Company	Industry	Purpose	Location
Aderant aderant.com	Legal Tech	Office 365	USA, Canada, UK, Ireland
Ahrefs ahrefs.com	SEO & Marketing Technology	Productivity and collaboration management	USA
Circuitry.ai circuitry.ai	AI/ML	Exchange, Sharepoint, Teams	USA
Contractpedia: Contract Management Software contractpedia.com	Contract Management/Cloud Infrastructure	Office suite, online storage and Email.	EU
Customsplus customsplus.co.uk	Customs Technology	Stores customer data before processing by MyCustomsInfo Analysis (Legacy)	United Kingdom
Customsplus customsplus.co.uk	Customs Technology	Receives and sends emails messages and data used for internal and external communication	United Kingdom
Customsplus customsplus.co.uk	Customs Technology	Receives, stores and sends messages and data used for internal and external communication	United Kingdom
Customsplus customsplus.co.uk	Customs Technology	Receives and stores emails data to the relevant endpoints/recipients (Portal)	United Kingdom
Customsplus customsplus.co.uk	Customs Technology	Receives customers data via email and sends customer BI's (Legacy)	United Kingdom
Encyro, Inc. encyro.com	Cybersecurity	Email communications, help requests	United States
Nativo nativo.com	Ad Tech	Software; database management	USA
Outthink outthink.io	Cybersecurity	Cloud infrastructure for information assets, video and audio communications	United Kingdom
Pirros pirros.com	Productivity	Internal Communications	USA
Protex AI protex.ai	HealthTech	Productivity suite	US
Resgrid resgrid.com	Public Safety Technology	Business Email Services and File Storage	USA
Sigma5C sigma5c.com	AI/ML	Email & Productivity	US
Sub Processors getreprise.com	DevOps	MS Word, Excel, Powerpoint	USA
Sub Processors reprise.com	Productivity	MS Word, Excel, Powerpoint	USA

Frequently Asked Questions

How many companies use Microsoft 365 as a sub-processor?

Microsoft 365 is used by 18 companies as a third-party data processor (sub-processor) based on their public GDPR disclosures.

What industries use Microsoft 365?

Microsoft 365 is most commonly used in Customs Technology, AI/ML, Cybersecurity, Productivity, Legal Tech.

What is Microsoft 365 used for?

Microsoft 365 is primarily used for communication, and also for cloud infrastructure, collaboration, business operations.