Seolyzer vs SpeedCurve in 2026: crawl budget diagnostics vs performance benchmarking
Seolyzer fuses crawl data, server logs, and Google Search Console to explain what Googlebot actually does on your site. SpeedCurve measures how fast your pages load for real users and benchmarks that against named competitors.
Seolyzer
SpeedCurve- Seolyzer streams real-time server log data to show actual Googlebot crawl behavior. SpeedCurve has no log analysis; it measures page load performance through synthetic testing and real user monitoring.
- SpeedCurve's competitive benchmarking tracks named competitor URLs on identical testing methodology. Seolyzer has no competitor comparison feature of any kind.
- Neither tool publishes a price without contact: Seolyzer requires a demo for all tiers, while SpeedCurve publishes Starter at $90/month and Growth at $576/month, with Enterprise requiring a custom quote.
- SpeedCurve's business impact correlation connects performance metrics like LCP to conversion rate and revenue. Seolyzer has no equivalent; its cross-analysis connects crawl, log, and GSC data instead.
- Both tools offer API access for programmatic integration: Seolyzer from its Professional tier, SpeedCurve on every tier including Starter.
Seolyzer and SpeedCurve both fall under technical SEO, but they answer different questions entirely. Seolyzer tells you what Googlebot did: which pages it crawled, how often, and where that behavior diverges from what Google Search Console reports, using real-time log analysis fused with crawl data. SpeedCurve tells you how fast your pages actually are: synthetic tests and real user monitoring tracked over time, with competitive benchmarking that lines your Core Web Vitals up against named competitors on identical methodology. Neither tool substitutes for the other. Seolyzer is a crawl-and-indexing diagnostic; SpeedCurve is a performance engineering platform that happens to matter for SEO because page speed is a ranking and UX factor. Teams solving a crawl budget or indexing problem need Seolyzer. Teams that need to justify performance investment with business impact data need SpeedCurve.
The tools at a glance
Seolyzer
Technical SEO data platform combining site crawling, real-time log analysis, and Google Search Console in one interface
Seolyzer is a French technical SEO platform built around three data sources most tools keep separate: a site crawler, real-time server log analysis, and Google Search Console. Its cross-analysis mode fuses all three so you can see discrepancies between what your crawler finds, what Googlebot actually visited, and what GSC reports as impressions, which is the kind of gap that explains why technically sound pages sometimes never get indexed.
The log streaming is real time, not a weekly batch import, which matters during migrations or when diagnosing why crawl budget is being spent on URLs that add no SEO value. The API lets teams pull crawl, link, and log data into their own workflows; ManoMano uses it to extract millions of internal links for data science work, which gives a sense of the scale Seolyzer is built to handle.
There is no public pricing and no page speed or performance monitoring of any kind in the platform. Seolyzer answers "what did Googlebot do and why," not "how fast does this page load for a real visitor."
| Feature | Starter Contact for pricing | Professional Contact for pricing | Enterprise Contact for pricing |
|---|---|---|---|
| SEO Crawler | Yes | Yes | Yes |
| Log analysis | Yes | Yes | Yes |
| Cross-analysis (data fusion) | No | Yes | Yes |
| API access | No | Yes | Yes |
| Scheduled / recurring crawls | No | Yes | Yes |
SpeedCurve
Web performance monitoring platform that tracks site speed through synthetic testing and real user monitoring, with competitive benchmarking and business impact correlation.
SpeedCurve was founded by Steve Souders and Mark Zeman, two well-known names in web performance engineering, and it shows in the feature set: synthetic testing and real user monitoring in one interface, Core Web Vitals tracked over time with regression alerts tied to deployment events, and CI/CD integration via API so performance budgets can fail a build before a regression ships.
What sets it apart from a standard speed monitoring tool is competitive benchmarking. You add competitor URLs and SpeedCurve tracks their performance alongside yours using identical methodology, so you can see whether you actually gained ground or just got faster while a competitor got faster too. Business impact correlation goes a step further, connecting LCP or load time to conversion rate, which turns a performance metric into a number a non-technical stakeholder will act on.
