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ValidateHTML vs Steward

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

ValidateHTML compared with Steward
DetailValidateHTML logo ValidateHTMLSteward logo Steward
What it doesHTML validation API and free online validator for deployed pages A Mac app that turns GitHub pull-request notifications into a sorted inbox with AI-assisted code review
StageNot given Not given
FoundedNot given Not given
Based inFR Not given
Pricing modelFreemium Paid
PricingFree: 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 $10 one-time purchase at launch, then $20 for future customers. All future updates included. 14-day free trial available.
Key features
  • 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
  • Sorted inbox that separates pull requests into Needs my eyes and FYI categories
  • Morning report with daily briefing of pending reviews
  • Layered diff viewer with logical code organization
  • Code folding for TypeScript, JavaScript, and Ruby
  • Keyboard shortcuts for quick actions
  • Reviews ranked by importance and impact
  • Automatic morning report even when app is quit
What makes it different
  • 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
  • Layers diffs logically by code flow rather than alphabetically so you read them in writing order
  • Separates actionable notifications from informational ones so less noise reaches your inbox
  • Runs entirely on your Mac with no code sent to external servers
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)9 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)100
Citation Flow (Majestic)320
Referring domains (Majestic)1240

5 details filled in for both companies.

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