Turnstone vs Google Antigravity

SpecialistProvides superior reasoning and artifact generation for coding tasks, but lacks a dedicated native desktop development command center.

Offers a more mature polished AI-native coding experience, but lacks Google's specific native multi-agent command center ecosystem.

A general-purpose AI agent that executes tasks, not just answers them

Enables rapid full-stack app building and deployment entirely in the cloud, but offers less granular local agentic control.

Deeply reads entire codebases to execute complex multi-file tasks, though integrated as an IDE plugin rather than standalone suite.

Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.

Delivers robust spec-driven engineering and autonomous verification workflows, though configured differently than Google's developer platform.

Cognition's autonomous software engineer that ships real pull requests

The coding agent that learns your coding taste

Chat with 30+ leading AI models in one clean, fast workspace

Free / Open-sourceOpen-source development environment running multiple CLI coding agents in isolated git worktrees, but requires manual setup.

GenAI-native end-to-end QA agent that plans, writes and heals tests in plain language