Pricing · Updated June 2026

Transactional Email API Pricing

Two dimensions: contacts in your account, sends per month. Free tier covers most small transactional workloads completely. Paid plans add headroom plus the DPA, multi-brand isolation and domain warming. No per-developer pricing.

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Quick Answer

NexusProMail prices the transactional email API on two dimensions: contacts in your account and sends per month. Free tier covers 250 contacts and 1,000 sends. Standard starts at €12/month, Premium at €35/month, Enterprise on quote with dedicated IP. The pre-signed Article 28 DPA is included on every paid plan at no extra cost. Annual billing is 17% cheaper than monthly. Sandbox API key issued immediately on signup with no credit card.

Key Takeaways

  • Free tier is permanent — no automatic conversion to paid
  • Per-send pricing models penalise small contact lists; ours bundles generous send headroom
  • DPA is bundled — no separate negotiation fee or annual review charge
  • Cross-tier movement only happens when you exceed BOTH contact AND send limits
  • For 50k–500k sends/month, Standard or Premium is meaningfully cheaper than SendGrid Pro

Plans at a Glance

Monthly prices shown. Annual billing knocks 17% off. EUR; GBP and USD available at signup.

Free
€0forever
  • ✓250 contacts
  • ✓1,000 sends/month
  • ✓Sandbox API key on signup
  • ✓Webhooks + suppression
  • ✓Full template editor
  • ✓Community support
Standard
from €12/ month
  • ✓500–10,000 contacts (tiered)
  • ✓5× send multiplier on contacts
  • ✓Campaign builder
  • ✓Domain warming
  • ✓Suppression + signed unsubscribe
  • ✓Email support
Most popular
Premium
from €35/ month
  • ✓10,000–100,000 contacts (tiered)
  • ✓API + webhooks
  • ✓Multi-brand isolation
  • ✓Pre-signed DPA included
  • ✓Domain warming engine
  • ✓Priority email support
Enterprise
Quote
  • ✓100k+ contacts
  • ✓Dedicated IP option
  • ✓Custom EU data residency
  • ✓SLA with 99.95% uptime
  • ✓Bank-transfer billing
  • ✓Dedicated success manager

Worked Examples

Concrete scenarios with the plan that fits. Numbers are illustrative; actual usage varies by application.

Solo developer SaaS — magic links + receipts

~80 sends per day, ~500 active user accounts. Just transactional, no marketing.

Recommended plan: FreeCost: €0

Free tier covers this completely. ~2,400 sends/month is over the 1,000 ceiling — bump to Standard (€12) at the next ceiling event.

Series-A startup — onboarding + product updates

~5,000 contacts, 25,000 marketing sends + 8,000 transactional/month.

Recommended plan: StandardCost: €12–€35

Standard with 10k contact tier fits. Move to Premium if you need multi-brand isolation, the DPA workflow or domain warming for a fresh sending domain.

Mid-market SaaS — multi-tenant + transactional

~40,000 contacts, 250,000 sends/month, multi-brand (3 product lines).

Recommended plan: PremiumCost: ~€100/mo annualised

Premium 50k tier with multi-brand. DPA pre-signed. Domain warming for the API subdomain. SLA via standard support.

Agency / dealer — reselling under own brand

~80 client sub-accounts, mixed transactional and marketing.

Recommended plan: Dealer (contact sales)Cost: Custom

Dealer pricing is volume-based with commission tracking. Sub-account isolation enforced at the contact and suppression level. Dealer onboarding includes a white-label domain configuration.

Enterprise — dedicated IP + EU-only residency

500k+ contacts, 3M sends/month, audit-trail requirement.

Recommended plan: Enterprise (quote)Cost: Quote

Dedicated IP with warm-up. Custom data residency options. Bank-transfer billing. Annual contract. DPIA-ready documentation package.

Per-Send vs Per-Contact: Which Costs Less for You

The transactional email industry uses two pricing models: per-send and per-contact. They reward different usage patterns.

Per-send pricing (SendGrid Essentials, Mailgun Foundation)

You pay per email sent, with overage rates as you scale. Good for senders with very small contact lists and bursty transactional traffic (e.g. e-commerce order confirmations). Bad for marketing-heavy senders with large lists that send infrequently — you end up paying for the same contact many times.

