Alternatives to Agency

OpenAI Agents SDK: a free, MIT-licensed Python framework for building multi-agent workflows with handoffs, guardrails, and tracing.

Microsoft's MIT-licensed Python and .NET framework for building conversational and event-driven multi-agent AI applications.

Microsoft's open-source, code-first Python framework for building stateful, data-intensive conversational AI agents.

Open-source multi-agent framework that assigns PM, architect, engineer and QA roles to LLMs for structured software tasks

Microsoft Agent Framework is a developer SDK for building agentic AI with tools, workflows, and a GA Agent Harness runtime.

SmolAgents is Hugging Face's open-source Python library for building code-writing AI agents in a few lines of code.

AgentScope is an open-source Python framework from Alibaba for building distributed multi-agent AI systems.

Microsoft's open-source SDK for building AI agents and copilots with plugins, memory, and multi-agent orchestration.

Eino is an open-source Go LLM framework from ByteDance for building agents, graphs, and RAG pipelines in your existing Go backend.

Open-source React framework for agent chat, generative UI, and shared state on any AG-UI backend.

Mastra is an open-source TypeScript agent framework for durable agents, typed workflows, and built-in evals.

Pydantic AI is the typed Python agent SDK: declare a model string and a Pydantic output type, get validated structured results on every run.

Open-source library of 817 structured cybersecurity skill files your AI coding agent loads on demand, mapped to MITRE ATT&CK and licensed Apache 2.0.

Zhipu GLM is a full-stack large-model platform with open-weights GLM-5.3 coding models, MaaS APIs and autonomous agents.

Agent evaluation platform that simulates voice and chat agents, traces production, and scores hallucinations before customers hit them

Imbue builds inspectable coding-agent tools, from mngr's parallel agent runner to Latchkey's HTTP permissions

Pipedream is the integration layer that gives AI agents managed auth plus 10,000+ tools across 3,000+ APIs.

Tessl is an agent enablement platform for versioning, scanning and evaluating the AI agent skills your coding agents run.

GitLab Duo adds policy-governed AI agents and flows across the DevSecOps lifecycle inside GitLab

Open-source, self-hosted agentic data assistant that connects to your databases, writes SQL and code, and runs analysis in sandboxes

Flowith is an infinite canvas for running parallel AI image, video, slide, and research agents at once.

Capafy AI is an agent skills marketplace where you buy, run, and publish ready-made AI agent skills priced per skill or per use.

Self-hosted cloud development environments with built-in governance for AI coding agents and LLM traffic.

Hermes Desktop is a free, open-source desktop GUI for the Hermes Agent — a self-hosted AI agent with a built-in learning loop that turns

Token-efficient AI agent with SquillaRouter model routing that cuts agent token cost by sending simple steps to cheap models.

Hermes Agent is an open-source, self-hosted AI agent with persistent memory that auto-builds reusable skills and reaches you on 20+ chat

Open-source, self-hosted AI agent that plans tasks, runs tools, and grows its own long-term memory.

Paseo is a self-hosted control plane for running many coding agents at once — Claude Code, Codex, Copilot and 33+ more — from desktop,

DeerFlow is an open-source SuperAgent harness that researches, codes, and creates inside a persistent Docker sandbox.

Open-source AI agent loop that iterates a task list in Docker Sandboxes and commits the results.