Email API built for scale

Send transactional and marketing email with a single API call. Built-in deliverability engine, template rendering, analytics, and webhook delivery.

Send email at any scale

Bird's Email API handles everything from single transactional receipts to million-recipient marketing campaigns through a single REST endpoint. The same API that powers 40 billion emails per year for enterprises like Binance is available to every developer — with built-in deliverability, template rendering, and real-time analytics.

REST and SMTP

Send via REST API for maximum control or SMTP relay for drop-in replacement of existing infrastructure. Both support template rendering, tracking, and full delivery metadata.

Template rendering

Server-side Handlebars template rendering with dynamic content blocks, conditional logic, and automatic localization. Define templates once and render per-recipient variations at send time.

Batch sending

Send millions of emails per hour with adaptive rate limiting that respects ISP throttling windows. The API handles queuing, retry logic, and backpressure automatically.

Deliverability built into the infrastructure

Most email APIs leave deliverability to you. Bird's Email API includes a full deliverability engine that manages IP reputation, warm-up schedules, and bounce handling automatically — the same system that achieves 99.7% inbox placement across 40 billion annual sends.

Deliverability engine

Automatic IP warm-up scheduling, reputation monitoring, feedback loop processing, and bounce management. The system adapts sending patterns based on real-time ISP signals.

Inline analytics

Open, click, bounce, complaint, and unsubscribe tracking available via API response or real-time webhooks. Per-message and aggregate reporting with full event history.

Dedicated IPs

Dedicated sending IPs with managed warm-up schedules. Isolate your sending reputation from shared infrastructure for maximum control over deliverability.

Bird's Email API handles our 50M+ daily transactional emails with 99.7% inbox placement. The deliverability tools are best in class.

Binance, Growth Marketing