Our Customers

Take it from the experts

Join thousands of businesses around the globe who use Customer.io to send their automated messaging campaigns and strengthen relationships.
Clearbit logo
Segment  logo
CareGuide logo
The knot logo
Buffer  logo
Asics  logo
IFTTT  logo
Billie  logo
Mailgun  logo
Zwift  logo
Reddit  logo
Pill Pack by Amazon  logo
Obe  logo
Grove  logo
Mapbox  logo
Notion  logo
Headshot of Jamie Quint

Notion logo

Eager for a platform that put logical reasoning into their design decisions, Notion made the switch to Customer.io 8 days before their annual renewal.

Read Notion’s storyarrow pointing to the right

Headshot of Nick Lafferty

Mailgun logo
Learn how Mailgun increased its customer onboarding rate by 30% through their partnership with Customer.io.

Read Mailgun’s storyarrow pointing to the right

For tech companies that want to build trust

  • SaaS businesses

    With the flexibility and interoperability of Customer.io we’ve been able to build some truly insane and elaborate onboarding flows. We’re sending webhooks, moving people down different paths, A/B testing, adding dynamic content with liquid, and automatically segmenting based on where the user came from. If a colleague asks me if Customer.io can do something cool, no matter what they ask my immediate answer is always, “Yes. Yes it can.” I love always having the answers!

    Ammon Brown, VP of Growth at x.ai

    X.ai Logo     Segment Logo     Notion logo     Clearbit Logo     Close.io Logo      Buffer Logo      IFTTT Logo

  • Mobile App businesses

    Customer.io has grown and surpassed Zwift’s needs over the years. Their tireless commitment to agile improvements to the platform has helped us to drive engagement through personalized and timely communications with our community.

    Jonathan Walton, CRM Manager at Zwift

    Zwift Logo    Burn Along Logo    Obe Fitness Logo      TripScout Logo     InsightTimer Logo      Brainscape Logo      Watchworthy Logo

  • Marketplace businesses

    Our team is so pleased with our choice to switch our email marketing platform to Customer.io! They have a team of Email and Deliverability experts who will help you create the right message at the right time.

    Stephanie Vazquez, Email Marketing Specialist at Fixd Repair, ANGI Homeservices

     Fixd Repair Logo      Handy Logo  CareGuide Logo  The Knot Logo        Caring.com Logo

  • EdTech businesses

    This has been, hands down, my best experience with any email or marketing automation SaaS company.

    Greg Sherrid, Co-Founder and CTO at Whooo’s Reading

     Whooo’s Reading Logo      Code Combat Logo      Product School Logo      Prodigy Math Game Logo      DataCamp Logo     Flowkey Logo     GoNoodle Logo   

  • FinTech businesses

    Customer.io is really helpful and always quite fast to get back to us when we have any questions.

    Kasper Ernerot
     Communication Manager at Lendify

    Lendify Logo     FairMoney Logo      Mission Lane Logo      Payr Logo      Online Tax Rebate Logo.png      Ebanx Logo     e-file Logo

  • Health care businesses

    Customer.io has proven very useful for this in the past years. The fine-grained control, pleasantly responsive UI and fast support response times not only make Customer.io a powerful tool that we lean on, but also a pleasure to work with.

    Nathan Skwortsow, Co-Founder and CTO at Physitrack

    Physitrack Logo      Curebase Logo      Amazon PillPack Logo      HealthJoy Logo      Spire Health Logo      Form Health Logo   

  • Subscription businesses

    We send every single customer profile from our database and pipe it into Customer.io. And it has been so easy! Being a subscription company, your customer’s status changes all the time…so we need a platform that automatically updates people’s values whenever they change.

    Michelle Ballen, Director of Growth at Billie

     Purple Carrot Logo     Mindful Chef Logo     Shavekit Logo     Succulent Studio Logo     Vitl Logo

  • Media businesses

    Customer.io dramatically improved the way we communicate with our customers. The app is extremely simple to set up and use, allowing any of our staff to easily create and send meaningful email campaigns. 

    Ben Buckwold, CEO at Red River Press Inc. & ESLLibrary.com

    ESL Library logo    Reddit Logo   The Information Logo     Airmail Logo     Realm Logo

  • eCommerce businesses

    Customer.io is awesome! I highly recommend them to anyone who wants flexibility to optimize their messaging across channels.

    Bjørn Seaton, CMO at Trendhim

    Trendhim Logo     Asics logo     Billie logo   Grove Collaborative Logo     BOLDKING logo    Resnap Logo

  • Non-profit businesses

    Using Customer.io has boosted our numbers in every imaginable way — from audience growth to engagement to conversion. They are literally helping us change lives around with world by making sure we have the best email tool available.

    Grace Garey, Co-founder at Watsi

    Watsi Logo      Unicef USA Logo     DoSomething Logo      JGive Logo

  • Small businesses

    We love using Customer.io to engage with our users. When a user first logs in they get an email, and they have easy setups for user specific in app triggers. The support has been superb in answering our questions quickly and effectively.

    Zack M, G2 Review

    G2 Logo    

The stories that motivate our work

Demand Curve

Check out how Demand Curve utilizes Customer.io’s unlimited event attributes and dedicated IP’s to better connect with their audience.
Read Demand Curve’s story arrow pointing to the right 

Mido Lotto

Learn how Mido Lotto increased their paying customers by 2000% with SMS using Customer.io.
Read Mido Lotto’s story arrow pointing to the right 


Find out how TryHackMe achieves 10% month-over-month revenue growth with Customer.io.
Read TryHackMe’s story arrow pointing to the right 

Screenshot of Watsi's donation sign up form

Learn how StuDocu keeps their 15 million global monthly users engaged across 60 countries and 17 languages.
Read StuDocu’s story arrow pointing to the right 

Team photo of Arcadia Power

Read how DoSomething improved their deliverability to 2.8x their open rate and 4.95x their click-through rate
Read DoSomething’s story arrow pointing to the right 

A person is prepping a meal

Discover how Purple Carrot went from updating its ad audiences every 90 days to every hour.
Read Purple Carrot’s story arrow pointing to the right 

As a customer-funded company, we guarantee you’re our top priority.

Headshot of Lauren Triano

In my experience, it’s rare to have a vendor reach out to ask what they can be doing better. In 3-months time we mentioned what would be super helpful if it was built into the system, and it actually came to fruition.

Lauren Triano, Senior Manager at Billie