ReachKit vs Sitechecker

What Sitechecker does better

The free check is fast and covers ground ReachKit does not. It detects broken links, flags content-optimisation issues, and checks PageSpeed for both mobile and desktop — and page speed is a category ReachKit measures not at all. It also ships a Chrome extension that is free with no sign-up and works on any site, so the audit follows you while you browse.

Behind the free tool is a platform aimed squarely at agencies managing many client sites: a website crawler for technical issues, website monitoring for SEO-critical changes, a rank tracker, a Search Console dashboard that lifts GSC's own export limits, an AI visibility tracker, white-label reporting and alerts, plus pay-as-you-go one-time site audits, a migration checker and a bulk URL checker. There is a 14-day free trial with no credit card, and a public API on Premium plans.

If you are managing ten client sites, that is a coherent command centre and ReachKit is not competing for the job.

Where it leaves a solo founder stranded

The free tier is a lead magnet for a platform you are probably not the customer for. Sitechecker's own headline describes it as the SEO command center for agencies managing 10+ client sites — so the free homepage check is the front door to multi-client monitoring, white-label alerts and seat-based reporting. A founder with one product walks in and is sold a control room.

The check itself has the limitation shared by everything in this bracket: it grades the page against best practice with no view of your market. It will tell you a page loads slowly and a link is broken. It cannot tell you which of those is standing between you and the searches your buyers actually run, because nothing in a page audit knows what those searches are.

What ReachKit does instead

ReachKit is built for one person with one product, and the free checker at reachkit.app/tools/on-page-check reflects that: no signup, no email, 30 checks per hour, and 8 on-page signals returned in full — page title, meta description, heading structure, content depth, structured data, canonical URL, social share tags, and images & alt text — each with the concrete fix when it falls short.

It does not check page speed, broken links or Core Web Vitals. If your homepage is slow, Sitechecker will say so and ReachKit will not.

What ReachKit measures instead is the second half of being findable. The 8 signals are combined by geometric mean with your raw search footprint into one 0–100 Discoverability Score, so the number answers whether people can find you rather than how many checks the page passed. Same URL, same score, every time — no language model in the path.

The paid plan turns it into a ranked weekly action plan, one task surfaced per day, each item citing its evidence, with the next weekly scan re-measuring so a gain is attributed to the on-page fix you shipped. €29.50/month, the 50% launch price, locked for life, normally €59.

Who should pick which

Pick Sitechecker if you manage several sites, need rank tracking and change monitoring across all of them, or want page speed and broken links in the same free check.

Pick ReachKit if you have one product and no client roster, and what you want from a checker is not a wider report but an ordered list of what to do about it.