Screaming Frog SEO Spider vs Treo in 2026: Structural crawler vs real-user Core Web Vitals monitor
Screaming Frog crawls a site once and shows you what is structurally broken. Treo pulls real Chrome UX Report data on a schedule and shows you how actual visitors experience your pages over time. Neither one substitutes for the other.
Screaming Frog SEO Spider
Treo- Screaming Frog crawls a site by following links to find structural issues. Treo does not crawl; it reads a sitemap to discover URLs and then monitors those URLs for Core Web Vitals over time.
- Treo pulls real Chrome UX Report (CrUX) field data, showing how actual visitors experienced a page over the past 28 days. Screaming Frog has no field data of any kind, only a PageSpeed Insights snapshot through its Google integrations.
- Treo supports competitive benchmarking against competitor domains on Vital plans and above. Screaming Frog has no competitive benchmarking feature.
- Screaming Frog's paid license is a flat £199 a year with unlimited crawled URLs on a single machine. Treo is priced per site monitored, from free for one site up to $375 a month for 50 sites, with API access starting on the $75 a month Vital plan.
- Server log analysis, mapping real Googlebot crawl behaviour against site structure, is included in Screaming Frog's standard license. Treo has no log analysis feature.
- Treo has a genuinely useful free tier for single-site monitoring. Screaming Frog's free tier is capped at 500 crawled URLs, which is workable for evaluation but too small for most real audits.
- Neither tool tracks AI Overviews citations, ChatGPT mentions, or any other AI search visibility signal; both stay scoped to traditional crawl and Core Web Vitals data.
Screaming Frog SEO Spider and Treo both get filed under technical SEO tooling, but they were built to answer different questions. Screaming Frog is a desktop crawler: it walks every link on a site and comes back with broken pages, redirect chains, duplicate metadata, and (through included server log analysis) what Googlebot is actually doing on your server, all for a flat £199 a year. Treo does not crawl anything. It reads your sitemap to discover URLs, then pulls real-world Chrome UX Report (CrUX) data alongside Lighthouse lab scores for those URLs on a recurring basis, so you can see whether actual visitors are experiencing slow LCP or layout shift, not just whether a synthetic test looks clean. One tool is a point-in-time structural audit; the other is a standing Core Web Vitals monitor built on field data.
The tools at a glance
Screaming Frog SEO Spider
The industry-standard desktop crawler for technical SEO audits.
Screaming Frog SEO Spider crawls a site the way a search bot does, following links and cataloguing status codes, title tags, canonicals, and redirects along the way. It runs locally rather than in the cloud, so the free version stops at 500 URLs while the £199 a year license removes the cap entirely, with Chromium-based JavaScript rendering and custom XPath, CSS, or regex extraction included at no extra charge.
Server log analysis is bundled into the standard license rather than sold separately, which is unusual at this price. Upload your Apache, Nginx, or IIS logs and the Spider maps which URLs Googlebot is actually visiting against your site structure, which is genuinely useful crawl-budget diagnosis that most competitors charge extra for.
Its blind spot is anything that happens after the crawl. There is no scheduled monitoring, no field data from real visitors, and no chart showing whether a page got faster or slower this month. Each run is a snapshot of the moment you pressed start, which is exactly what it was designed to be.
| Feature | Free Free (limited to 500 URLs) | Single License £199/year | 5-9 Licenses £189 per license/year | 10-19 Licenses £179 per license/year | 20+ Licenses £169 per license/year |
|---|---|---|---|---|---|
| URL limit | 500 | Unlimited | Unlimited | Unlimited | Unlimited |
| Server log analysis | No | Yes | Yes | Yes | Yes |
| Google integrations | No | Yes | Yes | Yes | Yes |
| JavaScript rendering | No | Yes | Yes | Yes | Yes |
| Custom extraction | No | Yes | Yes | Yes | Yes |
Treo
Core Web Vitals monitoring using real-world Chrome UX Report data.
Treo is built around one job: making Core Web Vitals data accessible and actionable without you having to build your own CrUX API wrapper. Point it at a domain and it reads the sitemap to discover URLs automatically, no manual list-building or script installation required, then pulls both real Chrome UX Report field data and Lighthouse lab scores for those URLs.
