype-sanitize · [Compare](https://seerepo.com/compare/langflow-ai/langflow/vs/marimo-team/marimo) - [Significant-Gravitas/AutoGPT](https://seerepo.com/r/Significant-Gravitas/AutoGPT/built): FastAPI, uvicorn, React, jsonschema, psutil, Tailwind CSS, class-variance-authority, tailwind-merge, Radix UI, React Hook Form, cmdk, ai, @ai-sdk/react, katex, streamdown, @hookform/resolvers, Zod · [Compare](https://seerepo.com/compare/marimo-team/marimo/vs/Significant-Gravitas/AutoGPT) - [shadcn-ui/ui](https://seerepo.com/r/shadcn-ui/ui/built): React, Vite, Tailwind CSS, class-variance-authority, PostCSS, TanStack, Radix UI, React Hook Form, react-resizable-panels, dnd-kit, cmdk, Lucide, ai, @ai-sdk/react, streamdown, Zod · [Compare](https://seerepo.com/compare/marimo-team/marimo/vs/shadcn-ui/ui) ## Frequently asked questions ### What language is marimo written in? marimo is written in Python, with 907,947 written lines. ### What framework does marimo use? marimo is built with FastAPI, starlette, uvicorn, React, and Vite. ### Does marimo use AI? Yes. marimo uses AI through ai and @ai-sdk/react. ### Does marimo have tests? Yes. marimo has 1,461 test files and is tested with pytest-asyncio, Pytest, Vitest, Testing Library, @playwright/test, and msw. ### Which repos have a stack like marimo's? The ones that share most of its stack: supabase/supabase, paperclipai/paperclip, and NousResearch/hermes-agent. ## 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.