SDserhat doganinverifysms.hashnode.dev·Apr 6 · 6 min readThe Refund State Machine That Saved Our SMS Reseller from Bleeding MoneyEvery SMS verification reseller eventually hits the same wall: codes don't always arrive. In our production data over the last six months, the failure rate has been remarkably stable around 28-32% depending on country and service. Telegram in Indones...00
SDserhat doganinverifysms.hashnode.dev·Apr 6 · 6 min readBuilding a Privacy-First Phone Verification Architecture: Lessons from 6 Months in ProductionWhen we started building VerifySMS in late 2025, the SMS verification reseller market was a graveyard. SMS-Activate had just shut down. Half the surviving providers were running on PHP 5.6 with hardcoded IPs. The 'modern' alternatives were Telegram b...00
SDserhat doganinverifysms.hashnode.dev·Apr 2 · 6 min readThe Hidden Economics of SMS: Why Your 6-Digit Code Costs More Than You ThinkThat verification code you just received? It passed through 4 companies, 3 countries, and generated revenue for at least 6 different businesses. The SMS verification industry is a $2+ billion market, and almost nobody understands how it works. I've b...00
SDserhat doganinverifysms.hashnode.dev·Apr 2 · 5 min readThe SMS-Activate Shutdown: Forensic Analysis and What the Industry Should LearnOn December 22, 2025, sms-activate.org disappeared. No announcement. No migration period. No refunds for remaining balances. Over 200,000 monthly active users and thousands of businesses with API integrations woke up to dead endpoints. I've spent thr...00
