Google Antigravity IDE vs Kiro

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.

Kiro is an agentic development environment for professional developers, software teams, businesses, and enterprises. Its spec-driven workflow turns prompts into requirements, designs, and tasks for agents to implement. Deterministic tools, including property-based tests, verify code correctness and its alignment with user intent. Background agent hooks can update documentation, generate unit tests, or optimise performance, while steering files let users supply project or global context, standards, and workflows. The IDE supports VS Code settings, themes, Open VSX plugins, and MCP servers for connecting agents to external services, APIs, documentation, and tools. Desktop versions run on macOS, Windows, and Linux; Kiro also has a web interface and mobile app for accessing cloud sessions from a phone. Kiro Web requires a paid subscription. The free plan includes 50 credits per month; KIRO PRO costs $20 a month billed per user and includes 1,000 credits. Kiro says it encrypts data in transit and at rest; enterprise administrators can configure customer-managed keys.