Introduction
What is Sendr and why use it for email delivery?
What is Sendr?
Sendr is a developer-first email API built for reliability and speed. It handles the infrastructure complexity of email delivery — SMTP connections, bounces, reputation management, and deliverability — so you can focus on your product.
Think of it as a modern alternative to Resend, Postmark, or SendGrid, with a clean REST API and an official TypeScript SDK.
Key features
- Transactional email — Send single emails or up to 100 at once via the batch endpoint
- Marketing email — Built-in CAN-SPAM compliance with
List-Unsubscribeheaders - Campaigns — Manage audience lists and schedule broadcast sends
- Templates — Save reusable HTML templates with
{{variable}}substitution - Webhooks — Real-time delivery events pushed to your endpoint with HMAC verification
- Analytics — Delivery rates, open rates, click rates with time-series data
- Domains — DKIM, SPF, DMARC verification with guided DNS setup
- Contacts & Audiences — Subscriber management with suppression and unsubscribe handling
Plans at a glance
| Plan | Monthly emails | Daily limit | Domains | Price |
|---|---|---|---|---|
| Free | 3,000 | 100 | 1 | $0 |
| Pro | 50,000 | Unlimited | 10 | $18/mo |
| Business | 200,000 | Unlimited | 100 | $79/mo |
| Enterprise | Unlimited | Unlimited | Unlimited | Custom |
Pro and Business plans support overage billing — emails sent beyond the monthly quota are charged per 1,000 emails ($0.50/1K on Pro, $0.35/1K on Business).
Annual billing is available at a discount: Pro at $15/mo ($180/yr), Business at $66/mo ($792/yr).
Quick links
- Quickstart — Send your first email in 5 minutes
- Authentication — API keys and scopes
- API Reference: Emails — Full email endpoint reference
- TypeScript SDK — Official SDK guide
- Error codes — Every error code explained