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Alternatives to Semantic Kernel

Semantic Kernel is an agent framework by Microsoft: Model-agnostic SDK for building agents and multi-agent systems in Python, .NET and Java; Microsoft names Agent Framework as its successor. If it doesn't fit your setup, these 12 agent frameworks cover similar ground. They are ordered by how closely they match Semantic Kernel and by our rank, which weighs adoption, freshness and documentation; money never changes the order. LlamaIndex leads the list (52.6K GitHub stars; active in the last 30 days). Each entry shows data reasons to switch, and you can open a side-by-side comparison with Semantic Kernel.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

You're replacing

Semantic Kernel

Model-agnostic SDK for building agents and multi-agent systems in Python, .NET and Java; Microsoft names Agent Framework as its successor.

12 alternatives

Ordered by how closely each matches Semantic Kernel (shared product, category or stated alternative) and by rank.

  1. 1
    LlamaIndex

    LlamaIndex

    Open-source Python toolkit for RAG and agents over your own data, with event-driven workflows and 300+ integration packages.

    • 52.6K GitHub stars
    • Active in the last 30 days

    ★ 52.6K↓ 1.4M/wkLast active Oct 14, 2026Compare →

  2. 2
    AgentScope Java

    Alibaba Tongyi Lab

    Java framework for distributed, long-running agents with typed event streams, permission gating, middleware and subagents.

    • 6.1K GitHub stars
    • Active in the last 30 days

    ★ 6.1KLast active Oct 24, 2026Compare →

  3. 3
    atmosphere

    Atmosphere

    Java runtime for AI agents that streams tokens and tool events over WebSocket, SSE or gRPC, with human approvals.

    • 3.8K GitHub stars
    • Active in the last 30 days

    ★ 3.8KLast active Oct 23, 2026

  4. 4
    LangChain

    LangChain

    Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.

    • More GitHub stars (148.4K)

    ★ 148.4K↓ 37.3M/wkLast active Oct 24, 2026Compare →

  5. 5
    LangGraph

    LangChain

    Low-level Python orchestration framework for long-running stateful agents, with durable execution, human review points and short- and long-term memory.

    • 43.8K GitHub stars
    • Active in the last 30 days

    ★ 43.8K↓ 13.1M/wkLast active Oct 24, 2026Compare →

  6. 6
    CrewAI

    CrewAI

    Open-source Python framework for multi-agent workflows, with role-based Crews and event-driven Flows.

    • More GitHub stars (60.1K)

    ★ 60.1K↓ 644.6K/wkLast active Oct 24, 2026Compare →

  7. 7
    LangChain4j

    LangChain4j

    Java library with one API over LLM providers and vector stores, plus tools, RAG and integrations for Quarkus and Spring Boot.

    • 13.3K GitHub stars
    • Active in the last 30 days

    ★ 13.3KLast active Oct 23, 2026

  8. 8
    Spring AI

    Broadcom (Spring)

    Java application framework from the Spring project with portable chat and embedding APIs, tool calling and vector stores.

    • 9.6K GitHub stars
    • Active in the last 30 days

    ★ 9.6KLast active Oct 23, 2026

  9. 9
    Koog

    JetBrains

    Kotlin and Java framework for AI agents with tools, graph workflows, MCP, streaming and multiplatform targets.

    • Supports Kotlin

    ★ 4.6KLast active Oct 13, 2026

  10. 10
    Embabel

    Embabel

    JVM framework for agentic flows that plan toward goals, mixing LLM calls with code and domain models, usable from Kotlin or Java.

    • Supports Kotlin

    ★ 4.5KLast active Oct 24, 2026

  11. 11
    Quarkus LangChain4j

    Quarkiverse

    Quarkus extensions that connect LangChain4j to Quarkus apps, with declarative AI services and LLM, tool and embedding support.

    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 326Last active Oct 23, 2026

  12. 12
    BotSharp

    SciSharp

    C# framework on .NET for building multi-agent AI bots with plugins, RAG, MCP integration and a built-in admin UI.

    • 3.1K GitHub stars
    • Active in the last 30 days

    ★ 3.1KLast active Oct 23, 2026

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