15five.com website review

Your mobile performance score is 100 (desktop: 85). That is in Google's “good” band (90 and up).

A phone's processor spends 0.0 s on main-thread work while loading, 4 ms of it running JavaScript. That is comfortably low.

Real visitors wait 2.4 s for the largest content to appear (75th percentile). Good is under 2.5 s.

Real visitors wait 170 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

For real visitors the layout shifts by 0.01 (75th percentile). Good is under 0.1.

Real visitors wait 682 ms for your server to start answering (75th percentile). Good is under 800 ms.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 3.0 s to 2.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

The layout barely moves while loading (CLS 0, good is under 0.1).

The first text or image appears after 0.8 s, inside the 1.8 s “good” threshold.

Your largest element renders in 0.8 s on a phone, inside Google's 2.5 s “good” threshold. The largest element is the text “You’ve been blocked for security reasons”.

Visually, the page fills in at 0.8 s (Speed Index), inside the 3.4 s “good” threshold.

Scripts block the page for only 0 ms while loading. Good is under 200 ms.

The page is fully interactive after 0.8 s.

Every sizeable image is WebP, AVIF or SVG.

No image is downloaded at more than three times the size it is drawn on a phone.

Your homepage downloads 2 KiB in 1 request on a phone: HTML 2 KiB (1). That is a lean page.

axe-core 4.13.0, the open-source engine behind most accessibility testing tools, ran 55 WCAG 2.2 A/AA and best-practice rules on the phone render: 49 passed and 6 failed. 4 mores need a person to judge. Automated rules catch about a third of accessibility problems; the rest need manual testing.

Your meta description is 138 characters: “15Five is the performance management platform that creates effective managers, highly engaged employees, and top-perfor…”.

Your main headline reads: “The AI-powered performance management platform built for business impact”.

Your title is a healthy 51 characters: “Continuous Performance Management Software | 15Five”.

The canonical URL is https://www.15five.com/.

Structured data found: VideoObject.

robots.txt is in place.

Your XML sitemap is reachable at https://www.15five.com/sitemap.xml.

Your robots.txt lets the crawlers behind ChatGPT search, Claude and Perplexity read the site and cite it in answers.

Your server sends the page's text in the HTML (1,616 words), so crawlers that don't run JavaScript still read it.

All 15 pages we checked loaded without an error.

No page we checked hands its ranking to a different URL.

Every page we checked has its own title.

Each page we checked has a main headline.

None of the pages we checked carries a noindex tag.

All 15 pages that loaded have a <title>.

No JavaScript errors were logged while the page loaded on a phone.

The page declares a mobile viewport.

The homepage is served over HTTPS (15five.com).

The certificate from Let's Encrypt · YE1 verifies for 15five.com and is valid for another 49 days.

X-Frame-Options or a frame-ancestors policy stops other sites framing yours.

A Content-Security-Policy is set, the main browser-side defence against injected scripts.

Strict-Transport-Security is set, so browsers always use https.

http://15five.com redirects to the secure version.

The server speaks HTTP/2 and advertises HTTP/3, so browsers load many files over one connection.

All 53 links checked from your homepage (40 internal, 13 external) answered without errors.

15five.com was registered in Sep 2000 through Amazon Registrar, Inc.. An established domain carries more trust with email providers and search engines.

CAA records allow only pki.goog, ssl.com, amazon.com and comodoca.com to issue certificates for 15five.com, so a mis-issued certificate from anyone else is refused.

15five.com is registered until Sep 2027.

On a phone, the first screen shows a clear next step: “Pricing” and “Book a Demo”.

The homepage has 13 calls to action, for example “Pricing”, “Book a Demo” and “See Pricing”.

Social proof on the homepage: 33 testimonial or review blocks, 12 customer or partner logos, 6 trust badges and “over 3K customers”.

Analytics detected: Google Tag Manager.

DMARC tells receivers to quarantine mail that fails authentication, and sends you reports.

An SPF record lists your sending servers and tells receivers to reject anything else: “v=spf1 include:mail.zendesk.com include:_s00561516.autospf.email -all”.

A DKIM key is published (selector “s1”, “s2” and “mandrill”), so receivers can verify mail really came from you.

A consent management tool (CookieYes) loads with the page.