LlamaIndex vs vLLM

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

vLLM (rank #97) holds a narrow lead over LlamaIndex (rank #188) on the overall Smoower ecosystem score (58 vs 52). The gap of 6 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 clearly 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), vLLM is slightly ahead of LlamaIndex. On momentum (release cadence and how fast the ecosystem moves), vLLM is slightly ahead of LlamaIndex.

LlamaIndex carries 103,819 GitHub stars across 152 public repos, with 33 repositories active in the last 90 days and 302 external contributors on record. vLLM shows 131,658 stars across 52 public repos, 43 active in the last 90 days and 1,044 external contributors.

LlamaIndex is worth a look for teams already invested in its stack. 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.