Transactional email providers quote monthly plan prices, which makes them almost impossible to compare. A $15 plan and a $30 plan tell you nothing until you know how many emails each includes.
The metric that matters is cost per thousand emails sent. Here is what that looks like across the volume ladder, and where the pricing model changes shape.
Bluey Email API pricing, by volume
Two tiers. Essentials covers SMTP and REST sending up to 300,000 emails a month. Pro starts at 50,000 and runs to 2.5 million, adding subuser management, unlimited API keys and longer log retention.
| Monthly volume | Essentials | Per 1,000 | Pro | Per 1,000 |
|---|---|---|---|---|
| 15,000 | $4.00 | $0.267 | — | — |
| 50,000 | $9.95 | $0.199 | $29.95 | $0.599 |
| 100,000 | $14.95 | $0.150 | $49.95 | $0.500 |
| 300,000 | $29.95 | $0.100 | $89.95 | $0.300 |
| 700,000 | — | — | $149.95 | $0.214 |
| 1,500,000 | — | — | $249.95 | $0.167 |
| 2,500,000 | — | — | $349.95 | $0.140 |
How to read that table
Essentials gets cheaper per email as you scale — sharply. From $0.267 per thousand at 15K down to $0.100 at 300K. That is a 62% reduction in unit cost within a single tier.
Pro is priced for features, not volume, below 300K. At 300,000 emails Essentials costs $29.95 and Pro costs $89.95 — three times the price for identical sending volume. You are paying for subuser management, unlimited API keys and seven days of searchable activity, not throughput.
The crossover is exact: Essentials at 300K costs the same as Pro at 50K — both $29.95. Choosing between them below 300K is purely a question of whether you need the Pro features, because the sending is identical.
Above 300,000 the choice disappears. Essentials stops. Pro is the only option, and its unit economics keep improving to $0.140 per thousand at 2.5M.
Which tier do you actually need?
Essentials is enough if you send receipts, OTPs, password resets and notifications from a single application, under 300,000 a month, with one team on the account. It includes SMTP and REST, SPF/DKIM domain authentication, suppression management, full analytics, 2 event webhooks, 5 API keys and 3 days of searchable activity.
Pro earns its price if you need subuser management — separate sub-accounts per product, client or environment, which is the main reason agencies and multi-product companies upgrade — or you need more than 5 API keys, more than 2 event webhooks, or logs going back further than 3 days.
The log retention difference deserves attention. Three days versus seven sounds minor until you are debugging a delivery complaint raised on Friday about an email sent the previous Monday. If your support process involves looking up individual sends after the fact, seven days is the practical minimum.
What to normalise before comparing anyone else
Transactional pricing pages are hard to compare, often deliberately. Four things to fix before drawing conclusions:
- Convert everything to cost per thousand. Plan prices are meaningless without their included volume. Do the division for every provider on your shortlist.
- Find the overage rate, not just the plan price. What happens in the month you exceed your allowance matters more than the base price. Some bill automatically at a published rate, some pause sending, some force an upgrade. This is where surprise invoices come from.
- Check whether a dedicated IP is included, extra, or required. At higher volumes some providers require one and charge separately, which can change the real monthly cost substantially.
- Check log retention and webhook limits. These get quietly cut on cheaper tiers, and they are exactly what you need when something breaks.
For the wider field, see the best email APIs for developers and the best transactional email services.
Marketing and transactional on one bill
Most stacks pay two vendors: a marketing platform and a transactional provider. Two subscriptions, two dashboards, and — more importantly — two sending reputations to manage.
Bluey Email includes transactional API and SMTP sending on every marketing plan, as well as selling the API standalone. Whether that matters depends on your setup:
- Running both from one account is simpler and cheaper, and suits most small and mid-sized senders.
- Keeping them separate is deliberate practice at scale, so a bad marketing campaign cannot damage the reputation delivering your password resets. Serious senders often use separate subdomains or IP pools for exactly this reason.
Neither is wrong. The mistake is paying two vendors without having made the choice on purpose. Background in transactional vs marketing email and SMTP vs email API.
Frequently asked questions
How is transactional email priced?
Almost always by monthly send volume, in tiers. The useful comparison is cost per thousand emails, which means dividing the plan price by the included volume — a step most pricing pages avoid making easy.
What is the difference between Essentials and Pro?
Essentials covers sending up to 300,000 a month with 2 webhooks, 5 API keys and 3 days of log retention. Pro adds subuser management, unlimited API keys, 5 webhooks, 7 days of retention and volumes to 2.5 million. Below 300K the sending capability is identical — you are buying features.
Do I need a dedicated IP?
Usually not below a few hundred thousand emails a month. A dedicated IP only helps if you send consistently enough to maintain its reputation — sending intermittently from one is worse than sharing a well-managed pool. See how to warm up an email domain.
Can I use one provider for both marketing and transactional?
Yes, and it is simpler. At scale some senders deliberately separate them to isolate sending reputation so a marketing problem cannot delay a password reset.
What happens if I exceed my plan volume?
Check this before buying, for any provider. Policies vary between automatic overage billing, paused sending and forced upgrades — and it is the most common cause of an unexpected invoice.
Start sending. The Bluey Email API covers SMTP and REST from $4 a month, with SPF/DKIM authentication, suppression management and full analytics on both tiers. See current pricing — an INR toggle is available alongside USD.
Pricing verified from the Bluey Email pricing page, September 2026. Figures change — check the live page before relying on any number.
What SendGrid actually costs, including overage: SendGrid pricing explained.