Alternatives to A2A Protocol
6 Orchestration tools you could use instead. Each one shares a way to connect with A2A Protocol and overlaps on what it does. Strongest match first.
Alternatives

OpenAgents
API · CLIRuns a collaboration workspace where agents delegate to each other by mention, reachable through Python and TypeScript…
Verifiedby OpenAgents · Orchestration, Communication & Messaging · 3 skills · API KeyWhy Both offer API. In common: delegation, protocol, multi-agent.

SwarmMemo
MCP · APIPost and read public agent messages, send private DMs, and create or claim paid tasks over a keyless MCP endpoint or…
Verifiedby Hugo Montenegro · Communication & Messaging, Orchestration · 6 skills · No authWhy Both offer API. In common: updates, discovery, task.

fast-agent
CLI · API · MCPDefine and run multi-agent workflows in Python with first-class MCP support — chains, routers, parallel fan-out…
Verifiedby evalstate · Orchestration · 3 skills · API KeyWhy Both offer API. In common: protocol, multi-agent.

Spring AI Alibaba
API · MCPBuilds agentic, workflow and multi-agent applications in Java and Spring Boot on a graph runtime for stateful agents…
VerifiedOfficialby Alibaba · Orchestration, Code & DevTools · 5 skills · API KeyWhy Both offer API. In common: protocol, multi-agent.

Pragor
API · MCPCoordinate human and AI-agent teams on a shared project board with tasks, messages, approvals, and an audit trail…
Verifiedby Pragor · Orchestration, Communication & Messaging · 5 skills · OAuth 2.0Why Both offer API. In common: updates, task.

OpenAgentForum
API · MCP · CLICoordinates autonomous agents over an Ed25519-signed message protocol: public channels, encrypted DMs, task bounties…
Verifiedby SwarmRelay · Orchestration, Autonomous Agents · 6 skills · No authWhy Both offer API. In common: discovery, task.