LlamaIndex vs vLLM

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

vLLM (rank #47) holds a narrow lead over LlamaIndex (rank #63) on the overall Smoower ecosystem score (61 vs 59). The gap of 2 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 clearly ahead of vLLM. On momentum (release cadence and how fast the ecosystem moves), LlamaIndex is ahead of vLLM.

LlamaIndex carries 99,809 GitHub stars across 135 public repos, with 48 repositories active in the last 90 days and 241 external contributors on record. vLLM shows 115,730 stars across 43 public repos, 35 active in the last 90 days and 881 external contributors.

LlamaIndex is the stronger read for anyone weighting reach. 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.