Bulk Email Pre-Filter Kit
A privacy-bounded first-pass filter for buyer-provided email lists. Checks syntax, MX, disposable and role-address signals without SMTP probing or mailbox existence checks. Includes the public Apify Actor link and input/output guidance. 500-address limit per run. No guarantee of deliverability, mail...
Estimated origin: United States
Added August 11, 2026
· Last analysed August 11, 2026 · via 
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 11 August 2026; the live site may have changed since.
Bulk Email Pre-Filter Kit scores highly overall, with complete legal pages, a thorough launch checklist, and well-configured email security. Visible gaps: missing Referrer-Policy and X-Content-Type-Options and tracking cookies set before any opt-in.
Launched on Product Hunt on August 11, 2026. The site is hosted on Heroku and served through Cloudflare, with a domain registered in 2003. We've detected 46 technologies on this site, covering advertising, analytics, marketing, and payments. The stack includes Contentful, Next.js, and React.
It's one of only 27 launches we've crawled running Whop and more locked down than the typical Product Hunt launch.
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Tech Stack (46) · Scale-up stack
| CDN |
Cloudflare
(3)
|
| DNS |
Cloudflare DNS
|
| Hosting |
Heroku
|
Vercel
|
|
| Security |
Cloudflare Bot Management
|
| HSTS |
| Business email |
Google Workspace
(3)
|
| Email marketing |
HubSpot
(4)
|
| Transactional email |
Cloudflare Email
|
Mailgun
|
| CMS |
Contentful
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| JavaScript library |
DOMPurify
|
Zod
|
|
| Meta-framework |
Next.js
(5)
|
| Mobile |
Apple App Store
|
| Advertising |
Facebook Pixel
|
Google Ads
(3)
|
|
Pinterest
|
|
Reddit Ads
|
|
Snapchat Pixel
(4)
|
|
TikTok Pixel
(4)
|
|
X (Twitter) Ads
|
|
| Analytics |
Cloudflare Web Analytics
(2)
|
Google Analytics
(4)
|
|
Mixpanel
|
|
Segment
(3)
|
|
| Marketing |
Apple Domain Verification
|
Facebook Domain Verification
|
|
UpSellit
(2)
|
|
| SEO |
Apple Business Connect
|
Google Search Console
(2)
|
|
LinkedIn
(3)
|
|
| Tag management |
Google Tag Manager
(4)
|
| Ecommerce |
Whop
(2)
|
| Payments |
Basis Theory
|
Checkout.com
|
|
Stripe
(5)
|
Infrastructure
Email Security
Storage (50)
| Name | Lifetime | Detected as |
|---|---|---|
| ajs_anonymous_id | 12mo | Segment |
| bcookie | 12mo | |
| cf_clearance | 12mo | Cloudflare |
| hubspotutk | 5mo | HubSpot |
| lidc | 23h | |
| li_gc | 5mo | |
| m | 1y | - |
| NEXT_LOCALE | 12mo | - |
| sc_at | 1y | - |
| ttcsid | 2mo | TikTok Pixel |
| ttcsid_D93DANRC77UB3EFMUUR0 | 2mo | TikTok Pixel |
| whop-core.ssk | expired | Whop |
| whop-frosted-theme | 12mo | - |
| whop-theme-resolved | 12mo | - |
| whop_sig_id | 12mo | Whop |
| X-AB | 23h | - |
| _cfuvid | session | Cloudflare |
| _ga | 1y | Google Analytics |
| _ga_NGD3HKQGSV | 1y | Google Analytics |
| _gcl_au | 2mo | Google Ads |
| _immortal|deviceToken | 12mo | - |
| _scid | 1y | Snapchat Pixel |
| _scid_r | 1y | Snapchat Pixel |
| _ttp | 2mo | TikTok Pixel |
| _tt_enable_cookie | 2mo | TikTok Pixel |
| _wuid | 1y | - |
| _wuid_link | 1y | - |
| __cf_bm | < 1h | Cloudflare |
| __Host-whop-core.csrf-token | session | - |
| __hssc | < 1h | HubSpot |
| __hssrc | session | HubSpot |
| __hstc | 5mo | HubSpot |
| __stripe_mid | 12mo | Stripe |
| __stripe_sid | < 1h | Stripe |
| Key | Size | Detected as |
|---|---|---|
| ajs_anonymous_id | 38 B | Segment |
| ajs_user_id | 4 B | Segment |
| developer-mode | 5 B | - |
| notification-toasters-enabled | 4 B | - |
| sfx-enabled | 4 B | - |
| u_sclid | 64 B | UpSellit |
| u_sclid_r | 64 B | UpSellit |
| _gcl_ls | 277 B | Google Ads |
| _wuid | 25 B | - |
| _wuid_link_domain | 8 B | - |
| Key | Size | Detected as |
|---|---|---|
| sentryReplaySession | 141 B | Sentry |
| tt_appInfo | 17 B | TikTok Pixel |
| tt_pixel_session_index | 20 B | TikTok Pixel |
| tt_sessionId | 60 B | TikTok Pixel |
| u_scsid | 96 B | UpSellit |
| u_scsid_r | 96 B | UpSellit |
Readiness Breakdown How?
Performance How?
⚠ 6 images: 4 oversized, 2 without width/height
Broken first-party requests (2), worth fixing
- 400 /api/affiliate/resolve-tracking/
- 404 /api/auth/token/
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 palette signals | +5 |
| AI writing signals | +5 |
| AI iconography signals | +5 |
| AI stack signals | +10 |
| Recognised AI builder signature | +100 |
| Round-number metric claim | +5 |
| AI layout signals | +5 |
| Unfilled template placeholders | +10 |
| Stock-image social proof | +5 |
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.