# Google Antigravity vs Kiro Published January 1, 2026 ยท Updated August 10, 2026 Google Antigravity and Kiro are both AI coding on a Mac, so the pick depends on workflow. Pick Antigravity for multi-agent Google workflows and visual browser verification. Pick Kiro for spec-first development with clear credit math and AWS. As of October 2026, both install with brew install --cask antigravity and brew install --cask kiro. August 2026: Antigravity and Kiro solve different jobs at similar competence. Antigravity's GA multi-agent console, listed Gemini 3.x plus Claude 4.6-class models, and built-in Chrome close the loop for product and front-end work. Kiro's credit ladder, EARS requirements, design and task artifacts, and Hooks automation close the loop for regulated and long-lived systems. Cursor remains the default third pick for solo product engineers who live in chat-and-diff rather than multi-agent dashboards or formal specs. Score them as peers on raw coding help. Score them differently on process: Antigravity optimizes parallel throughput; Kiro optimizes written intent before code; Cursor optimizes flow in one editor. macOS Tahoe 26.x and Apple Silicon are the assumed desktop baseline. Where weekly rate limits or monthly credits apply, treat them as soft capacity and size the plan before an agent-heavy week. ## Head to head | Factor | Google Antigravity | Kiro | | --- | --- | --- | | Price | Free | Free | | Open Source | No | No | | Replaces | Cursor Pro ($20/month) | Cursor Pro ($20/month) | | Best for | ai, ide, google | ai, ide, amazon | | Install | brew install --cask antigravity | brew install --cask kiro | | Category | Developer Tools | Developer Tools | ## Google Antigravity AI Coding Agent IDE by Google Install: `brew install --cask antigravity` [Google Antigravity on Bundl](https://bundl.run/apps/antigravity) ## Kiro Agent-centric IDE with spec-driven development by Amazon Install: `brew install --cask kiro` [Kiro on Bundl](https://bundl.run/apps/kiro) ## Features - **Agent Orchestration.** Antigravity wins on pure parallel agent capacity and visual management, offering a more mature multi-agent interface. Kiro's approach is more structured but less flexible for ad-hoc parallel work. - **Spec-Driven Development.** Kiro dominates spec-driven development by design. This is Antigravity's weakest area, it's built for speed, not formal engineering documentation. - **Model Support & Routing.** Tie, different menus, both strong; Antigravity for Gemini mix, Kiro for Claude premium via Bedrock-style routing. - **Built-in Browser/Testing.** Antigravity wins on front-end verification with its unique built-in Chrome. Kiro handles traditional testing automation better through Hooks. - **Workflow Automation.** Kiro's Hooks system is a major differentiator for workflow automation. Antigravity lacks comparable event-driven capabilities. - **VS Code Compatibility.** Antigravity has superior VS Code compatibility as a direct fork with full Marketplace access. Kiro is close but has some extension limitations. - **Ecosystem Integration.** Kiro wins for AWS users with thorough enterprise integrations. Antigravity is more vendor-neutral outside of Google's ecosystem. - **Pricing Transparency.** Kiro wins pricing transparency. ## FAQ ### Is Antigravity or Kiro cheaper at $20/month? List prices rhyme (Google AI Pro โ‰ˆ $20; Kiro Pro = $20), but metering differs: Antigravity uses Google weekly/credit pools, Kiro uses explicit monthly credits with $0.04 overages. Compare your agent-trace volume, not the sticker alone. ### Which is better for front-end development: Antigravity or Kiro? Antigravity has a clear advantage for front-end work due to its unique built-in Chrome browser. This allows agents to visually verify UI changes, fill forms, click buttons, and capture screenshots, creating a tight feedback loop between code generation and visual validation. Kiro lacks this visual verification capability, focusing instead on automated testing through its Hooks system. ### Is Kiro only for AWS users? While Kiro has deep AWS integrations (CodeCatalyst, Bedrock, IAM), it doesn't require an AWS account to use. Developers can sign in with GitHub or Google and use Kiro independently. However, the full value of Kiro, including enterprise features like SAML/SCIM SSO, is realized within AWS-centric organizations. Non-AWS users may find some integrations less relevant. ### Why does Antigravity have pricing controversies? Antigravity uses an opaque credit system where the credit-to-token conversion rate is not publicly disclosed. Users have reported multi-day lockouts (7-10 days) when exhausting quotas, even on paid tiers like Pro and Ultra. A single Claude Opus session can consume 600+ credits, making costs unpredictable. Google has also reduced free tier quotas multiple times since launch, creating trust issues. ### Can I use Claude models in both tools? Yes, both Antigravity and Kiro support Claude models. Antigravity supports Claude Sonnet 4.6 and Opus 4.6 alongside Gemini and GPT. Kiro routes between Claude Sonnet