Verdict
Choose GTmetrix when
- Agent readiness level matters to you. A current MCP server and REST API make testing agent-callable, but the product does not execute site fixes or retain business context.
- Value accessibility matters to you. Free entry point and relatively low-cost paid tiers provide accessible performance testing.
- Free tools matters to you. Provides meaningful free page testing, with paid limits for scale.
Verdict
Choose Moz Pro when
- Keyword research quality for SEO content matters to you. Strong keyword discovery, intent, SERP, competitive, and prioritization data for content planning.
- AI-search / GEO matters to you. Dedicated AI Visibility dashboards track prompts across GPT, Gemini, Google AI Mode, and Perplexity.
- GEO readiness matters to you. Prompt suggestions, AI visibility, AI Overviews, and AI Content Briefs support GEO research and content planning.
- Research depth matters to you. Strong breadth of SEO research workflows across keywords, competitors, SERPs, domains, and brand authority.
Read the full reviews: GTmetrix and Moz Pro.