SMS for developers
The best way to reach users instead of carrier filters. Send verification codes, alerts, and notifications with one API call.
index.ts
import { Relay } from '@relay-works/sdk';
const relay = new Relay('rl_xxxxxxxxx');
const { data } = await relay.messages.send({
to: '+14155551234',
template: 'otp',
data: { code: '847293' }
});
// Delivered in 0.3s ✓US & Canada · 99%+ delivery · $0.025/message
“Went from Twilio signup to giving up. Went from Relay signup to production in 20 minutes.”
“Finally, SMS that doesn't make me read 400 pages of docs.”
“10DLC compliance handled? Sold.”
Integrate this afternoon
Simple API. Works with your stack.
import { Relay } from '@relay-works/sdk';
const relay = new Relay('rl_xxxxxxxxx');
const { data, error } = await relay.messages.send({
to: '+14155551234',
template: 'otp',
data: { code: '847293' }
});
console.log(data);
// { id: "msg_xxx", status: "delivered" }First-class developer experience
The SMS platform we always wished we had.
Test locally
Develop without sending real messages.
$ relay dev
→ localhost:4001
→ localhost:4001
Ship to production
One API key swap. Same code.
RELAY_API_KEY=rl_live_xxx
Debug with confidence
Actual delivery confirmation.
status: delivered
latency: 0.3s
latency: 0.3s
Stop fighting your SMS provider
Twilio
- ✕2+ hours to first message
- ✕Manual 10DLC forms
- ✕Weeks of approval
- ✕$0.055/msg + hidden fees
- ✕400 pages of docs
Relay
- ✓5 minutes to first message
- ✓Automatic compliance
- ✓Instant setup
- ✓$0.025/msg, all-in
- ✓Copy-paste examples
Everything you need
Send messages
One endpoint. Instant confirmation. Automatic retries.
10DLC compliance
We handle carrier registration. You write code.
Delivery tracking
Real-time status. Webhooks when needed.
Local development
Test without spending money.
Simple pricing
$19/month
- ✓1,500 messages included
- ✓$0.025 per additional
- ✓10DLC compliance included
- ✓US & Canada coverage
- ✓Email support
No per-number fees. No setup costs. No surprises.
Open source tools
SMS Dev CLI
Test locally without real messages.
npm install -g @relay-works/sms-dev
Relay Templates
Pre-built, compliant templates.
View on GitHub →
SDKs
TypeScript, Python, Go, Ruby.
View all SDKs →