SMS has been the casino reactivation workhorse for years. WhatsApp is increasingly replacing it for one simple reason: engagement. Here is how the two stack up for player retention.
Engagement
WhatsApp messages generally see much higher open and reply rates than SMS, because they arrive in the player's primary messaging app alongside personal conversations. For a "we miss you, here are 50 free spins" message, that difference is the whole game.
Rich media
SMS is plain text (MMS exists but is costly and inconsistent). WhatsApp lets you send branded images, redemption QR codes, and quick-reply buttons — so an offer becomes a tappable, claimable experience.
Cost
- SMS: priced per message, and international rates climb fast.
- WhatsApp Cloud API: priced per conversation by country/category.
- WhatsApp via your own number (CasinoComm): flat €250/month for 10,000 messages — no per-message fee.
Compliance
Both require opt-in and easy opt-out. WhatsApp adds platform rules around warm-up and spam behaviour — see avoiding bans. Gambling marketing is regulated in both channels; follow local rules and self-exclusion lists.
When to use which
Use WhatsApp as your primary engagement and offer channel for opted-in players. Keep SMS as a fallback for players who only gave a phone number and never opted into WhatsApp.