Best Free AI Agent Builders

Free AI agent builders fall into two camps: genuinely free tools you self-host (n8n Community Edition, Dify, Langflow) and free tiers of hosted platforms (MindStudio, Make, Zapier, Botpress, StackAI) that cap your usage. The best free AI agent builder overall is n8n, because its self-hosted Community Edition has no usage caps and its AI Agent node is a first-class feature; the best free hosted plan for non-technical users is MindStudio, with one agent and 1,000 runs per month at $0.

How we chose the best free AI agent builders

We ranked these tools on published pricing and features from each vendor’s own site: what the free option actually includes, what it costs when you outgrow it, and who each tool fits. Every number below links to the vendor’s pricing page.

We have not run hands-on tests of every free tier yet — our testing notes are pending — so treat the rankings as a shortlist based on documented limits, not benchmark results. Where a vendor doesn’t publish a price, we say so.

Which are the best free AI agent builders?

1. n8n — best free AI agent builder overall

Best for: technical operators and agencies who want to self-host, and teams that need auditable agents mixed with deterministic logic. Free option: self-hosted Community Edition, free on GitHub. Starting price when you outgrow it: €20/month (Starter, billed annually), per n8n’s pricing page.

n8n gives you a visual canvas where the AI Agent node is a first-class building block: you give the agent a model, memory and tools, and mix it with deterministic steps. According to n8n’s AI agents page, agents can use 600+ native integrations plus your own workflows as tools, you can replay any run to see where it broke, and you can require human approval for specific tool calls.

The free Community Edition is the standard self-hosted version — you bring the server and the LLM API keys. If you’d rather have n8n host it, cloud pricing is based on workflow executions (one full run counts once, regardless of steps), which makes multi-step agent runs easier to predict than per-task billing. All paid plans include unlimited users, unlimited workflows and every integration, per the pricing page.

Honest limitation: n8n is not a chat-only “describe it and done” assistant. Complete beginners will face a learning curve with the canvas, and self-hosting means you own the maintenance.

2. MindStudio — best free plan for non-technical builders

Best for: non-technical builders, consultants and agencies prototyping client agents. Free option: one agent, 1,000 runs/month, 200+ models via the Service Router. Starting price when you outgrow it: $20/month plus usage (Individual), per MindStudio’s pricing page.

MindStudio has the lowest-friction free start on this list. Its Service Router connects you to 200+ AI models without requiring your own API keys (you can bring your own if you prefer), and the pricing page states your data is never used for training. The Individual plan at $20/month plus usage removes the agent and run caps, and yearly billing saves 20%.

Honest limitation: MindStudio is not the pick for workflows that need thousands of app integrations out of the box — Zapier’s 9,000+ app catalogue is far broader.

3. Dify — best free self-hosted option for knowledge agents

Best for: teams building RAG and knowledge-base agents, and companies needing VPC or self-hosting. Free option: free Sandbox cloud plan, plus free self-hosting with Docker. Starting price when you outgrow it: Professional and Team cloud plans — see Dify’s pricing page for current prices.

Dify is a source-available platform for agentic workflows and RAG pipelines, deployable on Dify’s cloud, in your VPC or self-hosted with Docker. Dify cites 159K+ GitHub stars on its site. The free Sandbox lets you try the cloud version; paid cloud plans are billed in message credits (Professional includes 5,000 credits/month, 500 knowledge documents and 5 GB of storage; Team includes 10,000 credits, 1,000 documents and 20 GB), and annual billing saves 17%.

Honest limitation: Dify doesn’t publish exact Professional and Team prices in the material we’ve reviewed, and it’s aimed at developers and technical PMs — non-technical users who want an assistant out of the box should look at MindStudio.

4. Langflow — best free open-source builder for developers

Best for: developers and technical teams, RAG and agent prototypes that will grow into production, and building MCP servers visually. Free option: fully free and open source; a free cloud account is also available. Starting price when you outgrow it: free — Langflow’s model is open source with cloud deployment available, per the Langflow site.

Langflow is an open-source visual builder for AI agents and MCP servers. It supports all major LLMs and vector databases, ships hundreds of pre-built flows and components, and every component is Python under the hood — so you keep code-level control. The same Langflow runs self-hosted or on its cloud (version 1.13 when we checked).

Honest limitation: Langflow is the most developer-friendly tool here, which also means it’s not for non-technical business users. If nobody on your team writes Python, start elsewhere.

