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Google Antigravity vs Kiro

A feature-by-feature comparison of Google Antigravity and Kiro across 7 capability categories.

First tool

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Second tool

Try Kiro (opens in a new tab)

Modalities — Tie

Modalities: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Text Input	Yes, requires free plan. Agents are driven by text prompts in the desktop command center, IDE agent panel, and CLI.	Yes, requires free plan. Prompts become specs (requirements, design, tasks) then implementation.
Image Upload / Vision	Unknown. Vision attach in the agent panel was not confirmed on the product homepage or plans doc.	Partial. Homepage mentions multimodal inputs and Figma as context. A general image-upload vision API was not separately documented.
Image Generation	No. Documented as an agentic coding platform, not an image generator.	No. A coding agent, not an image model.
Voice Mode	No. No conversational voice loop is documented.	No. No conversational voice loop is documented.
Video Understanding	No. Not a video-analysis product.	No. Not a video-analysis product.
Video Generation	No. Not a video generation product.	No. Not a video generation product.
File Upload (PDF, DOCX)	Yes, requires free plan. Agents operate on the local workspace/codebase. That is repo context, not a PDF chat uploader.	Yes, requires free plan. Works on local workspaces and, on the web, GitHub/GitLab repos in cloud sandboxes.
Code Execution	Yes, requires free plan. The CLI runs shell commands and coding agents. The IDE agent edits and verifies in the project.	Yes, requires free plan. Agents implement, test, and can run headless in CI. Web sessions run in isolated sandboxes.
Audio Input	No. No audio-file input is documented.	No. No audio-file input is documented.
Canvas / Artifact Editor	Unknown. Overlapping columns disagreed (partial vs yes); left unverified rather than copying a no.	Unknown. Overlapping columns disagreed (partial vs yes); left unverified rather than copying a no.
Screen Sharing / Computer Use	Partial. Browser-in-the-loop agents automate in-page tasks. That is computer-use-like, not a screen-share meeting product.	No. No computer-use desktop takeover is documented. Agents edit the workspace.

Memory & Context — Kiro Wins

Memory & Context: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Persistent Memory	Partial. Custom agents and ~/.gemini/ plus .agents/ configs persist. That is project/user config, not ChatGPT-style memory of you.	Yes, requires free plan. Steering files (.kiro/steering/, ~/.kiro/steering/, AGENTS.md) persist conventions across sessions and surfaces.
Large Context Window	Unknown. Uses Gemini agent models; no token window is published on the Antigravity plans page.	Unknown. Uses multiple FMs via Bedrock/Auto. No token window is published on the pricing page.
Custom Instructions	Yes, requires free plan. Custom Agents are Markdown+YAML under .agents/agents/ or ~/.gemini/config/agents/.	Yes, requires free plan. Steering markdown (always / fileMatch / manual) plus AGENTS.md.
Conversation History	Yes, requires free plan. Antigravity 2.0 groups conversations into Projects and can schedule messages.	Yes, requires free plan. IDE, CLI, web, and Crew keep sessions. Web sandboxes keep running after you close the laptop.

Integrations — Google Antigravity Wins

Integrations: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Web Search / Browsing	Partial. Frontend pitch is browser-in-the-loop agents. That is agent browsing, not a cited search box.	Unknown. MCP can pull tools; a first-party live-web search toggle was not confirmed.
Plugins / Extensions	Yes, requires free plan. Codelab: Antigravity IDE supports local and remote MCP servers; a blog covers IDE Extensions.	Yes, requires free plan. MCP, Agent Client Protocol, Open VSX extensions, Skills.md, and 500+ CLI tools.
API Access	Yes, requires free plan. Antigravity SDK is a documented Python surface for custom agents on the harness.	Partial. Headless CLI in CI/CD and ACP into other IDEs. That is not a public REST generate API.
Zapier Integration	Unknown. No first-party Zapier app was checked.	Unknown. No first-party Zapier app was checked.
Custom GPTs / Bots	Yes, requires free plan. Custom Agents (Markdown) can be selected in the GUI or run via agy --agent.	Yes, requires free plan. Custom agents plus steering; ACP into other tools. Kiro Crew is the open-source coordinator.
Real-time Collaboration	Unknown. Repo-shared .agents/ files help teams. Live multiplayer editing was not documented.	Partial. Team billing and shared steering. Live multiplayer cursors were not documented.
Live Social Data Integration	No. Not a live social-firehose product.	No. Not a live social-firehose product.
Live Citation Mapping	No. Not a cited-search product.	No. Not a cited-search product.

