Transactional-only email from Zoho — clean UI, low price.
ZeptoMail is transactional-only. MailKite adds inbound JSON webhooks + unlimited free domains.
A minimal, copy-paste starter. Swap in your own domain and API key.
import { MailKiteClient } from "@mailkite/client";
// One API, your own DKIM-signed domain — no mail server to run
const mailkite = new MailKiteClient({ token: process.env.MK_API_KEY! });
await mailkite.send({
from: "you@yourdomain.com", // any address on a verified domain
to: "user@example.com",
subject: "Hello from ZeptoMail",
html: "<p>Sent in milliseconds via MailKite.</p>",
}); ZeptoMail is Zoho's transactional-only email service, separated from Zoho's marketing products. It offers a clean UI, templates, SMTP + API, and credit-based pricing with no monthly minimum.
Credit-based (~$0.10–0.18/1k)
Email platforms
Full-stack developer email APIs for sending and receiving.
Transactional + SMS API; inbound routing; sibling to MailerLite.
View detailsPolished send API with a React-first SDK; inbound added more recently.
View detailsReceive email as a webhook, send with one API. Unlimited free domains.
View detailsDependable send-only SMTP relay; SMTP-first UX.
View detailsPoint a domain, drop in a webhook URL, and send your first email in minutes. Unlimited domains, no credit card.