Stop juggling Twilio and SendGrid. LANGR unifies transactional email, SMS OTP, authentication, payments, SEO, content, and translation into a single API with one key.
npm install @langr/sdk
11 services, one API key, one SDK. No vendor lock-in.
Self-hosted transactional email via Stalwart SMTP, Europe-hosted with DKIM signing. Read inboxes. Manage domains.
View endpoints →OTP (email + SMS), magic links, Google OAuth. Session management with 30-day tokens.
View endpoints →Domain audits, keyword tracking, rankings, backlinks, competitor analysis, Lighthouse.
View endpoints →AI content generation via Claude. Blog posts, SEO copy, product descriptions, email drafts.
View endpoints →Translate text or JSON to 120+ locales. RTL-aware. Formal/informal register. Batch up to 50 locales.
View endpoints →Install the SDK and start calling any service immediately.
import { LangrClient } from "@langr/sdk"; const langr = new LangrClient({ apiKey: "lk_live_..." }); // Send a transactional email await langr.mail.send({ from: "[email protected]", to: "[email protected]", subject: "Welcome!", html: "<h1>You're in.</h1>", }); // Send SMS OTP and verify await langr.sms.sendOtp({ to: "+4512345678" }); await langr.sms.verifyOtp({ to: "+4512345678", code: "123456" }); // Translate to 4 languages const result = await langr.i18n.translate({ text: "Hello, world!", target_locales: ["da", "de", "ar", "ja"], });
Start free. Scale when you need to.
Looking for a Twilio or SendGrid alternative? LANGR combines what you need in a single, Europe-hosted API.
| Feature | LANGR | Twilio | SendGrid |
|---|---|---|---|
| Transactional email | ✓ | ✕ | ✓ |
| SMS + OTP | ✓ | ✓ | ✕ |
| Authentication | ✓ | ✓ | ✕ |
| Payments | ✓ | ✕ | ✕ |
| SEO audits | ✓ | ✕ | ✕ |
| AI content | ✓ | ✕ | ✕ |
| i18n (120+ locales) | ✓ | ✕ | ✕ |
| Single SDK | ✓ | ✕ | ✕ |
| Free tier | ✓ | ✓ | ✓ |
| Europe-hosted | ✓ | ✕ | ✕ |