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Best Agent frameworks & MCP, ranked

Building blocks for your own agents and tool integrations.

⚠ Preview score, not yet tested. Scores are editorial estimates pending hands-on tests. Last reviewed:

  1. #1

    Model Context ProtocolFREE TIER

    The standard way to plug tools and data into AI assistants.

    PRICING: Open standard; free SDKs · LAST REVIEWED

    90/100
    Preview score, not yet tested
  2. #2

    LangGraphFREE TIER

    Fine-grained stateful agent graphs for production workflows.

    PRICING: Open source; paid hosted platform · LAST REVIEWED

    85/100
    Preview score, not yet tested
  3. #3

    OpenAI Agents SDKFREE TIER

    Lightweight, minimal-abstraction multi-agent SDK.

    PRICING: Open source; pay model usage · LAST REVIEWED

    84/100
    Preview score, not yet tested
  4. #4

    MastraFREE TIER

    TypeScript-first agent framework, a natural fit for JS builders.

    PRICING: Open source; paid cloud · LAST REVIEWED

    82/100
    Preview score, not yet tested
  5. #5

    CrewAIFREE TIER

    Fast role-based multi-agent setups in Python.

    PRICING: Open source; paid enterprise platform · LAST REVIEWED

    80/100
    Preview score, not yet tested