Perpetual licence, one payment
Own your SMS gateway
Send, receive and automate SMS from your own Android phones and SIM cards, on a server you control.
Lifetime licence €69, paid once7-day money-back guarantee
A student? The same gateway for €3, paid once for a year. See the student edition
From zero to your first SMS in fifteen minutes
Install the gateway
One command on your server, a computer at your office or a free-for-life cloud machine.
Pair your phones
Install the Android app and scan the QR code shown on your dashboard. Nothing to retype.
Send and receive
From the dashboard, from your own code through the API, or automatically with rules. Replies land in your inbox.
What you actually get
Screens of a working gateway, not drawings. The figures are those of a demonstration installation.
Screen 1 of 7
A real inbox
Every SMS your phones receive lands in a thread. Your team replies from the browser, from the number your correspondent already knows.
Screen 1 of 7: A real inbox
Why own your SMS gateway
Your data stays with you
The gateway runs on your machine, with its own local database. Your messages and contacts never pass through our servers and we store no copy of them.
A single payment
No subscription, no per-message billing. The marginal cost of a message is whatever your carrier plan charges.
No volume limit in the software
We set no quota and count no message. What you can send depends on your SIM cards and your carrier's terms.
Built to outlast our outages
If our server goes down, your gateway keeps sending for at least 30 days. An outage never withdraws a licence and never loses a message: if sending ever pauses, it resumes by itself as soon as we are back.
Work out what you pay today
Enter your real volume: the table compares the cumulative cost at market providers with the single payment for the licence.
Cumulative cost over 24 months
| Provider | Per month | Total for the period |
|---|---|---|
| Twilio | €500.00 | €12,000.00 |
| SMS Flow | €53.00 | €1,272.00 |
| SimGate | €19.00 | €456.00 |
| SelfhostsmsLicence paid once | €0.00 | €69.00 |
You save €11,931.00 over the period against the most expensive offer.
The licence pays for itself in the first month against Twilio.
Calculation assumptions
Public list prices observed at each provider for an international SMS, converted into the selected currency. A flat monthly subscription is assumed for SimGate, since no public per-volume grid exists. What a message really costs a cloud provider depends on the destination country, the sender type and carrier surcharges: use this to compare orders of magnitude, then check your own destinations.
Indicative estimate. The real cost of a message sent from the gateway remains whatever your carrier plan charges.
Competitor rates checked on 25 September 2026.
Is this for you?
The situations people send from. Each one opens a page that says what to set up, step by step.
We cut our text-messaging bill by about ninety percent, and in one month we put more than 16,000 messages through our own SIM cards, nearly 13,000 of them in a single week.
Transactional notifications
Order confirmations, technical alerts, one-time codes: the shortest path between your code and a phone.
Appointment reminders
Cut no-shows with templates, scheduled campaigns and an automatic reply.
Two-way customer support
An inbox for the number your customers already write to, with assignment, labels and automatic replies.
Delivery and order tracking
Tell people where their parcel is, with a tracked short link and a reply they can send back.
Alerting your team when e-mail is not enough
An SMS arrives when the network is down, the inbox is full and nobody is at a screen. On-call alerts, from your own machine.
Reaching people who have no smartphone, no data and no app
SMS needs no application, no account and no internet connection. For a large part of the world, that is not a fallback, it is the channel.
Reading mobile money confirmations in real time
Mobile money operators confirm a payment by SMS long before they give you an API. Your gateway receives that SMS, your webhook fires, your order is marked paid.
Your messages never leave your infrastructure
This is not a setting you switch on. It is where the software runs.
Your Android phones
They hold the SIM cards, and they are what actually sends and receives.
Your gateway
The program you installed, on your server or on a machine at home. It serves the dashboard.
Your data
Messages, your customers' contacts, history: one file on your disk, and nowhere else.
What never happens
- No relay through our servers, at any point
- No copy of a message or a contact on our side
- No third party between you and your carrier
- No export to request: the data is already yours
What does leave, and exactly what it carries
A licence check, about once a day. It carries your licence key over HTTPS (we keep only a fingerprint of it), the version, a machine fingerprint and how many phones are paired. No message, no number, no contact.
