GTmetrix vs Lumar in 2026: free page speed testing vs a five-part enterprise crawl platform
GTmetrix answers "why is this page slow" for free in under a minute. Lumar is a demo-gated enterprise platform bundling technical SEO crawling, AI brand visibility tracking, accessibility testing, and site speed into one contract.
GTmetrix
Lumar- GTmetrix has a genuinely usable free tier with waterfall charts and Core Web Vitals. Lumar has no free tier, no self-serve signup, and no public pricing at all.
- Lumar includes native AI brand visibility tracking (GEO/AEO) across ChatGPT, Gemini, and Perplexity as part of its platform. GTmetrix has no AI visibility tracking of any kind.
- GTmetrix scores 8.1/10 in our review; Lumar scores 8.3/10, driven mainly by feature breadth (9.2 vs 7.8) rather than value for money, where GTmetrix leads 8.8 to 7.0.
- Lumar bundles WCAG 2.2 accessibility compliance testing directly into its crawl workflow. GTmetrix has no accessibility testing feature.
- GTmetrix tests individual pages you specify; Lumar crawls a site's full URL set as its core function, with speed monitoring as one module inside that larger platform.
- GTmetrix API access starts at $18/month (Starter). Lumar includes API access for data export but requires a sales conversation to get a price at all.
GTmetrix and Lumar both show up under "technical SEO tools," but the gap between them is closer to the gap between a free diagnostic and an enterprise platform than a real head-to-head. GTmetrix runs a page through Chromium and hands back a waterfall chart, Core Web Vitals, and a Lighthouse score, with a usable free tier and paid plans starting at $5.50 a month. Lumar, the rebrand of DeepCrawl, is a five-part enterprise product: full-site crawling, AI brand visibility tracking across ChatGPT, Gemini, and Perplexity, Core Web Vitals monitoring, and WCAG 2.2 accessibility testing, sold entirely through a sales demo with no public pricing. GTmetrix's site speed testing is genuinely one of Lumar's five modules, just not sold or priced separately. If speed diagnostics is the whole job, GTmetrix does it for nothing. If the job is a full enterprise crawl program with AI visibility and accessibility compliance layered in, GTmetrix is not built to compete at that scale.
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 returns a waterfall chart, Core Web Vitals, and a Lighthouse-based score, no credit card required on the free tier. The waterfall view remains the clearest freely available way to see exactly which script or image is holding up a page load, which is why it has stayed a default bookmark for developers for years.
Paid plans start at $5.50 a month for Solo and scale up to Growth at $40, adding monitoring slots, more test locations, and mobile device emulation. API access, useful for wiring speed checks into a CI/CD pipeline, unlocks at the $18 Starter tier.
GTmetrix is a specialist tool and stays one: it has no crawler for site-wide technical SEO issues, no AI visibility tracking, and no accessibility testing. It tests the pages you point it at, cleanly and cheaply, and does not try to be anything more than that.
| 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 |
Lumar
Enterprise website optimization combining technical SEO, AI visibility, and accessibility.
Lumar has grown from a technical SEO crawler into a five-part platform: full-site crawling with AI-powered issue prioritization, AI brand visibility tracking for GEO and AEO, Core Web Vitals monitoring, WCAG 2.2 accessibility compliance testing, and custom analytics with AI-generated remediation code. Site speed testing, the thing GTmetrix does as its entire product, is one module inside that larger contract.
The AI brand visibility layer is the part with no equivalent in GTmetrix at all: Lumar tracks how a brand appears in AI-generated answers from ChatGPT, Gemini, and Perplexity alongside the technical crawl data, which matters for enterprise teams building an answer-engine optimization strategy on top of traditional SEO.
