Fast checks on every paid plan
Pro detects changes in 60 seconds, Business in 30, Enterprise in 10. Other tools start at 5 to 15 minutes.
Independent product comparisons
Best change detection software in 2026
A practical side-by-side comparison of leading website change detection tools. Honest features, current pricing, and a focused head-to-head page for every vendor we cover.
| Feature | OnChange | Visualping | Distill.io | Hexowatch | ChangeTower | changedetection.io | Wachete | Versionista |
|---|---|---|---|---|---|---|---|---|
| Free plan | ||||||||
| Cloud (no browser required) | ||||||||
| Sub-minute checks | ||||||||
| Visual (screenshot) diffs | ||||||||
| API / JSON monitoring | ||||||||
| AI change summaries | ||||||||
| Git commit attribution | ||||||||
| WCAG accessibility scans | ||||||||
| Slack / Discord alerts | ||||||||
| Custom webhooks | ||||||||
| REST API | ||||||||
| Self-serve pricing |
Yes, Partial, No. Based on publicly available information as of July 2026. Vendor features may have changed since publication.
Why teams switch to OnChange
Most change detection tools were built for one audience: marketers watching competitor pages. OnChange is built for the rest of the stack too. The product covers four monitor types deeply (text, visual, API, accessibility) and ties every detected change back to the code that caused it.
API monitoring is first-class
Dedicated JSON diff UI with JSONPath targeting. Track schema drift and breaking changes alongside page diffs.
AI change summaries on paid plans
Plain-English explanation of what changed and why it might matter, attached to alerts for meaningful changes on paid plans.
Causal attribution
Every detected change is matched against your repo's recent commits. Stop asking 'who deployed what'.
WCAG accessibility scans included
Full axe-core scans with attested baselines, ready for VPAT and agency client reports.
Honest, self-serve pricing
Free plan with full API access and all alert channels. Pro from $12/month. No annual contracts, no demo gating, no procurement.
Head-to-head comparisons
Each comparison page covers feature parity, pricing, and migration notes for that specific vendor. Pick the one that matches what you're evaluating.
OnChange vs Visualping
Polished consumer / marketing change monitor with strong visual diffs.
Pick OnChange if: You need sub-minute checks, API monitoring, or commit-aware attribution.
ReadOnChange vs Distill.io
Browser-extension-first monitor with cloud add-on.
Pick OnChange if: You want monitoring that runs even when your laptop is closed.
ReadOnChange vs Hexowatch
Broad suite of 13+ monitor types under one roof.
Pick OnChange if: You want depth over breadth on the four monitor types that matter most.
ReadOnChange vs ChangeTower
Marketing-leaning cloud page monitor with clean reporting.
Pick OnChange if: Your team also needs API monitoring, accessibility, and a REST API.
ReadOnChange vs changedetection.io
Popular open-source self-hosted change monitor.
Pick OnChange if: You'd rather not run servers, queues, and chrome pools yourself.
ReadOnChange vs Wachete
Long-running no-frills cloud monitor with email and SMS alerts.
Pick OnChange if: You want modern alerting, sub-minute checks, and a clean UI.
ReadOnChange vs Versionista
Enterprise web archival and change tracking with annual contracts.
Pick OnChange if: You want self-serve pricing, faster checks, and a developer REST API.
ReadOnChange vs PageCrawl
Feature-rich cloud monitor with protected-site crawling, discovery, AI reports, and WACZ.
Pick OnChange if: You need faster checks plus dedicated SEO, API, WCAG, and commit-attribution workflows.
ReadOnChange vs Fluxguard
AI-led web intelligence with gated workflows, network controls, proxies, and long-term archives.
Pick OnChange if: You want sub-minute operational monitoring and specialist diffs at self-serve prices.
ReadStill deciding? Read the buyer's guide
A practical, vendor-neutral framework for choosing a change detection tool: what to evaluate, the questions to ask in a trial, and the red flags to walk away from.
Make the comparison with your own page
No credit card. Five monitors, every alert channel, and full API access.