Brevo (Sendinblue) email API

Brevo (formerly Sendinblue) offers an API to send transactional e-mail from your application, such as order confirmations and password resets, plus SMS and WhatsApp messages. Use templates with variables, track opens, clicks and bounces through webhooks, and manage contacts and lists. Responses are JSON. The free plan allows 300 e-mails per day; paid plans remove that limit.