COMPARISON
MailKaka vs Postmark
Postmark has a strong reputation for transactional deliverability. It's a fair comparison on send reliability -- the differences that matter most for Indian teams are region, currency, and what happens when a customer hits reply.
| MailKaka | Postmark | |
|---|---|---|
| Sending region | Mumbai, India (AWS ap-south-1) | No India region -- US/EU routing |
| Free tier | 3,000 emails/month, no fixed daily cap | 100 emails/month (no expiry, but low volume) |
| Entry paid plan | ₹899/month (25,000 emails) | $15/month (~10,000 emails, plus per-1,000 overage) |
| Billing currency | INR via Razorpay, GST invoicing | USD only |
| Inbound email | Ready-made shared team inbox out of the box | Inbound webhook parsing available -- you build the inbox UI yourself |
| Compliance framing | DPDP Act-mapped privacy policy, India data-processor language | US-based, no India-specific compliance framing |
Postmark figures reflect postmarkapp.com/pricing as of September 2026 -- always confirm current details on their site before deciding, since pricing pages change.
WHY TEAMS SWITCH
Four things that actually matter.
A much larger free tier. Postmark's free plan caps out at 100 emails a month -- barely enough to finish testing an integration. MailKaka's free tier is 3,000 emails/month with no fixed daily cap.
No forex, no GST guesswork. Postmark bills in USD. MailKaka bills in INR through Razorpay with GST-compliant invoicing.
Replies land somewhere, without you building it. Postmark can parse inbound email and forward it to a webhook -- but turning that into an actual shared inbox your support team can work from is left to you. Every MailKaka domain ships with that inbox already built.
Data stays in India. Postmark doesn't offer an India sending region. If your DPDP Act compliance work assumes Indian data residency, that's worth knowing before you build on it.
MIGRATING
Switching from Postmark.
MailKaka's API follows Resend's request shape, not Postmark's /email format, so this isn't a one-line swap -- you'll change the request body, not just the endpoint. Sender identity, recipient arrays, and HTML/text bodies map directly.
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.
FAQ
Is Postmark's deliverability better than MailKaka's?
MailKaka sends through AWS SES's Mumbai infrastructure with guided SPF/DKIM/DMARC setup. Postmark has a long, well-documented track record on deliverability specifically -- if inbox placement is your primary concern and India infrastructure isn't a requirement, that history is worth weighing.
Can I use MailKaka just for the reply inbox and keep my current sender?
MailKaka's inbox is tied to domain authentication on MailKaka's sending infrastructure. Running a separate sender alongside a MailKaka inbox on the same domain isn't a supported setup today.
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