Topics — SignupDoggy Blog

All SignupDoggy blog posts grouped by topic: disposable email detection, VPN/Tor detection, fraud API comparisons, signup form optimization, and more.

Topics — SignupDoggy Blog

All SignupDoggy blog posts grouped by topic. This is the hub page for browsing by subject area.

DISPOSABLE EMAIL DETECTION (4 posts)

- The best free disposable email checker API for 2026
- Disposable email detection in Node.js: a 2026 tutorial with code
- Email validation vs email verification: what is the difference?
- The disposable email domain list 2026: how to maintain your own

VPN, TOR, AND PROXY DETECTION (2 posts)

- How to block VPN and Tor signups without blocking real users
- How to detect VPN users at signup (Node.js + fraud API, 2026)

FRAUD API COMPARISONS (4 posts)

- IPQualityScore vs SignupDoggy: an honest comparison
- MaxMind minFraud vs SignupDoggy: which one do you actually need?
- Sift vs SignupDoggy: the 2026 fraud API comparison
- The 7 best fraud detection APIs for indie hackers

SIGNUP FORM OPTIMIZATION (1 post)

- The signup form anti-pattern that costs SaaS 30% of real users

BOT DETECTION AND CAPTCHA (2 posts)

- Cloudflare Turnstile vs a server-side fraud API
- How to stop bot signups without annoying real users

INDIE SAAS AND FRAUD PREVENTION (1 post)

- How SaaS founders should actually get user validation

INTEGRATIONS (1 post)

- How to validate signups with Supabase Auth (with code, 2026)

See /blog for the full reverse-chronological list. See /author/jeffrin-james for the author profile.