Compare
OnChange vs Hexowatch
Hexowatch is a broad monitoring suite that bundles many detection types (visual, HTML, technology, keyword, sitemap, domain expiry, SSL, etc.). OnChange goes deep on the four types most teams actually need: text, visual, API, and WCAG.
Hexowatch's pitch is breadth - one tool for a dozen monitor types. OnChange's pitch is depth: faster checks, developer-first tooling, AI summaries and causal attribution on every change, and WCAG scans agencies can hand to clients. If your use case is one of the specialty Hexowatch monitor types (domain or SSL expiry for instance), that tool is purpose-built for it. If you're monitoring web pages and APIs, OnChange is the leaner fit.
| Feature | OnChange | Hexowatch |
|---|---|---|
Free plan available Both offer free tiers with limited checks. | ||
Sub-minute check intervals Hexowatch typically starts at 5-minute minimums on paid plans. | ||
Visual (screenshot) diffs | ||
Text / content diff detection | ||
API / JSON endpoint monitoring Both support API monitoring; OnChange's JSON diff UI is built for developers. | ||
CSS selector targeting | ||
AI change summaries on every alert OnChange uses Claude on every change; Hexowatch offers AI on select monitor types. | ||
Causal attribution (Git commit correlation) Unique to OnChange - matches every change to your repo's recent commits. | ||
WCAG accessibility scans Full axe-core scans with attested baselines for VPAT workflows. | ||
Slack / Discord alerts | ||
Custom webhooks | ||
REST API | ||
Team collaboration | ||
Domain / tech stack / SSL monitoring Hexowatch bundles domain expiry, tech stack, and SSL monitors; OnChange focuses on page and API changes. |
Comparison based on publicly available information. Hexowatch's feature set may have changed since publication; please verify on their website.
Pick OnChange if…
- You want fast sub-minute checks, not the 5-15 minute minimums most tools impose
- Your team writes code and you want deploy-aware "why did this change" verdicts
- You're an agency doing WCAG work and need attested accessibility baselines
- You prefer a focused tool with depth over a broad checklist of monitor types
- You want AI change summaries on every single change, not just specific types
- You need a clean REST API to script monitor lifecycle from CI
Pick Hexowatch if…
- You want domain expiry, SSL expiry, and tech-stack monitoring bundled into one tool
- You already use Hexowatch's agency / whitelabel workflow and don't want to split tools
- Your use cases span many niche monitor types (Sitemap, RSS, Keyword rank, etc.)
- You don't need sub-minute frequency or Git-aware attribution
Pricing
Hexowatch's paid tiers scale from roughly $14/month to enterprise pricing and are structured around total monitor count across every monitor type. OnChange Free is $0 with 5 full-feature monitors; Pro is $12/month for 50 monitors at 60-second intervals; Business is $39/month for 300 monitors at 30-second intervals.
Migrating from Hexowatch
For Hexowatch's visual / HTML monitors, the CSS selectors and URL configuration transfer directly. Notification destinations (Slack / Discord / webhooks) map 1:1. If you use Hexowatch's specialty monitors (domain expiry, SSL, etc.) OnChange doesn't have a direct equivalent today - keep those on Hexowatch or use a dedicated SSL / domain tool.
Try OnChange free
5 monitors, every feature included, no credit card required. CancelHexowatchwhenever you're ready.
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