JustEmails API vs MailPace: Transactional Email Compared (2026)
MailPace vs JustEmails API: where they overlap and differ.
By JustEmails Platform Team
Three weeks ago I watched a founder in a Slack group spend an entire afternoon debugging why his password reset emails weren't arriving. SendGrid account. 50,000-email monthly plan. Eighteen different suppression settings. Three dashboard tabs open, none of them showing the same delivery stats.
The email was bouncing because of a misconfigured suppression group he'd set up two years prior and forgotten about.
This is the tax you pay for "enterprise" transactional email. Features you don't use. Dashboards you don't understand. Pricing that assumes you're sending millions when you're sending thousands.
MailPace and JustEmails both exist because of this gap — and honestly, I'm surprised more tools haven't jumped in. They're built for developers and small teams who need transactional email to just work. No SendGrid maze. No Twilio acquisition bloat. No account managers asking about your "email program strategy."
But they solve the problem differently. Here's where they overlap. Here's where they don't.
Quick Verdict
TL;DR: MailPace is a focused transactional-only API with per-email pricing, EU hosting, and published speed benchmarks. JustEmails bundles transactional API with full email hosting at a flat $49/year — you get mailboxes, IMAP, webmail, and 1,000 API emails/month included. If you just need an API endpoint for password resets, MailPace is lean and fast. If you're also managing business email across multiple domains, JustEmails replaces two services with one.
Pick MailPace if transactional is your only need and EU data residency matters. Pick JustEmails if you want hosting and API in one bill.
Feature-by-Feature Comparison
| Feature | MailPace | JustEmails |
|---|---|---|
| Transactional API | Yes | Yes |
| SMTP endpoint | Yes | Yes |
| Mailbox hosting | No | Yes (unlimited) |
| IMAP/POP3 access | No | Yes |
| Webmail | No | Yes |
| Inbound email handling | Webhooks only | Full mailboxes + API webhooks |
| Included API volume | 100/mo (free), 10K/mo ($10) | 1,000/mo included free |
| Additional volume pricing | ~$10/mo per 10K (calculator-based) | $25/year per 10K tier |
| Domains | Unlimited | Unlimited |
| Team members | Unlimited | $2/member/month (owner free) |
| DKIM/SPF/DMARC | Auto-configured | Auto-configured |
| EU data residency | Yes (explicit) | No (not currently marketed) |
| Published speed benchmarks | Yes (1.19s average) | No |
| Tracking pixels | No (privacy-first) | No |
| Storage | N/A (no mailboxes) | 10 GB included |
The table tells the core story: MailPace is API-only. JustEmails bundles API with hosting.
How MailPace Works
MailPace does one thing: transactional email. Send a POST request to their API (or relay through their SMTP endpoint), and they deliver password resets, order confirmations, OTP codes, whatever.
No mailboxes. No receiving email (except via inbound webhooks that convert to JSON). No webmail interface. No contact forms. They're not trying to be your email host — they're trying to be the last step between your app and Gmail's inbox.
Their positioning is explicit about this. They reject marketing email entirely. Transactional only. The theory: keeping spam-adjacent use cases off their infrastructure protects deliverability for everyone.
The pricing reflects the focus. Pay-as-you-go starting at $10/month for 10,000 emails. No per-seat costs, no per-domain costs, no feature tiers. Volume is the only variable. They have a hidden free tier — 100 emails/month — but you have to email support to activate it. (Not sure why it's hidden. Maybe to filter out tire-kickers?)
For developers who want a simple API endpoint and nothing else, it's hard to argue with the approach. You're not paying for features you don't use.
(I wish more SaaS products had this discipline, frankly. Most add three features every quarter until the thing collapses under its own weight.)
How JustEmails Works
JustEmails takes the opposite approach: bundle everything.
The core product is email hosting — unlimited domains, unlimited mailboxes, IMAP/SMTP access, webmail, auto-configured DNS records. Flat $49/year pricing. No per-user pricing, no per-domain pricing. Add your domains, create your mailboxes, done.
