Source: https://seerepo.com/compare/onyx-dot-app/onyx/vs/StarTrail-org/LEANN
Markdown source: https://seerepo.com/compare/onyx-dot-app/onyx/vs/StarTrail-org/LEANN.md
Description: onyx and LEANN share 12 technologies: FastAPI, pyzmq, OpenAI, einops, MCP, torch, sentence-transformers, transformers, pdfplumber, pypdfium2, psutil, and boto3. Both are written in Python.

# onyx vs LEANN

onyx and LEANN share 12 technologies: FastAPI, pyzmq, OpenAI, einops, MCP, torch, sentence-transformers, transformers, pdfplumber, pypdfium2, psutil, and boto3. Both are written in Python.

- [onyx-dot-app/onyx](https://seerepo.com/r/onyx-dot-app/onyx): Open Source AI Platform - AI Chat with advanced features that works with every LLM
- [StarTrail-org/LEANN](https://seerepo.com/r/StarTrail-org/LEANN): [MLsys2026 Best Paper]: https://arxiv.org/abs/2506.08276. RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate, and 100% private RAG application on your personal device.

## What they share and what sets them apart

- In common: FastAPI, pyzmq, OpenAI, einops, MCP, torch, sentence-transformers, transformers, pdfplumber, pypdfium2, psutil, boto3
- Only in onyx: amqp, asyncpg, azure-storage-blob, azure-storage-file-datalake, boxsdk, fastavro, google-cloud-core, ldap3, OpenSearch, partd, psycopg2-binary, py-key-value-aio, s3transfer, zict, Celery, Redis, Postgres, pyairtable, Sentry, Google, Google Cloud Storage, Hugging Face, PostHog, Stripe, asgiref, fastmcp-slim, Flask, graphql-core, jupyter-core, tornado, werkzeug, Terraform, starlette, AIOHTTP, fastmcp, uvicorn, anyio, Tauri, Tokio, objc2-app-kit, objc2-foundation, React, react-native, Expo, expo-secure-store, react-native-mmkv, Next.js, Lit, cycler, fonttools, soupsieve, charm.land/lipgloss/v2, contourpy, matplotlib-inline, prompt-toolkit, Rich, urwid, charm.land/bubbletea/v2, charm.land/bubbles/v2, charm.land/wish/v2, SQLAlchemy, alembic, fastapi-users-db-sqlalchemy, argon2-cffi, argon2-cffi-bindings, authlib, azure-identity, google-auth-httplib2, itsdangerous, joserfc, keyring, libpass, msal-extensions, pwdlib, pyjwt, python3-saml, fastapi-users, google-auth, cryptography, httpx-oauth, msal, oauthlib, requests-oauthlib, google-auth-oauthlib, accelerate, agent-client-protocol, azure-cognitiveservices-speech, langchain-protocol, langsmith, NVIDIA, nvidia-cudnn-cu12, onnxruntime, openinference-instrumentation, openinference-semantic-conventions, scikit-learn, triton, litellm, chonkie, tiktoken, braintrust, langfuse, cohere, exa-py, LangChain, safetensors, tokenizers, unstructured-client, voyageai, chevron, courlan, defusedxml, docutils, et-xmlfile, jinja2, justext, lxml, lxml-html-clean, magika, mako, mammoth, markdown-it-py, markdownify, markupsafe, mdurl, msoffcrypto-tool, mwparserfromhell, olefile, pdfminer-six, python-docx, python-pptx, rich-rst, ruamel-yaml, xlrd, xlsxwriter, beautifulsoup4, puremagic, pillow, github.com/yuin/goldmark, pypdf, markitdown, mistune, openpyxl, reportlab, sendgrid, annotated-types, beartype, jsonschema-path, jsonschema-specifications, openapi-pydantic, referencing, validate, Pydantic, github.com/hashicorp/terraform-plugin-framework-validators, email-validator, azure-core, coloredlogs, execnet, OpenTelemetry, opentelemetry-exporter-http-transport, opentelemetry-exporter-otlp-common, opentelemetry-semantic-conventions, python-json-logger, supervisor, prometheus-client, botocore, prometheus-fastapi-instrumentator, github.com/sirupsen/logrus, kubernetes, aiobotocore, docker, github.com/charmbracelet/log, Prometheus, gtk, window-vibrancy, tauri-plugin-window-state, Tailwind CSS, nativewind, class-variance-authority, tailwind-merge, react-native-svg, react-native-safe-area-context, rn-primitives, expo-image, React Hook Form, react-native-reanimated, react-native-gesture-handler, react-native-keyboard-controller, expo-splash-screen, expo-status-bar, react-native-enriched-markdown, Shopify, expo-document-picker, expo-image-picker, react-native-streamdown, next-themes, Formik, Radix UI, motion, react-dropzone, dnd-kit, lowlight, recharts, react-icons, Lucide, react-markdown, remark-gfm, highlight.js, rehype-katex, remark-math, katex, rehype-highlight, unified, docx-preview, dompurify, pdfjs-dist, react-pdf, rehype-sanitize, rehype-stringify, remark, remark-parse, xlsx, yup, TanStack, @floating-ui/react-dom, react-day-picker, marked
- Only in LEANN: seaborn, evaluate, llama-index-embeddings-huggingface, Ollama, sglang, torchvision, llama-index, datasets, flashlib, faiss-cpu, mlx, mlx-lm, llama-index-readers-file, nbconvert, pypdf2, pymupdf

## Side by side

| | onyx | LEANN |
|---|---|---|
| Size | 1,761,418 lines written, 4,062 code files | 55,453 lines written, 86 code files |
| Who writes it | 12.3% of its commits signed by AI. With Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep | 11.2% of its commits signed by AI. With Claude Code, Cursor, GitHub Copilot, and Jules |
| Activity | Last push November 14, 2026, 11,587 commits, 33,395 stars | Last push November 3, 2026, 617 commits, 13,785 stars |
| Tests | 3,403 test files. 47.3% of its code files have a test that imports them | 65 test files. 36% 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, onyx or LEANN?

onyx, with 1,761,418 lines written; LEANN has 55,453.

The proof: [onyx-dot-app/onyx's code at commit 82c169c](https://github.com/onyx-dot-app/onyx/tree/82c169c22d416d463df921b5037b8c288743ea93)

### Which has more GitHub stars, onyx or LEANN?

onyx, with 33,395 stars; LEANN has 13,785.

The proof: [onyx-dot-app/onyx on GitHub](https://github.com/onyx-dot-app/onyx)

### Which has more tests, onyx or LEANN?

onyx, with 3,403 test files; LEANN has 65.

The proof: [onyx-dot-app/onyx's code at commit 82c169c](https://github.com/onyx-dot-app/onyx/tree/82c169c22d416d463df921b5037b8c288743ea93)

### Which was updated more recently, onyx or LEANN?

onyx: its last push was on November 14, 2026, and LEANN's on November 3, 2026.

The proof: [onyx-dot-app/onyx's commits on GitHub](https://github.com/onyx-dot-app/onyx/commits)

### Which has more commits signed by AI, onyx or LEANN?

onyx: an AI signed 12.3% of its commits, with Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep; in LEANN, 11.2%.

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

## Sources

- onyx-dot-app/onyx: Read on November 14, 2026, at commit 82c169c (https://github.com/onyx-dot-app/onyx/tree/82c169c22d416d463df921b5037b8c288743ea93)
- StarTrail-org/LEANN: Read on November 9, 2026, at commit 07796bd (https://github.com/StarTrail-org/LEANN/tree/07796bd7e40f2d5f3a4be9e45adf1f62a68481fd)

## 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.