Compare frameworks
Ragas vs 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 | Ragas | LlamaIndex | Letta |
|---|---|---|---|
| Stars | 15,834Synced from sourceCurrent4h ago | 52,306 (highest of the compared values)Synced from sourceCurrent4h ago | 24,864Synced from sourceCurrent4h ago |
| downloads | — | 83,631Synced from sourceCurrent4h ago | — |
| Last commit | 2026-02-24Synced from sourceCurrent4h ago | 2026-09-24Synced from sourceCurrent4h ago | 2026-09-10Synced from sourceCurrent4h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent4h ago | MITSynced from sourceCurrent4h ago | Apache-2.0Synced from sourceCurrent4h ago |
| Archived | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago |
| Category | evaluationSeeded, unreviewedwritten 1mo ago | ragSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 246Synced from sourceCurrent4h ago | 1999Synced from sourceCurrent4h ago | 155Synced from sourceCurrent4h ago |
| Forks | 1725Synced from sourceCurrent4h ago | 8203Synced from sourceCurrent4h ago | 2628Synced from sourceCurrent4h ago |
| Maintainer | Vibrant LabsSeeded, unreviewedwritten 1mo ago | LlamaIndexSeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | — | 429018Synced from sourceCurrent4h ago | — |
| npm downloads, weekly | — | 83631Synced from sourceCurrent4h ago | — |
| npm package | — | llamaindexSynced from sourceCurrent4h ago | — |
| npm window ends | — | 2026-09-21Synced from sourceCurrent4h ago | — |
| Open issues | 607Synced from sourceCurrent4h ago | 849Synced from sourceCurrent4h ago | 0Synced from sourceCurrent4h ago |
| PyPI package | ragasSynced from sourceCurrent4h ago | llama-indexSynced from sourceCurrent4h ago | lettaSynced from sourceCurrent4h ago |
| PyPI released | 2026-01-13T17:47:59.200116ZSynced from sourceCurrent4h ago | 2026-09-21T16:22:20.056831ZSynced from sourceCurrent4h ago | 2026-09-23T23:59:05.225455ZSynced from sourceCurrent4h ago |
| Requires Python | >=3.9Synced from sourceCurrent4h ago | <4.0,>=3.10Synced from sourceCurrent4h ago | >=3.9Synced from sourceCurrent4h ago |
| PyPI version | 0.4.3Synced from sourceCurrent4h ago | 0.14.25Synced from sourceCurrent4h ago | 0.33.0Synced from sourceCurrent4h ago |
| Repository | https://github.com/vibrantlabsai/ragasSynced from sourceCurrent4h ago | https://github.com/run-llama/llama_indexSynced from sourceCurrent4h ago | https://github.com/letta-ai/lettaSynced from sourceCurrent4h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 4h 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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