Compare frameworks
LlamaIndex vs Letta
Every figure below carries the source that reported it and the moment it was observed. Values that failed validation are withheld rather than shown, and a dash means no source we track carries that field for that framework.
| Field | LlamaIndex | Letta |
|---|---|---|
| Stars | 52,334 (highest of the compared values)Synced from sourceCurrent2h ago | 24,923Synced from sourceCurrent2h ago |
| downloads | 149,503Synced from sourceCurrent2h ago | — |
| Last commit | 2026-09-27Synced from sourceCurrent2h ago | 2026-09-10Synced from sourceCurrent2h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | MITSynced from sourceCurrent2h ago | Apache-2.0Synced from sourceCurrent2h ago |
| Archived | noSynced from sourceCurrent2h ago | noSynced from sourceCurrent2h ago |
| Category | ragSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 2001Synced from sourceCurrent2h ago | 155Synced from sourceCurrent2h ago |
| Forks | 8232Synced from sourceCurrent2h ago | 2631Synced from sourceCurrent2h ago |
| Maintainer | LlamaIndexSeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | 445795Synced from sourceCurrent2h ago | — |
| npm downloads, weekly | 149503Synced from sourceCurrent2h ago | — |
| npm package | llamaindexSynced from sourceCurrent2h ago | — |
| npm window ends | 2026-09-26Synced from sourceCurrent2h ago | — |
| Open issues | 896Synced from sourceCurrent2h ago | 0Synced from sourceCurrent2h ago |
| PyPI package | llama-indexSynced from sourceCurrent2h ago | lettaSynced from sourceCurrent2h ago |
| PyPI released | 2026-09-21T16:22:20.056831ZSynced from sourceCurrent2h ago | 2026-09-28T04:32:31.896015ZSynced from sourceCurrent2h ago |
| Requires Python | <4.0,>=3.10Synced from sourceCurrent2h ago | >=3.9Synced from sourceCurrent2h ago |
| PyPI version | 0.14.25Synced from sourceCurrent2h ago | 0.33.5Synced from sourceCurrent2h ago |
| Repository | https://github.com/run-llama/llama_indexSynced from sourceCurrent2h ago | https://github.com/letta-ai/lettaSynced from sourceCurrent2h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 2h ago. Where a row is marked, ▲ is the highest of the values shown and ▼ the lowest — arithmetic on the figures above, not a ranking or a recommendation. Rows where neither extreme is meaningful are left unmarked rather than given a direction they do not have.
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