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)
1819
Market Share (Est.)
29.99%
Ranking
#1
Top Competitors and Alternatives of Customer.io
The top three of Customer.io’s competitors in the Email Personalization category are SmartrMail with 12.32%, RetailRocket with 9.04%, Movable Ink with 8.44% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| SmartrMail | 747 | 12.32% | Customer.io vs SmartrMail |
| RetailRocket | 548 | 9.04% | Customer.io vs RetailRocket |
| Movable Ink | 512 | 8.44% | Customer.io vs Movable Ink |
| TargetBay | 491 | 8.10% | Customer.io vs TargetBay |
| SmarterHQ | 376 | 6.20% | Customer.io vs SmarterHQ |
| Blueshift | 363 | 5.99% | Customer.io vs Blueshift |
| Emma | 359 | 5.92% | Customer.io vs Emma |
| Dialog Insight | 203 | 3.35% | Customer.io vs Dialog Insight |
| WhatCounts | 183 | 3.02% | Customer.io vs WhatCounts |
| Reply | 113 | 1.86% | Customer.io vs Reply |
| NiftyImages | 107 | 1.76% | Customer.io vs NiftyImages |
| Yet Another Mail Merge (YAMM) | 91 | 1.50% | Customer.io vs Yet Another Mail Merge (YAMM) |
| TextExpander | 50 | 0.82% | Customer.io vs TextExpander |
| Sendspark | 18 | 0.30% | Customer.io vs Sendspark |
| Traqli | 15 | 0.25% | Customer.io vs Traqli |
| Strands Retail | 11 | 0.18% | Customer.io vs Strands Retail |
| Parcel | 11 | 0.18% | Customer.io vs Parcel |
| Oracle Siebel Email Marketing | 10 | 0.16% | Customer.io vs Oracle Siebel Email Marketing |
| Nova.ai | 8 | 0.13% | Customer.io vs Nova.ai |
| Gmelius | 8 | 0.13% | Customer.io vs Gmelius |
Popular Comparisons
Top Competitors and Alternatives of Customer.io
The top three of Customer.io’s competitors in the Email Personalization category are SmartrMail with 12.32%, RetailRocket with 9.04%, Movable Ink with 8.44% market share.
Customer.io vs SmartrMail
Customer.io vs RetailRocket
Customer.io vs Movable Ink
Customer.io vs TargetBay
Customer.io vs SmarterHQ
Customer.io vs Blueshift
Customer.io vs Emma
Customer.io vs Dialog Insight
Customers of Customer.io
Around the world in 2025, over 1819 companies have started using Customer.io as Email Personalization tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Ciena | 10,000+ | Hanover | Maryland | United States |     |
| Bankinter | 5,000 - 9,999 | Madrid | Madrid | Spain | |
| Suitsupply | 5,000 - 9,999 | Amsterdam | North Holland | Netherlands | |
| Biola University | 5,000 - 9,999 | La Mirada | California | United States | |
| WebstaurantStore | 5,000 - 9,999 | Lancaster | Pennsylvania | United States | |
| SendOutCards | 5,000 - 9,999 | Salt Lake City | Utah | United States | |
| Garanti BBVA | 1,000 - 4,999 | Bucharest | Bucuresti | Romania | |
| EatHappy | 1,000 - 4,999 | Koeln | North Rhine-Westphalia | Germany | |
| Tweed | 1,000 - 4,999 | Smiths Falls | Ontario | Canada | |
| Sharecare | 1,000 - 4,999 | Atlanta | Georgia | 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 Personalization are Saas (41), Technology (35), Fintech (26).
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-personalization category fall in the company size of 0 - 9 employees (547 companies), 20 - 49 employees (518 companies), 100 - 249 employees (251 companies).
Employee Size
Customer.io Customers by Geography
The top three geographies of Customer.io for email-personalization are the United States with 970(62.38%), Brazil with 185(11.90%), United Kingdom with 114(7.33%) 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-personalization category are SmartrMail, RetailRocket, Movable Ink. 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 SmartrMail Customer.io vs RetailRocket Customer.io vs Movable Ink.
What is Customer.io customer distribution based on company size?
What is Customer.io market share in the email-personalization?
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
