What sendvia, Resend, Postmark, Mailgun and SendGrid charge for 100,000 emails a month, where sendvia sits, and the arithmetic behind every figure.
sendvia costs $29.00 a month to send 100,000 emails: a flat $19.00 platform fee plus $10.00 of Amazon SES, billed by Amazon straight to your own AWS account at $0.10 per 1,000 emails. That is the whole bill. Nothing is added on top of what Amazon itself charges for the email.
| Emails per month | sendvia | Resend | Postmark | Mailgun | SendGrid | Raw SES |
|---|---|---|---|---|---|---|
| 100,000 | $29.00$19.00 + $10.00 SES | $35.00 | $126.00Based on Postmark's Platform plan at $18.00 plus their published $1.20 per additional 1,000. | $90.00 | Not publishedSendGrid does not print a price against a send volume. See their pricing page. | $10.00 |
| Prices verified . Each figure is the cheapest route worked out from what a provider actually publishes. Some are a quoted plan price; others are computed from a published rate for extra emails, and a note beside those says so. sendvia cost is a flat $19 plus Amazon SES at cost. | ||||||
Resend costs $35.00 a month at this volume, its flat published tier price with no working-out needed. Mailgun costs $90.00, which happens to land exactly on its own top published tier at this volume, so that figure is a list price too rather than something built up from a rate.
Postmark is the one that takes arithmetic. It sells three plans at the same entry point, and at 100,000 emails the cheapest of the three is not its entry-level plan: it is worked out from a higher plan's own published rate for every email past that plan's allowance, and the total comes to $126.00. That is a computed figure, not a number read straight off a price list, and the table above says so.
SendGrid prints no figure at all, at 100,000 emails or at any other volume. Its pricing page states entry prices for an Essentials and a Pro plan and never once says which send volume either price actually buys, so there is nothing published to compare 100,000 emails against. That absence is the honest answer for SendGrid throughout this site, not a gap in the research.
Of the four providers that publish a figure covering 100,000 emails a month, sendvia is the cheapest. The gap exists because Amazon SES prices by the email with no tier steps, so a flat platform fee on top of it matters less the more you send, while a tiered plan's own price keeps climbing in bigger jumps. That is not true at every volume: the full breakdown across six providers shows several rivals' free tiers beating sendvia's paid plan well below 100,000, and the shape of that crossover is worth reading before you assume the flat fee always wins. Each provider also has its own detailed comparison page covering what the price difference actually buys, beyond the number itself.
100,000 emails a month is well past sendvia's free plan, which tops out at 250 emails a day on 1 sending domain: anything at this volume needs the $19.00 plan. It is also past what a brand new Amazon SES account can send on day one. A fresh SES account starts inside Amazon's sandbox, capped at 200 emails a day to verified recipients, until Amazon reviews it and grants production access, which Amazon usually does within 12 to 24 hours. The SES setup guide walks through that step before any of the numbers above apply.
The API itself is built for many calls rather than one upload. A single request takes up to 50 recipients, and a batch call up to 500, so reaching 100,000 emails means driving that loop from your own code. A send can be scheduled up to 72 hours ahead, which is enough room to spread a month's sending across a few windows rather than firing it all in one burst.
The trade runs both ways, and it is worth knowing before you commit an AWS account to it. There is no dedicated IP option, no inbound email or parsing, no teams or sub-accounts and no official SDKs. sendvia also does not receive a confirmed delivery event from Amazon: it marks a message delivered once nothing negative has come back against it a couple of minutes after sending. Resend, Postmark, Mailgun and SendGrid all receive a real delivery event from their own systems, and sendvia does not.
Read what sendvia actually is before committing to it, or use the cost calculator if 100,000 is not the number you actually send.