Sitechecker vs WebPageTest in 2026: Client-reporting SEO platform vs free diagnostic depth
One is an $89-a-month cloud dashboard built for recurring agency client work. The other is a free, open-source diagnostic tool that engineers at Google and Mozilla still use to figure out why a page is actually slow.
Sitechecker
WebPageTest- WebPageTest is free to use with no account required; Sitechecker has no free tier at all and starts at $89 a month.
- Sitechecker bundles a crawler, rank tracker, AI Visibility Tracker, and white-label reports built for recurring client accounts. WebPageTest has none of that; it is a diagnostic tool for one-off or scripted performance tests.
- WebPageTest exposes full waterfall, filmstrip, and raw HAR data from real browser tests at 30-plus global locations, a level of diagnostic depth Sitechecker does not attempt to match.
- Sitechecker's AI Visibility Tracker monitors how a site is cited in ChatGPT and Perplexity responses, a feature WebPageTest has no equivalent for.
- WebPageTest's Pro API starts at $9.89 a month and adds continuous monitoring and priority queueing. Sitechecker's API is locked to the Enterprise tier with custom pricing.
- Sitechecker is a dashboard you check weekly for client accounts. WebPageTest is a test you run when you need to know exactly what is slowing one specific page down.
Sitechecker and WebPageTest rarely compete for the same job. Sitechecker is a cloud subscription that crawls sites, tracks keyword rankings, watches an AI Visibility Tracker for ChatGPT and Perplexity citations, and ships white-label reports on a schedule, starting at $89 a month with no free tier. WebPageTest is free at its core, has no rank tracking or client reporting layer at all, and instead gives you the deepest waterfall, filmstrip, and raw HAR diagnostics available anywhere, run on real browsers across more than 30 global locations. If the deliverable is a monthly client report showing rankings and technical health, Sitechecker fits. If the deliverable is answering exactly why a specific page is slow, WebPageTest is the tool every serious performance engineer reaches for first.
The tools at a glance
Sitechecker
SEO command center for agencies managing multiple client sites, with crawling, rank tracking, technical issue detection, and AI visibility tracking from a unified dashboard.
Sitechecker packages the workflows an agency checks on repeatedly, crawling, rank tracking, Google Search Console data, and alerting, into a single cloud dashboard. It is built around accounts you log back into, not tests you run once and forget. When a tracked site's rankings or crawl status shifts past a threshold, the alerts system flags it before a client has to ask what happened.
The AI Visibility Tracker is the feature that separates Sitechecker from a plain crawler-plus-rank-tracker combo, monitoring whether a site is cited in ChatGPT and Perplexity responses so agencies can fold AI search reporting into an existing client deliverable rather than buying a second tool for it. White-label reports strip Sitechecker's own branding for client-facing delivery.
What Sitechecker does not offer is performance diagnostic depth. There is no waterfall breakdown, no filmstrip, and no way to see exactly which request or script is holding up a page load. It has no API outside the Enterprise tier and no free trial, so evaluating the platform means committing $89 a month before you know whether the workflow fits.
| Feature | Basic $89/month | Standard $219/month | Premium $379/month | Enterprise Contact for pricing |
|---|---|---|---|---|
| Website crawler | Yes | Yes | Yes | Yes |
| Rank tracker | Yes | Yes | Yes | Yes |
| AI Visibility Tracker | No | Yes | Yes | Yes |
| White-label reports | No | Yes | Yes | Yes |
| API access | No | No | No | Yes |
| Free trial | No | No | No | No |
WebPageTest
The open-source gold standard for deep web performance diagnostics, trusted by engineers at Google, Mozilla, and every serious web team.
WebPageTest is the open-source diagnostic tool that has been the reference benchmark for front-end performance work for more than fifteen years, originally built by AOL engineer Patrick Meenan and now maintained by Catchpoint. It runs tests on real Chrome, Firefox, or Edge instances across more than 30 global locations, which is the part that makes it different from tools that only emulate a browser.
The output is where it earns its reputation: a full waterfall of every request with connection, DNS, SSL, and response timing, a frame-by-frame filmstrip showing what a user actually sees as the page loads, and a Lighthouse audit bundled into the same run. No-Code Experiments let you test a hypothetical change, like removing a third-party script, before an engineer touches the codebase. None of this requires a login, and the public instance is free.
