108 Free AI Tools to Build AI Agents (2026)
The best free AI tools to build AI agents, ranked by our checks. Last checked 18 Oct 2026.
Ranked AI tools you can use to build AI agents. Each listing shows verified free-tier details from the vendor pricing page; picks require at least one month of free access (free plan, monthly credits, or a trial of 30+ days).
108 free tools
Cursor
AI code editor with agents, tab completion, and chat for full-stack development.
Free forever, Limited agent and chat requests
Free accountTry
Zapier
No-code automation connecting 7k+ apps with AI actions and agents.
Free forever, 100 tasks/month, unlimited two-step Zaps
Free accountTry
Make
Visual scenario builder for integrations with OpenAI and data modules.
Free forever, 1,000 credits/month
Free accountTry
Botpress
Build LLM chatbots and autonomous agents with visual Studio.
Free forever, 100 conversations, 3 seats, 3 AI agents
Free accountTry
HubSpot Service Hub
Free ticketing, shared inbox, and AI customer agent tools.
Free forever, Free $0/mo for up to 2 users
Free accountTry
Activepieces
Open-source Zapier alternative with AI agents.
Free forever, Open-source self-hosted edition free
Free accountTry
Pipedream
Connect APIs and AI with code-level workflows and agents.
Free forever, Limited daily credits
Free accountTry
Skyvern
AI browser automation for workflows on any website.
Free forever, Open source; cloud free credits on signup
Free accountTry
Clay
Data enrichment and AI research agents for outbound sales.
Free forever, 6,000 actions a year and 1,200 data credits a year, up to 200 rows per table, unlimited seats and tables; no phone number enrichment
Free accountTryYou.com
Web search and research APIs for AI agents, with a free MCP tier.
Free forever, Up to 100 Web Search API queries a day through the MCP server
No signupTry
Freebuff
Ad-supported free AI coding agent for the terminal, desktop, web and GitHub repos.
Free forever, Free $0/month plan funded by text ads: free hours refilled daily (30 hours a day shown on the plans page for full access; 5 hours a day in limited mode, 4 on a VPN or proxy)
Free accountTry
n8n
Workflow automation with AI nodes; self-host free or use n8n cloud trial.
Free forever, Free self-hosted Community Edition; cloud plans from $20/mo with a free trial
Self-hostTry
Kilo Code
Open-source AI coding agent for VS Code and JetBrains.
Free forever, Open-source extension, pay only for model usage
Self-hostTry
Zed
High-performance code editor with built-in AI agent.
Free forever, Editor free forever with limited AI prompts
Free accountTry
Dify
Open LLM app platform for agents, RAG workflows, and observability.
Free forever, Sandbox (free): 200 message credits, 5 apps, 1 member
Free accountTry
Emergent
Agentic vibe-coding platform that builds and deploys full-stack apps.
Free forever, Monthly credits to try the agent
Free accountTry
Kiro
Agentic IDE from AWS with spec-driven development.
Free forever, Limited monthly credits
Free accountTry
JetBrains AI
AI assistant and Junie agent built into JetBrains IDEs.
Free forever, Unlimited local completion and limited cloud AI credits
Free accountTryCrewAI
Platform and open-source framework for multi-agent automations.
Free forever, Limited monthly executions; open-source framework free
Free accountTry
StackAI
Enterprise no-code platform to build AI agents. Acquired by Asana.
Free forever, Limited runs per month
Free accountTry
MindStudio
Visual builder for AI agents and automations using 200+ models.
Free forever, Build and run AI agents with included usage
Free accountTry
IFTTT
Connect apps and devices with simple automations and AI.
Free forever, Limited applets
Free accountTry
Integrately
One-click integrations and automations between apps.
Free forever, 100 tasks/month
Free accountTry
LangSmith
Observability, evals and deployment for LLM agents.
Free forever, Free Developer plan: 5k traces per month
Free accountTry
GDevelop
No-code game engine with an AI agent.
Free forever, Free plan with limited AI requests
Free accountTry
Chatwoot
Open-source customer support with AI agent.
Free forever, Open-source and free cloud plan
Free accountTry
Devin Desktop
Cognition's agent editor (formerly Windsurf, earlier Codeium): run local and cloud coding agents next to a full IDE with Tab completions and inline edits.
Free forever, Light quota to code with agents, limited model availability, unlimited inline edits and Tab completions
Free accountTry
Continue (acquired by Cursor)
Open-source (Apache-2.0) AI coding agent for VS Code/JetBrains; the company joined Cursor and the codebase remains freely available.
Free forever, Open-source (Apache-2.0) extension only; the hosted Continue service is wound down (user data deleted, recurring billing disabled). Bring your own model keys
Self-hostTry
Langflow
Visual builder for LangChain flows and tool-using agents.
Free forever, Open-source and free to self-host
Self-hostTry
Undermind
Deep literature search agent for biomedical and technical domains.
Free forever, Free $0 for exploratory research
Free accountTry
Macaly
Build websites and web apps by chatting with an AI agent.
Free forever, Limited messages to build and publish sites
Free accountTry
Cline
Open-source autonomous coding agent for VS Code and JetBrains.
Free forever, Open-source extension, bring your own API key
Self-hostTry
Lyzr
Enterprise agent platform for building AI agents.
Free forever, Monthly credits on Lyzr Studio
Free accountTry
OpenCode
Open-source AI coding agent for the terminal, desktop and IDE.
Free forever, Open-source agent (MIT license), free to install; use your own provider keys or subscription, and some OpenCode Zen models are free for a limited time
Self-hostTry
Replit
Cloud IDE with Replit Agent to scaffold, edit, and deploy apps from prompts.
Free forever, Free Mode: brainstorm and create without token costs; first prompt free
Free accountTry
Browser Use
Make websites accessible for AI agents with browser automation.
Free plan, Free: open-source library; cloud free credits
Promo creditTry
