MailAfiniti vs Fastmail: Same Email, 66% Less Cost

TL;DR: Fastmail is the best webmail interface on the market, but its custom domain feature only unlocks on the $6/user/month Standard plan. MailAfiniti includes custom domains, SPF/DKIM/DMARC records generated for you, and free migration from $1.50/user/month — a 66% cheaper Fastmail alternative for teams that live in Outlook or Apple Mail.

Why Businesses Choose MailAfiniti Over Fastmail

Fastmail is built for people who love email. Fast search, keyboard shortcuts, custom rules, and a clean web interface. It's what email nerds recommend.

MailAfiniti is built for busy business owners who just want professional email that works. Set it up in minutes and get back to running your business.

Both do the job. The question is whether you need a premium email app — or a reliable business tool at a fraction of the price.

Side-by-Side Comparison

Pricing Breakdown

Fastmail Business Pricing

• Basic: $4/user/month ($3/month annual), 6 GB storage — no custom domain
• Standard: $6/user/month ($5/month annual), 60 GB storage — cheapest tier with custom domain
• Professional: $10/user/month ($9/month annual), 150 GB storage

(Fastmail pricing as of June 2026; longer 24- and 36-month terms drop Standard to $4.75–$4.67/user. Check fastmail.com/pricing for the latest.)

MailAfiniti Pricing

• Starter: $2/mailbox/month (or $1.50 annual), 10 GB
• Professional: $3/mailbox/month, 30 GB
• Enterprise: $5/mailbox/month, 50 GB

The Key Difference: Fastmail Custom Domain Cost Starts at $6/month

To use a custom domain on Fastmail, which is the whole point of business email, you need their $6/month plan. MailAfiniti includes custom domains on every plan starting at $2. That is the core fastmail custom domain cost problem most small teams hit.

For a 10-person team:

• Fastmail Standard: $60/month ($720/year)
• MailAfiniti Professional: $30/month ($360/year), or $22.50/month annual ($270/year)

You save $360 to $450 per year.

Even Fastmail's Deepest Discount Doesn't Beat MailAfiniti's Monthly Price

Fastmail lowers its per-user rate as you commit to longer terms, but you have to lock in to get there. Here's how Fastmail's term discounts stack up against MailAfiniti's no-commitment monthly Starter plan:

Read the top two rows together. Fastmail's cheapest possible price, Basic locked in for three years, is still $2.80/user/month, more than MailAfiniti's $2 monthly Starter with no commitment at all. And MailAfiniti gives you 10 GB versus Basic's 6 GB, plus the one thing Basic can't do at any term length: host email on your own domain. To get a custom domain on Fastmail you have to step up to Standard, where even the deepest 36-month discount lands at $4.67, still more than double MailAfiniti's monthly rate.

3-Year Total Cost of Ownership (10-person team)

Over three years, a 10-person team saves between $990 and $1,350 by choosing MailAfiniti, before counting the saved hours on DNS setup and migration.

When to Pick Fastmail vs MailAfiniti

Pick Fastmail if:

• Your team lives in webmail all day and interface quality is a real productivity lever
• Privacy and aliasing matter — masked emails and JMAP support are genuinely best-in-class
• You're comfortable editing DNS records yourself and don't need migration help
• $6/user/month fits the budget without friction

Pick MailAfiniti if:

• Your team uses Outlook, Apple Mail, or a phone mail app (so webmail polish is invisible)
• You want custom domain email without unlocking a premium tier to get it
• You'd rather we generate your SPF, DKIM, and DMARC records and guide you through them than read a DNS guide
• You want a real person to answer when something breaks
• Budget per mailbox is closer to $2–3 than $6–7

Fastmail's webmail is the best in the category. We don't pretend otherwise. The question is whether you'll see it — or whether you'll spend the day in Outlook while paying for an interface you never open.

