Best AI agent frameworks and automation platforms

From code-first SDKs to visual workflow builders, these are the tools for wiring models, tools and integrations into agents that actually run. Pick a framework if you write code, or a no-code platform if you would rather drag nodes.

Ranked by score on our 100-point rubric (how we score). Scores are initial editorial estimates from public information, not hands-on tests. Pricing is labeled verified (checked on the vendor's official pricing page, with date) or unverified. Prefer the visual version? See the Agent frameworks tier list.

Quick picks

#	Tool	Tier	Score	Free tier	Pricing
1	n8n Workflow automation with AI agent nodes	S	85	Yes	unverified
2	LangGraph Stateful graph-based agent orchestration	A	80	Yes	verified
3	OpenAI Agents SDK Lightweight framework for multi-agent apps	A	77	Yes	unverified
4	Claude Agent SDK Build agents on the Claude Code harness	A	76	Yes	unverified
5	CrewAI Role-based multi-agent framework	A	76	Yes	unverified
6	Dify Open-source LLM app and agent builder	A	75	Yes	verified
7	Pydantic AI Type-safe Python agent framework	A	74	Yes	verified
8	Mastra TypeScript agent framework	A	73	Yes	verified
9	Zapier Agents No-code AI agents across 8,000+ apps	B	68	Yes	verified
10	Make Visual automation platform with AI agents	B	67	Yes	verified
11	Gumloop No-code AI automation and agent builder	B	66	No	verified

The ranking

1
n8n
Workflow automation with AI agent nodes

open source S85/100

Fair-code workflow automation tool with hundreds of integrations and AI agent nodes; self-hostable.

Best for
You want visual automations with AI steps you can self-host.

Skip it if
You want a pure-code framework.

Pricing
Self-hosted community edition free; paid cloud plans
unverified editorial summary, not yet confirmed on an official pricing page

Platforms
web · Self-host

Full review → n8n alternatives →
2
LangGraph
Stateful graph-based agent orchestration

open source A80/100

LangChain's low-level framework for building controllable, long-running multi-agent workflows.

Best for
You need production agents with explicit control flow and persistence.

Skip it if
You want a no-code tool or a quick script.

Pricing
LangSmith Developer $0/seat; Plus $39/seat/mo then pay-as-you-go
✓ verified on the official pricing page, Oct 18, 2026

Platforms
API · Python SDK · JS SDK

Full review → LangGraph alternatives →
3
OpenAI Agents SDK
Lightweight framework for multi-agent apps

open source A77/100

Open-source SDK with agents, handoffs, guardrails and tracing; works with many model providers.

Best for
You want a minimal, well-documented agent SDK.

Skip it if
You need a visual builder.

Pricing
Free and open source; pay for model usage
unverified editorial summary, not yet confirmed on an official pricing page

Platforms
Python SDK · JS SDK

Full review →
4
Claude Agent SDK
Build agents on the Claude Code harness

open source A76/100

Anthropic's SDK exposing the Claude Code agent loop, tools, and context management for custom agents.

Best for
You want Claude Code's proven agent loop inside your own product.

Skip it if
You need to use non-Claude models.

Pricing
Free SDK; pay for Claude API usage
unverified editorial summary, not yet confirmed on an official pricing page

Platforms
Python SDK · TypeScript SDK

Full review →
5
CrewAI
Role-based multi-agent framework

open source A76/100

Python framework and platform for crews of role-playing agents that collaborate on tasks.

Best for
You want multi-agent teams with minimal boilerplate.

Skip it if
You need fine-grained deterministic control.

Pricing
Open-source framework free; hosted platform paid
unverified editorial summary, not yet confirmed on an official pricing page

Platforms
Python SDK · web

Full review →
6
Dify
Open-source LLM app and agent builder

open source A75/100

Visual platform for building chatbots, RAG pipelines and agent workflows; self-hostable.

Best for
You want a visual LLM app builder you can self-host.

Skip it if
You prefer code-first frameworks.

Pricing
Sandbox free (200 message credits); Professional $590/workspace/yr; Team $1,590/yr
✓ verified on the official pricing page, Oct 18, 2026

Platforms
web · Self-host

Full review →
7
Pydantic AI
Type-safe Python agent framework

open source A74/100

Agent framework from the Pydantic team focused on typed outputs, dependency injection and observability.

Best for
You want type-safe, production-style Python agents.

Skip it if
You want built-in multi-agent role play.

Pricing
Framework is open source; Logfire Personal free; Team $49/mo
✓ verified on the official pricing page, Oct 18, 2026

Platforms
Python SDK

Full review →
8
Mastra
TypeScript agent framework

open source A73/100

Open-source TypeScript framework for agents, workflows, RAG and evals.

Best for
You build agents in TypeScript.

Skip it if
Your team is Python-only.

Pricing
Open-source framework; Mastra platform Starter $0/mo; Teams $250/mo
✓ verified on the official pricing page, Oct 18, 2026

Platforms
TypeScript SDK

Full review →
9
Zapier Agents
No-code AI agents across 8,000+ apps

B68/100

Agents that take actions across Zapier's huge app catalog, configured in plain language.

Best for
You want non-technical teammates building agents on existing apps.

Skip it if
You need complex logic or low cost at volume.

Pricing
Free plan; Professional from $19.99/mo; Agents Pro $33.33/mo billed annually
✓ verified on the official pricing page, Oct 18, 2026

Platforms
web

Full review →
10
Make
Visual automation platform with AI agents

B67/100

Visual scenario builder with thousands of app integrations and AI agent features.

Best for
You want affordable visual automation at scale.

Skip it if
You need code-level control.

Pricing
Free plan ($0); Core $9/mo; Pro $16/mo; Teams $29/mo (annual-billing prices)
✓ verified on the official pricing page, Oct 18, 2026

Platforms
web

Full review →
11
Gumloop
No-code AI automation and agent builder

B66/100

Drag-and-drop AI workflows and agents with built-in integrations, including browser automation.

Best for
You want no-code AI automations with strong scraping and browser tools.

Skip it if
You want to self-host.

Pricing
Pro from $37/mo with 14-day free trial; Enterprise custom
✓ verified on the official pricing page, Oct 18, 2026

Platforms
web

Full review →

Head-to-head comparisons

FAQ

What is the best AI tool for building AI agents and automations?

n8n ranks first with 85/100 (S-tier). Workflow automation with AI agent nodes. Use it when you want visual automations with AI steps you can self-host. Next in our ranking: LangGraph (80/100, A-tier) and OpenAI Agents SDK (77/100, A-tier).

Which AI tools for building AI agents and automations have a free tier?

In our pricing data, n8n (unverified), LangGraph (verified), OpenAI Agents SDK (unverified), Claude Agent SDK (unverified), CrewAI (unverified), Dify (verified), Pydantic AI (verified), Mastra (verified), Zapier Agents (verified) and Make (verified) list a free tier. "Unverified" means it is an editorial summary we have not yet confirmed on the vendor's official pricing page, so check the vendor before relying on it.

Are there open-source options for building AI agents and automations?

Yes. n8n, LangGraph, OpenAI Agents SDK, Claude Agent SDK, CrewAI, Dify, Pydantic AI and Mastra are listed as open source or open weights. Check each project's license before commercial use.

How are these tools ranked?

Each tool is scored out of 100 on our public rubric: job fit (30), ease (15), value (15), momentum (15), openness and portability (10), trust and maturity (10) and a builder/gamer bonus (5). S-tier is 85+, A-tier 70–84, B-tier 55–69 and C-tier below 55. Current scores are initial editorial estimates from public information, not hands-on tests, and sponsors can't buy points.

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