SMS Gateway Singapore for SSIR-Registered Business Messages
Use our SMS gateway Singapore route to send OTPs, appointment reminders and delivery alerts to +65 numbers under your registered sender ID. We explain the SSIR process and connect your app by API.
An SMS gateway in Singapore sends business messages to +65 numbers. Since January 2023, alphanumeric sender IDs must be registered with the Singapore SMS Sender ID Registry, or messages are labelled Likely-SCAM. Registration needs a Singapore UEN. We guide the process, connect your API and quote rates in INR or USD.
SSIR guidance
We explain UEN, registration and authorisation letters before you send.
Avoid Likely-SCAM labels
Registered sender IDs on the right route display your brand correctly.
OTP API
REST API with delivery webhooks for login and payment codes.
Four-language audience
Send English or Unicode Mandarin, Malay and Tamil text.
Singapore's sender ID registry in short
Singapore runs one of the strictest anti-scam regimes for SMS. Since 31 January 2023, every organisation that sends SMS with an alphanumeric sender ID to Singapore numbers must register it with the Singapore SMS Sender ID Registry (SSIR), run by SGNIC under IMDA. Messages from unregistered IDs are marked Likely-SCAM, which most customers will ignore.
This is the first thing we discuss with any business that asks us about an SMS gateway in Singapore. We check the current rules with you at onboarding.
- Registration needs a valid Singapore UEN. Foreign companies usually get one by setting up a subsidiary or branch with ACRA.
- An overseas affiliate can send using a registered ID if the Singapore entity issues a Letter of Authorisation.
- Registered IDs must be sent through SSIR participating aggregators. Other routes can be blocked or labelled.
- Letter case matters. ACMESG and AcmeSG are treated as different IDs.
- Registry fees are paid by card or PayNow on the SSIR portal and renewed yearly.
Who uses our SMS gateway Singapore service
Clinics and dental practices send appointment reminders. Fintech and SaaS apps send login OTPs. Logistics firms confirm delivery slots, and tuition centres alert parents. Indian companies with Singapore subsidiaries also use us so their India DLT traffic and Singapore traffic sit in one panel.
AvanceZone Technology has worked in bulk SMS since 2000 and routes Singapore traffic through global carrier partners. During onboarding we confirm that your messages will travel through a participating aggregator, so your registered name is kept.
Language and content tips
English is the working language for most business SMS in Singapore. For older customers, a short Mandarin, Malay or Tamil message can help. These use Unicode with 70 characters per part, so keep them brief.
Because of scam awareness, Singapore customers are wary of links. Use your full brand name, avoid public URL shorteners and never ask for passwords or OTPs by SMS. Write the message so it is clear who sent it even without the sender name.
When WhatsApp makes more sense
WhatsApp is widely used in Singapore for chatting with businesses. For order tracking with buttons, customer support or sending invoices and photos, the WhatsApp Business API often works better, and it shows a verified business profile. We are a Meta Tech Provider and set it up with you. Keep SMS for OTPs and alerts that must reach every phone.
Pricing and support hours
Singapore SMS is priced per message and quoted by destination, in INR or USD on request. SSIR registry fees are paid separately to SGNIC. Our team is online Monday to Saturday, 11:30am to 9:30pm Singapore time, by phone, WhatsApp and email. The platform runs 24x7, so OTPs and alerts go out at any hour. If you send to Malaysia as well, we can quote both countries together.
Other countries we send to
We also send SMS and WhatsApp messages to customers abroad, with help on each country's sender ID and consent rules.
How to start in Singapore
Check your UEN
Confirm your Singapore entity and the exact sender ID spelling you want.
Register on SSIR
Register the ID on the SSIR portal and add our partner route as required.
Test delivery
Send test SMS to +65 numbers and check the name shows correctly.
Go live
Connect the API and monitor delivery reports in your panel.
Frequently asked questions
What is the Singapore SMS Sender ID Registry?
The SSIR is a registry run by SGNIC under IMDA. Since 31 January 2023, organisations sending SMS to Singapore numbers with an alphanumeric sender ID must register that ID. Messages from unregistered IDs are labelled Likely-SCAM. The registry helps customers trust that a message really comes from the named business.
Can a foreign company register a sender ID in Singapore?
Registration requires a Singapore UEN. A foreign business usually gets one by registering a subsidiary or branch with ACRA. An overseas affiliate can then send using the registered ID if the Singapore entity issues a Letter of Authorisation. Without a UEN, your messages are likely to be labelled Likely-SCAM.
Why do my Singapore SMS show Likely-SCAM?
Common reasons are an unregistered sender ID, a different letter case from the registered ID, sending before the registration is effective, or traffic travelling through an aggregator that does not take part in the SSIR. We check each of these during onboarding.
Can I send OTPs to Singapore users?
Yes. Many apps send login and payment OTPs to Singapore numbers through our REST API. Keep the message short, in English and within one 160-character part. Delivery reports on your webhook let your app offer a resend or another channel if needed.
How much does an SMS gateway in Singapore cost?
Singapore SMS is charged per message and quoted by destination, in INR or USD on request. SSIR account and sender ID fees are paid separately to SGNIC. Share your monthly volume and the sender IDs you plan to use, and we will send a written quote.
Related pages
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