mabl is the most advanced agentic testing platform on the market. In April 2026, mabl launched 'Active Coverage' — a system where AI agents build tests, run tests, and fix tests automatically, keeping pace with AI-generated code changes. That is a genuinely valuable capability. Glia Quest measures something different.
What each tool measures
mabl's 'Active Coverage' answers: 'Is my test suite keeping up with my code?' Glia Quest's 'Navigation Coverage' answers: 'Can my users actually find the features I shipped?' These are orthogonal questions. A team can have 100% Active Coverage and 60% Navigation Coverage. The tests all pass. The features all work. But four out of ten features are invisible to users because no navigation path leads to them.
mabl's Active Coverage measures whether your test suite keeps pace with code changes. Glia Quest's Navigation Coverage Score measures the gap between what your sitemap declares and what your users can reach through navigation. mabl's denominator is your test suite. Glia Quest's denominator is your sitemap. Both are objective, verifiable anchors — but they measure fundamentally different things.
Pricing
mabl pricing starts at approximately $450–500/month for the Starter tier. Growth and Enterprise pricing is custom. Glia Quest starts at $9.99 pay-as-you-go with no subscription required. Competitor pricing verified April 2026.
Who should use which
Neither replaces the other. If your priority is keeping test suites in sync with rapid AI-assisted development, mabl is purpose-built for that.
If your priority is understanding what percentage of your application your users can actually reach — and whether the pages they reach are correct — Glia Quest measures that and mabl does not.
How Glia Quest compares
Glia Quest uses your sitemap as ground truth to measure the gap between what your application declares and what your users can actually reach. It also produces a Quality Rating (A–F) on every scan, checking each reachable page for missing titles, exposed credentials, broken navigation components, and cross-locale rendering issues. No additional cost.
- Navigation Coverage Score
- Glia Quest yes · mabl no
- Quality Rating (A–F)
- Glia Quest yes · mabl no
- Sitemap-anchored scoring
- Glia Quest yes · mabl no
- Locale coverage
- Glia Quest yes · mabl no
- Test script generation
- Glia Quest no · mabl yes (AI-generated Playwright)
- Test self-maintenance
- Glia Quest no · mabl yes (Active Coverage)
- Entry price
- Glia Quest $9.99 PAYG · mabl ~$500/month