Google Antigravity vs Kiro (2026)
Updated March 9, 2026
vs
Overview
Rating
10.0 / 10
Rating
10.0 / 10
Best For
Developers who want AI agents working across their editor, terminal, and browser
Best For
Developers who want an AI agent to plan features as specs before writing code
Product Summary
Google Antigravity is Google's agentic development platform, with an agent-first IDE, a terminal CLI, and Antigravity 2.0 for running multiple coding agents in parallel.
Product Summary
Kiro is AWS's agentic coding tool, with an IDE, CLI, and web app that turn prompts into specs, designs, and task lists before writing the code.
Starting Price
Free
Starting Price
$0
Free Trial
Yes
Free Trial
No
Free Version
Yes
Free Version
Yes
Website
Website
Key features
Core capabilities each platform advertises.
- Agent-first IDE with an agent manager and codebase-aware context
- Antigravity 2.0 for running multiple local agents in parallel
- Terminal CLI with background subagents
- Python SDK for prototyping custom agents
- Spec-driven development: requirements, design, and task lists before code
- Hooks that run tasks like tests and doc updates in the background
- Steering files shared across IDE, CLI, and web
- Models from Anthropic, OpenAI, and open-weight providers, plus Auto mode
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Free individual plan with unlimited Tab completions and Command requests
- Works across an IDE, a terminal CLI, and a standalone agent manager
- Gemini models on every plan, with Claude Sonnet 5.5 and Opus 5.5 on paid plans
- Business plans include spend caps and centralized admin controls
Cons
- Rate limits are described by tier rather than published as specific numbers
- Claude models require Google AI Pro (non-trial) or higher
- Pro and Ultra are Google One bundles, so you pay for storage and other services too
- Model choice is limited to the models Google lists for each plan
Pros
- Free plan with 50 credits a month
- Spec-driven workflow produces requirements and designs, not just code
- Choice of Claude, GPT, and open-weight models, with Auto mode
- Available as an IDE, CLI, web app, and mobile app
Cons
- Credit multipliers vary by model, so cost per task can be hard to predict
- Unused monthly credits don't roll over
- Free plan is limited to open-weight models and Claude Sonnet 4.5 with rate limits
- Enterprise sign-in runs through AWS IAM Identity Center
Google Antigravity or Kiro — which should you choose?
Choose Google Antigravity if you wantChoose if you want
- Running several coding agents in parallel on one codebase
- Handing terminal tasks to background subagents
- Automating repetitive frontend and UX work in the browser
- Prototyping custom agents in Python
Choose Kiro if you wantChoose if you want
- Planning a new feature as a spec before any code is written
- Running background checks like unit tests on every change
- Working across an IDE, terminal, and browser with shared project rules
- Rolling out an AI coding tool to teams already on AWS
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