Alternatives to Aser

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

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

Hugging Face's Apache-2.0 Python library for AI agents that write and run their actions as code.

AutoGen is Microsoft's open-source framework for building conversational and event-driven multi-agent AI apps in Python and .NET.

Open-source Python framework for building multi-agent AI teams that deliver results straight to Telegram, Slack, Discord and WhatsApp.

Free 16-chapter Datawhale open-source tutorial that teaches you to build AI agents from scratch in Python, including your own HelloAgents framework.

Haystack is deepset's open-source Python framework for building inspectable RAG pipelines and production-grade AI agents

Pydantic AI is the typed, open-source Python agent framework that returns Pydantic-validated objects from every run.

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

Microsoft Agent Framework is an open-source SDK for building agentic AI with workflows, checkpoints, and the GA Agent Harness runtime.

TabTin is an open-source team agent harness that runs sub-agents and people on one shared task surface for code, docs and spreadsheets.

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

Open source durable execution SDK for background jobs, workflows, and AI agents — wrap code in step.run() and get retries, flow control,

Open-source TypeScript agent framework with durable workflows, memory, and observability built into one stack.

Open-source TypeScript platform for durable AI agents and long-running background jobs that survive redeploys and crashes.

LangGraph is an MIT-licensed, low-level agent orchestration framework for building stateful, controllable AI agents as graphs of states and transitions.

Google Agent Development Kit (ADK) is the MIT-licensed framework for building production AI agents with graph workflows

Let your AI agent resolve a plain-language task into one ranked, install-ready agent skill with trust signals attached.

Open-source meta-harness that runs Claude Code, Codex, Pi and your own agents under one policy, sandbox and cost layer

GitNexus turns any codebase into a deterministic knowledge graph of call chains and execution flows that AI coding agents query through 7 MCP tools.

Yao Agents is a self-hosted AI agent runtime that runs autonomous agents across every computer you own.

A framework-agnostic book on designing multi-agent LLM systems, written by AutoGen's Victor Dibia.

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

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

MyClaw's managed hosting feature that turns a colleague's Slack, Teams, and GitHub trail into a portable AI agent Skill.

DBOS adds durable workflows, queues, and cron to apps and AI agents using the Postgres database you already run.

Lyzr's Opencontroller is a control plane to run, monitor and govern AI agents built on any framework.

Hermes Agent: a self-hosted open-source AI agent with persistent memory that builds reusable skills across 20+ chat platforms.

Enterprise agent workforce platform for building, operating, and governing AI agents across on-prem, hybrid, and multi-cloud environments.

Open-source Python SDK plus AgentOS runtime for serving agents as a REST API and MCP server you host yourself.