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Customer.io

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Customer.io is a behavioral messaging platform for triggering personalized and event-based customer communication.

Email Analytics
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Market Share of Customer.io

Current Customer(s)

1835

Market Share (Est.)

2.30%

Ranking

#4

Top Competitors and Alternatives of Customer.io

The top three of Customer.io’s competitors in the Email Analytics category are Constant Contact with 85.94%, Zoho Campaigns with 5.58%, EveryCloud Email Security with 2.78% market share.

TechnologyDomainsMarket Share (Est.)Versus page
Constant Contact6869085.94%Customer.io vs Constant Contact
Zoho Campaigns44575.58%Customer.io vs Zoho Campaigns
EveryCloud Email Security22182.78%Customer.io vs EveryCloud Email Security
Benchmark12271.54%Customer.io vs Benchmark
EmailAnalytics6470.81%Customer.io vs EmailAnalytics
Pepipost3740.47%Customer.io vs Pepipost
BlueHornet3230.40%Customer.io vs BlueHornet
SparkPost1170.15%Customer.io vs SparkPost
RebelMail120.02%Customer.io vs RebelMail
G-Lock Analytics70.01%Customer.io vs G-Lock Analytics
Dyspatch60.01%Customer.io vs Dyspatch
Briefmetrics50.01%Customer.io vs Briefmetrics
Metrics Watch30.00%Customer.io vs Metrics Watch
Email Aptitude30.00%Customer.io vs Email Aptitude
MailButler20.00%Customer.io vs MailButler
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Popular Comparisons

Top Competitors and Alternatives of Customer.io

The top three of Customer.io’s competitors in the Email Analytics category are Constant Contact with 85.94%, Zoho Campaigns with 5.58%, EveryCloud Email Security with 2.78% market share.

Customer.io vs Constant Contact

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Customer.io vs Zoho Campaigns

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Customer.io vs EveryCloud Email Security

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Customer.io vs Benchmark

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Customer.io vs EmailAnalytics

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Customer.io vs Pepipost

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Customer.io vs BlueHornet

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Customer.io vs SparkPost

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Customers of Customer.io

Around the world in 2025, over 1801 companies have started using Customer.io as Email Analytics tool.

CustomersEmployee RangeCityRegionCountrySocial Links
Tech For Campaigns10,000+San FranciscoCaliforniaUnited States
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Gartner, Inc.10,000+StamfordConnecticutUnited States
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Macpherson Records10,000+BarcelonaCataloniaSpain
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PwC10,000+LondonEnglandUnited Kingdom
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Five Below10,000+PhiladelphiaPennsylvaniaUnited States
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Venture10,000+AnaheimCaliforniaUnited States
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Ciena5,000 - 9,999HanoverMarylandUnited States
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Studio Moderna5,000 - 9,999Zagorje ob SaviZagorje ob SaviSlovenia
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Bankinter, S.A.5,000 - 9,999MadridMadridSpain
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Chapters Inc.5,000 - 9,999EtobicokeOntarioCanada
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Customer.io Customers by Products and Services

The top three products and services offering customers that use Customer.io for Email Analytics are Saas (36), Technology (32), Fintech (30).

Customers

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Customer.io Customers by Employee Size

The majority of Customer.io's customers for the email-analytics category fall in the company size of 0 - 9 employees (613 companies), 20 - 49 employees (502 companies), 100 - 249 employees (329 companies).

Employee Size

Customer.io Customers by Geography

The top three geographies of Customer.io for email-analytics are the United States with 973(63.35%), Brazil with 177(11.52%), United Kingdom with 98(6.38%) customers respectively.

Customers

Employees of Customer.io

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Also see other Products/Services by Customer.io in:

Email Marketing Automation
Email Personalization
Email Analytics

FAQ

Find answers to the most often asked questions by users.

Who are the top Customer.io competitors?

Customer.io’s Top competitors in the email-analytics category are Constant Contact, Zoho Campaigns, EveryCloud Email Security. You can view a full list of Customer.io competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Customer.io and 40,000 other technologies on the internet. You can also compare Customer.io and its feature with top competitors here : Customer.io vs Constant Contact Customer.io vs Zoho Campaigns Customer.io vs EveryCloud Email Security.

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What is Customer.io customer distribution based on company size?

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What is Customer.io market share in the email-analytics?

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What are the top countries that use Customer.io?

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What are the top industries that use Customer.io?

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