Bulk SMS Service Provider in Chennai for Tamil and English Messages
Looking for a bulk SMS service provider in Chennai? Send supplier schedules, OTPs, patient reminders and T Nagar festival offers in Tamil or English, on direct operator routes, from ₹0.15 per delivered SMS.

Chennai businesses can use SMS Gateway Providers for DLT-compliant bulk, OTP and transactional SMS in Tamil and English. Pricing starts at ₹0.20 per SMS and drops to ₹0.15 on the Business plan, with no monthly fee. Support comes from our Coimbatore team by phone and WhatsApp, Monday to Saturday, 9am to 7pm.
Built for OTP spikes
Up to about 10,000 SMS per second for login and payment OTPs from Chennai apps.
Tamil Unicode templates
Send appointment, delivery and offer messages in Tamil script, 70 characters per part.
Direct operator routes
Direct connectivity to Jio, Airtel, Vi and BSNL with 6+ redundant routes.
Support from Coimbatore
Phone and WhatsApp help in Tamil or English from our Sulur team.
A bulk SMS service provider in Chennai for auto, IT and healthcare
Chennai is a mix of factories, software offices, hospitals and busy retail streets, and each sends a different kind of SMS. A component maker in Oragadam needs supplier schedules to reach vendors on time. An app on OMR needs OTPs in a few seconds. A hospital needs reminders that patients from other districts can read.
Our platform handles all three from one account. Use the web panel with Excel upload for staff and customer lists, or connect your systems over our HTTP, REST or XML API with delivery report webhooks.
How Chennai sectors use SMS
These are the patterns we see most often from businesses in and around the city.
- Auto and component suppliers in Sriperumbudur and Oragadam: vendor delivery slots, gate pass numbers and shift change alerts.
- IT, SaaS and fintech teams on OMR: login OTPs, password resets and transaction alerts sent through the API.
- Hospitals and diagnostic centres: appointment reminders, report ready alerts and admission updates for patients and relatives.
- T Nagar and Purasawalkam retail, including jewellers: festival offers, new arrival notices and gold savings scheme instalment reminders.
- Logistics and freight firms near the port: container pickup times, vehicle numbers and proof of delivery alerts.

Tamil, English and the monsoon months
Chennai audiences are split. Software staff are comfortable with English, while many retail and hospital customers prefer Tamil. Tamil goes as Unicode at 70 characters per part, so a reminder like "உங்கள் சந்திப்பு நாளை காலை 10 மணிக்கு." stays short and fits in one part. We often suggest sending both versions to different segments of the same list.
The northeast monsoon from October to December brings sudden office closures and route changes. Service SMS with an approved template can reach DND numbers at any hour, so keep a few ready-made templates for closure notices, shift changes and delivery delays. For festival sales around Pongal, Aadi and Deepavali, register promotional templates two weeks in advance.
Links, headers and DLT rules to check first
Chennai hospitals, NBFC branches and e-commerce sellers often get stuck on three things. First, since 1 October 2024 only whitelisted URLs, APKs and call-back numbers can appear in SMS, and public URL shorteners are blocked. Register your own domain links on DLT before the campaign. Second, every header is exactly 6 characters, and customers now see a suffix such as -S or -P after it. Third, each template variable can hold up to 30 characters, so long patient or product names need a short form.
We check these points with you before the first send, which saves days of rejected templates.
Support and pricing for Chennai businesses
We do not have a Chennai office. Our team works from Sulur, Coimbatore and supports Chennai customers by phone, WhatsApp, email and screen share during sales hours, while the platform runs 24x7. Enterprise customers get a dedicated account manager and 24/7 phone support.
Starter costs ₹0.20 per SMS for up to 10,000 SMS a month and Business costs ₹0.15 per SMS for up to 1,00,000. Larger senders can ask for Enterprise pricing. GST is extra and you pay only for delivered SMS. DLT registration help is free of service charge; operator fees are paid separately.
How to start in Chennai
Share your use case
Tell us on WhatsApp whether you need OTP, alerts, campaigns or all three, and your rough monthly volume.
Register headers and templates
We help you register a sender ID and Tamil or English templates on DLT.
Integrate the API
Plug our REST API into your app or HMS and point delivery reports to your webhook.
Launch and monitor
Watch delivery and failure reasons in MIS reports and adjust templates as needed.
Frequently asked questions
Do you have an office in Chennai?
No. Our only office is in Sulur, Coimbatore. Chennai customers are supported remotely by phone and WhatsApp on +91 95851 60363 and by email at info@avancezone.com, Monday to Saturday from 9am to 7pm. Most setup work, including DLT help and API testing, is done over a call or screen share.
Can a Chennai app send OTP SMS through your API?
Yes. Use our HTTP or REST API to send OTPs with an approved service template. OTP and service messages can be sent at any time, including to DND numbers. The platform handles up to about 10,000 SMS per second over direct operator routes, and delivery reports can be posted to your webhook.
Which sender ID suffix will my Chennai customers see?
Since 6 May 2025, operators add a suffix to every header. Customers see -S for service messages, -T for transactional messages, -P for promotional ones and -G for government. For example, a hospital reminder might show as AD-MRNCLN-S. The suffix depends on the template category you register on DLT.
How long does a Tamil SMS take up per part?
Tamil uses Unicode, so each SMS part holds 70 characters, or 67 when the message runs to more than one part. English plain text allows 160 characters, or 153 when split. Test your Tamil text in our SMS character counter before registering the template so you know how many parts it will use.
Can T Nagar retailers send festival offers to all customers?
Promotional SMS can go only to non-DND numbers or to customers who have given digital consent, and only between 10am and 9pm. Include only whitelisted links; public URL shorteners are blocked. Under the DPDP Act, honour STOP requests quickly. Service updates such as order ready alerts can reach any customer with an approved template.
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From ₹0.15 per delivered SMS, credits valid for a year, and DLT help from a real person.