MailKaka vs SendGrid

No permanent free tier. SendGrid's free option is a 60-day trial capped at 100 emails/day -- after that, you're on a paid plan even for low-volume side projects. MailKaka's free tier (3,000 emails/month) doesn't expire.

No forex. SendGrid bills in USD. MailKaka bills in INR through Razorpay.

Built for one job, not twelve. SendGrid bundles marketing campaigns, contact management, and transactional sending into one product. If you only need transactional email and a way to handle replies, that's a lot of surface area you won't use.

Replies land somewhere people can read them. SendGrid's Inbound Parse can post incoming mail to your webhook, but building somewhere for your team to read and answer it is up to you. Every MailKaka domain gets a real shared mailbox by default.

MailKaka's API follows Resend's request shape, not SendGrid's /v3/mail/send format, so this isn't a one-line swap -- you'll change the request body, not just the endpoint. The concepts map directly, though: sender identity, recipient arrays, HTML/text bodies, and attachments all carry over.

await fetch("https://www.mailkaka.in/api/emails", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${MAILKAKA_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    from: "hello@yourdomain.in",
    to: ["customer@example.com"],
    subject: "Welcome aboard",
    html: "<strong>It just works.</strong>",
  }),
});

Full API reference: docs.md migration prompt.