5. Make — best free tier for visual automation with agent steps

Best for: visual thinkers who want to see agent reasoning, and SMBs already using Make scenarios. Free option: 1,000 credits/month and one data store. Starting price when you outgrow it: credit-based Core, Pro and Teams plans — see Make’s pricing page.

Make adds AI agents to its visual scenario builder, and its standout feature is transparency: a Reasoning panel shows every decision the agent makes, step by step, on the canvas. Agents connect to 3,500+ pre-built apps, per Make’s AI agents page. On billing, most actions use one credit and some AI features use more; router and error-handler modules don’t consume credits. Make’s own guidance is useful: use automation when a workflow just needs doing, and an agent when it needs judgment.

Honest limitation: there’s no self-hosting, and if you run out of credits your scenarios pause — incoming webhooks queue only up to your plan’s limit.

6. Zapier Agents — best free tier if you already live in Zapier

Best for: teams already using Zapier who need the widest app coverage. Free option: Zapier Free plan with 100 tasks/month, two-step Zaps and Zapier Copilot. Starting price when you outgrow it: Professional from $19.99/month, with Agents priced as an add-on — see the Agents tab on Zapier’s pricing page.

Zapier Agents lets you build AI teammates that act across 9,000+ apps, reusing your existing Zapier connections. Zapier’s examples include a lead-enrichment agent, an IT helpdesk Slack responder and a support-email agent that drafts replies from your knowledge base. All AI steps, code and SDK usage draw from one shared task pool, and yearly billing saves 33% versus monthly.

Honest limitation: Agents is an add-on, not part of the free plan, and per-task billing can add up on high-volume multi-step runs. There’s also no self-hosting — see our n8n vs Zapier Agents comparison for the control-vs-convenience trade-off.

7. Botpress — best free tier for customer support agents

Best for: customer support teams and agencies building chat agents for clients. Free option: a free plan with hard-capped storage and no add-ons. Starting price when you outgrow it: $150/month (Plus) with 250 conversations and $25 of AI usage included, per Botpress’s pricing page.

Botpress is an AI-native customer support platform whose agents take real actions — refunds, account updates, multi-step workflows. It prices by conversation rather than seat: a conversation counts when an end user sends at least two messages in a billing month, and paid plans include AI usage in the price. The jump from free to $150/month is steep, but the pricing model is predictable.

Honest limitation: Botpress is built for customer conversations, not internal back-office automation, and very low budgets will feel the gap between the free plan and Plus. For a support-focused shortlist, see our guide to the best AI customer support agent builders.

How do the free AI agent builders compare?

Prices and limits are from each vendor’s pricing page, linked in the entries above. One more option worth knowing: StackAI offers a free plan with 500 runs per month and community support on Discord, but its real focus is custom Enterprise contracts with SOC 2, HIPAA and GDPR compliance — and its homepage announces Asana has acquired StackAI, so watch how the roadmap changes.

Which free AI agent builder should you choose?

Follow these steps:

1. Decide hosted vs self-hosted. If you can run Docker or a server, n8n Community Edition, Dify and Langflow are free with no vendor usage caps. If you can’t, pick a hosted free tier.
2. Match the tool to the job. Customer conversations: Botpress. App-to-app automation with some judgment: Make or Zapier. Knowledge-heavy agents: Dify. General-purpose agents with approvals and replay: n8n.
3. Check the ceiling, not just the floor. Illustrative example: a 5-person agency prototyping client agents might start on MindStudio’s free plan, then pay $20/month plus usage for unlimited agents — cheaper than rebuilding elsewhere. A solo founder automating support email might outgrow Zapier’s 100 free tasks in a week.
4. Budget for model usage. On self-hosted tools you pay your LLM provider directly; on MindStudio, usage is billed on top of the plan.

For broader shortlists, see our guides to the best no-code AI agent builders, the best self-hosted AI agent builders and the open-source and self-hosted category.

Bottom line

n8n is the best free AI agent builder for most people: a genuinely free self-hosted Community Edition, execution-based cloud pricing from €20/month, and agents you can audit and approve. If you want hosted and non-technical, start with MindStudio’s free plan; if you want open source and write Python, choose Langflow or Dify. Our hands-on testing of these free tiers is pending, so verify current limits on each vendor’s pricing page before you commit.

What to ask next:

• Which is better for my workflow, n8n or Make?
• What are the best self-hosted AI agent builders?
• Which AI agent builders work best for customer support?