Sendlyio
An AI agent that builds and runs cold email campaigns — verified leads, AI-written emails, sent from your own inboxes with built-in deliverability tooling.
sendlyio.com
· Added June 23, 2026
· Last analysed June 23, 2026 · via 
· 40% unique tagline (similar to Proxelion)
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 23 June 2026; the live site may have changed since.
Sendlyio has the basics covered well, with complete legal pages, a thorough launch checklist, and clean crawl signals. What needs work: missing several security headers, tracking cookies set before any opt-in, and incomplete email security.
Launched on Product Hunt on June 23, 2026. The site is hosted on Amazon.com in the United States, with a domain registered 5 weeks before launch. Our crawler found 14 technologies on this site, covering analytics, collaboration, CSS frameworks, and developer tools. The stack includes Tailwind CSS, TanStack Start, and Google Fonts.
Notably, it's a rare TanStack Start sighting, just 28 in our data.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (14) · Indie stack
| DNS |
Spaceship DNS
|
| Hosting |
Vercel
|
| Security | HSTS |
| Business email |
Lark Suite Email
|
| Transactional email |
Resend
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Vite
|
| Font |
Google Fonts
|
| JavaScript library |
TanStack Router
|
| Meta-framework |
TanStack Start
|
| UI library |
shadcn/ui
|
| Analytics |
PostHog
(5)
|
| SEO |
Google Search Console
(2)
|
| Collaboration |
Lark Suite
(2)
|
Infrastructure
Email Security
Storage (4)
| Name | Lifetime | Detected as |
|---|---|---|
| ph_phc_wgipCN427JN8PwiE8eJe5GtPcfrmQy4cRgKRXZEHGJPx_posthog | 1y | PostHog |
| Key | Size | Detected as |
|---|---|---|
| ph_phc_wgipCN427JN8PwiE8eJe5GtPcfrmQy4cRgKRXZEHGJPx_posthog | 831 B | PostHog |
| Key | Size | Detected as |
|---|---|---|
| ph_phc_wgipCN427JN8PwiE8eJe5GtPcfrmQy4cRgKRXZEHGJPx_posthog | 90 B | PostHog |
| ph_phc_wgipCN427JN8PwiE8eJe5GtPcfrmQy4cRgKRXZEHGJPx_primary_window_exists | 4 B | PostHog |
Readiness Breakdown How?
Performance How?
⚠ 2 images: 2 oversized, 2 without width/height
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 CSS signals | +10 |
| AI copy signals | +5 |
| AI onboarding signals | +5 |
| AI palette signals | +5 |
| AI writing signals | +5 |
| AI typography signals | +15 |
| AI layout signals | +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.