8 Best Open Source Antigravity Alternatives
A curated collection of the 8 best open source and self-hosted alternatives to Antigravity in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Antigravity in 2026? The top open-source alternative is OpenCode — Open source AI coding agent for developers.
Other highly rated open-source Antigravity alternatives include pi, Zed and Cline.
Open source AI coding agent for developers
OpenCode is an open-source AI coding agent designed to help developers write, debug, and manage code efficiently. It integrates seamlessly with your terminal, IDE, or desktop app, providing real-time assistance powered by advanced AI models. - Multi-Model Support: Connect to any AI model from providers like Claude, GPT, or Gemini, or use local models. - LSP Integration: Automatically loads the right Language Server Protocols (LSPs) for the LLM to enhance coding accuracy. - Multi-Session Workflows: Run multiple agents in parallel on the same project for complex tasks. - Shareable Sessions: Generate shareable links for debugging or reference, ideal for team collaboration. - Editor Agnostic: Available as a terminal interface, desktop app (macOS, Windows, Linux), and IDE extensions. - Privacy-First Design: Does not store your code or context data, ensuring compliance with sensitive environments. - GitHub Copilot Integration: Log in with GitHub to use your existing Copilot account. - OpenAI Integration: Use your ChatGPT Plus or Pro account directly within OpenCode. - Zen Models: Access handpicked, benchmarked models optimized specifically for coding agents. OpenCode is open-source and can be self-hosted for full control over your data and infrastructure. It supports integration with 75+ LLM providers through Models.dev, including local model deployment. The desktop app is available for macOS, Windows, and Linux, while the terminal interface and IDE extensions provide flexibility across development environments.
Minimal terminal-based AI coding agent
Pi is a minimal agent harness designed for developers who want to adapt AI workflows to their own processes rather than the other way around. It runs in the terminal and offers powerful customization through extensions, skills, prompt templates, and themes. - Minimal & Customizable: Skip bloated features like sub-agents and plan mode. Build exactly what you need. - Multi-Model Support: Switch between 15+ providers (Anthropic, OpenAI, Google, Ollama, etc.) mid-session with /model or Ctrl+L. - Tree-Structured History: Sessions are stored as trees. Navigate to any prior point with /tree, export to HTML, or share via GitHub gist. - Context Engineering: Load project-specific instructions via AGENTS.md, SYSTEM.md, and skills. Customize compaction strategies. - Four Operational Modes: Interactive, print/JSON, RPC, and SDK for programmatic usage. - Extensible Architecture: Add custom providers, models, and UI tweaks via extensions. Bundle as Pi packages and share via npm or git. - Token Efficiency: Minimal system prompt ensures efficient token usage. Pi is open source and can be self-hosted. Installation options include: bash curl -fsSL https://pi.dev/install.sh | sh powershell -c "irm https://pi.dev/install.ps1 | iex" npm install -g --ignore-scripts @earendil-works/pi-coding-agent pnpm add -g --ignore-scripts @earendil-works/pi-coding-agent bun add -g --ignore-scripts @earendil-works/pi-coding-agent Pi supports custom installations and can be extended with third-party packages like @termdraw/pi for enhanced TUI capabilities.
High-performance, multiplayer code editor
Zed is a high-performance, multiplayer code editor crafted for speed and collaboration with humans and AI. Built from scratch in Rust to efficiently leverage multiple CPU cores and your GPU, Zed delivers native-speed performance for editing, navigating code, and running tools. - Blazing Fast: Written in Rust to maximize CPU/GPU utilization and deliver native-speed performance. - Multiplayer Collaboration: Code together in real-time with teammates, chat, and screen sharing. - AI Agent Support: Run agents in parallel for intelligent code editing, navigation, and tool execution. - Cross-Platform: Available for macOS, Linux, and Windows. - Minimalist Design: Focused on speed and efficiency without unnecessary bloat. - Extensions Ecosystem: Extend functionality with a growing library of extensions. - Built-in AI Tools: Native support for AI-powered coding assistance and automation. Zed is open-source and self-hostable, with the core editor and collaboration features available for deployment. The Rust-based architecture ensures high performance and scalability. For teams, Zed offers business plans with advanced collaboration and AI features.
Open-source AI coding agent for developers
Cline is an open-source AI coding agent designed to help developers understand, refactor, and automate codebases directly within their IDE, terminal, or SDK. It supports Plan and Act modes for strategic execution, integrates with MCP for tool access, and works with any model—Claude, GPT, Gemini, or local models like Ollama. - Cross-Platform Edits: Coordinated multi-file changes with linter-aware fixes, diffs, and one-click undo. - Terminal Execution: Runs bash commands and reacts to output in real-time, handling long-running processes like dev servers and tests. - Plan & Act Modes: Toggle Plan mode to align on strategy, then Act to execute with approval or autopilot. - Custom Rules & Skills: Define .clinerules to teach the agent your coding standards, architecture, and deployment conventions. - Model Flexibility: Use any model—Claude, GPT, Gemini, local Ollama/LM Studio, or OpenAI-compatible endpoints. Bring your own keys or weights. - MCP Integration: Extend functionality with the Model Context Protocol (MCP) for tool access and custom workflows. - IDE & CLI Support: Works in VS Code, JetBrains, Cursor, Windsurf, and via CLI for scripts, cron jobs, and CI pipelines. - Enterprise Ready: Trusted by global enterprises like Samsung, Salesforce, Oracle, Amazon, and Microsoft. Cline is open-source (Apache 2.0) and can be self-hosted. It supports local model integration (e.g., Ollama, LM Studio) and is compatible with any OpenAI-compatible endpoint. The CLI and SDK allow embedding Cline in custom workflows or products.
