GTmetrix vs Oncrawl in 2026: free page speed testing vs enterprise crawl, log, and AI bot intelligence
One is a page speed tool almost anyone can run for free in under a minute. The other is a sales-led platform for large sites that unifies crawl data, server logs, and AI bot tracking into one measurement layer.
GTmetrix
Oncrawl- Oncrawl tracks AI bot crawl activity from GPTBot, ClaudeBot, and PerplexityBot at the URL level, plus a separate layer that monitors whether pages are cited in AI-generated answers. GTmetrix has neither capability.
- GTmetrix's free tier includes a full page speed diagnostic with Core Web Vitals and a waterfall chart. Oncrawl has no free tier or self-serve signup at all; access starts with a demo.
- Oncrawl builds server log analysis into its core product, mapping exactly which URLs search engines and AI crawlers visit and how crawl budget is being spent. GTmetrix does not analyze logs at all.
- GTmetrix's paid tiers start at $5.50/month for scheduled monitoring and multi-location testing. Oncrawl is contact-for-pricing only, with no published rate at any tier.
- Oncrawl's REST API exposes crawl, log, and performance data in a format built to integrate with Looker Studio, BigQuery, and Tableau. GTmetrix's API only covers test triggering and result retrieval, and only on Starter plans and above.
- GTmetrix is built to test individual pages one at a time. Oncrawl is built specifically to handle sites with millions of URLs without the hardware limits of a desktop tool.
- Both tools touch "performance" in some sense, but they rarely compete for the same budget: GTmetrix is a one-off or lightweight monitoring tool, Oncrawl is an enterprise data platform sold through a sales conversation.
GTmetrix and Oncrawl get grouped together as "technical SEO tools," but they answer different questions for different budgets. GTmetrix tells you why a specific page is slow: run a URL through it and you get a waterfall chart, a Lighthouse score, and Core Web Vitals, for free if that is all you need. Oncrawl tells you what is happening across an entire site at scale, combining crawl data with server log analysis so you can see exactly which URLs Googlebot and AI crawlers like GPTBot and ClaudeBot are actually visiting, plus a layer that tracks whether your pages are being cited in AI-generated answers. GTmetrix has no log analysis and no bot tracking of any kind. Oncrawl has no free tier, no public pricing, and no meaningful page-speed diagnostic. If the question is "why is this page slow," GTmetrix answers it today for nothing. If the question is "is our crawl budget being wasted, and can AI bots even reach our content," Oncrawl is built for that and GTmetrix cannot help.
The tools at a glance
GTmetrix
Page speed analysis with Lighthouse, Web Vitals, waterfall charts, and performance monitoring.
GTmetrix runs a page through a real Chromium browser and hands back a waterfall chart, a Lighthouse score, and Core Web Vitals, all on the free tier with no credit card required. The waterfall view is the reason it has stuck around as a default bookmark for developers and SEOs: render-blocking resources and slow third-party scripts are visible at a glance, without needing to interpret raw timing data.
Paid plans start at $5.50/month and add multi-location testing, mobile emulation, and scheduled monitoring slots that alert you when a metric crosses a threshold. That turns GTmetrix from a point-in-time check into light ongoing monitoring, which is enough for most freelancers and small agencies watching a handful of client sites.
What GTmetrix does not do is anything resembling crawl or log analysis. It has no concept of crawl budget, no way to see which bots are hitting your site, and nothing that touches AI crawler behavior. It answers "is this page fast," full stop, and does that job well for a price nobody can complain about.
| Feature | Free Free | Solo $5.50/mo | Starter $18/mo | Growth $40/mo |
|---|---|---|---|---|
| On-demand tests | Limited | 50/mo | 200/mo | Unlimited |
| Monitored pages | 0 | 1 | 5 | 20 |
| Test locations | 1 | 7 | 14 | 22+ |
| Mobile testing | No | Yes | Yes | Yes |
| API access | No | No | Yes | Yes |
Oncrawl
Cloud-based technical SEO platform combining crawl data, log analysis, and AI bot tracking.
Oncrawl is built around three data sources most tools keep separate: crawl data, server logs, and performance data. Most crawlers tell you what is on your site. Oncrawl also tells you what search engines and AI crawlers are actually visiting, and how often, by ingesting your raw server logs rather than estimating from a simulated crawl.
The AI layer is the part GTmetrix has nothing to compare against. Oncrawl tracks crawl requests from GPTBot, ClaudeBot, PerplexityBot, and others at the URL level, and it separately monitors whether your content is being cited in AI-generated answers. For teams justifying technical SEO spend to leadership with hard numbers, that combination of crawl-access data and citation visibility is a genuinely different measurement layer than anything a page speed tool offers.
