Google Antigravity IDE vs Replit

Google Antigravity IDE is an agentic development environment where software agents plan and execute tasks across an editor, terminal, and browser. Agent and Tab features include real-time code completion and helper suggestions, while asynchronous local agents can work in parallel across workspaces and codebases. Their deliverables can include Markdown plans, code diffs, architecture diagrams, images, and browser recordings; the browser agent can read dashboards, perform source-control actions, and test interfaces. Projects can use Git worktrees, scoped permissions and settings, and multiple folders. Agents are limited to project folders and request permission for terminal commands outside the sandbox on macOS and Linux, or for any terminal command on Windows. The standalone IDE supports macOS 12 or later, Windows 10 64-bit, and Linux meeting specified library minimums. Individuals have a free plan at free, with baseline Gemini access, unlimited Tab completions and Command requests, and basic weekly rate limits. Limits depend on plan and workload; enterprise customers are not supported for this IDE.

Replit is a software creation platform where users can describe applications in natural language and refine them with an AI agent. The agent works through chat, tests and revises code, and can use a browser to produce reports and address issues. Its cloud development environment supports coding and collaboration in a browser, with automatic package installation and built-in authentication, database, hosting, and monitoring. Replit supports websites, mobile projects, designs, slides, animations, data visualizations, 3D, games, documents, and spreadsheets, with more than 100 integrations. The free Starter plan includes daily usage, but limits publishing to one live project and running one background task at a time. Replit Core costs $18 per month billed annually, and Pro costs $90 per month billed annually. Pro supports up to 15 collaborators and 50 viewers, and includes database rollback for up to 28 days. Replit is available on Android, iOS, Linux, macOS, Windows, and web. Its mobile apps support building, sharing, and publishing web apps; native iOS development uses the web version with Expo Go previews.