Open-source coding agent for developers
Continue was an open-source coding agent designed to amplify developers rather than replace them. The project has been acquired by Cursor, but its open-source codebase remains freely available as a foundation for others. - Open-source coding agent for developers - Focused on amplifying developer productivity - Extensible and customizable architecture - Community-driven development model - Remains available as an open-source foundation post-acquisition - Open-source codebase available on GitHub - Self-hosting options remain viable - Compatible with various development environments
Open source AI coding agent with 500+ models, bring-your-own-key support, and specialized modes for writing, debugging, and planning code across IDEs and CLI.
Open source AI coding agent with 500+ models, bring-your-own-key support, and specialized modes for writing, debugging, and planning code across IDEs and CLI.
Native macOS code editor built in Swift
CodeEdit is a lightweight, natively-built code editor designed exclusively for macOS. Developed entirely in Swift, it leverages the full power of Apple hardware for unmatched performance and reliability. - macOS Native: Built from the ground up for macOS using Swift, ensuring optimal performance and integration. - Lightweight Yet Powerful: Designed to be lean while offering limitless potential for customization and extensibility. - Open Source: Completely open source, allowing developers to contribute, modify, or extend functionality. - Extensible & Customizable: Tailor the editor to your workflow with a familiar and intuitive user interface. - Familiar UI: Designed for ease-of-use and productivity, ensuring a smooth user experience. - Better Tools: Includes tools to keep you connected to your code and improve your workflow efficiency. - Community-Driven: Actively shaped by its community, with contributions from developers worldwide. CodeEdit is a desktop application built for macOS and does not require self-hosting. The source code is available on GitHub for contributions and customization.
AI-powered developer platform for code hosting and collaboration
GitHub is the leading platform for software development, offering version control, project management, and collaboration tools. Built for developers, teams, and enterprises, it combines Git hosting with AI-powered features like GitHub Copilot for code generation and advanced security tools to streamline development workflows. - AI-Powered Development: GitHub Copilot for AI-assisted code writing and refactoring - Code Hosting & Version Control: Git repository management with pull requests and branching - Automated Workflows: GitHub Actions for CI/CD and workflow automation - Code Security: Advanced Security features for vulnerability detection and secret protection - Dev Environments: Codespaces for instant cloud-based development environments - Project Management: Issues, project boards, and tracking for agile workflows - Collaboration Tools: Team-based code reviews, discussions, and documentation - Enterprise Solutions: Scalable platform with premium support and security features GitHub is a cloud-based platform with no self-hosting option. It provides enterprise-grade security, compliance certifications (including SOC 2, ISO 27001), and GDPR compliance. The platform is built and maintained by GitHub, Inc. (a Microsoft subsidiary) with data centers globally.
About Antigravity
Google Antigravity
Google Antigravity is Google's agentic development platform, enabling developers to build, manage, and automate AI agents in the agent-first era. The platform provides a suite of tools including Antigravity 2.0, CLI, SDK, and IDE to streamline agentic workflows.
Key Features of Antigravity
- Antigravity 2.0: Command center to manage multiple local agents in parallel, group conversations into Projects, and automate routine tasks with scheduled messages
- Antigravity CLI: Lightweight terminal-first interface for running autonomous coding agents, executing shell commands, and managing background subagents
- Antigravity SDK: Prototype custom agents with minimal code using Python scripts, automate software engineering tasks, and run evaluations on the agent harness
- Antigravity IDE: Full-featured agentic IDE with agent manager, artifacts, and deep codebase understanding
- Cross-Platform Support: Tools available for Linux, with additional platforms in development
- Use Case Templates: Pre-built templates for frontend, fullstack, science, and marketing workflows
- Enterprise Features: Designed for large-scale enterprise development with robust verification and artifact management
Tech / Self-Hosting
Google Antigravity is a cloud-based platform with local agent execution capabilities. The platform is designed for cloud-native development with optional local agent deployment. While primarily a SaaS offering, Google provides enterprise solutions with on-premises deployment options for organizations with strict data governance requirements.
- Cloud Platform: Fully managed Google Cloud service
- Local Agents: Can run on local machines with internet connectivity
- Enterprise Plans: On-premises deployment available for enterprise customers
- API Access: Comprehensive REST and SDK APIs for integration with existing development workflows