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RAG & Memory

🧠UltraRAG

ACTIVE STEADY

OpenBMB/UltraRAG · homepage ↗

A Low-Code MCP Framework for Building Complex and Innovative RAG Pipelines

⭐ Popular: 6k stars, gaining about 6 a week

View on GitHub ↗

repo profile

vintage 2025 1 year old
delivery library
language Python
license Apache-2.0

momentum

total stars 6k
stars added last week +6
weekly downloads 3 /wk · PyPI
commits / week 2 accelerating · +200% vs prior mo
issues closed 87% ~3d to close, median
contributors 15
release cadence monthly
last activity today

durability

backing company-owned ModelBest (Tsinghua NLP)
openness permissive
bus factor 1 solo
top-author share 61% 6 mo

bus factor = how many people it takes to cover more than half the commits (6 months). 1 is a solo project; higher means the work is spread across a team. top-author share is the single busiest author's slice of those commits.

since we covered it

monthly average + 205/mo (+5%/mo) · + 1k total since PR#26

why it's a big deal

  • Lets researchers and developers build RAG pipelines with conditional branches and loops in a few dozen lines of YAML instead of custom orchestration code.
  • Serves an academic audience by making it easier to reproduce baselines, with the project referencing work tied to ICLR 2025 and ACL 2025.
  • Ships a visual UI that turns a pipeline into an interactive web app and manages knowledge bases without separate front-end work.

under the hood

  • Built on the Model Context Protocol, with RAG functions exposed as independent MCP servers orchestrated by an MCP client.
  • Decomposes the pipeline into atomic servers such as retriever, reranker, generation, and embedding, with Milvus for vector storage.
  • Primarily Python with a TypeScript and CSS UI, dependencies managed via uv, and both CPU and GPU Docker deployments.

Radar summary, generated from the project's public sources

star history

PR#26 · 4k6k now Jan 2025Aug 2026
  1. PR#26 4k 2026-01-28
  2. now 6k + 1k since first covered

curve is sampled from GitHub's star history, plus our own daily readings since we covered it; the dashed stretch is before we first covered it, the solid line since. figures at coverage are the numbers we printed then (approx.), current count is live.

understory

Better known than its recent output, coasting a little on attention.

-14 understory score output 31 · clout 45
Aug 2025 Jul 2026
  • output, commits & releases
  • clout, star velocity

output = commits & releases; clout = star velocity, both 0 to 100 monthly indices; the gap where output runs above clout is the understory. The understory →

covered in

  • PR#26 2026-01-28 below the radar

    Low-code MCP framework for complex RAG pipelines

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