The Multi-Vendor Problem
Building a modern app typically requires:
- Email: Transactional emails (welcome, password reset, receipts)
- SMS: OTP verification, notifications
- Auth: User authentication (OTP, magic links, OAuth)
- Payments: Checkout, subscriptions, billing portal
That's 3-4 different APIs, 3-4 different SDKs, 3-4 different dashboards, and 3-4 different billing relationships. Each vendor has its own authentication model, rate limiting, error format, and documentation style.
LANGR consolidates all of these — plus SEO, AI content, and translation — into a single API with one key.
Feature Comparison
| Feature | LANGR | Twilio | SendGrid | Resend | |---------|-------|--------|----------|--------| | Transactional email | Yes | No | Yes | Yes | | SMS messaging | Yes | Yes | No | No | | OTP verification | Yes | Yes | No | No | | Auth (magic links, OAuth) | Yes | Partial | No | No | | Payments (Stripe) | Yes | No | No | No | | SEO audits | Yes | No | No | No | | AI content generation | Yes | No | No | No | | i18n translation (120+ locales) | Yes | No | No | No | | Single SDK | Yes | No | No | No | | Europe-hosted | Yes | No | No | No | | Free tier | Yes | Yes | Yes | Yes |
When to Choose What
Choose Twilio if you need advanced telephony features (voice calls, video, WhatsApp, programmable SIP). Twilio is a telecommunications platform — LANGR is a developer API platform.
Choose SendGrid if you need advanced email marketing features (campaigns, A/B testing, design editor). SendGrid excels at high-volume marketing email.
Choose Resend if you only need email and want the simplest possible API. Resend is focused and minimal.
Choose LANGR if you want one API for everything. LANGR is built for developers who need email + SMS + auth + payments without managing multiple vendors.
Code Comparison
Sending an email
LANGR:
await langr.mail.send({
from: "[email protected]",
to: "[email protected]",
subject: "Welcome",
html: "<h1>Hello!</h1>",
});
Resend:
await resend.emails.send({
from: "[email protected]",
to: "[email protected]",
subject: "Welcome",
html: "<h1>Hello!</h1>",
});
Nearly identical — both wrap the same underlying infrastructure.
Sending SMS + OTP (LANGR only)
// With LANGR — same SDK, same key
await langr.sms.sendOtp({ to: "+4512345678" });
await langr.sms.verifyOtp({ to: "+4512345678", code: "123456" });// With Twilio — different SDK, different key
const twilio = require("twilio")(accountSid, authToken);
await twilio.verify.v2.services(serviceSid)
.verifications.create({ to: "+4512345678", channel: "sms" });
Pricing Comparison
| Plan | LANGR | Twilio (SMS) | SendGrid | Resend | |------|-------|-------------|----------|--------| | Free tier | 100 req/day | Trial credits | 100 emails/day | 100 emails/day | | Mid tier | $49/mo (10K req/day) | ~$0.0079/SMS | $19.95/mo | $20/mo | | What's included | All 7 services | SMS only | Email only | Email only |
With LANGR, $49/month covers email, SMS, auth, payments, SEO, content, and translation. With separate vendors, you'd pay for each individually.
Migration
Already using another provider? LANGR's API follows standard conventions:
npm install @langr/sdk
Replace your email send calls, add SMS/auth/payment as needed. The full API reference documents all 47 endpoints.
Get Started
1. Get a free API key 2. Read the docs 3. View the OpenAPI spec