A Private SMS Gateway You Run on Your Own Network
Send SMS and MMS through your own GSM/LTE modems or Android phones. Lifetime license, no per-message fee, and message data that never leaves your network.
30-day money-back guarantee. Windows 10, 11 and Server.
Channel
Your own GSM/LTE modem, modem pool or Android phone.
License
Lifetime license from $99, or $49 for a 1-year license. No per-message fee.
Data
Numbers, text and delivery logs stay in your database.
System
Windows 10, Windows 11 and Windows Server 2016+.
What is an on-premise SMS gateway?
An on-premise SMS gateway is software installed on a computer you control. It sends and receives text messages through SIM cards in your own GSM/LTE modems or phones. No third-party platform sits in the message path, so phone numbers, message text and delivery logs stay in your database.
Your hardware is the outlet
One USB dongle, a multi-port modem pool or an old Android phone. If it has a SIM card, it can send.
Paid once
Editions are licensed per computer, from $99 for a lifetime license or $49 for a 1-year license. Messages cost whatever your SIM plan costs.
Local by default
Contacts, templates and delivery reports live in a local SQL database you can back up, export or delete.
Native Windows app
A desktop interface plus an HTTP API, SMPP v3.4, SQL listener, webhook and command line.
Your SIM cards are the sending channel
Pick the channel you already own. Every channel below is driven by the same Windows application and the same local API.
| Channel | What you need | How it connects | Typical fit |
|---|---|---|---|
| USB dongle / single modem | One Huawei, ZTE or SIMCom modem and a SIM card | COM port on the PC | 1–2 SIMs, low to medium volume, laptops and small offices |
| Modem pool | 4 to 32 port USB or RS-232 pool | Several COM ports, sent in parallel | Higher volume, SIM rotation, marketing lists |
| Android phone | Android 4.0 or newer, same Wi-Fi or a USB cable | Gateway app over local HTTP | Fastest setup, MMS, phones already on site |
Channel availability and throughput depend on your carrier and SIM plan. See which modems and phones we support and the ten-minute self test.
Four integration paths, one local gateway
Your existing application keeps its own logic. It talks to SMS Deliverer on your LAN, and the software handles the modem, the encoding and the delivery report.
POST from any app
A local endpoint accepts recipients, text and a sending device. Works from PHP, Python, .NET, Java or a scheduled script.
Standards-based bind
Bind as a client or connect applications to the built-in SMPP server. Useful when you already have an SMPP client in production.
Drop rows in a table
A listener polls an outbox table in MySQL, SQL Server or Oracle, sends each row and writes the result back.
Call your own URL
On inbound SMS or a delivery report the gateway calls a URL you own. Nothing is forwarded to a vendor.
On-premise vs cloud: what actually changes
Cloud platforms are convenient when you have no hardware and no fixed volume. The table below is the honest trade-off, not a slogan.
| Dimension | Cloud CPaaS (Twilio, Sinch and similar) | SMS Deliverer (on-premise) |
|---|---|---|
| Billing | Per-message price plus platform fees | Lifetime or 1-year license, published on the pricing page |
| Marginal cost per message | Fixed unit price, grows with volume | Zero inside your SIM plan |
| Data location | Passes through a third-party server | Your own database and network |
| When the internet is down | Usually unavailable | Still sends on an isolated LAN |
| Sender identity | Rented number or short code | Your real SIM number, shown to the recipient |
| Account risk | Traffic can be paused by the platform | No platform-side suspension; your carrier rules still apply |
| Integration | REST API and SDKs | HTTP API, SMPP v3.4, SQL, webhook, CLI |
Comparison reflects published cloud pricing as of 2026-11. A full cloud comparison page is scheduled for the next release.
Supports
Windows 10/11/Server, one or more USB or RS-232 modems, a local SQL database, LAN-only operation.
Not supported
No hosted short codes, no number rental, no carrier A2P registration service, no guaranteed delivery.
Depends on
Throughput depends on modem model, SIM plan and carrier throttling; MMS support depends on the carrier.
Built for messages that cannot wait
Four jobs where a cloud dependency is the weakest link.
OTP and 2FA
Verification codes sent over a LAN call, with the phone number never leaving your network.
Infrastructure alerts
Server, switch and temperature alarms that still leave the building when the internet does not.
Lifetime license, priced in public
Three editions, two license terms each. Prices below are as of 2026-11 and are the same on the pricing page.
Standard
- Single-device sending
- SMS, contacts, scheduling
- Delivery reports
Enterprise
- Multi-port SIM sending
- Everything in Standard
- SIM rotation and quotas
Ultimate
- MMS campaigns
- SMPP and HTTP API
- Everything in Enterprise
Questions buyers ask
Do I need an internet connection to send SMS?
No. Messages leave through your SIM card and your modem or phone, and the HTTP API works on a local network. Internet is needed only to download the installer and to reach remote support.
What hardware do I need to start?
A Windows PC with one free USB port, one GSM/LTE modem with a SIM card, or an Android phone running the gateway app. Nothing else is required; the trial runs on the same hardware.
Is there any per-message fee?
No. You pay for the license once, or once a year, and your carrier bills the SIM plan you already own. There is no platform fee per message and no credit system to top up.
How many messages can it send per hour?
A single modem sends one message at a time, so throughput follows your modem and your carrier's rules. Multi-port modem pools send in parallel. Per-model measurements are being published in the modem compatibility library.
Can I import contacts from Excel or CSV?
Yes. The phone book accepts CSV and Excel imports, applies your blacklist before sending, and keeps an opt-out flag per contact.
Which Windows versions are supported?
Windows 10, Windows 11 and Windows Server 2016 or later. Both 32-bit and 64-bit installers are available on the download page.