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Company profilemailshell.com ↗

Mailshell

Mailshell provides Internet filtering engines and SDKs to OEMs.

Computer and Network Security
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Headquarters
San Francisco, California, United StatesSource: RevenueBaseRetrieved October 13, 2026
Employee range
11 to 50Source: RevenueBaseRetrieved October 13, 2026
Founded
1999Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
3 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Mailshell do?

Its filtering scope includes email reputation, anti-spam, anti-phishing, URL categorization and DNS security. Mailshell states that its reputation-based AI filters are used worldwide through OEM partners to block fraud, spam and phishing.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

Internet filtering engines and SDKs

The company supplies these to OEMs, with functions including email reputation, anti-spam, anti-phishing, URL categorization and DNS security.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

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Embeddable award for your website

BADGE PREVIEWMailshell listed #9 on Web content filtering companies, September 21, 2026Open the published source list.
Mailshell

#9 Web content filtering companies

Snapshot: September 21, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 21, 2026. How the company lists are built.

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