At a glance
The six differences that weigh most on the bill and on the risk.
| Criterion | Twilio and brokers | SimGate | SMS Flow | SelfhostsmsSelf-hosted, paid once |
|---|---|---|---|---|
| Pricing model | Pay as you go, forever | Monthly subscription | Per message sent and received | One payment, for life |
| Where your data lives | The vendor's servers | Relayed through their cloud | Stored in their cloud | Your machine, local database |
| Conversation interface | No, API only | Basic | History table | Two-way inbox |
| Message length | Automatic splitting | Automatic splitting | Capped at 500 characters | Unlimited, with segment counter |
| Multi-device balancing | Not applicable | Yes | No, device is mandatory | Yes, with per-SIM quotas |
| If the vendor's server goes down | Service stops | Service stops | Service stops | Nothing stops for at least 30 days |
Frequently asked questions
What happens if you go out of business?
Your gateway keeps running: the product and your data are on your machine, and your licence is yours from the moment you buy it. An outage or the disappearance of our server stops nothing for at least 30 days, never withdraws a licence and never loses a message. The licence agreement sets out exactly what happens beyond that. Keep your key, your installation files and your backups.
Do I need a permanent Internet connection?
Not permanently. The gateway needs the local network to talk to your phones, the Internet if you call its API from outside, and a short licence check with our server about once a day. That check carries no message and no contact, and it can fail for up to 30 days without stopping anything. Our central server is never on the path of a message.
What does a message really cost?
Whatever your carrier plan charges, and nothing more. We bill neither the message sent, nor the message received, nor the number of devices.
How is the gateway installed?
A single command, on your own server or on a free-for-life machine at a cloud provider. The installation guide walks through every step, up to pairing the first phone.
What exactly does the licence cover?
An unlimited right of use in time on its major version line, and every update of that line free for life, security fixes included. A future version 2 will be a paid upgrade.
Can I move to another server after buying?
Yes. The machine fingerprint is reset from your account area, without contacting us and at no extra cost.
Do I need an Android phone?
Yes, at least one, running Android 8 or later, with an active SIM card and an SMS plan. It stays on charge and connected to your gateway: treat it as a piece of equipment, not as the phone you carry around. You can pair as many as you like, the licence never counts them.
Do I need my own SIM cards?
Yes, and that is the whole point: the message leaves from your SIM, on your own plan, which is why we bill nothing per message. You need an active SIM whose plan allows the sending you intend, since your carrier's terms and messaging policies still apply. An unlimited-SMS plan is usually what makes the bill collapse compared with a cloud provider.
Can I use several SIM cards at once?
Yes. The gateway spreads sending across every phone and every SIM you pair, and each SIM has its own daily quota, which you set to stay within what your carrier allows. You choose the rule: round robin, by carrier prefix, or a specific SIM for a specific campaign.
What if it does not suit me?
You have 7 days from your purchase to ask for a refund, from your customer area, on the order concerned, with no justification to give. You get back what you paid, less the transfer fees taken by whoever carried your payment: those fees stay with them, and the net amount is shown to you before you confirm. The licence is then withdrawn from the installation, by a signed decision your gateway verifies: that is the only counterpart. Beyond 7 days, a refund remains due wherever the law requires it.
Am I eligible for the student edition, and how do I ask?
If you are enrolled at a school or a university, whatever your subject: name your institution in your account, upload a proof of enrolment (a student card, a certificate of enrolment or a campus badge) and add your academic address if you have one, which we verify by a code sent to it. We read every request by hand and answer in your account, and you pay only once it is approved. The edition holds every feature of the full licence, capped at 30 text messages a day for 12 months, then you ask again with the proof of that year. The pricing page states its price and the one condition it carries.
You do not rent your SMS gateway. You own it.
One payment, your own phones and SIM cards, your own server. No subscription, ever.
Lifetime licence €69, paid once7-day money-back guarantee
Lifetime licence €69
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