15 open source AI agent and automation tools. All have a free plan. Half of the paid plans start at $39 a month or less. Newest check: 11 Nov 2026.
268 of 721 tools were checked against the vendor's own page in the last 30 days.
| Tool | Price from | Free plan | Runs on | Rating | Checked |
|---|---|---|---|---|---|
| HeyClickyDesktop AI buddy for Mac and Windows that sees your screen on a hotkey, talks you through any app and runs agents you start by voice. Y Combinator Spring 2026. Free plan, plus Pro and Max. | $20/mo | Yes | Mac · Windows | 4.1 | 11 Nov |
| InngestInngest runs event-driven background jobs and AI workflows with no queue or worker fleet to manage. A Free plan that needs no credit card covers development and small production apps. | $99/mo | Yes | Web | 4.1 | 29 Sep |
| Trigger.devOpen-source TypeScript platform for durable background jobs and AI agents. Checkpoint-resume execution survives crashes and redeploys, auto-retries, real-time traces. Free tier available. | $10/mo | Yes | Web | 4.0 | 22 Sep |
| DBOSOpen-source durable execution library that keeps workflow state in Postgres, with SDKs for five language families and a paid Conductor console. | $99/mo | Yes | Web | 3.6 | 8 Nov |
| LangGraphMIT-licensed Python framework for stateful, multi-step AI agents built as graphs, with human-in-the-loop approvals. Library is free; hosted option is paid. | $39/mo | Yes | -- | 3.6 | 30 Oct |
| AtomsMulti-agent AI app builder that deploys specialized AI agents (PM, Engineer, Data Scientist) to build full-stack apps from text; plans from free to $100/month. | $20/mo | Yes | Web | -- | 19 Aug |
| Cloudflare OSCloudflare OS is Cloudflare's open-source, self-hosted AI agent workspace that passed 6,000 GitHub stars within 2 days of its August 2026 launch. | Free | Yes | Web | -- | 17 Aug |
| CrewAIOpen-source Python framework for multi-agent AI, MIT-licensed with about 59.6K GitHub stars, plus the CrewAI AMP platform for building and governing agents. | -- | Yes | Web | -- | 13 Oct |
| LangChainObserve, evaluate, and deploy reliable AI agents | $39/mo | Yes | Web · Mac · Windows | -- | 29 Sep |
| LettaOpen-source agent platform from the MemGPT team. Agents remember across chats, run in a CLI, web app or SDK, and reply on Slack, Telegram and more. | $20/mo | Yes | Web | -- | 26 Oct |
| LlamaIndexThe world's most accurate agentic OCR and document-specific AI workflows for enterprise automation | Free | Yes | Web | -- | 19 Aug |
| MastraOpen-source TypeScript framework for building AI agents and workflows, routing to 90+ model providers through one interface. | $250/mo | Yes | Web · Mac · Windows | -- | 19 Aug |
| n8nAI workflow automation platform for technical teams | -- | Yes | Web | -- | 26 Aug |
| SuperAGIOpen-source autonomous AI agent framework and AI Super App for work, backed by $15M. Lets dev teams build, deploy, and manage multi-agent workflows with a built-in CRM and AI SDR. | $49/mo | Yes | Web | -- | 19 Aug |
| LLMStackNo-code AI agent and workflow builder connecting LLM models to your data. Integrates OpenAI, Cohere, and Hugging Face, with a free tier and paid production plans. Deploy to the cloud or self-host on-premise. | $50/mo | Yes | Web | 3.3 | 24 Sep |
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