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Open Agent: Open-source alternative to Claude Agent SDK, ChatGPT Agents, and Manus. 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 Agent. This is an automatic list. We have not written a researched verdict for Open Agent 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.
A playground for neuro-san
Neuro San is an open source, data driven library from Cognizant for building multi agent systems. Agent networks are defined in HOCON configuration files with minimal orchestration code, which the vendor says allows fast iteration and modular deployment across tools, models and infrastructure. It is the open source lib...
The Agentic Framework of the PHP ecosystem to build production-ready AI driven applications.
Neuron is a PHP framework for building agentic applications. It handles the plumbing of working with language models, including provider orchestration, memory, streaming, structured output, monitoring and debugging, so developers can concentrate on what their agents actually do. It runs inside an ordinary PHP codebase ...
Move from idea to production in hours with policy-driven autonomous AI agents.
SuperAgentX is an enterprise AI engineering platform, described by the vendor as an operating system for enterprise AI. It brings together the pieces needed to build, run, govern, observe and evaluate AI agents and applications: a builder studio, tools and plugins, knowledge connectors, a workflow designer, multi agent...
Event-sourced graph runtime for durable and stateful agents
activegraph is an open source Python runtime for long running AI agents from Yohei Nakajima, the creator of BabyAGI. It records everything an agent does in an append only event log and projects that log into a live graph of beliefs, tasks, evidence, decisions and dependencies. The graph becomes the agent's world: what ...
Mobile app automation and verification for AI coding agents.
Agent Device is an open source device automation tool from Callstack that lets AI coding agents operate and verify real apps on iOS, Android, TV and desktop targets. It applies the patterns that made browser automation practical for web agents to native mobile and TV apps, so an agent can open an app, read the screen, ...
Minimal kernel to make any AI coding agent stateful.
Agent Kernel is a minimal way to make any AI coding agent stateful, using three markdown files and a git repository instead of a framework or database. You clone the repository, start a coding agent inside it and talk to it; the agent reads the kernel, recognizes that it is new, asks who it should be, and from then on ...