Compare 8 min read

# Google Antigravity vs Mneme

Agentic IDEs vs architectural governance

Antigravity is an agent execution and orchestration environment. Mneme is an architectural governance layer for those environments. Different jobs at different layers of the AI engineering stack — and they compose.

By Theo Valmis·May 2026

Google Antigravity helps teams delegate more software work to agents. Mneme helps teams prevent those agents from silently violating architecture decisions while they work.

## The layer distinction

Dimension | Google Antigravity | Mneme
--- | --- | ---
Primary job | Agent-first development environment | Architectural governance layer
User mode | Manage autonomous agents | Define and enforce architectural constraints
Main surface | Editor, terminal, browser, Agent Manager | Repo, ADRs, CLI, hooks, CI
Output | Code, plans, browser actions, Artifacts | Governance packets, checks, violations, decision provenance
Risk addressed | Developer productivity and task execution | Architectural drift and invariant violations
Review model | Human reviews Artifacts and agent output | Machine-checkable governance before and after generation
Best together | Agents execute work | Mneme constrains agent behavior

## How they compose

The point of the comparison is not to choose one or the other. The point is to use both at the right layer.

- Antigravity runs the agent across editor, terminal, and browser. It produces plans, executes tool calls, exercises browsers, and surfaces Artifacts for human review.
- Mneme sits one layer up. It injects the architectural decisions relevant to the task before the agent generates, and validates outputs against compiled constraints at hook, commit, and CI time.
- The reviewer sees both the agent’s Artifacts (what it did) and the structured governance verdict (whether the work belongs in the system). Review focuses on judgment.

## SEO sibling pages

For teams comparing agent-first IDEs and governance layers more broadly:

- Mneme vs Cursor Rules — the IDE-rules-system contrast
- Mneme vs Claude Code Memory — the memory-vs-governance contrast
- Devin vs Architectural Governance — the autonomous-coding-agent contrast
- RAG vs Governance — the retrieval-vs-enforcement contrast