LlamaIndex vs vLLM

LlamaIndex and vLLM both appear on the Smoower Developer Ecosystem Index.

vLLM (rank #22) holds a modest lead over LlamaIndex (rank #105) on the overall Smoower ecosystem score (67 vs 58). The gap of 9 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), vLLM is ahead of LlamaIndex. On education (docs, guides and learning material for developers), vLLM is slightly ahead of LlamaIndex. On community (issue response, PR reviews and discussion health), vLLM is clearly ahead of LlamaIndex. On reach (how visible the ecosystem is beyond its own repos), LlamaIndex is slightly ahead of vLLM. On momentum (release cadence and how fast the ecosystem moves), LlamaIndex is slightly ahead of vLLM.

LlamaIndex carries 103,363 GitHub stars across 152 public repos, with 39 repositories active in the last 90 days and 289 external contributors on record. vLLM shows 129,682 stars across 50 public repos, 41 active in the last 90 days and 1,008 external contributors.

LlamaIndex is the stronger read for anyone weighting momentum. vLLM looks better where community is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.