SMS for your app,
minus the rulebook.

Use these messages anywhere today. Send them through RelayKit Summer 2026.

See how sending works ↓

Write your messages

Templates configured for your app.

Verification

Verification code

Acme: Verification code: 482910. Expires in 10 minutes.

Confirmation code

Acme: Confirmation code: 482910. Expires in 10 minutes.

Recovery code

Acme: Recovery code: 482910. Expires in 10 minutes.

Login code

Acme: Your login code is 482910. Expires in 10 minutes.

Not legal advice — you're responsible for consent and compliance. See our Terms.

Shipping Summer 2026

Configure > Build

Hand them to your AI tool.

Claude CodeCursorWindsurfGitHub CopilotClineCodex

Starting fresh. RelayKit slots into the starter kits you use — ShipFast, Supastarter, MakerKit, Vercel + Supabase.

Already built. Hand our build spec to your AI tool and let it wire up the rest.

import { relaykit } from 'relaykit';

await relaykit.appointments.sendConfirmation({
  to: customer.phone,
  appointment: { time: '2:00 PM Friday' }
});

That's the send.

Build > Test

Real texts to your phone, before you go live.

Your circle of test phones.

Add yourself, your team, your beta testers. Each person verifies once. After that, your app's SMS features work for them the way they will for customers.

A test page, built into your app.

Trigger your real flows — a booking, an OTP, a reminder — and watch the whole loop resolve: sent, delivered, your database updated.

Preview list

Your safe audience for sending test messages, before and after launch.

  • JoelVerified
    (555) 867-8842
  • SarahVerified
    (555) 412-5519
  • MikeInvited
    (555) 290-3301
+ Invite someone

Test > Go live

Simple pricing.

Stage 1

Build for free

Set up your messages. Add the code to your app. Test with real phones. No credit card.

Stage 2

Go live for $49 + $19/mo

We file your registration with carriers. Approval takes about three days. 500 messages included per month. $8 per additional 500. Refund if you're not approved.

Marketing category messages, add $10/mo. Volume pricing above 5,000 messages. US and Canada at launch. We don't handle HIPAA, healthcare-regulated workflows, or enterprise procurement.

We know the rules so you don't have to.

There's a thick stack of carrier regulation behind every text message — who you have to register with, what you're allowed to say, how fast you can send, what happens when someone replies STOP. We've read all of it. You get clean code that drops into your app.

Join the list.

RelayKit adds SMS to the stack you're already building on. Summer 2026 is the target. I'll email you when it's live.

— Joel, solo founder