A Vonage (Nexmo) alternative built on your own SIM

Skip per-message pricing and number provisioning. SimGate sends and receives SMS through an Android phone you control, with a clean REST API and flat monthly plans.

Your own number

Flat pricing

Signed inbound webhooks

Minutes to set up

Start free Browse comparisons

Why teams look past Vonage

Vonage (formerly Nexmo) is a capable carrier-network SMS API, but it bills per message, rents numbers, and adds the registration and surcharge overhead common to CPaaS platforms.

SimGate replaces that with a phone you already own. Connect an Android device, and your SIM becomes the sending route behind a simple REST API — for one predictable monthly price.

SimGate vs Vonage

	SimGate	Vonage
Pricing model	Flat monthly plan	Per-message + number rental
Sender number	Your own SIM/number	Provisioned virtual number
Inbound + automations	Signed webhooks + rules included	Metered inbound
Setup time	Minutes	Account + number + registration

One endpoint to send

bash

1
curl -X POST https://api.simgate.app/v1/sms/send \
2
  -H "x-api-key: YOUR_API_KEY" \
3
  -H "Content-Type: application/json" \
4
  -d '{
5
    "deviceId": "android-5q15b182f2704gbz",
6
    "phoneNumber": "+1234567890",
7
    "message": "Hello from SimGate!"
8
  }'

Authenticate with x-api-key and POST to /v1/sms/send.

Great for

OTP and 2FA from a real number
Alerts and notifications
Reminders and confirmations
Two-way SMS with automation rules

Frequently asked questions

Is SimGate a drop-in replacement for Vonage?

For sending and receiving SMS from your own number, yes — point your outbound calls at the SimGate send endpoint and configure an inbound webhook. Carrier-specific features like number provisioning or short codes are not part of SimGate's model.

Can I send from my existing number?

Yes — SimGate sends through your Android phone's SIM, so your real number is the sender.

How is pricing different?

SimGate is a flat monthly plan with a generous message allowance, rather than per-message billing plus number rental.

Turn your phone into an SMS API

Send and receive SMS from your own SIM at a flat monthly price. Install the app, connect a device, and call the API in minutes.

Start free