▸ 03 / Insights
Insights
By Sudhanshu Kumar
May 8, 2026 · 6 min read · ↗ Medium
Is bulk SMS still relevant in a world run by WhatsApp, email and push notifications?
Despite competition from WhatsApp and email, SMS still posts ~90% open rates and ~45% response rates — making it irreplaceable for time-sensitive alerts and authentication flows where delivery cannot be in doubt.
By Sudhanshu Kumar
May 1, 2026 · 7 min read · ↗ Medium
Why the next decade of aggregator growth won't be won by whoever has the cheapest routes
SMS aggregators have to evolve past competing on price and uptime. Enterprise customers now expect omnichannel messaging, unified APIs and modern compliance — and that asks for a technology partnership, not a price list.
By Sudhanshu Kumar
Feb 16, 2026 · 9 min read · ↗ Medium
Stop paying per OTP — how we built WhatsApp-based 2FA for Keycloak 26.x
A practical guide to securing apps with WhatsApp 2FA and centralized SSO. Eliminate per-message SMS OTP costs by sending verification codes through an app your users already have open.