Own your SMS infrastructure.

A source-available SMS gateway you install once, run on your own servers, and pay wholesale carrier rates through — no per-message markup, no monthly platform fee.

The problem it solves

Every SMS your CRM sends goes through a middleman that marks up the carrier price. At low volume that markup is invisible. As your messaging grows, it quietly becomes one of your larger software costs — and you don’t control the infrastructure it runs on. The SMS Gateway removes the middleman: your CRM talks to your gateway, and your gateway talks to the carriers directly at wholesale rates.

What you get

✓ The full gateway source code — perpetual licence, run it on your infrastructure
✓ A GoHighLevel adapter, plus a generic WebhookAdapter for any CRM that can send a webhook
✓ Setup and configuration documentation
✓ One-time purchase — no per-seat pricing, no recurring platform fee

How it works

Purchase and download

Buy once and receive the gateway source code with setup documentation.

Deploy on your infrastructure

Deploy the FastAPI service, run the Supabase migrations, and connect your SMS transport.

Point your CRM at it

Your CRM’s messaging routes through your gateway at wholesale carrier rates.

Requirements

01 A host for the FastAPI service — Railway, Fly.io, or DigitalOcean
02 A Supabase project — migrations run at setup
03 One SMS transport: an Android device with a SIM running sms-gate.app under Termux, or a Telnyx account — US numbers require A2P 10DLC brand and campaign registration, which has a carrier review queue
04 A CRM that is GoHighLevel or able to send webhooks
05 Comfort deploying software, or a developer who is

Pricing

$79 one-time

Founding tier — one-time purchase, perpetual licence

✓ Full source code
✓ GoHighLevel + webhook adapters included
✓ Setup documentation
✓ No recurring fees

Get the SMS Gateway → Secure checkout via Stripe

Frequently asked questions

Is hosting included?

No — and that’s the point. You run the gateway on your own infrastructure, so you control the stack and pay carriers directly at wholesale rates.

Which CRMs does it work with?

GoHighLevel is supported through a dedicated adapter. Any other CRM that can send a webhook works through the generic WebhookAdapter.

What support is included?

Support covers the documentation and delivery of your purchase. Because the gateway runs on your infrastructure, day-to-day operation is in your hands.

Do I need to be a Flow OS subscriber?

No. The SMS Gateway is sold separately and works independently of the Flow OS subscription.