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)
1999
Market Share (Est.)
2.41%
Ranking
#3
Top Competitors and Alternatives of Customer.io
The top three of Customer.io’s competitors in the Email Analytics category are Constant Contact with 84.26%, Zoho Campaigns with 7.55%, EveryCloud Email Security with 2.31% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Constant Contact | 69752 | 84.26% | Customer.io vs Constant Contact |
| Zoho Campaigns | 6249 | 7.55% | Customer.io vs Zoho Campaigns |
| EveryCloud Email Security | 1914 | 2.31% | Customer.io vs EveryCloud Email Security |
| Benchmark | 1270 | 1.53% | Customer.io vs Benchmark |
| EmailAnalytics | 717 | 0.87% | Customer.io vs EmailAnalytics |
| Pepipost | 323 | 0.39% | Customer.io vs Pepipost |
| BlueHornet | 284 | 0.34% | Customer.io vs BlueHornet |
| SparkPost | 216 | 0.26% | Customer.io vs SparkPost |
| Dyspatch | 16 | 0.02% | Customer.io vs Dyspatch |
| RebelMail | 12 | 0.01% | Customer.io vs RebelMail |
| G-Lock Analytics | 9 | 0.01% | Customer.io vs G-Lock Analytics |
| Email Aptitude | 7 | 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 84.26%, Zoho Campaigns with 7.55%, EveryCloud Email Security with 2.31% 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 1991 companies have started using Customer.io as Email Analytics tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| SocialPilot | 10,000+ | Lewes | Delaware | United States |     |
| Tech for Campaigns | 10,000+ | San Francisco | California | United States | |
| Macpherson Records | 10,000+ | Barcelona | Catalonia | Spain | |
| PlanHub | 10,000+ | Montreal | Quebec | Canada | |
| SendOutCards | 5,000 - 9,999 | Salt Lake City | Utah | United States | |
| Bankinter | 5,000 - 9,999 | Madrid | Madrid | Spain | |
| Ciena | 5,000 - 9,999 | Hanover | Maryland | United States | |
| Sharecare | 1,000 - 4,999 | Franklin | Tennessee | United States | |
| TryHackMe | 1,000 - 4,999 | London | England | United Kingdom | |
| Flutterwave | 1,000 - 4,999 | San Francisco | California | United States | |
Uncover hidden demand and identify accounts ready to buy with 6sense Intent Data.
Customer.io Customers by Products and Services
The top three products and services offering customers that use Customer.io for Email Analytics are Saas (50), Technology (41), Marketing (37).
Customers
Download the 6sense Chrome Extension to get verified contact data of Customer.io employees
Install Now
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 (591 companies), 0 - 9 employees (576 companies), 100 - 249 employees (417 companies).
Employee Size
Customer.io Customers by Geography
The top three geographies of Customer.io for email-analytics are the United States with 903(55.88%), Brazil with 217(13.43%), United Kingdom with 135(8.35%) 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?
Get everything in one place
Close deals faster by understanding your clients well. Know their technology stack, contract renewal date, top decision-makers, hiring trends, and top company news in one place.
Get a demoGet instant access to B2B contact data across the web
Sign Up Today
