Customer.io
Customer.io is a behavioral messaging platform for triggering personalized and event-based customer communication.
Market Share of Customer.io
Current Customer(s)
1986
Market Share (Est.)
2.39%
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 84.30%, Zoho Campaigns with 7.44%, EveryCloud Email Security with 2.40% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Constant Contact | 70190 | 84.30% | Customer.io vs Constant Contact |
| Zoho Campaigns | 6191 | 7.44% | Customer.io vs Zoho Campaigns |
| EveryCloud Email Security | 2000 | 2.40% | Customer.io vs EveryCloud Email Security |
| Benchmark | 1250 | 1.50% | Customer.io vs Benchmark |
| EmailAnalytics | 723 | 0.87% | Customer.io vs EmailAnalytics |
| Pepipost | 345 | 0.41% | Customer.io vs Pepipost |
| BlueHornet | 287 | 0.34% | Customer.io vs BlueHornet |
| SparkPost | 220 | 0.26% | Customer.io vs SparkPost |
| Dyspatch | 24 | 0.03% | Customer.io vs Dyspatch |
| RebelMail | 15 | 0.02% | Customer.io vs RebelMail |
| G-Lock Analytics | 10 | 0.01% | Customer.io vs G-Lock Analytics |
| Email Aptitude | 8 | 0.01% | Customer.io vs Email Aptitude |
| Briefmetrics | 5 | 0.01% | Customer.io vs Briefmetrics |
| Metrics Watch | 4 | 0.00% | Customer.io vs Metrics Watch |
| MailButler | 2 | 0.00% | Customer.io vs MailButler |
| Ezepo | 2 | 0.00% | Customer.io vs Ezepo |
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 84.30%, Zoho Campaigns with 7.44%, EveryCloud Email Security with 2.40% market share.
Customer.io vs Constant Contact
Customer.io vs Zoho Campaigns
Customer.io vs EveryCloud Email Security
Customer.io vs Benchmark
Customer.io vs EmailAnalytics
Customer.io vs Pepipost
Customer.io vs BlueHornet
Customer.io vs SparkPost
Customers of Customer.io
Around the world in 2026, over 1974 companies have started using Customer.io as Email Analytics tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Upwork | 10,000+ | San Francisco | California | United States |     |
| Macpherson Records | 10,000+ | Barcelona | Catalonia | Spain | |
| Santander | 10,000+ | Boadilla del Monte | Madrid | Spain | |
| Broadcom | 10,000+ | Palo Alto | California | United States | |
| Bugcrowd | 10,000+ | San Francisco | California | United States | |
| Saber Educação | 10,000+ | Sao Paulo | Sao Paulo | Brazil | |
| Staples Canada ULC, Staples Professional Inc. | 10,000+ | Richmond Hill | Ontario | Canada | |
| Les Mills International | 10,000+ | Auckland | Auckland | New Zealand | |
| Tech for Campaigns | 10,000+ | San Francisco | California | United States | |
| Publicis Sapient | 10,000+ | Boston | Massachusetts | United States | |
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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 (49), Technology (40), Marketing (37).
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 20 - 49 employees (583 companies), 0 - 9 employees (575 companies), 100 - 249 employees (416 companies).
Employee Size
Customer.io Customers by Geography
The top three geographies of Customer.io for email-analytics are the United States with 903(56.30%), Brazil with 209(13.03%), United Kingdom with 137(8.54%) customers respectively.
Customers
Employees of Customer.io
Also see other Products/Services by Customer.io in:
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.
What is Customer.io customer distribution based on company size?
What is Customer.io market share in the email-analytics?
What are the top countries that use Customer.io?
What are the top industries that use Customer.io?
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