The trade-off is that WebPageTest assumes you already know what you are looking for. There is no client-facing report builder, no rank tracking, and no scheduled monitoring on the free tier. The Pro API, at $9.89 a month, adds continuous monitoring and priority queueing for teams that want to automate testing rather than run it manually, but the interface itself stays built for engineers, not for a client-facing dashboard.
| Feature | Free Free | Pro API (Starter) $9.89/month |
|---|---|---|
| On-demand tests | Shared queue | Priority access |
| Global test locations | 30+ | 30+ |
| Filmstrip and video replay | Yes | Yes |
| Lighthouse integration | Yes | Yes |
| API access | No | Yes |
| Continuous monitoring | No | Yes |
Head-to-head feature comparison
| Feature | Sitechecker | WebPageTest |
|---|---|---|
| Deployment | Cloud dashboard | Web app (public instance or self-hosted) |
| Website crawling / technical audit | Yes | No |
| Rank tracking | Yes | No |
| AI Visibility / LLM citation tracking | Yes (Standard plan and above) | No |
| Waterfall and filmstrip diagnostics | No | Yes (waterfall, filmstrip, raw HAR) |
| Real browser testing across global locations | No | Yes (30+ locations) |
| Lighthouse integration | No | Yes |
| White-label client reports | Yes (Standard plan and above) | No |
| Scheduled monitoring and alerts | Yes | No (Pro API only) |
| API access | Enterprise only | Pro API tier ($9.89/mo) |
| Free tier | No | Yes |
| Starting price | $89/month | Free |
Considering AI Peekaboo alongside Sitechecker and WebPageTest?
Sitechecker's AI Visibility Tracker is gated behind the Standard plan and has no API to move the data anywhere else, and WebPageTest has no AI-answer-engine coverage of any kind, which makes sense since it is built for page-load diagnostics, not brand citation tracking. AI Peekaboo is built specifically to track how brands are cited across ChatGPT, Perplexity, and Gemini, and it ships a read and write API on every plan from $50 a month alongside white-label reporting. For agencies that want AI visibility to be the primary product rather than a bolt-on feature or a missing one, it is a more direct fit than either tool here.
Read the AI Peekaboo review →Which should you choose?
SitecheckerWebPageTestSitecheckerWebPageTestWebPageTestSitecheckerWebPageTestThese two tools are not really fighting over the same budget line. Sitechecker is a subscription you keep paying because it is doing recurring work in the background: crawling, tracking rankings, watching AI citations, and generating reports a client can open without a login. WebPageTest is a test you run when you have a specific question, like why LCP regressed after last week's deploy, and the answer needs to come from a real browser waterfall rather than a summary score. An agency running client accounts month over month needs Sitechecker's always-on layer. The same agency's engineer, trying to fix the actual page that is slow, opens WebPageTest to find the culprit.
Bottom line
Pick Sitechecker if you need an always-on dashboard for crawling, rank tracking, and AI visibility reporting that you can hand to a client with your own branding on it, and $89 a month with no free trial is acceptable for that. Pick WebPageTest if your job is diagnosing performance problems at the request level, since the free tier already outperforms most paid competitors and the $9.89 Pro API is cheap for teams that want to automate testing. Most agencies end up needing both: Sitechecker for the client-facing monthly report, WebPageTest for the engineer who actually has to fix what the report flags.
Frequently asked questions
Is WebPageTest a replacement for Sitechecker, or the other way around?
Neither replaces the other because they solve different problems. WebPageTest diagnoses why a single page is slow using real browser waterfall and filmstrip data, while Sitechecker tracks rankings, crawls sites for technical issues, and delivers white-label reports on a recurring schedule. An agency doing client work typically needs Sitechecker for ongoing monitoring and WebPageTest for deep performance troubleshooting when something breaks.
Does WebPageTest really have no cost at all?
Yes, the public instance at webpagetest.org is free with no account required, and it includes full waterfall, filmstrip, and Lighthouse data across more than 30 global test locations. The Pro API, starting at $9.89 a month, only adds priority queueing, continuous monitoring, and programmatic access for teams that want to automate testing rather than run it manually.
Can Sitechecker do the kind of deep performance diagnosis WebPageTest does?
No, Sitechecker's crawler flags on-page technical issues and broken links but does not produce a waterfall breakdown, filmstrip, or request-level timing data. For that level of performance diagnosis, WebPageTest or a dedicated monitoring tool like SpeedCurve or DebugBear is the correct choice.
Why does Sitechecker cost $89 a month when WebPageTest is free?
They are priced for different jobs. Sitechecker's price covers ongoing crawling, rank tracking, AI Visibility Tracker monitoring, and white-label client reports delivered on a schedule, which is recurring infrastructure a WebPageTest account does not provide. WebPageTest is free because it runs on-demand diagnostic tests rather than maintaining a monitoring dashboard or generating client-facing reports.
Does either tool track how a site is cited in AI search results like ChatGPT?
Sitechecker does, through its AI Visibility Tracker, which monitors citations in ChatGPT and Perplexity responses on the Standard plan and above. WebPageTest has no equivalent feature and is not built for brand citation tracking; its focus is exclusively page-load performance.
Is WebPageTest too technical for someone without a performance engineering background?
It can be. WebPageTest surfaces raw waterfall and filmstrip data without much interpretation, which rewards users who already understand terms like TTFB, render-blocking resources, and layout shift. Sitechecker's interface is more guided and better suited to someone who wants a summarized report rather than a diagnostic deep dive.