SMS Gateway for India
REST API + SMPP · All Operators
ConnexBetter's SMS gateway connects your application to Jio, Airtel, Vi, and BSNL via REST API or SMPP. DLT compliance handled automatically. 99.9% uptime SLA backed by multi-datacenter infrastructure.
Gateway Specifications
| Uptime SLA | 99.9% |
| Transactional delivery | < 5 seconds |
| OTP delivery | < 3 seconds |
| API protocols | REST + SMPP v3.4 |
| Networks | Jio, Airtel, Vi, BSNL |
| DLT compliance | Automatic validation |
| Throughput (REST) | Up to 1,000 req/min |
| Throughput (SMPP) | Custom — up to 10,000 TPS |
| Inbound SMS | Long code + short code |
| International routes | 190+ countries |
Integration Methods
Connect your platform to the SMS gateway using whichever method fits your stack.
REST API
Most PopularJSON/HTTPS — works with any language or platform
SMPP v3.4
EnterpriseBinary telco protocol for very high throughput
HTTP API
LegacySimple GET/POST for legacy system integration
Email to SMS
No-codeSend SMS by emailing a gateway address
Excel Plugin
No-codeUpload CSV/Excel and send bulk SMS without code
Webhooks
DeveloperDelivery reports and inbound messages pushed to your URL
TRAI DLT Compliance — Handled for You
Since 2021, all commercial SMS in India must pass through TRAI's DLT portal. Non-registered messages are blocked. ConnexBetter validates every message before routing:
- 1.Principal Entity (PE) — your business is registered on the DLT portal under your GST and PAN.
- 2.Sender ID (Header) — your 6-character alphanumeric sender ID (e.g. CONNEXB) is registered per telecom operator.
- 3.Message Template — each message type is registered as a template. Variable placeholders ({#var#}) are matched at send time.
Frequently Asked Questions
What is an SMS gateway?
An SMS gateway is a platform that connects your application or software to mobile networks, enabling you to send and receive SMS messages programmatically. ConnexBetter's SMS gateway accepts messages via REST API or SMPP protocol, routes them through carrier-grade connections to Jio, Airtel, Vi, and BSNL, and delivers them to any Indian mobile number. It handles TRAI DLT compliance, message queuing, retry logic, and delivery reporting automatically.
What protocols does ConnexBetter's SMS gateway support?
ConnexBetter supports REST API (JSON over HTTPS) for most integrations — simple, modern, and works with any programming language. For high-volume, low-latency applications (100,000+ messages/hour), we also support SMPP v3.4, the telco-standard binary protocol used by enterprise messaging platforms and SMS aggregators.
What is TRAI DLT and why does it matter for SMS gateway?
TRAI's DLT (Distributed Ledger Technology) portal is mandatory for all commercial SMS sent in India since 2021. Your business name (principal entity), sender ID (6-character header like CONNEXB), and message templates must be registered on the DLT portal. ConnexBetter validates every message against your registered templates before routing it, ensuring 100% TRAI compliance. Non-compliant messages are blocked by operators.
What is ConnexBetter's SMS gateway uptime SLA?
ConnexBetter offers a 99.9% uptime SLA (less than 9 hours of downtime per year) on the gateway platform, backed by multi-datacenter infrastructure and automatic failover across carrier routes. Uptime is monitored continuously and reported on our public status page. Enterprise plans include a dedicated account manager and priority incident response.
Can I use ConnexBetter's SMS gateway to receive incoming SMS?
Yes. Two-way SMS is supported via long codes (dedicated 10-digit mobile numbers) and short codes. Inbound messages are delivered to your webhook URL in real time. Use cases include SMS-based opt-in/opt-out, customer replies to transactional notifications, survey responses, and service activation via keyword (e.g. 'Text JOIN to 9898XXXXXX').
How does the SMS gateway handle failed deliveries?
ConnexBetter's gateway applies intelligent retry logic for temporary failures (network congestion, handset off). Transactional SMS is retried up to 3 times over 60 minutes. Hard failures (invalid number, DND block for promotional) are not retried. All delivery outcomes are reported via webhooks and visible in the dashboard's delivery report.
What is the difference between shared and dedicated SMS gateway routes?
Shared routes use carrier connections pooled across multiple customers — cost-effective for promotional campaigns where delivery within a few minutes is acceptable. Dedicated routes are exclusive carrier connections for your account — used for OTP, transactional, and time-critical messages, with sub-5-second delivery SLA and no queue contention. ConnexBetter automatically routes OTP and transactional messages through dedicated routes.
Connect to India's most reliable SMS gateway
99.9% uptime SLA. DLT-compliant. REST API ready in minutes. SMPP for enterprise throughput.