The transactional API is bundled on top. You get 1,000 API emails/month included in that $49/year. If you need more, add $25/year per 10,000-email tier. The API supports REST calls with idempotency keys, webhook delivery notifications, and message logs. Standard stuff.
The idea is that most small teams need both. You need info@yourdomain.com for receiving inquiries. You need noreply@yourdomain.com for password resets. Instead of paying MailPace for transactional and paying Google Workspace for mailboxes, you pay one service.
For developers already hosting email elsewhere (Google Workspace, Zoho, Fastmail), this might be overkill — you'd be paying for hosting you don't need. For anyone running multiple domains who's sick of per-user pricing, the bundling makes sense. I've talked to agency owners paying $400/month just for email across client domains. That math breaks people. We break down the true cost of Google Workspace for teams if you want the full picture.
Deep Dive: Pricing Math
Let's get specific. Numbers make decisions easier.
Scenario 1: 5,000 transactional emails/month, no mailbox hosting needed
- MailPace: $10/month → $120/year
- JustEmails: $49/year (includes 1K/mo, plus one $25/year tier for 10K/mo) → $74/year total
JustEmails is cheaper here, but you're paying for mailbox hosting you don't use. MailPace pricing scales tighter to actual usage.
Scenario 2: 5,000 transactional emails/month + 3 domains with business mailboxes
- MailPace: $10/month ($120/year) + Google Workspace at $84+/user/year × 3 users → $372/year minimum
- JustEmails: $49/year (includes 1K/mo, plus one $25/year tier for 10K/mo) → $74/year total
Now the bundling pays off. JustEmails handles both workloads for less than MailPace plus a separate host.
Scenario 3: 100,000+ transactional emails/month, enterprise-scale
- MailPace: Custom pricing via calculator (dedicated IP available)
- JustEmails: Stack $25/year tiers — 100K/mo would be 10 tiers at $25 → $250/year plus base $49 → $299/year
At high volume, MailPace's calculator-based pricing might be competitive. JustEmails' tier stacking is transparent but not designed for massive scale — we're not pretending to compete with Amazon SES at 10 million emails/month.
The break-even point depends on whether you need hosting. If you're API-only and volume scales past 50K/month, compare MailPace's calculator against JustEmails' tier stacking. If you're consolidating hosting and API, JustEmails wins outright.
Deep Dive: Speed Claims
MailPace publishes live delivery benchmarks. As of mid-2026:
- Average delivery: 1.19 seconds
- Gmail: 0.84 seconds
- iCloud: 1.03 seconds
- Yahoo: 1.28 seconds
They track this openly and optimize against it. If you're building something where "password reset arrived in 0.8 seconds" is a differentiator, that's meaningful.
JustEmails doesn't publish comparable benchmarks. No live stats page. No average-delivery-time marketing.
Honest take: for most transactional use cases, both are fast enough. Your users don't time their password resets with a stopwatch. (If they do, you have bigger problems.) But if you're in a compliance environment where you need to document SLAs, MailPace gives you something concrete. JustEmails doesn't — yet. That's a gap we need to close.
Deep Dive: Privacy and Data Residency
MailPace markets itself as privacy-first:
- EU-hosted infrastructure (carbon-neutral, too)
- No tracking pixels
- No click monitoring
- Independent company (not owned by Twilio or Salesforce)
If you're building for EU customers and GDPR data residency matters legally — not just ethically — MailPace's explicit positioning reduces risk. You can point to "EU-hosted transactional email" in your privacy policy without hedging.
JustEmails uses TLS 1.2+ encryption in transit and at rest, but doesn't currently market EU-specific hosting or carbon-neutral infrastructure. For teams where EU residency is a hard requirement, that's a gap. If you're setting up DMARC anyway, our guide on implementing DMARC p=reject safely covers what you need.
For teams where EU residency is nice-to-have but not legally mandated, both work. Neither sells your data. Neither tracks opens unless you configure it.
