Which AI tools for building AI agents are free?

LangGraph (free), CrewAI (free), Pomerado (limited free tier), Chatway (limited free tier), Exa (limited free tier) and Composio (generous free tier). n8n and Mistral Voxtral 3 don't have a free tier.

Which has the cheapest paid plan?

Of the prices we could read on official pages, Exa starts lowest at $4 per 1,000 searches, pay as you go with no subscription. We couldn't verify a price for CrewAI.

How did you check these free tiers?

We compared all 8 free-tier notes on this page against each tool's official pricing page, or another official page, most recently on Oct 22, 2026. Each checked tool links to the page we used.

Which tool should I pick?

n8n is the pick for technical automators. LangGraph is for building custom agents in code. CrewAI is for building multi-agent setups. See the full list below.

← All use cases

Agents and automation

Best AI tools for building AI agents

8 tools for builders and vibe coders. Filter by what you're willing to pay.

Our shortlist for building AI agents is n8n, LangGraph, CrewAI, Pomerado, Chatway, Exa, Composio and Mistral Voxtral 3. 6 of the 8 have a free plan or free tier, and we checked all 8 free-tier notes against official pricing pages or other official pages. If you want to start for free, try LangGraph, CrewAI and Composio first.

n8n, one of the 8 tools here. Screenshot of its homepage, Oct 20, 2026.

If a tool is tagged "Affiliate link: we may earn a commission," we may get paid when you sign up through our link. It costs you nothing extra. How we order tools · How we make money

n8n (opens in a new tab)
Workflow automation with AI agent nodes, self-hostable
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Good for technical automators
Pricing Cloud: free trial, no card, from $20/month; self-hosted Community Edition is free
Pricing details & sources
Checked Oct 20, 2026 on the official pricing page for n8n (opens in a new tab).
Trial onlyPricing checked · Oct 20, 2026 · source for n8n's pricing (opens in a new tab)$20/mo billed annually ($24 monthly) for 2,500 executions (Starter)
LangGraph (opens in a new tab)
Framework for stateful agent workflows
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Good for building custom agents in code
Pricing Open-source framework; LangSmith Developer $0 with 5K traces/month
Pricing details & sources
Checked Oct 13, 2026 on the official pricing page for LangGraph (opens in a new tab).
FreePricing checked · Oct 13, 2026 · source for LangGraph's pricing (opens in a new tab)$39/mo lowest paid tier
CrewAI (opens in a new tab)
Multi-agent orchestration framework/platform
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Good for building multi-agent setups
Pricing Open-source framework; hosted Basic plan free
Pricing details & sources
Checked Oct 13, 2026 on the official pricing page for CrewAI (opens in a new tab).
FreePricing checked · Oct 13, 2026 · source for CrewAI's pricing (opens in a new tab)Price unverified
Pomerado (opens in a new tab)
Turns a website into an API or MCP tool your agent can call, so it stops clicking through pages in a browser every time
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Good for letting Claude Code or Codex use sites that have no API
Pricing Free $0/month: 100 tool calls a day and 10 new integrations a month; Premium $50/month raises that to 1,000 calls and 100 integrations
Pricing details & sources
Checked Oct 16, 2026 on its homepage for Pomerado (opens in a new tab).
Limited free tierPricing checked · Oct 16, 2026 · source for Pomerado's pricing (opens in a new tab)$50/mo Premium
Chatway (opens in a new tab)
Live chat for your website that now lets your own agent, like Claude Code, Codex or Cursor, reply to customers over MCP
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Good for small teams who want an agent helping with support chat
Pricing Free forever: 1 seat, 50 conversations a month (MCP and API replies count), 30 days of history
Pricing details & sources
Checked Oct 16, 2026 on the official pricing page for Chatway (opens in a new tab).
Limited free tierPricing checked · Oct 16, 2026 · source for Chatway's pricing (opens in a new tab)$39/mo Business, or $31/mo billed yearly
Exa (opens in a new tab)
Web search API built for AI agents: live search, page contents, cited answers and deep research
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Good for giving your agent or app real-time web search
Pricing $10 of free credits every month (up to 2,500 Lite searches), no card needed
Pricing details & sources
Checked Oct 20, 2026 on the official pricing page for Exa (opens in a new tab).
Limited free tierPricing checked · Oct 20, 2026 · source for Exa's pricing (opens in a new tab)$4 per 1,000 searches, pay as you go with no subscription
Composio (opens in a new tab)
Lets AI agents use 1,500+ apps and APIs, with sign-ins, triggers and MCP handled for you
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Good for agents that need to send email, update a CRM or call paid APIs without wiring up each one
Pricing Hobby plan is free: 100,000 tool calls and 50,000 triggers a month, 3 team members, no card; usage pauses at the cap
Pricing details & sources
Checked Oct 20, 2026 on the official pricing page for Composio (opens in a new tab).
Generous free tierPricing checked · Oct 20, 2026 · source for Composio's pricing (opens in a new tab)$29/mo Pro, includes $29 of usage
Mistral Voxtral 3 (opens in a new tab)
Speech-to-text and text-to-speech models from Mistral, plus a voice-agent SDK for phone and web voice agents
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Good for adding voice to an agent or app
Pricing No free Voxtral usage on Mistral's pricing pages. You pay per use on the Mistral API: transcription from $0.0035 a minute, the voice agent API from $0.04 a minute, and text-to-speech at $13 per 1M characters
Pricing details & sources
Checked Oct 22, 2026 on the official pricing page for Mistral Voxtral 3 (opens in a new tab).
Paid onlyPricing checked · Oct 22, 2026 · source for Mistral Voxtral 3's pricing (opens in a new tab)pay per use, no monthly plan