Pricing starts at $90/month for Starter and jumps to $576/month for Growth, with Enterprise on a custom quote. That is a steep climb for a team without a dedicated performance function, and the interface assumes a level of performance literacy that simpler tools do not require.
| Feature | Starter $90/month | Growth $576/month | Enterprise Contact for pricing |
|---|---|---|---|
| Synthetic monitoring | Yes | Yes | Yes |
| Real user monitoring | Yes | Yes | Yes |
| Competitive benchmarking | Limited | Yes | Yes |
| Business impact correlation | No | Yes | Yes |
| API access | Yes | Yes | Yes |
Head-to-head feature comparison
| Feature | Seolyzer | SpeedCurve |
|---|---|---|
| Site crawler | Yes | No |
| Real-time server log analysis | Yes, real-time streaming | No |
| Cross-analysis (crawl + logs + GSC) | Yes (signature feature) | No |
| Synthetic performance testing | No | Yes |
| Real user monitoring | No | Yes |
| Competitive benchmarking | No | Yes (Starter limited, full from Growth) |
| Business impact correlation | No | Yes (Growth and up) |
| API access | Yes (Professional and up) | Yes, all tiers |
| Public pricing | No, demo required | Yes |
| Starting price | Contact for pricing | $90/mo |
Which should you choose?
SeolyzerSpeedCurveSpeedCurveSeolyzerSpeedCurveThese tools rarely compete for the same budget line because they solve different problems. Seolyzer is a crawl and indexing diagnostic: it explains why Googlebot behaves the way it does on your site. SpeedCurve is a performance measurement and benchmarking platform: it explains how fast your site is and what that speed is worth in business terms. A large site with both a crawl budget problem and a page speed problem needs both tools running in parallel, not a choice between them.
Bottom line
Pick Seolyzer if the open question is what Googlebot is actually doing on your site and why pages are not getting indexed. Pick SpeedCurve if the open question is how your Core Web Vitals compare to named competitors and whether performance work is moving the business metrics that matter. Most enterprise technical SEO programmes eventually need both; they are not substitutes for each other.
Frequently asked questions
Do Seolyzer and SpeedCurve solve the same problem?
No, they solve different problems entirely. Seolyzer diagnoses crawl budget and indexing issues using server log analysis and Google Search Console data. SpeedCurve measures page load performance through synthetic testing and real user monitoring, with competitive benchmarking against named rivals. A team could reasonably run both at the same time without overlap.
Is SpeedCurve worth the price jump to Growth at $576 a month for a mid-size team?
Business impact correlation and full competitive benchmarking only unlock at the Growth tier, so if either of those is the reason you are evaluating SpeedCurve, the Starter plan at $90/month will not deliver it. Teams without a dedicated performance function or the budget to act on benchmarking data are usually better served by a cheaper monitoring tool until performance becomes a named priority.
Can Seolyzer track Core Web Vitals or page speed?
No. Seolyzer is built around crawl data, server log analysis, and Google Search Console integration. It has no synthetic testing, real user monitoring, or Core Web Vitals tracking. For page speed measurement, you need a dedicated performance tool like SpeedCurve.
Does either tool have a free trial?
Neither Seolyzer nor SpeedCurve advertises a public free trial. Both route through a sales conversation or contact form before you can evaluate pricing or access, though it is worth asking directly during that conversation since neither rules it out explicitly.
Which tool gives better data for a client-facing quarterly business review?
SpeedCurve, if the review is about performance and competitive standing. Its competitive benchmarking charts show your site's speed relative to named competitors over time, which is a clean visual for a QBR. Seolyzer's cross-analysis data is more useful internally for diagnosing technical problems than for a client-facing performance narrative.
Does SpeedCurve integrate with CI/CD pipelines the way developers expect?
Yes. SpeedCurve's API supports programmatic test triggering, performance budget checks, and historical data retrieval, which teams can wire into a deployment pipeline to fail a build when a metric crosses an agreed threshold. Seolyzer's API is built for crawl, link, and log data instead, and has no performance budget or CI/CD concept.