Mailstrom pricing, free trial and refunds

Mailstrom has three paid plans: Basic at $9 a month or $59.95 a year, Plus at $14 a month or $99.95 a year, and Pro at $29.95 a month or $199.95 a year. There is no free plan, only a free trial with no card, which lets you delete, archive or move 25% of the messages in a one-time snapshot of your inbox.

Mailstrom is a web tool from 410 Labs that groups your mail by sender, subject, date and size, so you can clear thousands of messages at once. This page covers what each plan buys, what the trial leaves out, and what happens to your money when you cancel. Prices as of November 2026, from Mailstrom's pricing page, FAQ and terms.

Mailstrom plans and prices

Plan	Monthly	Yearly	Email accounts	Mailbox size	Smart filters
Basic	$9	$59.95	1	Up to 10,000 emails	200
Plus	$14	$99.95	3	Up to 250,000 emails	400
Pro	$29.95	$199.95	20	Unlimited	1,000

Every plan includes "Unlimited email removal" and "Chill, Expire & Block" (pricing). The plans differ only in how many accounts you connect, how much mail they take, and how many smart filters you keep. Prices are in US dollars, plus "any applicable tax." For group or enterprise pricing, Mailstrom asks you to write to sales@mailstrom.co.

Is Mailstrom free?

No. Mailstrom has a free trial, and after it you have to subscribe. The FAQ explains the trial:

• It's a snapshot. "When you sign up, we take a snapshot of the messages in your inbox." If you have more than 5,000 messages, "we only load the latest 5,000."
• You can act on a quarter of it. "You can use Mailstrom to delete, archive or move 25% of your messages. To act on more messages, you will need to subscribe."
• No card. The trial "does not require a credit card and entails no obligation on your part."
• No ongoing tools. Block, Chill, Expire and saved rules are for subscribers only, "since the free trial is a snapshot of your inbox that is not continuously loaded."

The pricing page doesn't say how many days the trial lasts.

So with 40,000 messages in your inbox, the trial loads the newest 5,000, and you can clear about 1,250 of them before you pay.

Which Mailstrom plan do you need?

Pick by your largest inbox and how many accounts you clean. Basic takes one account "Up to 10,000 emails." If your inbox is bigger, or you have a work and a personal address, you're on Plus, which takes three accounts and up to 250,000 emails. Pro is for 20 accounts or a mailbox with no size cap.

Mailstrom works over IMAP. It connects Gmail, Outlook and Yahoo with OAuth2, so it doesn't get your password, and it takes iCloud with an app-specific password (FAQ). It can't connect a POP account, or an Exchange server without IMAP turned on. The FAQ also says it can't yet organize folders other than the Inbox.

Is the yearly plan worth it?

Yes, if you'll keep using Mailstrom for most of a year. Twelve months of Basic at $9 is $108, against $59.95 for the year. Plus is $168 a month-by-month year against $99.95, and Pro is $359.40 against $199.95. The page labels the yearly option "Save 40%."

If you only need one big cleanup, the yearly plan costs more than a month or two of the monthly plan. Mailstrom doesn't refund the unused part of a year if you cancel early, as the next section explains.

How do you cancel Mailstrom, and can you get a refund?

You cancel at mailstrom.co/settings, and you get no refund. The terms say:

• "Paid Mailstrom plans are prepaid and are non-refundable."
• "Mailstrom DOES NOT PROVIDE REFUNDS OR CREDITS FOR ANY PARTIAL MONTHS OR YEARS."
• "You may cancel your account at any time, and the cancellation will take effect immediately."
• "You must cancel your account before it renews each month or year in order to avoid billing of the next month's or year's fees."

The important word is "immediately." Your plan doesn't run to the end of the period you paid for. It stops when you cancel, so if you cancel a yearly plan in month two, you lose the rest of the year. If you want to stop the renewal, cancel close to the renewal date.

Cancelling doesn't remove Mailstrom's access to your mail. Also remove it in your Google, Microsoft or Yahoo account's connected apps, or delete the iCloud app-specific password you made for it. Mailstrom's privacy policy says it keeps your data "for up to three months" after you delete your account, "unless you request otherwise by emailing privacy@mailstrom.com."

Why does Mailstrom charge a subscription?

Because its rules keep running after the cleanup. The FAQ says subscribers "benefit from having their mail loaded continuously." That is what lets Block filter "future messages that match," Expire clear a sender's mail after a time you set, and Chill bring mail back on a date you pick. A one-time cleanup doesn't need any of that, so you pay monthly for the rules, not the sweep.

Is Mailstrom worth it?

It's worth a month if you have years of mail to clear and want to do it in bulk from a browser. Mailstrom's grouping by sender, subject, date and size is its core, and every plan has unlimited removal.

It's harder to justify as a standing cost. Your rules work only while you pay. The trial can act on only 25% of up to 5,000 messages, so you can't test it on your whole inbox. And the terms leave no room to change your mind after you pay.

For tools that replace each of Mailstrom's jobs, see our Mailstrom alternatives.

Cheaper ways to clean up your inbox: Alrighty and three free options

Alrighty. Alrighty is our mail app for Mac, Windows and Linux. It does Mailstrom's ongoing job inside the app you read mail in, for iCloud, Gmail and Outlook accounts in one inbox. Stop mail unsubscribes you from a sender every way the message offers, archives their mail, and moves their new mail out as it arrives. Clean up lists the senders you likely don't want, such as scams, cold outreach and newsletters you never open, so you can stop them all at once. To delete in bulk, check rows, Shift-click a range, or check all, then click Delete. The price is a 14-day trial with no card, then a Free plan or Pro. What it can't do: it has no tool to delete by date or size, and nothing like Chill or Expire. It takes no Yahoo or AOL accounts. Clean up sends each sender's address and up to 3 of their newest emails to Alrighty's server, which asks an AI model to sort them. See the features.

Gmail's own search. Search with from:, older_than: or larger: (Google), select every conversation that matches, and delete. It's free, and it works on your whole mailbox.

Outlook's Sweep. In Outlook.com and Outlook on the web, select a message and choose Sweep to delete all mail from that sender, or keep only the latest (Microsoft).

Clean Email. A free account lets you "clean up to 1,000 email messages at no cost," and a 14-day Premium trial needs no card (Clean Email).

For a wider list, see the best app to bulk delete emails.

Questions

Does Mailstrom renew automatically?

Yes. The terms say your plan "will continue in effect unless and until you or we cancel your account," and Mailstrom bills the card you gave it each month or year. Cancel before the renewal date to avoid the next charge.

Can I get a refund if Mailstrom didn't work for my account?

The terms say paid plans are non-refundable, with no refunds or credits for partial months or years. Use the free trial first to check that your account connects. If you have a billing problem, Mailstrom's support address is support@mailstrom.com.

Does Mailstrom offer a lifetime plan or a discount?

Mailstrom's own pricing page shows only the monthly and yearly plans, with the yearly plan as the discount. Groups can ask sales@mailstrom.co for group or enterprise pricing. We found no student price on its pages.

Does Mailstrom use AI to sort my mail?

No. Mailstrom groups mail by sender, subject, date and size, and you choose what to do with each group. Its home page calls it "a power tool that amplifies your human intelligence," set against AI that tries "to guess what you think is important" (Mailstrom).