for reasoning-heavy specs and Amazon Nova for high-throughput generation. However, Antigravity's first-party features are optimized for Gemini, while Kiro provides more neutral multi-model routing through Amazon Bedrock. ### What is spec-driven development and why does it matter? Spec-driven development is Kiro's core methodology where structured specifications (requirements in EARS notation, architectural designs, task breakdowns) are created before any code is written. This makes specs the primary artifact and code a build output. It matters because it ensures documentation quality, decision traceability, and long-term maintainability, addressing the 'vibe coding' problem where AI-generated code lacks context and documentation. ### How many parallel agents can each tool run? Antigravity's Manager View supports up to 5 parallel agents working simultaneously across different workspaces. Kiro supports parallel execution but with less emphasis on visual orchestration, its workflow is more focused on sequential spec-to-code pipelines. If you routinely need more than 5 parallel sessions, neither tool may suffice, and you might need complementary tools like Nimbalyst. ### Is either tool open source? Neither tool is fully open source. Antigravity is a closed-source VS Code fork distributed as a binary. Kiro is based on Code OSS (the open-source foundation of VS Code) but adds proprietary AWS-specific features. Both allow some community contributions through feedback and extensions, but core development is controlled by Google and AWS respectively. ### What happened to Amazon Q Developer? Amazon Q Developer was announced for end-of-support in April 2026, with AWS recommending Kiro as the successor for developers seeking AI-assisted coding. Q Developer proved that AI belongs in the developer workflow, and Kiro builds on that foundation with more sophisticated spec-driven development capabilities and deeper AWS integrations. ### Which tool has better VS Code compatibility? Antigravity has superior VS Code compatibility as a direct fork with full access to the VS Code Marketplace. Kiro is based on Code OSS and supports Open VSX compatible plugins, which covers most popular extensions but not the complete VS Code ecosystem. Both support importing VS Code settings and keybindings. ### Antigravity or Kiro: which should I install first? Install the one that matches how you already work. If you ship prototypes by spinning agents and reviewing diffs, start Antigravity on the free Individual tier and watch weekly limits. If you already write tickets or RFCs before code, start Kiro Free (50 credits) and force one small feature through requirements, design, and tasks. Switching later is possible; learning both deeply in the same week is rarely worth it. ### Antigravity vs Kiro vs Cursor: who wins? Cursor wins polished single-dev AI editing and autocomplete. Antigravity wins parallel agents plus built-in Chrome verification under Google models. Kiro wins when specs, Hooks, and AWS IAM matter more than vibe coding. Teams often keep Cursor or Antigravity for UI spikes and Kiro for services that need an audit trail. There is no universal winner across all three axes. ### What are the dealbreakers for Antigravity? Opaque quota math and lockout risk when weekly or credit pools burn down mid-mission; weak native EARS-style specs; first-party bias toward Gemini even though Claude and open weights appear on the menu. If you need formal requirements as the source of truth every sprint, Antigravity will feel incomplete. ### What are the dealbreakers for Kiro? Spec ceremony slows greenfield spikes; AWS gravity makes non-AWS shops pay for integrations they barely use; no built-in browser for visual UI verification; Free credits are easy to exhaust. If you only want chat-to-diff speed, Kiro's process will feel heavy. ### How long does migration between Antigravity and Kiro take? Plan a weekend for a single active repo if you export prompts, recreate one feature as a Kiro spec (or flatten Kiro specs into Antigravity agent briefs), and re-map extensions. Multi-repo teams should budget a sprint: Hooks and Manager View habits do not translate one-to-one. Keep the old tool installed for two weeks so mid-incident work does not stall. ### Is Antigravity free in 2026? Yes for individuals: Antigravity lists Individual at $0/month with basic weekly rate limits, unlimited tab completions and command requests, and access to the published model menu (Gemini 3.x, Claude Sonnet and Opus 4.6, gpt-oss-120b). Google AI Pro and Ultra raise rate limits and credit pools. Organization access runs through Google Cloud consumption. Free does not mean unlimited agent burn. ## Sources - [Antigravity pricing](https://antigravity.google/pricing) - [Antigravity home](https://antigravity.google/) - [Kiro pricing](https://kiro.dev/pricing) - [Kiro home](https://kiro.dev/) - [AWS re:Post on Kiro IDE platform support](https://repost.aws/articles/AReLJ1UhxdTzqXP-h421MFCg/use-kiro-ide-and-agent-toolkit-for-aws-to-build-deploy-and-manage-your-aws-environment) - [Cognition