How to choose

Start with what you're willing to pay. LangGraph, CrewAI and Composio are tagged free or generous free tier. Pomerado, Chatway and Exa have a limited free tier. n8n and Mistral Voxtral 3 need a trial or a paid plan.

Where we could read a price on an official page, the lowest paid plans start at: n8n $20/mo billed annually ($24 monthly) for 2,500 executions (Starter); LangGraph $39/mo; Pomerado $50/mo Premium; Chatway $39/mo Business, or $31/mo billed yearly; Exa $4 per 1,000 searches, pay as you go with no subscription; Composio $29/mo Pro, includes $29 of usage; Mistral Voxtral 3 pay per use, no monthly plan. Prices change often, and we don't always know whether a figure is billed monthly or annually, so confirm on the tool's site.

n8n is the pick for technical automators: workflow automation with AI agent nodes, self-hostable. Free tier: Cloud: free trial, no card, from $20/month; self-hosted Community Edition is free.
LangGraph is for building custom agents in code: framework for stateful agent workflows. Free tier: open-source framework; LangSmith Developer $0 with 5K traces/month.
CrewAI is for building multi-agent setups: multi-agent orchestration framework/platform. Free tier: open-source framework; hosted Basic plan free.
Pomerado is for letting Claude Code or Codex use sites that have no API: turns a website into an API or MCP tool your agent can call, so it stops clicking through pages in a browser every time. Free tier: free $0/month: 100 tool calls a day and 10 new integrations a month; Premium $50/month raises that to 1,000 calls and 100 integrations.
Chatway is for small teams who want an agent helping with support chat: live chat for your website that now lets your own agent, like Claude Code, Codex or Cursor, reply to customers over MCP. Free tier: free forever: 1 seat, 50 conversations a month (MCP and API replies count), 30 days of history.
Exa is for giving your agent or app real-time web search: web search API built for AI agents: live search, page contents, cited answers and deep research. Free tier: $10 of free credits every month (up to 2,500 Lite searches), no card needed.
Composio is for agents that need to send email, update a CRM or call paid APIs without wiring up each one: lets AI agents use 1,500+ apps and APIs, with sign-ins, triggers and MCP handled for you. Free tier: Hobby plan is free: 100,000 tool calls and 50,000 triggers a month, 3 team members, no card; usage pauses at the cap.
Mistral Voxtral 3 is for adding voice to an agent or app: speech-to-text and text-to-speech models from Mistral, plus a voice-agent SDK for phone and web voice agents. Free tier: no free Voxtral usage on Mistral's pricing pages. You pay per use on the Mistral API: transcription from $0.0035 a minute, the voice agent API from $0.04 a minute, and text-to-speech at $13 per 1M characters.

Comparing n8n with Zapier and Make? See what the same workflow costs on each.

Free tiers last checked Oct 22, 2026 against each tool's official pricing page, or another official page (linked on each tool). Prices change often, so confirm on the tool's site.

Questions

Which AI tools for building AI agents are free?: LangGraph (free), CrewAI (free), Pomerado (limited free tier), Chatway (limited free tier), Exa (limited free tier) and Composio (generous free tier). n8n and Mistral Voxtral 3 don't have a free tier.
Which has the cheapest paid plan?: Of the prices we could read on official pages, Exa starts lowest at $4 per 1,000 searches, pay as you go with no subscription. We couldn't verify a price for CrewAI.
How did you check these free tiers?: We compared all 8 free-tier notes on this page against each tool's official pricing page, or another official page, most recently on Oct 22, 2026. Each checked tool links to the page we used.
Which tool should I pick?: n8n is the pick for technical automators. LangGraph is for building custom agents in code. CrewAI is for building multi-agent setups. See the full list below.

Disclosure: some links on StackDrop are affiliate links. If you sign up or buy through them, we may earn a commission at no extra cost to you. Tools in a "Featured" box labeled Sponsored are paid placements. They're shown separately from our regular listings. How we choose and order tools.

8 tools for building AI agents

How to choose

Questions