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Terms of use

Last updated: 9 November 2026

These terms are an agreement between you and Blast SMS ("we", "us"), the operator of Blast SMS at https://blastsms.site, our API and our mobile app. By creating an account or using the service you accept them. If you use Blast SMS for a business, you accept them on its behalf.

1. The service

Blast SMS lets you send bulk and transactional SMS to mobile numbers, manage contacts, register sender IDs and connect your own systems through our REST API. We deliver messages through licensed mobile network operators and upstream SMS gateways.

2. Your account

  • You must be at least 18 and give accurate details, including a phone number and email address you control.
  • Keep your password, two-factor codes and API token secret. Everything done with your credentials is your responsibility.
  • Tell us at hi@blastsms.site straight away if you think your account has been misused.
  • We may suspend an account that breaks these terms, our Acceptable use policy or the law, or that puts the platform or the networks at risk.

3. SMS units, plans and pricing

  • Your balance is held in SMS units. One unit sends one SMS part (160 GSM characters, or 70 for Unicode such as emoji; longer messages use several parts).
  • Top-ups are converted to units at your rate when the payment is confirmed. Rates are shown on our pricing page and may change. Changes don't affect units you have already bought.
  • Units do not expire while your account is open.
  • Plans change the rate per SMS for their period (monthly, annual or lifetime). An expired plan returns you to the default rate.
  • Refunds follow our Refund policy.

4. Sender IDs

Sender IDs are registered with the mobile networks on your behalf. You must have the right to use the name you apply for and provide any authorisation the networks ask for. Network approval is not guaranteed, and the networks can withdraw a sender ID. Until you have your own, you may send with our shared sender ID.

5. Your content and your recipients

  • You are responsible for every message you send and for having a lawful basis to contact each recipient, as required by the Kenya Data Protection Act, 2019 and the Kenya Information and Communications (Consumer Protection) Regulations.
  • Promotional messages must identify you, offer a free opt-out (for example "STOP"), and must not be sent between 8 pm and 8 am.
  • You keep ownership of your contacts and messages. You give us permission to store and process them only to provide the service, as our Privacy policy describes.

6. Delivery

We submit messages promptly, but delivery depends on the networks and the recipient's phone. We don't guarantee that a message is delivered, or delivered within a set time. Delivery reports come from the networks and may be delayed or missing.

7. API and mobile app

Use the API within its documented rate limits. Don't try to get around limits, probe for vulnerabilities without our written permission, or resell API access without an agreement with us.

8. Availability and changes

We work to keep Blast SMS available but may pause it for maintenance or events outside our control. We may change features or these terms. For material changes we'll notify you by email or in the dashboard at least 14 days ahead, unless the law requires otherwise. If you keep using the service after that, you accept the new terms.

9. Liability

To the extent the law allows, we are not liable for indirect or consequential loss, lost profits or lost data. Our total liability for any claim is limited to the amount you paid us in the three months before the claim. Nothing here limits liability that cannot legally be limited.

10. Indemnity

You agree to cover our reasonable costs if a claim is made against us because of messages you sent or because you broke these terms or the law.

11. Ending the agreement

You can delete your account at any time, as described on our account deletion page. We may end the agreement on 30 days' notice, or immediately for a serious breach. Clauses that by their nature should survive (such as liability and indemnity) continue after the agreement ends.

12. Law and disputes

These terms are governed by the laws of Kenya. We'll first try to resolve any dispute informally. If that fails, the courts of Kenya have jurisdiction.

13. Contact

Blast SMS, Nairobi, Kenya. Email hi@blastsms.site.