AI · alternatives · 2026
24 alternatives to A2acast – Let AI agents on different computers work together
Zero-infrastructure A2A messaging between AI agents on different machines — Claude, ChatGPT/Codex, Copilot, any harness; ntfy relay transport, no ports, no server - husker/a2acast
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
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HarnessRouter Community Editionfree tier, from $20/mo▲397Open-source unified interface for agent harnesses
Aug 2026 · harnessrouter.ai · its alternatives →
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AgentConnect▲145Tag any agent, wherever work happens.
Aug 2026 · agentconnect.md · its alternatives →
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Vokal▲441A collaboration space for 10x teammates with their Al agents
Jun 2026 · vokal.team · its alternatives →
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We were spending a lot of time re-writing the same primitives in projects we were doing getting claude + codex + other harnesses communicating in real time. Many other projects forced us into using their framework or harness or into a specific stack. So we open sourced an SDK that acts as the messaging layer without the rest of it. Still early, but we've been working on it and found it useful.
Jun 2026 · github.com · its alternatives →
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agmsg▲245Cross-vendor messaging for CLI AI coding agents — let Claude Code, Codex, Gemini & Copilot talk to each other in one team. Bash + SQLite, no daemon, no framework. - fujibee/agmsg
Jun 2026 · github.com · its alternatives →
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Contribute to chathub-dev/chathub development by creating an account on GitHub.
2023 · github.com · its alternatives →
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One memory, not one per tool. Cog gives AI agents a shared, structured memory layer using plain-text files — portable across Claude Code, Codex, Cursor, Gemini CLI, Windsurf, Copilot, and more.
Mar 2026 · lab.puga.com.br · its alternatives →
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Mantle Chat▲298Collaboration platform where teams work with AI together
May 2026 · mantle.chat · its alternatives →
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HTTP API for Claude Code, Goose, Aider, Gemini, Amp, and Codex - coder/agentapi
2025 · github.com · its alternatives →
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A2A Protocol▲109Hi HN, I am an independent open-source researcher. For the past few months, I've been building a2a-project, an experimental economic layer for autonomous AI agents on the Base Mainnet. The Problem: AI evolution is exponential, while human regulation is linear. If agents become economic actors, they will transact at speeds and granularities that traditional fiat rails cannot handle. We need a native protocol to bridge this "Speed Gap" and ensure stability. The Experiment (Quantum-Humanistic Economics): I implemented a novel mechanism into Solidity smart contracts: Quantum Task Buffer: Work…
2025 · github.com · its alternatives →
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Codex-powered agents for teams.
Apr 2026 · openai.com · its alternatives →
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An archive of autonomous discussions between AI agents from Anthropic, OpenAI, and Google. Browse the conversations and upvote your favorites.
Feb 2026 · agentalcove.ai · its alternatives →
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I finally got around to making a tool I've wanted for a long time: you can basically think of it as being "like Gmail for coding agents." If you've ever tried to use a bunch of instances of Claude Code or Codex at once across the same project, you've probably noticed how annoying it can be when they freak out about the other agent changing the files they're working on. Then they start doing annoying things, like restoring files from git, in the process wiping out another agent's work without a backup. Or if you've tried to have agents coordinate on two separate repos, like a Python backend…
Nov 2025 · github.com · its alternatives →
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ThreadPort▲67Move AI chats between ChatGPT, Claude & Gemini in one click
Aug 2026 · megarampo.github.io · its alternatives →
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I kept copy pasting between two Claude Code instances. My teammate would ask me something about a module I wrote, I'd paste their question into my Claude Code, copy the answer, send it back on Slack. We were playing telephone between two agents that could have just talked directly. So I built AgentDM. It's a hosted messaging grid where AI agents DM each other by @alias. Any MCP compatible client connects with a 5 line JSON config no SDK, no shared runtime. This is how it works: - Each agent gets a unique @alias. - Three(main) MCP tools: send_message, read_messages, message_status. - Messages…
Apr 2026 · agentdm.ai · its alternatives →
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Most people right now are talking to their AI agents through Telegram bots, WhatsApp, Discord, or just copying and pasting between terminals. There’s still no simple, straightforward way for agents to message each other directly. AgentBus solves exactly that. You register each agent with one quick API call. Then they can send messages to each other using simple REST calls. No servers, no queues, no WebSockets, no extra infrastructure. Just drop in a tiny polling loop and your agents can now talk, collaborate, and run real workflows across laptops, VPSes, clouds — whatever. You can also…
Mar 2026 · agentbus.org · its alternatives →
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Another month, another agent-shell update. If you missed the last one, have a look at the 0.63 update. While this post showcases the latest highlights...
Aug 2026 · xenodium.com · its alternatives →
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Cross-framework messaging protocol for AI agents
May 2026 · github.com · its alternatives →
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AI Assistify▲16No-code AI agents & #1 chat UI for GPT, Gemini, Claude+
2024 · aiassistify.io · its alternatives →
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Every AI Model. Switch models without losing context
Oct 2025 · usemynx.com · its alternatives →
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A2A Net▲29Automatically optimize an AI agent from your B2B SaaS APIs
Sep 2026 · a2anet.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →