Take it from the experts
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.
Learn how Mailgun increased its customer onboarding rate by 30% through their partnership with Customer.io.
- SaaS
- Mobile Apps
- Marketplace
- EdTech
- Financial Services
- Health Services
- Subscription
- Media
- eCommerce
- Non-Profit
- Small Business
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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
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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 
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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
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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 
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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
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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 -
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
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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 -
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
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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
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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
Learn how Wedio uses Customer.io to increase users on their marketplace and increase revenue by 26%
Read Wedio’s story 
Find out how Mysa grew their email marketing revenue by over 592% with Customer.io.
Read Mysa’s story
See how Guardio uses Customer.io to achieve 20% of their total monthly upgrade revenue by leveraging lifecycle campaigns
Read Guardio’s story
Learn how Spotahome using Customer.io to facilitate communication with their community to be 5x more efficient
Read Spotahome’s story
Discover how Olivia doubled their activation rate by running cohort tests.
Read Olivia’s story
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
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.