That combination matters because a clean Lighthouse score does not always mean real visitors are having a good experience. Treo shows both numbers side by side, plus competitive benchmarking against named competitor domains on paid plans, so you can report that your LCP improved from 3.2s to 2.1s while the category leader sits at 1.8s, context that a single site's Lighthouse score never gives you.
| Feature | Free $0/month | Vital $75/month | Pro $185/month | Scale $375/month | Enterprise Contact for pricing |
|---|---|---|---|---|---|
| Sites monitored | 1 | Up to 5 | Up to 15 | Up to 50 | Custom |
| CrUX field data | Yes | Yes | Yes | Yes | Yes |
| Lighthouse audits | Limited | Hourly | Hourly | Hourly | Custom |
| Competitive benchmarking | No | Yes | Yes | Yes | Yes |
| API access | No | Yes | Yes | Yes | Yes |
Head-to-head feature comparison
| Feature | Screaming Frog SEO Spider | Treo |
|---|---|---|
| Primary use case | Full-site technical SEO crawl and audit | Ongoing Core Web Vitals monitoring |
| Full-site crawling | Yes | No |
| URL discovery method | Follows links from a seed URL | Automated sitemap scanning |
| Server log analysis | Yes, included | No |
| Real-user (CrUX) field data | No | Yes |
| Lighthouse lab audits | No (PageSpeed Insights snapshot only) | Yes |
| Scheduled / recurring monitoring | No (on-demand crawls only) | Yes |
| Competitive benchmarking | No | No on Free, yes on Vital+ |
| Structured data / hreflang validation | Yes | No |
| Custom data extraction | Yes (XPath, CSS, regex) | No |
| API access | Yes (custom extraction / data pipeline) | No on Free, yes on Vital+ |
| Deployment model | Desktop app (Windows, macOS, Linux) | Cloud SaaS platform |
| Free tier | Yes (500 URL cap) | Yes (1 site) |
| Starting price | Free / £199/yr | $0/mo |
Which should you choose?
Screaming Frog SEO SpiderTreoScreaming Frog SEO SpiderTreoScreaming Frog SEO SpiderTreoScreaming Frog SEO SpiderThe overlap between these two is smaller than the shared "technical SEO" label suggests. Screaming Frog answers "what is broken on this site right now," which is a question you ask periodically, before a migration, during a quarterly audit, when something looks wrong. Treo answers "how are real visitors experiencing our pages this week," which is a question you want answered continuously, not just when you remember to run a crawl. A single-site freelancer with no performance mandate can often skip Treo entirely and lean on Screaming Frog's PageSpeed Insights integration. An agency running Core Web Vitals as a recurring client deliverable across a portfolio needs Treo's multi-site dashboard, because re-running manual crawls for that purpose does not scale.
Bottom line
Buy the Screaming Frog license first; at £199 a year it covers the higher-frequency need of finding structural problems and pays for itself on one client engagement. Add Treo once Core Web Vitals monitoring becomes a recurring deliverable rather than an occasional check, starting on the free single-site tier to confirm your pages actually have enough Chrome traffic for CrUX coverage before paying for the Vital plan. If competitive Core Web Vitals benchmarking against a named rival is part of the pitch, Treo is the tool that does it; Screaming Frog cannot.
Frequently asked questions
Can Treo replace Screaming Frog for a technical SEO audit?
No, Treo cannot replace Screaming Frog because it has no crawling function; it reads a sitemap to discover URLs and then monitors those URLs for Core Web Vitals, but it will not find broken links, duplicate titles, or redirect chains the way a full crawl does. Screaming Frog remains the tool for structural auditing; Treo is a companion for the performance-monitoring layer.
Does Screaming Frog use real Chrome UX Report data like Treo?
No, Screaming Frog has no real-user field data of any kind and only pulls a PageSpeed Insights snapshot through its Google integrations, which is a synthetic, point-in-time score. Treo is built specifically around real CrUX field data reflecting how actual Chrome users experienced a page over the past 28 days, which is a meaningfully different and often more accurate signal.
Is Treo worth paying for if I already have a Screaming Frog license?
Yes, if Core Web Vitals need to be watched between audits rather than checked once a quarter, since Screaming Frog has no scheduled monitoring or real-user field data of its own. Start on Treo's free single-site tier to confirm your pages have enough Chrome traffic for CrUX coverage, then move to a paid plan only once monitoring a portfolio or competitor benchmarking becomes a recurring need.
Which tool is cheaper for monitoring a single small site?
Treo is cheaper for single-site Core Web Vitals monitoring since its Free plan covers one site at no cost, though it lacks competitive benchmarking and API access at that tier. Screaming Frog's free version caps out at 500 crawled URLs, which is enough to evaluate the tool but too small for most real audit work, pushing most users toward the £199 a year license fairly quickly.
Does Treo require installing any tracking code on my site?
No. Treo uses Google's public CrUX dataset and runs Lighthouse audits on demand, so there is no script to install and no client-side tracking involved. It discovers URLs automatically from your sitemap rather than requiring manual tagging.
Do either Screaming Frog or Treo track AI Overviews or ChatGPT citations?
No. Neither tool has any AI search visibility feature; Screaming Frog is scoped to structural crawling and Treo to Core Web Vitals monitoring, and neither tracks AI Overviews inclusion, ChatGPT mentions, or any other LLM citation signal. A separate AI visibility tool is needed if that data matters for your reporting.