Sendmux
Sendmux is an email API that gives every AI agent a real inbox. Send and receive, route outbound through your own providers, and fail over automatically.
Estimated origin: Australia
Added August 25, 2026
· Last analysed August 25, 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 25 August 2026; the live site may have changed since.
Sendmux ships with the launch fundamentals in place, with complete legal pages, a complete set of security headers, and a thorough launch checklist.
Launched on Product Hunt on August 25, 2026. The site is served through Cloudflare, with a domain registered 6 months before launch. We've detected 16 technologies on this site, covering ui library, ai agent, analytics, and captcha. The stack includes Next.js, React, and Tailwind CSS.
It's running the same core stack as 5,474 other launches and tighter on security headers than most Product Hunt launches.
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Tech Stack (16)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| Security | HSTS |
| Business email |
Microsoft 365
(3)
|
| Transactional email |
Amazon SES
|
| Captcha |
Cloudflare Turnstile
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Postman
|
| Framework |
React
|
| Meta-framework |
Next.js
(5)
|
| UI library |
Lucide Icons
|
shadcn/ui
|
| Analytics |
PostHog
|
| SEO |
Google Search Console
|
| Scheduling |
Cal.com
(2)
|
| AI agent | WebMCP |
Infrastructure
Email Security
Storage (0)
Readiness Breakdown How?
Performance How?
⚠ 10 images: 5 oversized, 4 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 CSS signals | +10 |
| AI copy signals | +5 |
| AI onboarding signals | +5 |
| AI palette signals | +5 |
| AI stack signals | +10 |
| 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.