Blog — SignupDoggy · Notes on signup quality, user validation, indie SaaS

Long-form notes on signup quality, user validation, and shipping anti-fraud infrastructure on a budget. By Jeffrin James, founder of SignupDoggy.

SignupDoggy Blog — long-form notes on signup quality, user validation, and the indiechauning of anti-fraud infrastructure. By Jeffrin James, founder.

Posts:
- How SaaS founders should actually get user validation (and why most advice is wrong)
- Best free disposable email checker API for 2026
- How to block VPN and Tor signups without blocking real users
- IPQualityScore vs SignupDoggy: an honest comparison
- Cloudflare Turnstile vs server-side fraud APIs: which actually catches bots?