CaptionAI
Caption generator free for social media captions. Create Instagram captions, TikTok captions, and LinkedIn captions in seconds with our AI caption generator.
Added June 7, 2026
· Last analysed June 7, 2026 · via 
StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 7 June 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.
CaptionAI has the basics covered well, with complete legal pages, a complete set of security headers, and a thorough launch checklist. Visible gaps: no robots.txt or sitemap and no email security records.
Launched on Product Hunt on June 7, 2026. The site is hosted on Vercel and served through Cloudflare. Our crawler found 13 technologies on this site, covering security, ai api, auth, and baas. The stack includes Clerk, Next.js, and React.
It's also on one of the most common stacks we track, shared by 14,964 launches and more locked down than the typical Product Hunt launch.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (13) · Indie stack
| CDN |
Cloudflare
|
| Hosting |
Vercel
|
| Security |
Cloudflare Bot Management
|
| HSTS |
| Auth |
Clerk
(6)
|
| BaaS |
Supabase
|
| Captcha |
Cloudflare Turnstile
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| Meta-framework |
Next.js
(2)
|
| SEO |
Google Search Console
|
| Payments |
Stripe
|
| AI API |
Groq
|
Infrastructure
Email Security
Storage (9)
| Name | Lifetime | Detected as |
|---|---|---|
| captionai-theme | 1y | - |
| _cfuvid | session | Cloudflare |
| __cf_bm | < 1h | Cloudflare |
| __clerk_db_jwt | 1y | Clerk |
| __clerk_db_jwt_enVr_3LR | 1y | Clerk |
| __client_uat | 1y | Clerk |
| __client_uat_enVr_3LR | 1y | Clerk |
| Key | Size | Detected as |
|---|---|---|
| captionai-theme | 5 B | - |
| __clerk_environment | 6.2 KB | Clerk |
Readiness Breakdown How?
Performance How?
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 |
|---|---|
| Placeholder branding | +10 |
| AI copy signals | +5 |
| AI palette signals | +5 |
| AI writing signals | +5 |
| Unfilled template placeholders | +10 |
| Default scaffold favicon | +10 |
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.