The cost of that depth is access. There is no published pricing and no self-serve signup, only a demo and a custom quote. Configuration also takes real effort: teams without dedicated technical SEO staff will not get full value from the log analysis or the AI bot tracking without investing time to set it up properly. It is a platform for teams that already know they have a crawl or indexation problem worth solving.
| Feature | Enterprise Contact for pricing |
|---|---|
| Pricing model | Custom |
Head-to-head feature comparison
| Feature | GTmetrix | Oncrawl |
|---|---|---|
| Overall score | 8.1 / 10 | 8.0 / 10 |
| Free tier | Yes, full diagnostic on the free tier | No self-serve free tier |
| Page speed / waterfall diagnostics | Yes, waterfall chart plus Lighthouse and Core Web Vitals | No |
| Server log analysis | No | Yes, core feature |
| AI bot crawl tracking (GPTBot, ClaudeBot, PerplexityBot) | No | Yes, tracks bots at the URL level |
| AI-generated answer visibility monitoring | No | Yes |
| Scheduled monitoring / alerts | Yes, on paid plans | Yes, automated alerts on regressions |
| REST API for data export | Test triggering and result retrieval, Starter plan and above | Yes, well-documented |
| BI tool integration (Looker Studio, BigQuery) | No | Yes, Looker Studio, BigQuery, Tableau |
| Self-serve signup | Yes | No, requires a demo |
| Starting price | Free | Contact for pricing (Enterprise) |
Oncrawl tracks AI bot crawl access and answer citation, but only after a sales call.
Oncrawl's AI bot crawl tracking and AI-generated answer visibility monitoring are real, log-verified capabilities that GTmetrix simply does not offer. The catch is access: no self-serve signup, no published pricing, and a demo requirement before you can see whether it fits your budget. AI Peekaboo covers the citation side of that same problem, tracking whether your brand is actually mentioned in AI-generated answers across ChatGPT, Gemini, Perplexity, and Google AI Overviews, with a read and write API on every plan starting at $50/month, white-label reports, and a Looker Studio connector built in. Teams that want AI answer visibility without a sales process tend to look at AI Peekaboo before committing to Oncrawl's enterprise contract.
Read the AI Peekaboo review →Which should you choose?
GTmetrixOncrawlOncrawlGTmetrixOncrawlOncrawlGTmetrixGTmetrix and Oncrawl are not really substitutes for each other. GTmetrix diagnoses a single page in under a minute for free; Oncrawl is an enterprise data platform that unifies crawl, log, and AI bot data for sites where crawl budget and indexation are genuine business problems, and it costs a sales conversation just to see the price. If your site is small enough that GTmetrix's free tier or $5.50/month Solo plan covers what you need, Oncrawl is far more than the job requires. If you are managing a large site with unclear crawl coverage or need to prove AI bots can actually reach your content, GTmetrix has nothing to offer on that question.
Bottom line
Use GTmetrix's free tier for any single-page speed question; it costs nothing and the waterfall chart alone usually points to the fix. Book a demo with Oncrawl only once page speed is a solved problem and the real question has become crawl budget, log verification, or whether AI bots can reach your content at all, since that is the layer GTmetrix was never built to answer.
Frequently asked questions
Is GTmetrix or Oncrawl better for diagnosing why a single page is slow?
GTmetrix is the right tool for a single slow page. It returns a waterfall chart, Lighthouse score, and Core Web Vitals for free in under a minute. Oncrawl has no page-speed diagnostic layer at all; it is built to analyze crawl and log data across a whole site, not to test one URL.
Does GTmetrix track AI bots like GPTBot or ClaudeBot the way Oncrawl does?
No, GTmetrix has no log analysis or bot tracking of any kind. Oncrawl tracks crawl requests from GPTBot, ClaudeBot, PerplexityBot, and other AI crawlers at the URL level by ingesting your server logs directly, which is a core part of the platform rather than an add-on.
Can Oncrawl tell me if my brand is actually cited in ChatGPT or Perplexity answers?
Yes, Oncrawl includes an AI-generated answer visibility layer that monitors whether your pages appear as citations in AI responses, alongside its AI bot crawl tracking. That combination shows both whether bots can reach your content and whether that content is showing up in AI answers.
Why is Oncrawl contact-for-pricing while GTmetrix has a free tier?
The two tools are built for different scales of problem. GTmetrix tests individual page speed and is priced to be accessible from free up to $40/month. Oncrawl unifies crawl data, server logs, and AI bot tracking for enterprise sites with millions of URLs, which is sold through a demo and custom contract rather than a self-serve checkout.
Does GTmetrix have an API for automated testing?
Yes, but only on the Starter plan ($18/month) and above; the Free and Solo tiers do not include it. Oncrawl's REST API is available as part of its enterprise access and is built to feed crawl, log, and performance data into tools like Looker Studio, BigQuery, and Tableau.
Which tool should a large site with crawl budget problems use?
Oncrawl is built specifically for this. Its combination of crawl data and server log analysis shows exactly where crawl budget is being wasted on low-value URLs, something GTmetrix cannot do since it has no log ingestion or full-site crawl capability at all.