blog on Windsurf (competitive context)](https://cognition.ai/blog/windsurf) - [Kiro vs Antigravity (2026) , Augment Code](https://www.augmentcode.com/tools/kiro-vs-antigravity) ## Related - [Cursor vs Google Antigravity](https://bundl.run/compare/cursor-vs-antigravity) - [Google Antigravity vs Windsurf](https://bundl.run/compare/antigravity-vs-windsurf) - [Google Antigravity vs Claude](https://bundl.run/compare/antigravity-vs-claude) - [Cursor vs Kiro](https://bundl.run/compare/cursor-vs-kiro) - [Kiro vs Trae](https://bundl.run/compare/kiro-vs-trae) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://bundl.run/#organization", "name": "Bundl.run", "url": "https://bundl.run", "logo": { "@type": "ImageObject", "url": "https://bundl.run/og-image.png", "width": 1200, "height": 630 }, "description": "The Ninite for Mac. 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It matters because it ensures documentation quality, decision traceability, and long-term maintainability, addressing the 'vibe coding' problem where AI-generated code lacks context and documentation." } }, { "@type": "Question", "name": "How many parallel agents can each tool run?", "acceptedAnswer": { "@type": "Answer", "text": "Antigravity's Manager View supports up to 5 parallel agents working simultaneously across different workspaces. Kiro supports parallel execution but with less emphasis on visual orchestration, its workflow is more focused on sequential spec-to-code pipelines. If you routinely need more than 5 parallel sessions, neither tool may suffice, and you might need complementary tools like Nimbalyst." } }, { "@type": "Question", "name": "Is either tool open source?", "acceptedAnswer": { "@type": "Answer", "text": "Neither tool is fully open source. Antigravity is a closed-source VS Code fork distributed as a binary. 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Kiro is based on Code OSS and supports Open VSX compatible plugins, which covers most popular extensions but not the complete VS Code ecosystem. Both support importing VS Code settings and keybindings." } }, { "@type": "Question", "name": "Antigravity or Kiro: which should I install first?", "acceptedAnswer": { "@type": "Answer", "text": "Install the one that matches how you already work. If you ship prototypes by spinning agents and reviewing diffs, start Antigravity on the free Individual tier and watch weekly limits. If you already write tickets or RFCs before code, start Kiro Free (50 credits) and force one small feature through requirements, design, and tasks. Switching later is possible; learning both deeply in the same week is rarely worth it." } }, { "@type": "Question", "name": "Antigravity vs Kiro vs Cursor: who wins?", "acceptedAnswer": { "@type": "Answer", "text": "Cursor wins polished single-dev AI editing and autocomplete. Antigravity wins parallel agents plus built-in Chrome verification under Google models. Kiro wins when specs, Hooks, and AWS IAM matter more than vibe coding. Teams often keep Cursor or Antigravity for UI spikes and Kiro for services that need an audit trail. There is no universal winner across all three axes." } }, { "@type": "Question", "name": "What are the dealbreakers for Antigravity?", "acceptedAnswer": { "@type": "Answer", "text": "Opaque quota math and lockout risk when weekly or credit pools burn down mid-mission; weak native EARS-style specs; first-party bias toward Gemini even though Claude and open weights appear on the menu. If you need formal requirements as the source of truth every sprint, Antigravity will feel incomplete." } }, { "@type": "Question", "name": "What are the dealbreakers for Kiro?", "acceptedAnswer": { "@type": "Answer", "text": "Spec ceremony slows greenfield spikes; AWS gravity makes non-AWS shops pay for integrations they barely use; no built-in browser for visual UI verification; Free credits are easy to exhaust. If you only want chat-to-diff speed, Kiro's process will feel heavy." } }, { "@type": "Question", "name": "How long does migration between Antigravity and Kiro take?", "acceptedAnswer": { "@type": "Answer", "text": "Plan a weekend for a single active repo if you export prompts, recreate one feature as a Kiro spec (or flatten Kiro specs into Antigravity agent briefs), and re-map extensions. Multi-repo teams should budget a sprint: Hooks and Manager View habits do not translate one-to-one. Keep the old tool installed for two weeks so mid-incident work does not stall." } }, { "@type": "Question", "name": "Is Antigravity free in 2026?", "acceptedAnswer": { "@type": "Answer", "text": "Yes for individuals: Antigravity lists Individual at $0/month with basic weekly rate limits, unlimited tab completions and command requests, and access to the published model menu (Gemini 3.x, Claude Sonnet and Opus 4.6, gpt-oss-120b). Google AI Pro and Ultra raise rate limits and credit pools. Organization access runs through Google Cloud consumption. Free does not mean unlimited agent burn." } } ], "isPartOf": { "@id": "https://bundl.run/compare/antigravity-vs-kiro" } } ] } ```