None of it is available without a sales call. There is no published pricing, no free trial, and no self-serve signup, and the platform is built for teams with dedicated technical SEO staff rather than a developer running a quick page speed check. Evaluating Lumar against a free tool like GTmetrix means comparing a known cost of zero against an unknown enterprise number.
| Feature | Enterprise Contact for pricing |
|---|---|
| Pricing model | Custom |
Head-to-head feature comparison
| Feature | GTmetrix | Lumar |
|---|---|---|
| Overall score | 8.1 / 10 | 8.3 / 10 |
| Free tier | Yes, full diagnostic on the free tier | No |
| Page speed / waterfall diagnostics | Yes, waterfall chart plus Lighthouse and Core Web Vitals | Yes, as one module of the platform |
| Full-site technical SEO crawling | No | Yes, core feature |
| AI brand visibility tracking (GEO/AEO) | No | Yes, ChatGPT, Gemini, Perplexity |
| WCAG accessibility testing | No | Yes (WCAG 2.2) |
| Core Web Vitals monitoring | Yes, via its own test runs | Yes |
| API access | Starter plan and above | Yes, for data export |
| Public pricing | Yes | No (demo required) |
| Starting price | Free | Custom (sales-led) |
Lumar bundles AI visibility tracking behind a demo. GTmetrix does not track it at all.
Lumar's GEO and AEO layer, tracking brand mentions across ChatGPT, Gemini, and Perplexity, is a genuine capability, but it only ships as one module inside a five-part enterprise contract with no public pricing. GTmetrix has no AI visibility tracking whatsoever; it is purely a page speed tool. If the actual goal is measuring where a brand shows up in AI-generated answers, without buying a full crawl-and-accessibility platform to get there, AI Peekaboo is a self-serve AEO monitoring platform from $50 per month with a read/write API and white-label reporting, built specifically for that tracking rather than bundled as one line item inside a broader suite.
Read the AI Peekaboo review →Which should you choose?
GTmetrixLumarGTmetrixLumarGTmetrixLumarThis is really a comparison between a specialist and a platform. GTmetrix does one job, page speed diagnostics, better than almost anything else at the price, free tier included. Lumar treats speed testing as a single module inside a much larger enterprise product covering full-site crawling, AI visibility, and accessibility compliance, sold through a sales process with no published cost. Neither pricing model nor feature scope makes one objectively better; they are built for different budgets and different problems, and the overlap between them, page speed and Core Web Vitals, is the smallest part of what either tool actually does.
Bottom line
Use GTmetrix's free tier for any single-page speed question, it costs nothing and the waterfall chart usually points straight at the fix. Book a Lumar demo only once the real need has grown past page speed into full-site crawling, AI answer-engine visibility, or WCAG 2.2 accessibility compliance under one enterprise contract, at which point the sales-led pricing is the cost of consolidating tools you would otherwise be buying separately.
Frequently asked questions
Is GTmetrix or Lumar better for a small business with one website?
GTmetrix is the clear choice for a single small-business site. Its free tier covers Core Web Vitals and waterfall diagnostics with no monitoring platform needed, and even the cheapest paid tier is $5.50 a month. Lumar requires a sales demo and is built for enterprise teams with dedicated technical SEO staff, which is far more than a single-site small business needs.
Does GTmetrix track AI visibility the way Lumar does?
GTmetrix has no AI brand visibility tracking of any kind; it is purely a page speed testing tool. Lumar includes a native GEO and AEO layer that tracks how a brand appears in AI-generated answers from ChatGPT, Gemini, and Perplexity as part of its broader platform.
Why does Lumar have no public pricing while GTmetrix does?
GTmetrix is a self-serve product with a free tier and fixed monthly plans from $5.50 to $40, aimed at developers and small teams who want to buy without a sales process. Lumar is sold as an enterprise platform through a demo-first sales motion, common for tools bundling multiple product areas, crawling, AI visibility, accessibility, that get priced based on site size and contract scope rather than a flat tier.
Does Lumar do everything GTmetrix does, plus more?
On paper, largely yes: Lumar includes Core Web Vitals monitoring as one of its five product areas. In practice, GTmetrix's waterfall chart and page-by-page diagnostic depth is the more direct tool for actually troubleshooting a specific slow page, since that is GTmetrix's entire focus rather than one module among several inside a larger platform.
Which tool is right for an agency serving enterprise clients that need AI visibility reporting?
Lumar is the better fit if the agency wants technical SEO crawling and AI visibility tracking under one vendor contract, accepting the demo-first sales process and lack of published pricing. GTmetrix has no answer for AI visibility at all, so an agency relying on it alone would need a separate tool, such as a dedicated AEO platform, to cover that reporting need.