The best SMS provider for iGaming is one that openly accepts licensed gambling traffic, delivers OTPs quickly on direct routes, registers your sender IDs country by country and falls back to other channels when SMS is slow. It should also help you respect local gambling marketing rules, which is where many operators run into trouble; start by checking how each provider’s OTP verification API and onboarding handle regulated verticals.
This guide sets out the criteria that matter for betting and casino operators, then compares six providers using only what each one publishes on its own website.
What should an iGaming operator look for in an SMS provider?
Clear acceptance of gambling traffic
Gambling is a restricted category for many carriers and aggregators. Ask up front whether the provider accepts gambling A2P traffic, for which message types (OTP, account alerts, marketing) and in which countries. A provider that accepts your traffic in one market may be blocked by carrier policy in another.
KYC-friendly onboarding
Expect to share your gambling licence, company documents and sample messages. A provider used to regulated verticals will tell you exactly what it needs and how long approval takes, rather than suspending the account after launch.
OTP speed on direct routes
Registration, login and withdrawal flows depend on codes that arrive in seconds. Ask how traffic reaches the operator network in your top markets, whether routes are direct or through several intermediaries, and how delivery reports are mapped. Test it yourself before signing.
Sender ID registration
A recognisable alphanumeric sender ID builds trust, but many countries require pre-registration, and some reject gambling brands. Our guide to sender ID rules by country covers the common patterns, and Spain now has a dedicated register, explained in our CNMC alias registry guide.
Fallback channels
If SMS is delayed or filtered, the provider should retry on WhatsApp, Viber or another channel automatically, using the same verification.
Responsible gambling and opt-outs
Marketing and transactional traffic should be separable, opt-out handling should be reliable, and you should be able to suppress self-excluded players in real time.
Fraud controls
Bonus abuse and SMS pumping both target sign-up forms. Look for rate limiting guidance, number lookup and pricing that charges verification fees only on success. Our SMS pumping guide explains the attack.
Support when you need it
Big sporting events and promotions happen at weekends and late at night. Ask what support hours and escalation paths the provider commits to in the contract.
Which gambling SMS rules differ by country?
Rules for gambling marketing vary sharply, so your provider and your CRM need to support per-country settings. Three examples:
- Great Britain. The Gambling Commission’s LCCP condition 5.1.12 requires licensees to offer opt-in to direct marketing “on a per product and per channel basis”, with text messages listed as a channel and betting, casino and bingo as products. The Commission confirmed the rule came into force on 1 May 2025. If you send to players in the UK, see our UK SMS gateway page.
- Spain. Royal Decree 958/2020, article 24, allows commercial communications by email or equivalent electronic means only with the person’s consent and prohibits sending them to people in the general gambling exclusion register, people who have self-excluded, or players identified as showing risky behaviour. For sending to Spain, see our Spain SMS page.
- United States and Canada. Twilio’s guidance states that “Gambling traffic is prohibited in the US and Canada on all number types”, and Sinch’s US disallowed content policy also lists gambling. Check the current position with any provider before planning traffic to the United States or Canada.
Marketing rules usually treat OTPs and account notices differently from promotions, but never assume it. Keep templates for each purpose separate and keep records of consent.
How do the main SMS providers for iGaming compare?
We compared six providers on what they state publicly on their own sites as of September 2026. We have not included prices or ratings; ask each provider for a quote on your own traffic mix.
| Provider | Publicly mentions iGaming or gambling | OTP channels stated on its site | Verification product |
|---|---|---|---|
| SMS.to | Operated by Intergo Telecom, a licensed operator serving regulated verticals | SMS, WhatsApp, Viber, Telegram | Verify API with automatic fallback |
| Infobip | Yes, a customer story with an online betting and gaming company | SMS, WhatsApp, RCS, Viber, voice, email | Infobip Authenticate and 2FA API |
| Sinch | US content policy lists gambling as disallowed | SMS, flash call, phone call, data verification | Sinch Verification API |
| Twilio | States gambling is prohibited in the US and Canada | SMS, voice, WhatsApp, email, TOTP, passkeys, Silent Network Auth, push | Twilio Verify |
| Vonage | Has published an article on iGaming in the US | SMS, RCS, WhatsApp, voice, email, silent authentication | Vonage Verify |
| Dexatel | Yes, a gaming page naming iGaming platforms and online casino operators | SMS, WhatsApp, Viber, Telegram, voice, flash call, RCS, email | Dexatel Verify API with fallback |
What does each provider offer iGaming operators?
