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Open Agents: An open source template for building cloud agents. It is listed under Development & Code on AI Registry as a free tool.
The tools below are approved listings in the same category, ordered by how closely their tags match Open Agents. This is an automatic list. We have not written a researched verdict for Open Agents yet, so treat it as a shortlist and check each vendor's pricing page before switching.
Built from each tool's listing. Vendors can update their own listing after claiming it.
Codex for Android, iOS & Mac.
Aether is an open source AI agent app for the phone and desktop, originally built for Android and now also available for iOS and macOS. It pairs a polished conversation interface, inspired by apps such as ChatGPT and Codex, with a local agent engine built on the Pi harness kernel, so the agent can run shell commands, c...
A fast and minimal framework for building agentic systems
Agency is an open source Python library that provides an actor model framework for building agent integrated systems. It gives developers a minimal foundation for connecting AI agents with traditional software, so they can design whatever architecture their application needs rather than adopting a fixed agent pattern. ...
Aser is a lightweight, self-assembling AI Agent frame.
Aser is an open source Python framework for building AI agents with native Web3 capabilities, developed by Ame Network. It lets developers assemble an agent in a few lines of code by combining a language model with modular components for knowledge retrieval, memory, tracing, reasoning, tools and social clients, and the...
Bub it. Build it. A tiny agent runtime, composable with plugins.
Bub is a small, open source Python runtime for building AI agents that work in shared environments. It began in group chats, where several humans and agents had to share one conversation, so it avoids hidden state and opaque memory. It builds on the agents.md convention and Agent Skills, and starts as a working agent t...
Agent framework for the JVM.
Embabel is an agentic AI framework for the Java Virtual Machine. It is written in Kotlin with a usage model intended to feel natural from Java, and its argument is that the qualities which matter once AI becomes mission critical, namely context handling, reliability, type safety, performance, observability and integrat...
Grix : Work with agents like talking to people.
Grix is a messaging style app for working with AI coding agents from a phone or a computer. It turns agents such as DeepSeek Harness, Codex, Claude, Kimi, Qwen, OpenCode, GitHub Copilot and Cursor into contacts, so a developer can message them, invite them into group chats and @mention them with tasks, then follow prog...