Per-contact pricing (NexusProMail, MailerLite, Brevo)

You pay for the size of your contact list with a generous send multiplier included. Good for SaaS with stable user bases sending magic links, receipts, alerts and onboarding flows. Good for marketing senders where reach matters more than volume. The send-multiplier means most senders never hit the send ceiling before the contact ceiling.

As a heuristic: if your “sends ÷ contacts” ratio is below 10 per month, per-contact pricing wins. Above 30, per-send pricing wins. Between 10 and 30, run a cost simulation for both — most teams find the difference is smaller than they expect.

Pricing FAQ

How is API pricing structured?+
Two dimensions: the number of contacts in your account and the number of sends per month. Plans bundle a fixed contact ceiling and a fixed send ceiling — exceed either and you move to the next tier (or pay an overage). For pure transactional senders with small contact lists, this is usually cheaper than per-send pricing because most plans bundle generous send headroom. For marketing-heavy senders, the contact tier dominates.
What's actually free?+
250 contacts + 1,000 sends per month, forever. Sandbox API key issued on signup. Real sends to verified addresses. Full API surface including webhooks, suppression and templates. No credit card required to start. The free tier is designed to evaluate the platform end-to-end — most teams know within a week whether it fits.
Is there a sandbox mode?+
Yes. The sandbox API key is issued immediately on signup and works against the production API. The sandbox sends real emails to verified addresses (you nominate a list during signup) without consuming production reputation. When you're ready to ship, rotate the key to production and add DNS authentication for your sending domain.
How does pricing compare to SendGrid, Mailgun and Resend?+
For up to ~100,000 contacts and ~3M sends/month, NexusProMail Standard/Premium (€12–€35/month) is meaningfully cheaper than SendGrid Pro and roughly on par with Mailgun Foundation. Resend's pure-transactional free tier (3,000/month) is more generous than ours. Above 1M sends/month with dedicated IP requirements, all four converge to enterprise-quote territory and direct comparison gets noisier. The cleaner buying decision tends to be operator jurisdiction (NexusProMail = EU) rather than pure rate cards.
Do I pay extra for the DPA?+
No. The pre-signed Article 28 DPA is included with every paid plan and available on request to email support during the free tier. We do not charge for DPA negotiation, sub-processor disclosure or jurisdiction-clause customisation within the standard scope.
What about dedicated IP?+
Dedicated IP is an Enterprise-plan capability priced per-IP per month. Mid-tier plans use a shared IP pool with NexusProMail-managed reputation. For most senders below 500k sends/month, shared IPs deliver as well as or better than a single dedicated IP because the warm-up curve is amortised. The honest answer is that you usually don't need dedicated IP until you have measurable reputation problems caused by shared-pool noise.
How does volume scaling work?+
Each plan has a contact ceiling and a send ceiling. When you cross either, you move to the next tier at next renewal — or buy an overage allowance immediately. We notify at 80% and 95% usage so you can plan. There are no surprise overage charges; you have to confirm before any extra capacity is billed.
Is there an annual discount?+
Yes — 17% off versus monthly. You're billed once for the year upfront. Pro-rated refunds available for cancellations within the first 90 days. Annual billing on the Premium plan, including the DPA and multi-brand isolation, is the configuration most procurement teams ask for.
What happens at the end of the free tier?+
Nothing automatic. The free tier doesn't expire — it's a permanent plan. You only move off when you cross the contact or send ceiling. At that point you choose Standard, Premium or Enterprise. Until then you can stay on Free indefinitely; we keep your data, templates and suppression list intact.
Can I migrate from SendGrid / Mailgun / Resend during the free tier?+
Yes. Most teams use the free tier to run NexusProMail in parallel with their existing provider, validating templates, suppression import and webhook behaviour before cutover. The free tier's 1,000 sends/month is enough to validate the integration without DNS changes. When you're satisfied, you flip the application config and add SPF/DKIM/DMARC for the sending subdomain.

Start with the free tier

250 contacts and 1,000 sends per month with sandbox API key — no credit card. Most teams know within a week whether NexusProMail fits.

Start free →

Also read: EU email API · Transactional email API · Full marketing pricing · Data Processing Agreement · SendGrid alternative