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Hronaut vs ValidateHTML

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Hronaut compared with ValidateHTML
DetailHronaut logo HronautValidateHTML logo ValidateHTML
What it doesA separate, visible browser for every project your coding agent touches HTML validation API and free online validator for deployed pages
StageStartup Not given
FoundedNot given Not given
Based inNot given FR
Pricing modelFree trial Freemium
Pricing10-day free trial (no credit card required), then $4/month or $24/year per named user. Annual plan is 50% off the $48 cost of twelve monthly payments. Free: unlimited validators and checkers, no account required, free site scans. Solo: 49 EUR per month including full site reports and monitoring of 1 site. Agency: 149 EUR per month including monitoring of 10 sites. Automatic fixes: from 3 EUR for 10 pages, 1 free fix daily without account. Full sit
Key features
  • Isolated workspace per project with separate cookies and sign-ins
  • Watch, pause, and take over agent actions at any time
  • Test local applications and localhost environments
  • Support for signed-in applications and session handoff
  • Parallel agent execution with isolated workspaces
  • Resume after agent disconnection with workspace persistence
  • Local Web3 wallet interaction and approval
  • Side-by-side split view for comparing pages
  • Cross-platform support: Windows, macOS, Linux
  • Up to three active devices per subscription
  • Accessibility (WCAG) validation with machine-detectable failures
  • HTML specification compliance checking
  • Meta tags and viewport validation
  • Open Graph checker
  • Page weight measurement and compression analysis
  • Single API endpoint with configurable checks
  • Single verdict field for build pipeline integration
  • Automatic AI-powered HTML fixes
  • Weekly site audits with change notifications
  • GitHub Actions integration
What makes it different
  • Your personal Chrome stays completely private and separate from agent operations
  • Local-first design with profiles stored on your computer
  • Verifiable releases with SHA-256 hashes and GitHub build attestations
  • Source-available under a subscription license
  • No credit card required for 10-day trial
  • One API call runs five checks on a single page fetch instead of five separate requests
  • Single boolean verdict for build pipelines to act on without parsing prose
  • False-positive filtering eliminates unreliable findings
  • Quality score based on issue variety, not count, capping best-practice impact
  • Free tools remain unlimited without account or daily limits
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)12 −1 (down) since last check9 no change since last check
Trust Flow (Majestic)210
Citation Flow (Majestic)3032
Referring domains (Majestic)30124

5 details filled in for both companies.

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