Developer — Google Antigravity Wins

Developer: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Function Calling	Yes, requires free plan. Agents use tools, MCP, shell, and subagents rather than a chat-only reply.	Yes, requires free plan. Agents take actions (implement, test, hooks, MCP tools), not chat-only replies.
Streaming Responses	Unknown. Token streaming in the agent UI is not documented as an API guarantee.	Unknown. Token streaming is not documented as an API contract.
Fine-Tuning	No. You pick Gemini (and on Ultra, third-party) models. No custom-weight training product.	No. You pick models (Auto, Claude, GPT, open-weight). No custom-weight training product.
Embeddings API	No. Not an embeddings API.	No. Not an embeddings API.
Structured Output (JSON)	Unknown. Artifacts exist in the IDE; JSON-schema guarantees were not documented.	Partial. Specs and property-based tests are structured artifacts. Not a JSON-schema chat API.
Reasoning / Thinking Mode	Yes, requires free plan. Core agent models include Gemini 3.1 Pro / 3.5 Flash. Ultra adds third-party models.	Unknown. Overlapping columns disagreed (yes vs partial); left unverified rather than copying a no.
Local Execution	Yes, requires free plan. Agents run locally on the machine; models remain Google-hosted Gemini (and partners).	Yes, requires free plan. IDE and Crew run on your machine; web sandboxes are cloud. Models are hosted.
Open Weights	No. The harness is Google’s. Open-weight models are not the documented default.	Partial. You can select open-weight models (Qwen, DeepSeek, MiniMax, GLM). The Kiro product itself is not an open-weight release except Crew.
Multi-Agent Orchestration	Yes, requires free plan. Command center runs multiple local agents in parallel; CLI manages background subagents.	Yes, requires free plan. Parallel agents implement tasks; hooks fire on IDE events; Crew coordinates tools.

Platforms — Kiro Wins

Platforms: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Web App	No. Surfaces are desktop, IDE, and CLI. A browser IDE is not the documented product.	Yes, requires plus plan. Kiro on the web (preview) is for paid Pro+ tiers; sandboxes keep running in the cloud.
iOS App	No. Downloads are macOS, Windows, and Linux.	Yes, requires plus plan. Homepage: sign in on mobile with a paid account. Store listing OS split was not opened this round; Google/Apple both implied by “mobile app”.
Android App	No. No Android client is documented.	Unknown. A mobile app is documented; Android vs iOS split was not confirmed on a store page.
Desktop App	Yes, requires free plan. Antigravity 2.0 is a standalone desktop command center; Antigravity IDE is a separate desktop install.	Yes, requires free plan. Downloadable IDE for the OS; Open VSX + VS Code settings import.
Chrome Extension	No. No official Chrome extension is documented.	No. Not distributed as a Chrome extension.

Privacy — Tie

Privacy: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
GDPR Compliant	Unknown. Needs a current Google DPA read for Antigravity specifically.	Unknown. Needs an AWS DPA read for Kiro specifically.
Opt Out of Data Training	Unknown. Training opt-out was not on the plans page checked.	Unknown. Enterprise privacy is advertised; a consumer training opt-out toggle was not checked.
Enterprise Privacy Mode	Yes, requires enterprise plan. Teams use Google Cloud terms via Gemini Enterprise Agent Platform. Individual BYOK is explicitly unsupported.	Yes, requires enterprise plan. IAM, SSO, usage dashboards, IP indemnity, GovCloud, centralized billing.

Workspaces — Tie

Workspaces: Google Antigravity compared with Kiro
Feature	Google Antigravity	Kiro
Projects / Folders	Yes, requires free plan. Antigravity 2.0 groups conversations into Projects and works across workspaces.	Yes, requires free plan. Workspace .kiro/specs and steering; Crew is a persistent local workspace.