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Kilo Code

Open-source agentic engineering platform

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Open-source agentic AI coding platform for VS Code, JetBrains IDEs, CLI, Slack, and Cloud that combines inline autocomplete, browser automation, automated refactoring, and custom planning/coding/debugging modes. Operates on a plan-act-observe-fix loop with 500+ model support (Gemini, Claude, GPT via OpenRouter). Memory Bank feature maintains repo-resident context across sessions, and codebase indexing keeps the agent grounded in your project.

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Kilo Code is an open-source agentic AI coding platform for VS Code, JetBrains IDEs, the command line, Slack, and Cloud that combines inline autocomplete, browser automation, automated refactoring, and custom modes for planning, coding, and debugging into a single tool. It operates using a plan-act-observe-fix loop where it analyzes your repository to understand file structure and dependencies, plans the required steps, executes them by editing files and running terminal commands, and reviews output to fix issues automatically. Kilo Code addresses the need for a comprehensive AI coding agent that handles the full development workflow from design through implementation and debugging.

Kilo Code supports 500+ AI models including Gemini, Claude, and GPT families, and integrates with OpenRouter for flexible backend connections. Key differentiators include a Memory Bank that serves as a structured, repository-resident knowledge base helping the agent maintain context across sessions, codebase indexing for quickly locating relevant code and documentation, an MCP Server Marketplace for extending agent capabilities with external tools, and multiple built-in modes including Code, Ask, Architect, and Debug modes. The platform is the number one coding agent on OpenRouter with over 1.5 million users and 40T+ tokens processed.

Kilo Code is designed for developers who want a feature-rich, open-source alternative to commercial AI coding agents like Cursor and GitHub Copilot. It is particularly appealing for cost-conscious developers who want access to a wide range of AI models without being locked into a single provider. Compared to Cline and Roo Code, Kilo Code offers broader IDE support with JetBrains and CLI availability, a built-in MCP marketplace, and the Memory Bank feature that helps maintain persistent context across coding sessions.

Pricing

Free OSS/BYOK; Teams $15/user/mo; Kilo Pass from $19/mo; KiloClaw from $55/mo

Platforms

VS Code, JetBrains, CLI

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Alternatives

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Cline

Open-source autonomous coding agent for VS Code

Cline is an Apache-2.0 open-source AI coding agent runtime for editor, terminal, and SDK workflows. It reads and edits files, runs commands, uses browsers, plans then acts, and requires explicit approval for each step unless users enable auto-approve. Current Cline sources show 8M+ installs, 63.6k+ GitHub stars, BYOK/provider flexibility, local model support, MCP, plugins, hooks, and Enterprise governance.

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Continue logo

Continue

Dead

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Continue was a model-agnostic open-source AI coding assistant for VS Code and JetBrains. Its official site now says Continue has been acquired by Cursor, so this aicoolies entry is kept as historical/graveyard context rather than an active standalone recommendation.

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Spec-driven agentic AI IDE from AWS, built on Code OSS (the VS Code foundation), that transforms ad-hoc prompting into a structured workflow by auto-generating requirements documents, design specs, and implementation plans before writing code. Kiro keeps AI-written code tied to explicit acceptance criteria defined up front.

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Serena is a free, open-source coding agent toolkit that provides IDE-like semantic code retrieval and editing capabilities to any LLM via the Model Context Protocol (MCP). Built on Language Server Protocol (LSP) integration, it enables symbol-level navigation, cross-file refactoring, and relational code understanding across Python, TypeScript, Go, Rust, Java, PHP, and more — without requiring file-level reads or text-based search.

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