Source: https://seerepo.com/compare/comet-ml/opik/vs/langflow-ai/langflow
Markdown source: https://seerepo.com/compare/comet-ml/opik/vs/langflow-ai/langflow.md
Description: opik and langflow share 23 technologies: FastAPI, Redis, OpenAI, AIOHTTP, Vite, React, Rich, LangChain, pillow, Pydantic, jsonschema, class-variance-authority, Tailwind CSS, tailwind-merge, Radix UI, react-hotkeys-hook, react-day-picker, cmdk, Lucide, react-markdown, remark-gfm, rehype-raw, and rehype-sanitize. Both are written in Python.

# opik vs langflow

opik and langflow share 23 technologies: FastAPI, Redis, OpenAI, AIOHTTP, Vite, React, Rich, LangChain, pillow, Pydantic, jsonschema, class-variance-authority, Tailwind CSS, tailwind-merge, Radix UI, react-hotkeys-hook, react-day-picker, cmdk, Lucide, react-markdown, remark-gfm, rehype-raw, and rehype-sanitize. Both are written in Python.

- [comet-ml/opik](https://seerepo.com/r/comet-ml/opik): Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
- [langflow-ai/langflow](https://seerepo.com/r/langflow-ai/langflow): Langflow is a powerful tool for building and deploying AI-powered agents and workflows.

## What they share and what sets them apart

- In common: FastAPI, Redis, OpenAI, AIOHTTP, Vite, React, Rich, LangChain, pillow, Pydantic, jsonschema, class-variance-authority, Tailwind CSS, tailwind-merge, Radix UI, react-hotkeys-hook, react-day-picker, cmdk, Lucide, react-markdown, remark-gfm, rehype-raw, rehype-sanitize
- Only in opik: JAX-RS, Flask, werkzeug, flask-cors, redisson, s3, MySQL, Anthropic, Sentry, AWS S3, Hugging Face, anyio, tanstack, PostHog, itsdangerous, accelerate, spaCy, tiktoken, tokenizers, litellm, transformers, torch, datasets, peft, scikit-learn, markdown-it-py, markupsafe, jinja2, annotated-types, referencing, pydantic-core, Gunicorn, OpenTelemetry, opentelemetry-instrumentation-flask, opentelemetry-instrumentation-logging, opentelemetry-instrumentation-requests, opentelemetry-instrumentation-system-metrics, botocore, docker, React Hook Form, @uiw/react-codemirror, CodeMirror, recharts, dnd-kit, react-textarea-autosize, react18-json-view, react-intersection-observer, react-player, @lezer/highlight, Mermaid, re-resizable, react-grid-layout, react-resizable-panels, Vega, vega-lite, mustache, remark-breaks, ansi-to-html, react-pdf, unist-util-visit, yaml, Zod, @hookform/resolvers, ora, ai, @ai-sdk/google, Nunjucks, @clack/prompts, zod-to-json-schema, @opentelemetry/sdk-trace-base
- Only in langflow: pyarrow, oracledb, Google, uvicorn, react-router-dom, SQLAlchemy, cryptography, pyjwt, bcrypt, google-auth-oauthlib, firecrawl-py, langchain-classic, MCP, exa-py, defusedxml, pypdf, markitdown, msgspec, validators, psutil, loguru, boto3, xyflow, ag-grid-community, Framer, use-stick-to-bottom, react-syntax-highlighter, ace-builds, Headless UI, elkjs, react-error-boundary, react-sortablejs, reactflow, react-icons, @radix-ui/react-icons, dompurify

## Side by side

| | opik | langflow |
|---|---|---|
| Size | 1,680,031 lines written, 7,878 code files | 1,446,517 lines written, 3,937 code files |
| Who writes it | 19.7% of its commits signed by AI. With Claude Code, GitHub Copilot, and Cursor | 1.5% of its commits signed by AI. With Claude Code, CodeRabbit, GitHub Copilot, Cursor, Codex, and Warp |
| Activity | Last push November 4, 2026, 7,898 commits, 23,166 stars | Last push November 4, 2026, 17,600 commits, 156,316 stars |
| Tests | 2,703 test files. 20.9% of its code files have a test that imports them | 3,083 test files. 35.1% 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, opik or langflow?

opik, with 1,680,031 lines written; langflow has 1,446,517.

The proof: [comet-ml/opik's code at commit df61dd2](https://github.com/comet-ml/opik/tree/df61dd21c66e5ed901dafba326bf29cb4b4fbcfb)

### Which has more GitHub stars, opik or langflow?

langflow, with 156,316 stars; opik has 23,166.

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

### Which has more tests, opik or langflow?

langflow, with 3,083 test files; opik has 2,703.

The proof: [langflow-ai/langflow's code at commit 60999cc](https://github.com/langflow-ai/langflow/tree/60999cc9a7350e44dde3ef641baae864e10861f0)

### Which was updated more recently, opik or langflow?

Both got their last push on November 4, 2026.

The proof: [comet-ml/opik's commits on GitHub](https://github.com/comet-ml/opik/commits)

### Which has more commits signed by AI, opik or langflow?

opik: an AI signed 19.7% of its commits, with Claude Code, GitHub Copilot, and Cursor; in langflow, 1.5%.

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

## Sources

- comet-ml/opik: Read on November 4, 2026, at commit df61dd2 (https://github.com/comet-ml/opik/tree/df61dd21c66e5ed901dafba326bf29cb4b4fbcfb)
- langflow-ai/langflow: Read on November 4, 2026, at commit 60999cc (https://github.com/langflow-ai/langflow/tree/60999cc9a7350e44dde3ef641baae864e10861f0)

## 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.