Who Should Pick What
Pick MailPace if:
- Transactional email is your only need — no mailboxes, no receiving
- EU data residency is a legal requirement for your project
- You want published speed benchmarks you can cite
- You prefer pure pay-as-you-go over annual bundles
- You're already hosting email elsewhere and don't want to migrate
Pick JustEmails if:
- You need mailboxes and transactional API in one service
- You're managing email across multiple domains (agencies, SaaS founders, freelancers)
- You're consolidating away from per-user pricing (Google Workspace, Zoho)
- Annual flat pricing is easier to budget than pay-as-you-go
- You want to run everything — business email, aliases, catch-alls, API sends — from one dashboard
Pick both if:
- You're already on JustEmails for hosting but want MailPace's EU residency for GDPR-specific transactional sends. (Weird edge case, but I've seen it.)
The Bundling Tradeoff
Here's the honest tension: MailPace does one thing well. JustEmails does two things in one place.
If you're the kind of developer who prefers single-purpose tools, MailPace's focus is appealing. No hosting cruft. No webmail interface you'll never open. Just an API endpoint.
If you're the kind of operator who's tired of managing six different email services across six different dashboards, JustEmails' bundling makes sense. I'm in this camp. I've burned enough weekends debugging SPF records that reference four different providers — never again. We wrote a guide on consolidating email providers onto one domain host if that sounds familiar.
Neither is wrong. It's a preference.
Final Verdict
MailPace is focused, fast, and privacy-forward. For transactional-only use cases where EU hosting matters, it's hard to beat. Pay-as-you-go that actually tracks usage. Published speed benchmarks you can point to in contracts.
JustEmails is broader. If you're tired of paying Google Workspace $84+/user/year for mailboxes PLUS Postmark $1.25/1K for transactional sends PLUS whatever else, consolidation into one $49/year service with built-in API makes the math work. Check out our JustEmails vs Google Workspace cost comparison if you're running the numbers on a migration.
For most indie devs building a single product with light transactional needs, either works. For agencies and founders managing multiple domains who also need business email, JustEmails' bundling tilts the decision.
I'm biased — I work on JustEmails. But I'd use MailPace for a GDPR-heavy EU project where data residency was contractual. I've recommended it to people before. Sometimes bundling isn't what you need.
Frequently Asked Questions
Does MailPace offer a free tier?
MailPace has a hidden free plan with up to 100 emails per month. You need to contact their support team directly to activate it — it's not self-serve. For testing or very light use, it works. For anything production-grade, you're looking at their paid tiers starting around $10/month for 10,000 emails.
Can JustEmails replace both my email hosting and transactional API?
Yes. JustEmails bundles mailbox hosting (unlimited domains, unlimited mailboxes, IMAP/SMTP access) with a transactional email API (1,000 emails/month included, $25/year per additional 10K tier). MailPace is API-only — no mailboxes, no receiving, no webmail. If you're currently paying for both hosting and transactional separately, JustEmails consolidates them.
Which is faster — MailPace or JustEmails API?
MailPace publishes delivery speed benchmarks (claiming 1.19 seconds average delivery, with Gmail under 1 second). JustEmails doesn't publish comparable live benchmarks. If sub-second delivery confirmation is a contractual requirement, MailPace's public metrics give you something to point to. For most transactional use cases, both deliver fast enough that users won't notice the difference.
Is MailPace GDPR compliant?
Yes. MailPace hosts infrastructure in the EU and markets itself as privacy-first with no tracking pixels. JustEmails also uses TLS 1.2+ encryption in transit and at rest, but doesn't currently market EU-specific hosting. If EU data residency is a legal requirement for your project, MailPace's explicit positioning here matters.
Try JustEmails
Unlimited custom domain email hosting for $49/year flat — unlimited domains, unlimited mailboxes, 10 GB storage, full IMAP/SMTP. Built for agencies, freelancers, and anyone managing email across more than one domain.