A Sinch alternative that runs on your own SIM

SimGate replaces per-message Sinch billing with a flat monthly plan. Send and receive SMS through your own Android phone — your number, your SIM, clean REST API.

Your own number

Flat monthly pricing

No per-message fees

Inbound webhooks included

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Sinch versus sending from your own SIM

Sinch is a global CPaaS with a wide product surface — A2P messaging, voice, video, and its Sinch Verify verification product. For teams that need international carrier reach at scale it's a strong choice, but every message carries a per-segment cost and the sender number is provisioned by Sinch.

SimGate takes the opposite approach: connect an Android phone, and your existing SIM becomes the sending route. Recipients see your real number, cost is a flat monthly plan rather than per-message billing, and inbound texts arrive as signed webhooks without a separate product subscription.

For OTPs, alerts, and two-way conversations at low-to-mid volume, the SimGate model is simpler to reason about and significantly cheaper at typical indie or small-team send rates.

SimGate vs Sinch at a glance

	SimGate	Sinch
Pricing model	Flat monthly plan	Per-message + number rental
Sender number	Your own SIM/number	Provisioned virtual number
OTP / verification	Send codes via your own API	Sinch Verify (separate product)
Inbound SMS	Signed webhooks included	Metered inbound, extra setup
Setup	Install app, scan QR, call the API	Account, number, A2P registration
Best for	OTP, alerts, two-way chat, indie devs	High-volume A2P, carrier-grade reach

The same REST API you expect

bash

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

POST /v1/sms/send with your API key — SimGate routes it through your connected phone.

When SimGate is the better fit

Sending OTPs and 2FA codes from your real number
Server, uptime, and monitoring alerts to your team
Two-way conversations with keyword auto-replies
Appointment reminders and booking confirmations
Side projects and internal tools that shouldn't carry per-message fees

Where Sinch has the edge

Sinch is the right choice when you need global carrier-grade A2P throughput, short codes, number masking, or Sinch Verify's fully-managed verification flow across many countries. SimGate is a focused tool for sending from your own SIM at predictable cost — it doesn't try to replace a global CPaaS for enterprise volumes.

Frequently asked questions

Is SimGate cheaper than Sinch?

For most low-to-mid volume use cases, yes. Sinch bills per message plus number rental; SimGate charges a flat monthly plan. At typical indie or small-team volumes the difference is significant.

Can I use SimGate for OTP codes like Sinch Verify?

Yes — generate the code in your backend, call the SimGate send endpoint, and verify the input against your stored value. SimGate handles delivery; you keep full control of the verification logic.

Does SimGate support inbound SMS?

Inbound texts to your SIM are delivered as signed webhooks, and you can trigger automation rules for auto-replies or forwards — included in every plan.

Can I receive replies from my users?

Yes. Because you send from your own SIM number, users can reply directly and the response arrives in your inbound webhook as a normal SMS event.

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.

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