Messaging · Software
SMS & WhatsApp Business API Gateway
Send transactional and campaign messages over SMS and WhatsApp Business API — templates, delivery reports and a developer API you can call from anything.
Product screenshot — SMS & WhatsApp Business API Gateway. The client supplies 3 to 6 clean screenshots per product before launch.
Every S-Tech product sends messages: an attendance alert to a parent, a report link to a patient, an overdue reminder to a customer. Rather than depend on someone else's gateway, we built our own. It handles SMS and WhatsApp Business API with template management, scheduling, delivery reporting and a clean REST API, and it is sold on its own to businesses that just need reliable messaging.
Why this exists
What it fixes
These are the problems clients describe to us before they buy. If none of them sounds like your week, this may not be the right product — tell us and we will point you at a better one.
What we hear
Transactional messages are sent from three different vendor panels, so there is no single delivery report and no single bill.
WhatsApp Business API onboarding, template approval and quality rating are confusing to manage alone.
Campaigns are sent from a spreadsheet upload with no way to see which numbers actually received the message.
Developers have to write against a different, badly documented API for every channel.
What is inside
10 modules
Every deployment turns on the modules you need. Nothing here is a separate purchase unless the plan says so.
SMS sending
Transactional and promotional SMS with DLT-registered sender IDs and templates, unicode support and scheduled sending.
WhatsApp Business API
Official WhatsApp Business API messaging with template management, media messages, buttons and list replies.
Template manager
Create, submit and track approval of SMS DLT templates and WhatsApp templates, with variables validated before sending.
Contacts & lists
Contact groups, imports, opt-in and opt-out records, and suppression lists that are honoured on every send.
Campaigns
Bulk sends with scheduling, throttling, per-contact personalisation and a live progress view.
Two-way messaging
Inbound replies routed to a shared inbox or a webhook, with conversation history per contact.
Developer API
REST API with keys, webhooks for delivery and inbound events, rate limits, sandbox mode and clear documentation.
Delivery & analytics
Per-message delivery status, failure reasons, campaign summaries, cost per send and channel comparison.
Fallback rules
Try WhatsApp first, fall back to SMS if undelivered within a window — configured per message type.
Accounts & billing
Sub-accounts for departments or clients, credit balances, usage reports and invoices.
The RFID difference
What RFID adds over manual and barcode
Barcode and manual entry still work everywhere in this product. This is what changes when you add RFID on top.
- When RFID events drive the messages — a student passing a school gate, a bag leaving a blood bank fridge, a pallet leaving a dock — the alert is sent from the same platform, so there is no third-party hop and no extra latency.
Deployment
Cloud, your server, or no internet at all
The same software either way. This is a deployment choice, not a different edition with fewer features.
Cloud
Hosted and managed. Nothing to install, live in days.
Self-hosted
On your own server, inside your building. You own the database.
Runs on
- Web
- REST API
- Android
- Any system that can call HTTPS
Integrates with
- All S-Tech software products
- Any application over REST API
- Webhooks into your own systems
- CRM and marketing tools
- E-commerce platforms
Who it is for
- Businesses sending transactional alerts
- Schools, hospitals and institutions
- E-commerce and delivery businesses
- Software companies needing a messaging API
- Agencies managing messaging for clients
How it is sold
Plan tiers
Actual pricing depends on modules, users, sites and whether you host it yourself, so it is quoted. These tiers tell you where you would sit.
Transactional
SMS and WhatsApp transactional sending, templates, delivery reports and API access.
Get a priceBusiness
Everything in Transactional plus campaigns, two-way inbox, fallback rules and sub-accounts.
Get a priceEvery S-Tech product
The same nine promises, on all 22 products
These are not per-product features. They apply to everything we build, and they are the reason our software works on sites where other systems do not.
RFID-first
Every product is built around RFID speed and modern technology from the start, not bolted on afterwards.
Any RFID hardware
Ready to configure with any make of RFID hardware. Barcode, QR code and traditional manual methods work by default.
Runs anywhere
Web, Windows, macOS, Linux, Ubuntu, Unix and Android. Your team uses the machine it already has.
Online or offline
Works fully online in the cloud, or fully offline on a local server, and syncs when a connection returns.
Self-hosted option
Host it on your own server and keep the data inside your building. No dependence on our infrastructure.
White-label
Available under your own brand — logo, colours, product name and domain.
Customisable
Every deployment is unique. Modules, fields, forms, reports and workflows are changed to fit your process.
Performance & reliability
Built for speed and uptime under real load, on real hardware, in places with unreliable power and network.
Secure by design
Encrypted data, role-based access, full audit trail and scheduled backups. You own the data.
A note on wording: where we say "fully offline" we mean the system runs on a local server on your own network with no internet connection, and syncs when one returns. Where we say "secure" we mean encrypted data, role-based access, a full audit trail and backups you control. We would rather be specific than round it up to 100%.
Questions
Before you ask us
The things buyers actually check. If your question is not here, ask it — we answer honestly, including when the answer is no.
Do you handle WhatsApp Business API onboarding?
Yes. We take you through business verification, the display name, the number and template approval, which is the part most businesses get stuck on.
Is DLT registration included?
We guide you through DLT registration of your entity, sender IDs and SMS templates. The registration itself is in your company name, which is how it should be.
Can we use it only as an API?
Yes. Many clients never open the web panel and call the REST API from their own application. Keys, webhooks and a sandbox are all provided.
Do the other S-Tech products need this?
They work with any gateway. Using ours means one bill, one delivery report and no integration work — which is why most clients do.
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Read moreSee SMS & WhatsApp Business API Gateway on your own data
A demo runs on your process, not a canned dataset. Bring a real scenario and we will show you how it handles it — including the parts it does not.
Or call +91 97305 32888 — Monday to Saturday, 9:30 am to 6:30 pm.