Postmark is the deliverability purist's choice and its support is genuinely excellent. But every plan includes only 10,000 emails, and overages of $1.20–$1.80 per 1,000 make volume expensive fast — 100,000 emails costs $126 a month even on Postmark's cheapest published route.
Every Postmark plan includes 10,000 emails — Basic at $15, Pro at $16.50, Platform at $18 — with everything above that billed as an automatic overage at $1.80, $1.30 and $1.20 per 1,000 respectively. So 100,000 emails costs $126 on Platform ($18 + 90 x $1.20), $133.50 on Pro, or $177 on Basic. Bluey's transactional Essentials tier is $14.95 for the same 100,000. Postmark's advantages are real — a long-standing deliverability reputation, 45-day to 365-day message retention, and inbound processing on Pro — but if your volume is growing, the overage model is what will eventually move you. Pick Postmark for low-volume, high-stakes transactional mail where retention and support matter more than unit cost; pick Bluey when volume is the variable.
Postmark's base plans look cheap because they cover very little volume — 10,000 emails on every tier. At $1.20 per 1,000 on Platform, the 90,000 emails past that allowance cost $108 against an $18 base. The plan is not the price; the overage is.
Postmark does transactional exceptionally well and does not attempt marketing automation, a CRM or landing pages. That is a defensible focus, but it means a second subscription for the other half of your email.
Bluey's transactional plans are tiered rather than metered: you know the number before the month starts. A base-plus-usage model means the invoice depends on how the month went.
Postmark is not expensive by accident — the price buys things that are genuinely hard to replicate.
If you send under about 20,000 emails a month and every one of them matters, Postmark is defensible at any price. Above that, the overage rate is doing most of the work on your invoice.
Postmark to Bluey is a same-shape migration: both are modern REST-plus-SMTP providers with template APIs and suppression handling.
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Start free and get the checklistSubstantially, once you are past the included volume. Every Postmark plan includes 10,000 emails, so 100,000 costs $126 on Platform, $133.50 on Pro or $177 on Basic — the arithmetic is their own published base plus their own published overage rate. The same volume is $14.95 on Bluey Essentials. Below about 10,000 emails a month the two are close, and Postmark's free tier of 100 emails is not comparable to a trial.
Postmark has a longer public track record and enforces a strict transactional-only policy that keeps its shared pools unusually clean — that is a real advantage and we are not going to claim otherwise. Bluey authenticates properly, monitors complaint rates against Gmail's 0.3% threshold and manages suppression automatically. For most senders the difference in outcome is smaller than the difference their own list hygiene makes.
Three days of searchable activity on Essentials and seven on Pro. This is genuinely less than Postmark's 45 days, extendable to 365. If you rely on long retention for debugging or compliance, that is a real reason to stay.
It has a broadcast message stream for bulk sending, but no automation builder, no CRM, no landing pages and no segmentation engine. It is deliberately a transactional product. Running marketing alongside it means a second platform.
Yes, and you should. Keep Postmark handling live traffic while you send a growing share through Bluey, compare delivery and bounce rates on your own data, then move DNS fully once the numbers match. A few days of overlap costs very little and removes the risk.
Pricing verified 4 September 2026 against each provider’s public pricing page. Bluey figures use the Grow plan (send-based). Competitor tiers shift at least quarterly; figures marked “~” are interpolated between published tiers.
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