API-FirstEvery feature available via REST API. Cookie auth for the dashboard, API keys for everything else.
Bring Your Own SMTPConnect Mailgun, SES, Postmark, your VPS, anything that speaks SMTP. No per-email markup.
Open + Click TrackingPixel-based opens and HMAC-signed click redirects, on by default for every send.
WebhooksSix event types with HMAC-SHA256 signing and exponential-backoff retries. Built into Core, manageable from the Pro UI.
Pro AnalyticsFunnel, opens-over-time, top templates, top clicked links and trend pills against the previous period — all from a single endpoint.