SMS.to
SMS.to is run by Intergo Telecom, a licensed telecom and CPaaS operator in Cyprus that has been building messaging infrastructure since 2014. The Verify API sends OTPs on SMS, WhatsApp, Viber or Telegram in the order you choose, with automatic fallback. More detail is in the section on how SMS.to fits below.
Infobip
Infobip publishes a case study with GOAT Interactive, an online betting and gaming company in Africa, which used two-way SMS, SMS OTP and A2P notifications. Infobip Authenticate covers SMS, WhatsApp, RCS, Viber, voice and email, plus traffic analysis it calls Signals.
Sinch
The Sinch Verification API offers flash call, SMS, data and phone call verification. We did not find gambling-specific pages on its site, and its US content policy disallows gambling.
Twilio
Twilio Verify supports a wide range of channels, from SMS and WhatsApp to passkeys and Silent Network Auth, and Twilio publishes detailed fraud guidance. Operators targeting North America should note its stated prohibition on gambling traffic in the US and Canada.
Vonage
Vonage Verify lists SMS, RCS, WhatsApp, voice, email and silent authentication, and says Fraud Defender Advanced, which adds AIT protection, is included with Verify. Vonage has also published an article on iGaming in the United States.
Dexatel
Dexatel’s gaming page speaks directly to iGaming platforms and online casino operators and warns that many carriers restrict gambling content. Its Verify API lists eight channels with fallback in a configured sequence.
How should you test SMS providers before you commit?
- Pick your top markets and get test SIMs on the main networks in each.
- Send real OTP templates with your registered sender ID, at peak and off-peak times.
- Measure time to handset and compare it with the delivery report timestamp.
- Force a fallback by using a number without WhatsApp or Viber and check the second channel arrives before the code expires.
- Check verification conversion in a small live pilot rather than delivery rate alone.
- Test support with a real question outside office hours.
- Review the paperwork: accepted use cases, country restrictions and what happens if a carrier changes its gambling policy.
Where SMS.to fits for iGaming operators
Intergo Telecom, the company behind SMS.to, serves regulated verticals including iGaming and fintech and exhibits at iGaming and fintech industry events, so onboarding conversations about licences, use cases and country rules are routine for our team. Here is what the platform gives an operator:
- Multichannel OTP with fallback. The SMS.to Verify API sends on SMS, WhatsApp, Viber or Telegram in the order you set, and moves to the next channel automatically if delivery stalls.
- Billing that follows outcomes. The Verify fee is charged only when the player verifies. App channels are charged only if they deliver; SMS is charged when sent.
- Visibility. Delivery and verification webhooks, searchable logs and charts show completion and drop-off per flow.
- Messaging beyond OTP. The SMS API and SMPP handle account alerts and campaigns, with opt-out tools and a one-click opt-out short link.
- Sender ID guidance. Many countries require registration or pre-approval for A2P traffic, and we guide you on the best setup for each market.
Rules change often. This guide reflects the rules as of September 2026; check with your account manager before launching a campaign.
FAQs
Can I send gambling SMS in the United States?
Generally not. Twilio and Sinch both publish policies listing gambling as disallowed for US messaging, and Twilio states it is prohibited in the US and Canada on all number types.
Are OTP messages treated like gambling marketing?
Usually not, but it depends on the country and the carrier. Keep OTP templates free of promotional content and use a separate flow for marketing.
Do I need player consent to send marketing SMS in Great Britain?
Yes. Since 1 May 2025, Gambling Commission licensees must let customers opt in to direct marketing per product and per channel, including SMS.
What documents will an SMS provider ask an iGaming operator for?
Typically your gambling licence, company registration, the markets you serve and sample messages. Requirements vary by provider and destination.
Planning OTP and player messaging for regulated markets? Talk to our sales team about your countries, volumes and sender IDs.
