Customer.io Your Customer Engagement Platform

Leverage marketing automation and customer data in a single Customer Engagement Platform to personalize your customer communications and drive more en...

Customer.io Quick Summary

Status

Online

Server IP address resolved: Yes

Http response code: 200

Response time: 0.15 sec.

Last Checked: 08/23/2025

Customer.io traffic estimate is about 2,709 unique visitors and 13,355 pageviews per day. The approximated value of customer.io is 236,520 USD. Every unique visitor makes about 4.93 pageviews on average.

Alexa Traffic Rank estimates that customer.io is ranked number 36,581 in the world, while most of its traffic comes from United States, where it occupies as high as 17,114 place.

It’s good for customer.io that their hosting company AMAZON-02 - Amazon.com, Inc., US is located in United States, as that provides the majority of their visitors to benefit from the faster page load time. See the list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.

Customer.io is registered under .IO top-level domain. Check other websites in .IO zone.

During the last check (October 13, 2024) customer.io has an expired SSL certificate issued by Let's Encrypt (expired on January 08, 2025), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by Let's Encrypt.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust customer.io is pretty a safe domain.

Relying on Google Mobile-Friendly test customer.io is well optimized for mobile and tablet devices.

Customer.io General Information

Customer.io Audience Geography

Where are website visitors coming from?

Customer.io Traffic Distribution

Where do visitors go on customer.io?

SubdomainPageviews
fly.customer.io77.32%
customer.io19.56%
track.customer.io2.78%
other0.34%

Customer.io Popularity

How popular is customer.io?

PeriodGlobal RankGlobal Rank Delta
past 3 months48868-11417
past month5740111169
past week57646-19692
yesterday42825-3079

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Customer.io Safety Information

Rankchart Summary

Safe

Updated: 08/23/2025

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Safe

Updated: 03/22/2025

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Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.

Google Safe Search

Safe

Updated: 02/07/2019

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SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.

Google Safe Browsing

Safe

Malware not found

Phishing not detected

Unwanted software not found

Harmfull applications not found

Updated: 01/09/2019

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Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

McAfee® WebAdvisor

Safe

Updated: 02/22/2021

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McAfee assesses customer.io for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze customer.io for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Child safety is very good

Updated: 01/09/2019

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The WOT calculates reputation of the customer.io. This reputation system receives ratings from users and information from third-party sources, assesses the customer.io for safety features and confirms, whether customer.io is suitable for children.

Customer.io SSL Information

Information about SSL/TLS certificates

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Domaincustomer.io
Issuer OrganizationLet's Encrypt
IssuerR10
AlgorithmRSA-SHA256
Valid form10/10/2024
Expiration01/08/2025
SignedCertificate is not self signed
Additional Domainscustomer.io

Customer.io Server Information

Customer.io Server Location

Where website hosting server is located?

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Customer.io ASN Information

Information about IP address owner

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ASN ID: 16509

ASN Title: AMAZON-02 - Amazon.com, Inc., US

Updated: 04/10/2025

Customer.io Domain Name Information

Customer.io DNS Information

Domain name service records

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HostA RecordTTL
customer.io76.76.21.2160

Customer.io Whois Information

Information about registered users or assignees of an Internet resource

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Customer.io HTML Validation

Customer.io W3C HTML Markup Validation

HTML markup errors and warnings

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Errors:
Warnings:

Customer.io Desktop Performance

How Well Customer.io Performs On Desktops?

Website desktop performance and usability tips

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Speed

78%

78%


Updated: 12/06/2019

Customer.io Mobile Performance

How Optimized Is Customer.io for Mobile Devices?

Tips on speeding up mobile site performance

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Usability

100%

100%


Updated: 12/06/2019

Customer.io Nearest Competitors

Customer.io URL Typos

Most common user URL mistypes for customer.io

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