Turn any Android phone into an SMS API
Pair Android phones as SMS gateways, send single or bulk messages with reusable templates, and automate everything with a REST API and webhooks — without paying carrier-grade SMS pricing.
No credit card required on the Free plan · 1 device, 100 messages/month included
From phone to production API in minutes
No SIM cards to buy from us, no per-country carrier contracts — you already own the phone and the plan.
Pair an Android phone
Scan a one-time pairing code from the dashboard to register any Android phone as a gateway device — dual-SIM supported.
Download the Android app (.apk)Send from the dashboard or API
Dispatch a single message, a bulk batch to hundreds of recipients, or call the REST API with a secret key from your own backend.
Track delivery, automate the rest
Watch messages move from queued to delivered in real time, and get signed webhook callbacks the moment status changes.
Built for teams who send SMS in bulk
Not just a pairing tool — a full platform around it.
Multi-device gateway
Pair as many Android phones as your plan allows, each with its own SIM slots, battery and signal telemetry, and live online/offline status.
Single & bulk sending
Send one message or paste a whole recipient list. Bulk sends support per-recipient {{name}} substitution automatically.
Reusable templates
Save common messages once — appointment reminders, OTPs, delivery updates — and reuse them across single and bulk sends.
Delivery tracking
Every message moves through queued → sending → sent → delivered, logged with timestamps and failure reasons when something goes wrong.
REST API & webhooks
Hashed API keys for server-to-server integration, plus signed webhook callbacks on message.delivered, message.failed, and device status changes.
Team workspaces
Invite teammates with a shareable link, manage roles, and keep every workspace's devices and messages fully isolated from every other.
Ship it from your own backend
Every gateway device is reachable through a REST API secured with a hashed secret key — send messages, poll for delivery status, and receive signed webhooks without touching the dashboard.
- Secret keys are hashed at rest, shown once on creation
- Webhook payloads are HMAC-signed so you can verify authenticity
- Interactive API explorer built into every dashboard
curl -X POST https://api.simscribe.io/v1/gateway/send \
-H "x-api-key: sg_live_••••••••••••" \
-H "Content-Type: application/json" \
-d '{
"recipientPhone": "+15552345678",
"content": "Your code is 481920"
}'
# → { "success": true, "data": { "status": "QUEUED", ... } }
Simple plans that scale with you
Start free. Upgrade the moment you outgrow it — cancel anytime.
For trying it out
- 1 gateway device
- 100 messages / month
- Message templates
- REST API & webhooks
For solo developers
- 2 gateway devices
- 2,500 messages / month
- Message templates
- REST API & webhooks
For production workloads
- 5 gateway devices
- 10,000 messages / month
- Team invites & roles
- Priority support
For high-volume senders
- Unlimited devices
- Unlimited messages
- Dedicated onboarding
- Custom contract & SLA
Questions, answered
How is this different from Twilio or a carrier SMS API?+
Instead of paying per-message carrier rates, you relay messages through Android phones you already own using their existing SIM plans. It trades carrier-grade infrastructure for cost — a good fit for teams sending moderate volume who don't need global carrier routing.
What counts as a "device"?+
Any Android phone paired to your workspace through the gateway app, each with its own SIM slot(s). Your plan's device limit caps how many can be paired at once.
Can my whole team use one workspace?+
Yes — generate an invite link from Settings and anyone who opens it joins your workspace as a team member, sharing the same devices, message history, and templates.
What happens if I go over my plan's message limit?+
Sends beyond your monthly limit are rejected with a clear error before anything is queued — nothing sends silently or bills you unexpectedly. Upgrade any time to raise the limit immediately.
Is there a contract or can I cancel anytime?+
Pro is billed monthly with no contract — manage or cancel your subscription any time from Settings via the built-in billing portal.