FourLine
Bring all your AI chats into one place. FourLine is a powerful browser extension that lets you use multiple AI services side-by-side in a unified workspace, supercharging your research, writing, and coding workflows.
Added July 17, 2026
· Last analysed July 17, 2026 · via 
· 50% unique tagline
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 17 July 2026; the live site may have changed since.
FourLine has the basics covered well, with complete legal pages, a thorough launch checklist, and clean crawl signals. Worth fixing first: missing several security headers and incomplete email security.
Launched on Product Hunt on July 17, 2026. The site is hosted on Amazon.com in the Netherlands, with a domain registered 4 months before launch. Our crawler found 6 technologies on this site, covering AI builders, DNS providers, email forwarding, and web fonts. The stack includes Framer, Google Fonts, and HSTS.
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Tech Stack (6)
| DNS |
Namecheap DNS
|
| Security | HSTS |
| Email forwarding |
Namecheap Email Forwarding
(2)
|
| Font |
Google Fonts
|
| JavaScript library |
Motion
|
| AI builder |
Framer
(6)
|
Infrastructure
Email Security
Storage (0)
Readiness Breakdown How?
Performance How?
⚠ 7 images: 6 oversized, 1 without width/height, 7 missing alt text
Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI writing signals | +3 |
| Recognised AI builder signature | +100 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.