Compare AI Coding Tools

Comparing 3 tools side by side

Comparison	Google Antigravity Agentic development platform powered by Gemini for autonomous coding Contact-sales	Firebase Studio (formerly Project IDX)✓ Firebase Studio cloud IDE with Gemini-assisted development Free	Replit✓ AI-first cloud IDE with Replit Agent, Core/Teams credits, and one-click app hosting Freemium
Category	Cloud IDE	AI-Powered IDE	AI-Powered IDE
Pricing	Standard: Contact sales	Preview (no GDP): $0 Google Developer Program Standard: $0 (program enrollment) Google Developer Program Premium: Subscription (via GDP plan)	Starter: $0/month Core: $25 monthly or $20/month billed annually Teams: $40/month or $35/month billed annually per user Enterprise: Custom
AI Models	Gemini 3	Gemini in Firebase (configurable: 2.5 Pro/Flash, 3 Pro preview where available)	Replit proprietary models
Context Window	Large context; enterprise data via MCP	Long-context Gemini assistance; files and caching supported via Gemini API	Project-aware, long-context agent
Capabilities	Code Completion Code Generation Code Review Debugging Refactoring Testing Documentation Chat Agentic Mode Multi File	Code Completion Code Generation Code Review Debugging Refactoring Testing Documentation Chat Agentic Mode Multi File	Code Completion Code Generation Code Review Debugging Refactoring Testing Documentation Chat Agentic Mode Multi File
Platforms	macOSWindowsLinux	Web	WebDesktopMobile (iOS/Android apps)
Languages	All major languages	JavaScriptTypeScriptPythonDartJavaKotlin	PythonJavaScriptTypeScriptJavaC++Go+2 more
Open Source	No	No	No
GitHub Stars	N/A	N/A	N/A
Users	N/A	Preview users	40M+ builders (site claim)
Rating	N/A	N/A	N/A
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