The best AI agent frameworks
Every option ranked — open-source, self-hostable, and commercial — by our transparent Sovereignty Score, with honest trade-offs so you choose what fits you, not us.
The software that lets a model plan, call tools and act over several steps instead of answering once. The fastest-moving category in AI, and almost entirely open source.
L4Models & tooling — layer 4 of the AI stack- 1
LangGraph
Top pickOpen sourceAgents as an explicit state graph — the closest thing to what you are leaving.
Free and open source. LangGraph Platform is an optional paid hosted tier. · in our OpenAI AgentKit comparison →
What is LangGraph? →92sovereignty - 2
OpenClaw
Open sourceThe runaway story of 2026 — 384k stars and MIT-licensed.
Free and open source. You pay only for whatever model you point it at. · in our OpenAI AgentKit comparison →
What is OpenClaw? →94sovereignty - 3
CrewAI
Open sourceAgents as a team with roles — the fastest thing here to get working.
Free and open source. CrewAI Enterprise is a separate commercial platform. · in our OpenAI AgentKit comparison →
What is CrewAI? →90sovereignty - 4
Dify
CommercialThe visual builder AgentKit was — but read the licence before you commit.
Free to self-host within the licence terms. Dify Cloud and a commercial licence are paid. · in our OpenAI AgentKit comparison →
What is Dify? →72sovereignty
Is it free?
The free tier, its real limits and where you start paying — read from each vendor's own pricing page and dated.
Run these yourself
What each one actually needs — real RAM, honest running cost, and the setup time nobody quotes.
- Self-hosting Dify 8 GB. The default compose file starts 16 containers — api, api_websocket, worker, worker_beat, web, plugin_daemon, agent_backend, Weaviate, PostgreSQL, Redis, nginx, two SSRF proxies, two sandboxes and a one-shot init job — and Dify's own macOS instructions ask for a Docker VM with 8 GiB. More if a local model shares the box.
Replacing a specific tool?
Head-to-head comparisons for each popular ai agent frameworks product.
Straight head-to-heads
Two ai agent frameworks tools, side by side — verified facts and a plain verdict.