ISheriff

iSheriff
TypePrivate
IndustryInformation Security
Founded1999
Headquarters
Redwood City, California
,
United States
Key people
Oscar G Marquez
(CTO & founding member)
ProductsE-mail filtering,
Web filters,
Email Archiving,
Endpoint Security
All products are cloud-based
Websitewww.isheriff.com

iSheriff (formerly Internet Sheriff) is an Internet security software vendor that specializes in cloud-based security and compliance, with specialties in E-mail filtering, Web filters and endpoint security. The company is privately held and based in Redwood City, California. iSheriff sells their products through partners and distributors.[1]

History

Founded in Brisbane, Australia in 1999 by Oscar Marquez, iSheriff products focused on content filtering, email and Web filtering software and appliances. In 2009 the company moved its products to a cloud computing service model. iSheriff services include e-mail filtering, web filtering, email archiving, e-mail encryption and security reporting. The company holds a patent for its data modeling engine based on Bayesian spam filtering principals.

In 2006, iSheriff provided Internet filtering software to the Tasmanian government's first statewide trial of anti-pornography filters for children.[2][3]

In July 2012, Total Defense, Inc., a provider of cybercrime-fighting technology, announced they had acquired iSheriff.[4] On April 21, 2014, Total Defense announced that, in conjunction with the sale of their consumer business unit to Untangle, they re-branded as iSheriff.[5]

In November 2016, Mimecast announced that it had purchased substantially all of the assets of iSheriff.[6] Mimecast was later acquired by private equity firm Permira for $5.8 billion.[7]

References

  1. ^ "MSP Mentor". Archived from the original on 2014-04-23. Retrieved 2014-04-21.
  2. ^ Schubert, Misha (2006-04-12). "Parents log on to trial internet pornography ban". The Age. Retrieved 2021-04-02.
  3. ^ "Free porn filter trial". The Sydney Morning Herald. 2006-04-12. Retrieved 2021-04-02.
  4. ^ "Total Defense buys cloud security company iSheriff". www.bizjournals.com. Retrieved 2021-04-02.
  5. ^ "The Herald". Archived from the original on 2014-04-22. Retrieved 2020-01-20.
  6. ^ "Mimecast says purchasing substantially all of assets of iSheriff". Reuters. 2016-11-23. Retrieved 13 December 2025.
  7. ^ "Austin's Best CFOs: Eric Jenny". Austin Business Journal. 2022-07-18. Retrieved 13 December 2025.{{cite web}}: CS1 maint: deprecated archival service (link)

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