Mailstrom

Spec sheet

What it does

Mailstrom is a web-based email client for bulk deleting, archiving and moving hundreds or thousands of messages.Read 15 Oct 2026 · mailstrom.co

Integrations

Mailstrom connects to Gmail, Outlook, AOL, iCloud and other providers that support IMAP.Read 15 Oct 2026 · mailstrom.co

Security

The FAQ says IMAP passwords are stored with 256-bit salted AES encryption and OAuth is used when available.Read 8 Oct 2026 · mailstrom.co

Support

Mailstrom directs users with questions or issues to [email protected].Read 8 Oct 2026 · mailstrom.co

Headquarters

Baltimore, Maryland, United StatesRead 28 Sep 2026 · mailstrom.co

Founded

2013Read 28 Sep 2026 · mailstrom.co

Authentication

For Gmail, Outlook and Yahoo, Mailstrom says it uses IMAP through OAuth2 so it does not receive the account password.Read 15 Oct 2026 · mailstrom.co

Automatic rules

Subscribers can create rules that automatically move future messages matching a sender or subject.Read 15 Oct 2026 · mailstrom.co

Blocking

Block removes matching mail and creates a rule for future messages from a sender, list or subject.Read 15 Oct 2026 · mailstrom.co

Bulk cleanup

It lets users delete, archive, and move messages by the hundreds or thousands.Read 8 Oct 2026 · mailstrom.co

Bulk grouping

The service groups related messages so users can act on whole bundles at once.Read 15 Oct 2026 · mailstrom.co

Chill

Chill removes selected mail and returns it to the inbox on a date chosen by the user.Read 15 Oct 2026 · mailstrom.co

Chill and Expire

Chill returns selected messages to the inbox on a chosen date, while Expire removes selected messages after a chosen period; both are subscriber features.Read 8 Oct 2026 · mailstrom.co

Company legal name

The privacy policy identifies the maker as 410 Labs, Inc., doing business as Mailstrom.Read 15 Oct 2026 · mailstrom.co

Company profile

LinkedIn lists 410 Labs as privately held, founded in 2010, headquartered in Baltimore, Maryland, with 2–10 employees.Read 15 Oct 2026 · linkedin.com

Data handling

Mailstrom says it stores subject lines and message metadata on its servers, while accessing message contents when displaying mail and for uses described in its privacy policy.Read 15 Oct 2026 · mailstrom.co

Email data

Mailstrom says it stores subject lines and metadata on its servers, while it can access email contents when displaying messages.Read 8 Oct 2026 · mailstrom.co

Email providers

The FAQ names Gmail, Outlook, AOL, iCloud, Yahoo, and Microsoft Exchange accounts with IMAP enabled as supported connection examples.Read 8 Oct 2026 · mailstrom.co

Expire

Expire removes selected messages after a chosen period using sender or mailing-list rules.Read 15 Oct 2026 · mailstrom.co

Filters and rules

Subscribers can create custom rules to filter messages and automatically move incoming messages into folders.Read 8 Oct 2026 · mailstrom.co

Folder limitation

The FAQ says organizing messages in folders other than the inbox was not yet supported on that page.Read 15 Oct 2026 · mailstrom.co

Founders

LinkedIn names Dave Troy and Matthew Koll as 410 Labs founders.Read 15 Oct 2026 · linkedin.com

Funding

Wellfound lists Mailstrom as a 1–10-person startup with $750,000 raised.Read 15 Oct 2026 · wellfound.com

GDPR

The privacy policy describes GDPR legal bases and rights including access, correction, erasure, restriction and portability.Read 15 Oct 2026 · mailstrom.co

IMAP limitation

Mailstrom cannot connect to providers that do not support IMAP, including POP-only accounts.Read 15 Oct 2026 · mailstrom.co

Inbox grouping

Mailstrom identifies bundles of related mail so users can act on groups of messages at once.Read 8 Oct 2026 · mailstrom.co

License terms

The terms grant a personal, non-transferable license to use object code and prohibit copying, modification, reverse engineering and access outside the provided interface.Read 15 Oct 2026 · mailstrom.co

Limit: mobile app

A G2 reviewer complained that Mailstrom lacked an app.Read 15 Oct 2026 · g2.com

Limit: Outlook compatibility

A G2 reviewer reported that an Outlook account stopped working after newer OAuth security protocols.Read 15 Oct 2026 · g2.com

Limit: synchronization

The Capterra reviewer said synchronization was slow before the inbox finished loading.Read 15 Oct 2026 · capterra.com

Limit: trial and price

G2 reviewers criticized the limited trial and said the service was expensive for some small businesses.Read 15 Oct 2026 · g2.com

Maker and location

Mailstrom says it is made by 410 Labs, whose contact address is in Baltimore, Maryland.Read 8 Oct 2026 · mailstrom.co

Notable news: 2013 launch

TechCrunch reported on March 27, 2013 that Mailstrom had reached about 35,000 users, stored more than 412 million emails and processed roughly 115 million removals.Read 15 Oct 2026 · techcrunch.com

Praise: bulk cleanup

G2 reviewers repeatedly praise quickly deleting or organizing thousands of messages and reaching inbox zero.Read 15 Oct 2026 · g2.com

Praise: usability

G2 reviewers describe signup and the interface as easy, fast and simpler than ordinary Gmail sorting.Read 15 Oct 2026 · g2.com

Privacy and compliance

Mailstrom states it is committed to compliance with European GDPR standards and lists email providers, Google, Stripe, IBM Softlayer, and Amazon AWS among data-processing vendors.Read 8 Oct 2026 · mailstrom.co

Protocol limitation

Mailstrom works using IMAP and cannot connect to email providers that do not support IMAP.Read 8 Oct 2026 · mailstrom.co

Rating on Capterra

5.0 out of 5 from 1 review.Read 15 Oct 2026 · capterra.com

Rating on G2

4.2 out of 5 from 13 reviews.Read 15 Oct 2026 · checkthat.ai

Rating on Software Advice

5.0 out of 5 from 1 review.Read 15 Oct 2026 · softwareadvice.com

Reports

The FAQ lists daily or weekly email reports as an inbox-management feature.Read 15 Oct 2026 · mailstrom.co

Retention

After account deletion, Mailstrom may retain data for up to three months unless the user requests earlier deletion.Read 15 Oct 2026 · mailstrom.co

Security storage

IMAP passwords are stored with 256-bit salted AES encryption and Mailstrom account passwords with a salted one-way hash.Read 15 Oct 2026 · mailstrom.co

Trial limits

The free trial is a one-time inbox snapshot, loads at most the latest 5,000 messages, and permits actions on 25% of messages without a credit card.Read 8 Oct 2026 · mailstrom.co

Trial mechanics

The free trial loads a one-time snapshot, limits loading to the latest 5,000 messages when necessary and permits actions on 25% of messages without a credit card.Read 15 Oct 2026 · mailstrom.co

Unsubscribe

Its Unsubscribe tool sends unsubscribe requests or opens the relevant web unsubscribe page.Read 15 Oct 2026 · mailstrom.co

Plans and prices

Every Mailstrom plan and price →

Where Specifiction places it

• Email Cleanup Software#9 of 318.4