UserProof

UserProof / YC homepage check / Klavis AI

Klavis AI homepage check

Checked October 28, 2026 · Spring 2025 · klavis.ai

90out of 100 · Good · #192 of 378

Klavis AI (High Quality Coding & Agentic Data for AI labs) scored 90 out of 100 on our homepage check, #192 of 378 YC startups and #19 of 39 in Spring 2025. It passed 8 of 10 checks. The biggest problem: "Sign Up" is 32px tall on mobile (under 44px is easy to miss).

Klavis AI home page on a phone
Klavis AI on a 390px phone, October 28, 2026. Outlined: “Sign Up”, the button we tested.
  • Pass
    A sign-up, demo or get-started button on the first phone screen“Sign Up” is on the first screen.67% of YC startups pass this.
  • Pass
    The main button does something when tapped“Sign Up” opens https://www.klavis.ai/auth/sign-in.99% of YC startups pass this.
  • Pass
    Nothing covers the main buttonNothing sits on top of it.96% of YC startups pass this.
  • Fail
    The main button is at least 44px tall on a phone (−5 points)"Sign Up" is 32px tall on mobile (under 44px is easy to miss).65% of YC startups pass this.
  • Pass
    The page fits a phone screenNo sideways scrolling on a 390px-wide phone.100% of YC startups pass this.
  • Pass
    No JavaScript errors from the site's own codeNone seen while loading and tapping the main button.95% of YC startups pass this.
  • Pass
    No broken links to the site's own pages19 internal links checked.97% of YC startups pass this.
  • Pass
    Everything that looks clickable respondsClickable things on 3 pages responded.90% of YC startups pass this.
  • Pass
    Loads in under 4 seconds on desktop and 6 on a phoneLoaded in 2.9s on desktop and 3.1s on a phone.75% of YC startups pass this.
  • Fail
    Images and files load (−5 points)Https://www.klavis.ai/docs?_rsc=fg3r0 returns 404.92% of YC startups pass this.

How Klavis AI compares

Klavis AI is the outlined dot. The top row is all 378 YC startups we checked; the bottom row is Spring 2025.

Score
All startups378 sites
Klavis AI: 90/100
Klavis AI: 90/100
Spring 202539 sites
Kaelio: 100/100Kashikoi: 100/100Labric: 100/100Mesmer: 100/100StarSling: 100/100Anana: 95/100Aravolta: 95/100Avallon AI: 95/100Cashew Labs: 95/100Cohesive: 95/100Human Behavior: 95/100Lapel: 95/100Nimbic AI: 95/100Parsewise: 95/100Partcl: 95/100PgDog: 95/100Vassar Robotics: 95/100Vybe: 95/100Cactus: 90/100Flott HQ: 90/100Freesolo: 90/100Golf: 90/100Atlog: 85/100Third Chair: 85/100Attune: 80/100Bloom: 80/100Bluejay: 80/100Clidey: 80/100Den: 80/100IRBC: 80/100neoncoral: 80/100Paper Instruments: 80/100Naïve: 75/100Plexe: 75/100Prism: 75/100Ralo: 75/100Alkali: 70/100throxy: 70/100Klavis AI: 90/100
Kaelio: 100/100Kashikoi: 100/100Labric: 100/100Mesmer: 100/100StarSling: 100/100Anana: 95/100Aravolta: 95/100Avallon AI: 95/100Cashew Labs: 95/100Cohesive: 95/100Human Behavior: 95/100Lapel: 95/100Nimbic AI: 95/100Parsewise: 95/100Partcl: 95/100PgDog: 95/100Vassar Robotics: 95/100Vybe: 95/100Cactus: 90/100Flott HQ: 90/100Freesolo: 90/100Golf: 90/100Atlog: 85/100Third Chair: 85/100Attune: 80/100Bloom: 80/100Bluejay: 80/100Clidey: 80/100Den: 80/100IRBC: 80/100neoncoral: 80/100Paper Instruments: 80/100Naïve: 75/100Plexe: 75/100Prism: 75/100Ralo: 75/100Alkali: 70/100throxy: 70/100Klavis AI: 90/100

Good (90+)Fair (75-89)Needs work (0-74)Each dot is one startup. Tap a dot to see its page.

Is this your startup?

A scan shows what a first visit looks like. Your real visitors show the rest: where they tap, what they skip, where they leave. UserProof records them and gives Claude Code the one fix that costs you the most signups, with the file and line. Free for 3 sites.

Set up UserProof free

Get the next report

We run this check every month on new YC companies. One email when the next report is out, nothing else.

Other Spring 2025 startups with similar scores

← #192 Kestrel AI · #192 Kuli → · All 378 scores

How we checked

We loaded the home page in Chromium as a 390px phone and a 1366px desktop, found the main button by its words (sign up, book a demo, get started and similar), tapped it once, and checked up to 3 pages for broken links and dead taps. Nothing was submitted. Each failed check costs the points shown. Full method.