How to Migrate from Fastmail to MailAfiniti

Switching is straightforward because Fastmail uses standard IMAP. The high-level steps:

1. Sign up for MailAfiniti and add your domain (we generate your DNS records and guide you through adding them).
2. Send us your Fastmail IMAP credentials (or an app password).
3. We copy all mailboxes, folders, and historical email in the background — no downtime.
4. Update MX records when ready; mail flow cuts over in minutes.
5. Reconfigure mail clients to MailAfiniti's IMAP/SMTP endpoints.

Most 10–25 person teams finish the migration in under a week. For the full process, see our email migration guide.

Fastmail for Business Email: What You're Actually Paying For

Fastmail's Standard plan at $6/month is built around the webmail experience. The interface is fast, polished, and genuinely better than most competitors. If email is your primary work tool and you spend hours in your inbox, that quality is real and noticeable.

But here's the practical reality for most small businesses: they access email through Outlook, Apple Mail, or their phone's default mail app. They use IMAP. The webmail interface is irrelevant to them.

In that case, Fastmail's premium is being paid for a product that never gets used. The email itself (delivery, storage, spam filtering, custom domain) is handled identically via IMAP by both providers.

MailAfiniti targets exactly this gap. Professional email, custom domain, SPF/DKIM/DMARC records generated for you, human support, free migration — from $1.50/mo. No premium webmail tax.

Frequently Asked Questions

Is Fastmail worth the price?

If you live in webmail and value a polished interface, masked aliases, and strong privacy posture — yes, Fastmail is worth its premium. If you use Outlook or Apple Mail and just need professional email on your domain, you're paying for features you never touch.

What is the cheapest Fastmail alternative for custom domain email?

MailAfiniti is one of the cheapest direct alternatives, starting at $1.50/user/month on annual billing with custom domain included. Compared to Fastmail's $6/month Standard plan (the cheapest tier with custom domain support), that's roughly a 66% reduction.

Does MailAfiniti have privacy features like Fastmail?

MailAfiniti is ad-free, does not scan email content, and uses TLS encryption in transit — matching Fastmail on the fundamentals. Fastmail still leads on power-user privacy features like unlimited masked email aliases and JMAP. For most business buyers, the privacy posture is comparable.

Can I migrate from Fastmail to MailAfiniti without losing email?

Yes. Because Fastmail supports standard IMAP, we copy every folder and message into MailAfiniti before you cut over MX records. Zero downtime, no lost mail. Migration is free on Professional and Enterprise plans.

Is Fastmail good for business email?

Fastmail is a strong choice for solo founders and technical teams who want a premium webmail experience and don't mind DNS work. It's less suited to non-technical small businesses that need hand-holding on setup, migration, and support, where MailAfiniti is a better fit.

Fastmail vs MailAfiniti for custom domain — which is simpler?

MailAfiniti is simpler. Custom domain works on every plan from $2, and we generate the SPF, DKIM, and DMARC records for you with guided setup. Fastmail requires the $6 Standard plan for custom domains, and unless you also host DNS at Fastmail you add the records manually (DMARC is manual either way).

The Bottom Line

Fastmail is a premium product with a premium price. If you live in webmail and want the best email interface, it's worth $6–10/month.

But most businesses use Outlook or Apple Mail — not webmail. For them, Fastmail's interface goes unseen. They're paying 3–4x more for the same result: professional email on their domain. MailAfiniti gets you there from $1.50/mo with less setup hassle and free migration.

Start your free 14-day trial — no credit card required

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Related reading

• Business Email Hosting for Small Business — the hub guide
• Cheap Business Email Hosting — budget-tier comparison
• Email Migration Guide — how to switch providers without losing mail
• Why Custom Domain Email Matters — the case for ditching @gmail
• MailAfiniti vs Zoho Mail — nearest on price
• MailAfiniti vs Google Workspace — the most common switch
• MailAfiniti vs ProtonMail — the other privacy-focused option compared