Kumiko · AI window manager for ultrawide and big-screen Macs
Kumiko is a Mac window manager for ultrawide and big monitors. Snap windows with ⌃⌥ and the arrow keys, pick one of six layouts that fit your screen, or just say what you are working on and Kumiko arranges every window.
Found 5 Nov 2026
Live 6 Nov 2026
Analysed 10 Nov 2026
found by FirstSited, also on 
- No contact page
- Contact email
What we found
- There are no SPF or DMARC records, so anyone can send email that claims to come from this domain.
- It sends four of the six security headers we check; missing are Permissions-Policy and Content-Security-Policy.
- Built with Astro, the site is hosted on Vercel, with a domain registered the day of launch.
- It welcomes AI crawlers and publishes an llms.txt.
Built with: 10 technologies
Embed this on your site
For light pages
<a href="https://firstsited.com/launch/5laa39wb/kumiko-ai-window-manager-for-ultrawide-and-big-screen-macs"><img src="https://firstsited.com/badge/5laa39wb/stack.svg" alt="Kumiko tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/5laa39wb/kumiko-ai-window-manager-for-ultrawide-and-big-screen-macs"><img src="https://firstsited.com/badge/5laa39wb/stack.svg?theme=dark" alt="Kumiko tech stack on FirstSited" height="28"></a>
| Technology | Type |
|---|---|
| Infrastructure | |
Spaceship DNS
|
DNS |
Vercel
|
Hosting |
| HSTS | Security |
| Build & Framework | |
Three.js
new
|
JavaScript library |
Astro
(2)
|
Meta-framework |
| Analytics & Marketing | |
Google Search Console
|
SEO |
| Other | |
FoundrList
new
|
Directory |
MacPip
new
|
Directory |
Product Hunt
new
|
Directory |
ScrollLaunch
new
|
Directory |
New means first detected in this snapshot, not in the one before. Each technology links to its own page: which other new sites launched with it.
Site checks
| Custom title and meta description | |
| Open Graph tags (title, image, description) | |
| Twitter card meta tags | |
| Canonical URL declared | |
| Responsive viewport meta tag | |
| Favicon present | |
| Semantic HTML (nav, main, article) | |
| Meta description is 219 characters Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear. |
| Referrer-Policy | |
| X-Frame-Options | |
| Permissions-Policy experimental | |
| X-Content-Type-Options | |
| Content-Security-Policy | |
| Strict-Transport-Security | |
| X-XSS-Protection deprecated, not counted |
| Privacy policy /privacy/ | |
| Terms of service /terms/ |
Mentions: Cookies
| robots.txt | |
| sitemap.xml 1 URLs | |
| security.txt optional | |
| llms.txt | |
| ads.txt only for ad-funded sites | |
| humans.txt optional |
| llms.txt published | |
| No AI bots blocked in robots.txt | |
| Content-Signal none declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF | Not published | |
| DMARC | Not published | |
| DKIM | Not found at common selectors | |
| MTA-STS | Not deployed | |
| TLS-RPT | Not configured |
Without SPF and DMARC, anyone can send email that claims to come from this domain. Those two are the records to add first.
Hosting and network
| Network | AMAZON-02 - Amazon.com, Inc., US AS16509, US |
|---|---|
| DNS | Spaceship DNS authoritative nameservers |
| DNSSEC | Enabled DNS answers are signed |
| Certificate | ZeroSSL GmbH valid 5 Nov 2026 to 3 Feb 2027, as captured |
| Domain age | 6 days registered Nov 2026, Spaceship, Inc. |
| Green hosting | No record per The Green Web Foundation |
| Page build | 4 JS files, 0 CSS files 5 third-party domains, code splitting |
| App manifest | Kumiko display browser; 2 icons |
| Brand colours |
Storage: 0 items
Nothing stored in the browser on page load.
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 147 ms | good, faster than 80% of sites |
| Largest contentful paint | 36,048 ms | slow |
| Layout shift | 0.02 | good |
| Page weight | 325 KB | light |
| Image weight | 46 KB | light |
| Images | 10 | 4 larger than shown, 1 without width and height, 5 without alt text |
| Third-party domains | 5 | |
| Console errors | 0 | none |
| Failed requests | 0 | none |
From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure
Notes
- Looks AI-built: no AI signals. How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.
- Performance comes from one render on 10 November 2026 and will vary between visits.
How we know
FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 10 November 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.