A agentindex
Comparison

LlamaIndex vs Mastra

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

LlamaIndex

The data framework for LLM applications.

  • + Best-in-class data connectors and retrieval
  • + Workflows now support agentic flows
  • − Broad surface area is intimidating
  • − Agent story overlaps with LangGraph

Mastra

The TypeScript-first agent framework.

  • + Best-in-class DX for TS/JS teams
  • + Includes evals and memory out of the box
  • − Elastic license limits some commercial hosting
  • − Smaller community than Python options
Spec LlamaIndex Mastra
Category framework framework
License MIT Elastic-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support Yes Yes
Pricing free free
Starting price BYOK usage cost BYOK usage cost
Models claude, gpt, gemini, local, byok claude, gpt, gemini, byok
Languages python, typescript typescript
GitHub stars 50.4k 25.4k
Last activity 2026-06-24 2026-06-25