Letterbucket
Give your newsletter a professional look with custom domains. Publish under your own URL and make your brand stand out.
Estimated origin: Spain
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 25 July 2026; the live site may have changed since.
Letterbucket scores highly overall, with complete legal pages, a thorough launch checklist, and well-configured email security. Visible gaps: missing several security headers and tracking cookies set before any opt-in.
Launched on PeerPush on July 25, 2026. The site is hosted on Amazon.com in the Netherlands, with a domain registered in 2024. The crawl picked up 17 technologies on this site, covering analytics, advertising, seo, and AI builders. The stack includes Clicky, Cloudflare DNS, and Crisp.
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Tech Stack (17)
| DNS |
Cloudflare DNS
|
| Protocol | HTTP/3 |
| Security | HSTS |
| Business email |
Google Workspace
(3)
|
| Transactional email |
SendGrid
|
| Font |
Google Fonts
|
| JavaScript library |
Motion
|
| Advertising |
Facebook Pixel
(3)
|
Google Ads
(3)
|
|
| Analytics |
Clicky
(2)
|
Google Analytics
(4)
|
|
PostHog
(5)
|
|
| SEO |
Google Search Console
|
Yahoo Search
|
|
| Tag management |
Google Tag Manager
(4)
|
| Chat |
Crisp
(5)
|
| AI builder |
Framer
(6)
|
Infrastructure
Email Security
Storage (15)
| Name | Lifetime | Detected as |
|---|---|---|
| crisp-client%2Fsession%2F3d1d6d56-8920-471d-a92c-b9e22bd465c8 | 6mo | Crisp |
| ph_phc_X3s9nNjWK6nLb5bg7sGqKW6jjcAfQcnN1aYVTKY3bUO_posthog | 1y | PostHog |
| _fbp | 3mo | Facebook Pixel |
| _ga | 1y | Google Analytics |
| _ga_10E4WHXSB1 | 1y | Google Analytics |
| _gcl_au | 3mo | Google Ads |
| Key | Size | Detected as |
|---|---|---|
| crisp-client/session/3d1d6d56-8920-471d-a92c-b9e22bd465c8 | 44 B | Crisp |
| crisp-client/session/3d1d6d56-8920-471d-a92c-b9e22bd465c8:e | 13 B | Crisp |
| lastExternalReferrer | 5 B | - |
| lastExternalReferrerTime | 13 B | - |
| ph_phc_X3s9nNjWK6nLb5bg7sGqKW6jjcAfQcnN1aYVTKY3bUO_posthog | 1.7 KB | PostHog |
| _gcl_ls | 277 B | Google Ads |
| Key | Size | Detected as |
|---|---|---|
| ph_phc_X3s9nNjWK6nLb5bg7sGqKW6jjcAfQcnN1aYVTKY3bUO_posthog | 330 B | PostHog |
| ph_phc_X3s9nNjWK6nLb5bg7sGqKW6jjcAfQcnN1aYVTKY3bUO_primary_window_exists | 4 B | PostHog |
| ph_phc_X3s9nNjWK6nLb5bg7sGqKW6jjcAfQcnN1aYVTKY3bUO_window_id | 38 B | PostHog |
Readiness Breakdown How?
Performance How?
⚠ 2 images: 1 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 copy signals | +5 |
| 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.