Compare / SimploMail Inbox vs Fastmail

SimploMail Inbox vs Fastmail: Affordable Email for Your Own Domain

If you need a professional email address for your business, website, or SaaS project, Fastmail is one of the options worth considering. Fastmail offers email hosting with your own domain, along with calendars, contacts, and its own email applications. SimploMail Inbox takes a different approach. It focuses on providing affordable email addresses for your own domains, without requiring you to pay for additional productivity features.

Both services let you create professional addresses likehello@yourcompany.com. But there is a significant difference in price. Let's compare them.

The biggest difference is the price

SimploMail Inbox costs $1 per month when billed annually. That's just $12 per year for one mailbox. If you prefer monthly billing, the price is $2 per month.

Fastmail's Individual plan costs $5 per month when billed annually. That's $60 per year. Monthly billing costs $6.

Here's how the two services compare:

Fastmail includes more features and considerably more storage. But if you mainly need a professional email address for your own domain, you might not need everything included in its subscription.

Unlimited free email aliases

Both Fastmail and SimploMail Inbox support email aliases.

An email alias is an additional email address that delivers messages to an existing mailbox.

For example, suppose you have a mailbox:

hello@mybusiness.com

With SimploMail Inbox, you can create additional addresses:

• support@mybusiness.com
• sales@mybusiness.com
• billing@mybusiness.com
• contact@mybusiness.com

All these addresses can deliver incoming messages to your existing mailbox.

You don't need to pay for four additional mailboxes. And you don't need to manage four separate inboxes.

SimploMail Inbox allows unlimited free email aliases. You can create as many as you need for your domain without paying anything extra.

You can also configure an alias to deliver messages to multiple mailboxes on the same domain.

Fastmail also provides free aliases. Its official documentation states that an account can have up to 600 aliases, plus another 15 for each user.

That's a generous limit, and most businesses will never reach it.

However, SimploMail Inbox doesn't impose an alias limit.

Both Fastmail and SimploMail Inbox allow you to send and receive emails using aliases. However, SimploMail offers unlimited free aliases, so you can create as many additional email addresses as you need without paying extra.

If you mainly need multiple contact addresses that deliver to one mailbox, SimploMail Inbox provides that for just $12 per year.

What if you're building multiple SaaS projects?

If you're a developer or founder, you might have several projects running at the same time.

Each project may have its own domain name. And you probably want a professional email address for each one.

For example:

• hello@saasone.com
• hello@saastwo.com
• hello@saasthree.com

SimploMail Inbox allows you to connect multiple domains within one account.

You can create a separate mailbox for each project and add unlimited free aliases to those mailboxes.

For example, your first project might have hello@saasone.com as its main mailbox. You could also create support@saasone.com andcontact@saasone.com as free aliases.

All three addresses would deliver incoming messages to the same mailbox.

Fastmail also allows multiple domains and aliases within one account. You don't necessarily need a separate Fastmail subscription for every project.

However, if your projects require independent mailboxes with separate logins, the pricing difference becomes more noticeable.

For example, five independent mailboxes with SimploMail Inbox cost$60 per year with annual billing.

Five separate Fastmail Individual subscriptions would cost$300 per year. Fastmail also offers multi-user plans that may reduce this cost.

The important distinction is between independent mailboxes and aliases. If all your project addresses can deliver to one inbox, both providers let you use aliases instead of paying for multiple mailboxes.

Use the email application you already have

SimploMail Inbox works with popular email applications, including Apple Mail, Outlook, Thunderbird, Gmail, and other supported email clients.

You can send and receive messages using your own domain without switching to a different email application.

Fastmail also supports third-party email clients. However, it additionally provides its own webmail interface and mobile applications.

If you already have an email application you like, SimploMail Inbox lets you continue using it.

Fastmail offers more than just email

Fastmail is a more complete email hosting service.

Its Individual plan includes 50 GB of storage for email, calendars, and contacts, plus another 10 GB for files.

It also offers calendar management, contact synchronization, scheduled sending, email snoozing, and other features for managing your inbox.

SimploMail Inbox doesn't try to replace all these tools.

Its focus is much narrower: providing affordable email addresses for your own domains.

Another difference is email storage. Fastmail provides generous storage and is designed to keep messages synchronized across devices.

SimploMail Inbox has more limited storage and is designed to work with your existing email applications.

If you need a large email archive, built-in calendars, or a complete webmail application, Fastmail may be a better choice.

But if you mainly need a professional email address for your domain, SimploMail Inbox gives you a more affordable alternative.

Which one should you choose?

Fastmail makes sense if you want a complete email service with generous storage, its own applications, calendars, contacts, and advanced email management features.

SimploMail Inbox is a good option if your needs are simpler and you're looking for a more affordable solution.

Maybe you're launching a SaaS product, building a website, or running several small projects.

You want professional email addresses for your domains, but you don't need another productivity platform.

With SimploMail Inbox, you get a mailbox using your own domain for$12 per year, with unlimited free aliases.

That's 80% less than Fastmail's $60 annual Individual plan.

And you can continue using the email application you already know.

Prices are in US dollars and reflect the providers' published pricing on November 3, 2026. Monthly equivalents shown for annual plans require annual billing.

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