Alternatives

Products that do what A2A Protocol does

a2a-Protocol

1. 1
   A2A Protocol▲109

   Open standard for AI Agent2Agent collaboration

   2025

2. 2
   AP2▲155

   The open protocol for agentic commerce

   Sep 2025

3. 3AA
   An A2A-compatible, open-source framework for multi-agent networks▲42

   Nov 2025 · github.com

4. 4
   A2A Directory▲15

   Comprehensive directory of A2A

   2025

5. 5
   A2A Agent List▲9

   Explore & Share A2A-Compatible AI Agents Easily

   2025

6. 6AP
   Agent2Agent Protocol Explorer▲5

   Understanding the future of AI agent communication with A2A and MCP protocols. Explore how AI agents collaborate and share resources in a unified ecosystem.

   2025 · agent2agent.biz

7. 7TP
   Trust Protocols for Anthropic/OpenAI/Gemini▲40

   Much of my work right now involves complex, long-running, multi-agentic teams of agents. I kept running into the same problem: “How do I keep these guys in line?” Rules weren’t cutting it, and we needed a scalable, agentic-native STANDARD I could count on. There wasn’t one. So I built one. Here are two open-source protocols that extend A2A, granting AI agents behavioral contracts and runtime integrity monitoring: - Agent Alignment Protocol (AAP): What an agent can do / has done. - Agent Integrity Protocol (AIP): What an agent is thinking about doing / is allowed to do. The problem:…

   Feb 2026 · mnemom.ai

8. 8
   Agenta▲362

   Open-source prompt management & evals for AI teams

   Nov 2025 · agenta.ai

9. 9
   A2E Protocol▲3

   Declarative protocol for secure AI agent task automation.

   Dec 2025 · mauricioperera.github.io

10. 10
    AgentX 2.0▲673

    Build your own cross-vendor multi-agent AI team

    2025 · agentx.so

11. 11
    A2UI▲250

    A safe way for AI to build UIs your app can render

    Dec 2025 · a2ui.org

12. 12
    A2A Net▲28

    Automatically optimize an AI agent from your B2B SaaS APIs

    3d ago · a2anet.com

13. 13
    LAD▲7

    How AI agents find each other on local networks

    Jan 2026 · lad-a2a.org

14. 14AE
    Agent.exe, a cross-platform app to let 3.5 Sonnet control your machine▲406

    2024 · github.com

15. 15
    AgentConnect▲145

    Tag any agent, wherever work happens.

    29d ago · agentconnect.md

16. 16
    AgentSky▲430

    Any harness, any LLM — cloud-hosted agents on demand.

    Aug 2026 · agentsky.dev

17. 17
    A2SPA▲8

    Build and Activate AI agents from a single modular dashboard

    Nov 2025 · aimodularity.com

18. 18
    AutoA2A: Convert Agents to A2A Servers▲12

    Easily Deploy Your Existing AI Agent Projects as A2A Servers

    2025

19. 19AA
    Awesome-A2A – curated resources for Google's Agent2Agent protocol▲5

    Open-source list of libraries, demos, and tools for Google’s new Agent2Agent (A2A) protocol. Docs in EN/中文/JA/ES/DE/FR. Looking for feedback & PRs!

    2025 · github.com

20. 20
    Merge Agent Handler▲321

    Power your AI agents with enterprise-ready tools via MCP

    Oct 2025

21. 21AH
    AgentAPI – HTTP API for Claude Code, Goose, Aider, and Codex▲163

    2025 · github.com

22. 22
    A2A Registry▲14

    Live AI agents directory - find production-ready agents now

    2025

23. 23
    A2A Registry▲7

    Discover agents before they are in public.

    2025

24. 24
    OpenAgora▲2

    Open registry for A2A agents discover, connect and pay

    Mar 2026 · openagora.cc

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