Can I send bulk SMS from a SaaS product?

Yes — you can send bulk SMS from a SaaS product, but you need to do it in a way that’s compliant, reliable, and approved by your SMS provider.

What you need

1. An SMS gateway/provider

   • Examples: Twilio, Vonage, MessageBird, Plivo, Sinch, etc.
   • They provide APIs to send messages at scale.

2. User consent

   • In most countries, you need explicit opt-in from recipients.
   • You also need a clear way to opt out (for example: “Reply STOP to unsubscribe”).

3. Compliance with local laws

   • Rules vary by country/region:
     • US: TCPA, CAN-SPAM-like rules for texts, carrier policies
     • EU/UK: GDPR + ePrivacy
     • Other countries have their own telecom/marketing laws
   • Bulk promotional SMS is usually more regulated than transactional SMS.

4. A legitimate use case

   • Transactional alerts, OTPs, notifications, and reminders are usually easier to support.
   • Marketing campaigns often require extra approvals and stricter compliance.

5. Rate limiting and infrastructure

   • Your SaaS should queue messages, retry failures, and respect provider throughput limits.
   • Avoid blasting huge volumes instantly unless your provider allows it.

Important restrictions

• Many SMS providers prohibit unsolicited spam and may suspend accounts.
• Carrier filtering can block messages if your content, sender reputation, or opt-in process is poor.
• In some countries, sender registration or approved messaging templates are required.

Best practice architecture

• Collect consent in your app
• Store opt-in/opt-out status
• Use a message queue for sending
• Track delivery status and failures
• Include compliance keywords and unsubscribe handling
• Separate transactional from marketing messaging

In short

Yes, but only if you have proper consent, comply with regulations, and use an SMS provider that supports bulk messaging.

If you want, I can also help you with:

• a technical architecture for bulk SMS in SaaS,
• a compliance checklist by country,
• or a provider comparison for sending SMS at scale.