Company	Industry	Purpose	Location
Aboon aboon.com	Fintech	Email marketing	Global
Atlas khoros.com	Community Management	CRM	USA
Axiom axiom.co	Observability	Transactional, broadcast, and marketing messaging	USA, EU
Benepass getbenepass.com	HR Tech	Customer email communications	USA
BetterCloud tricent.com	SaaS Management	Sends application emails for customer configured alerts.	Beaverton, Oregon, USA
BetterCloud bettercloud.com	SaaS Management	Sends application emails for customer configured alerts.	Beaverton, Oregon, USA
Chameleon chameleon.io	Productivity	Manages email communications with customers	US
CloudQuery Terms of Use cloudquery.io	Cloud Infrastructure	Analytics & Marketing	—
Duome duome.co	Workplace Management / Hybrid Work Solutions	Email & messaging automation	Not specified
Edmentum edmentum.com	EdTech	Marketing Communications Automation	Beaverton, OR 97008
Elicit elicit.com	AI for Scientific Research	Emailing updates to users and customers	US
Flux flux.ai	Hardware/AI/Design Automation	Email Infrastructure	United States
Fly.io fly.io	Cloud Infrastructure	Newsletters and transactional email	United States
Focusmate focusmate.com	Productivity	Email marketing	USA
Forest Admin forestadmin.com	Fintech	Cloud Service Provider / Messaging workflows	European Union
GitGuardian gitguardian.com	Cybersecurity	Data analytics allowing user dashboard, behavior monitoring and profile data on Platform and Public Monitoring	United States
Healthjoy healthjoy.com	HealthTech	Message Delivery	United States
HeyGen heygen.com	AI Video Generation	Email Communication	United States
Hiive hiive.com	Fintech	Marketing automation platform	USA
Hyperbound hyperbound.ai	Sales Training Technology	Email and customer engagement	USA
Jobber getjobber.com	Field Service Management	Multichannel messaging; customer journeys	USA
Kimia kimia.ai	AI/ML, Chemical Intelligence	Marketing	N/A
list and responsibilities simbase.com	IoT Connectivity	E-mail marketing services.	United States
Meetfranz meetfranz.com	Productivity	Email automatization	United States of America
Mercor mercor.com	AI/ML	Marketing	USA
Metabase metabase.com	Analytics	Email communications.	United States
Mixmax mixmax.com	Sales Technology	Customer Messaging	USA
Names & Faces namesandfaces.com	HR Tech	Send email, push & in-app messages	USA
Notion notion.so	Productivity	Transactional, broadcast, and marketing messaging	USA
OpenSesame opensesame.com	EdTech	Messaging	USA
Overleaf data processors overleaf.com	EdTech	User communication	US
Parabola parabola.io	Workflow Automation	Customer messaging	N/A
People.ai people.ai	Sales and Revenue Management	Processing operational customer data	United States
Plain plain.com	AI/ML	Marketing Analytics	US & EU
Powered by SafeBase railway.com	Cloud Infrastructure	Platform and Marketing Messaging	United States
Pushsecurity pushsecurity.com	Cybersecurity	Sales and marketing	US
Railway railway.app	Cloud Infrastructure	Platform and Marketing Messaging	United States
RescueTime rescuetime.com	Productivity Software	Customer interactions	USA
Respond.io respond.io	Customer Communication Platform	Revenue attribution and sales analytics	USA
Rows rows.com	Productivity	CRM emails services	USA
Skeepers skeepers.io	Marketing	Activation marketing	Belgique
SmartPath joinsmartpath.com	Fintech	External communications	Not specified
Social Card joinsocialcard.com	Marketing	Email Delivery	Not specified
Spinach spinach.ai	AI/ML	System & marketing emails	United States
Springworks springworks.in	HR Tech	External communication	Oregon, USA
SquaredUp Cloud Support squaredup.com	DevOps	Marketing / Analytics	USA
Stable usestable.com	Mail Management / AI Automation	Marketing	USA
Stacksi stacksi.com	Cybersecurity	Email Delivery	United States
Sub Processors chargeover.com	Fintech	Sending email to customers	Unknown
Sunday App sundayapp.com	Fintech	Customer Communications	EU
Tapcart tapcart.com	E-commerce	Customer Communication	United States
Telzio telzio.com	Cloud Communications	Automation of email delivery	USA
Textline textline.com	Communication/Business SMS	System and Marketing Emails	USA
Trunk trunk.io	DevOps	Customer Relationship Management	United States
Tuple tuple.app	Productivity	Email campaigns for onboarding and app updates	United States
Typefully typefully.com	Social Media Management, AI Tools	Customer messaging and lifecycle operations.	USA
Upfort upfort.com	Cybersecurity	Transactional and/or Marketing Emails	USA
Usercheck usercheck.com	Email Validation, Cybersecurity	Email automation	EU
Validity validity.com	Marketing	Customer Communications	US
Vantage vantage.sh	Fintech	Customer Communications	USA
Warp warp.dev	DevOps	Customer data	US
Whimsical whimsical.com	Productivity	Email service provider	USA
WiseStamp wisestamp.com	Marketing	Marketing emails	USA
Yesware yesware.com	Sales Engagement	Customer analytics	USA

Frequently Asked Questions

How many companies use Customer.io as a sub-processor?

Customer.io is used by 64 companies as a third-party data processor (sub-processor) based on their public GDPR disclosures.

What industries use Customer.io?

Customer.io is most commonly used in Fintech, Productivity, Cloud Infrastructure, Cybersecurity, Marketing.

What is Customer.io used for?

Customer.io is primarily used for communication, and also for analytics & monitoring, marketing & advertising, crm.