FellouAI / eko

Eko - Build Production-ready Agentic Workflow with Natural Language Eko (pronounced like 'echo') is a production-ready JavaScript framework that enables developers to create reliable agents, **from simple commands to complex workflows**. It provides a unified interface for running agents in both **computer and browser environments**. News • **2025-11:** Eko 4.0 supports chat conversations & optimizes agent logic. • **2025-09:** Eko 3.0 introduces dependency-aware parallel agent execution. • **2025-09:** New pause, resume, and interrupt controls with workflow recovery. • **2025-09:** Monorepo tooling migrated to pnpm for consistent workspace management. Upgrading to Eko 4.0 Follow these steps when moving an existing Eko 3.x project to 4.0: • Update dependencies with . • Regenerate saved workflows or exported plans so they use the v3 schema and dependency graph format. • Clean and reinstall using pnpm ( ), then rebuild any browser or desktop bundles. • Re-run automated demos and update documentation to reflect the new pause/interrupt APIs and parallel agent behavior. Framework Comparison | Feature | Eko | Langchain | Browser-use | Dify.ai | Coze | |--------------------------------------|-------|------------|--------------|----------|--------| | **Supported Platform** | **All platform** | Server side | Browser | Web | Web | | **One sentence to multi-step workflow** | ✅ | ❌ | ✅ | ❌ | ❌ | | **Intervenability** | ✅ | ✅ | ❌ | ❌ | ❌ | | **Task Parallel** | ✅ | ❌ | ❌ | ❌ | ❌ | | **Development Efficiency** | **High** | Low | Middle | Middle | Low | | **Task Complexity** | **High** | High | Low | Middle | Middle | Middle | | **Open-source** | ✅ | ✅ | ✅ | ✅ | ❌ | | **Access to private web resources** | ✅ | ❌ | ❌ | ❌ | ❌ | Features • [x] Pure JavaScript: Built for browsers and Node.js.🚀 • [x] Multi-Agent: Unleash power with multiple Agents in one task.📈 • [x] Agent/Tool Flexibility: Customize new Agents and Tools in just one line.🎉 • [x] Native MCP: Connects seamlessly with Awesome MCP Servers.🔗 • [x] Dynamic LLM: Balance speed and performance with flexible model choices.⚙️ • [x] Human-in-the-loop: Intervene when it matters most.🤝 • [x] Stream Planning: Dynamic rendering made easy.🎨 • [x] Loop & Listener Tasks: Automate any repetitive task.🤖 • [ ] Observable Chain: *Coming soon* • [ ] Native A2A: *Coming soon* Quickstart > **Note**: Please refer to the Eko Quickstart guide guide for full instructions on how to run it. > **Security Warning** > > DO NOT use API Keys in browser/frontend code! > > This will expose your credentials and may lead to unauthorized usage. > > Best Practices: Configure backend API proxy request through baseURL and request headers. > > Please refer to the link: https://eko.fellou.ai/docs/getting-started/configuration#web-environment Example Projects The repository ships with three workspace examples under the folder. Prerequisites Before running any example, install dependencies and build the core packages from the root directory: Browser Extension ( ) Load the generated directory via → Developer Mode → Load unpacked. Configure your API key in the extension options before running the automation task. Node.js Automation ( ) The Node.js demo drives Playwright through Eko; provide at least one model API key before running it. Web Login Demo ( ) This starts a React dev server on the default port with a simple login flow that you can automate with the browser or web agents. Use Cases • Browser automation and web scraping • System file and process management • Workflow automation • Data processing and organization • GUI automation • Multi-step task orchestration Documentation Visit our documentation site for: • Getting started guide • API reference • Usage examples • Best practices • Configuration options Development Environments Eko can be used in multiple environments: • Browser Extension • Web Applications • Node.js Applications Community and Support • Report issues on GitHub Issues License Eko is released under the MIT License. See the LICENSE file for details.