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)
1922
Market Share (Est.)
29.48%
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 12.55%, Movable Ink with 9.59%, RetailRocket with 8.62% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| SmartrMail | 818 | 12.55% | Customer.io vs SmartrMail |
| Movable Ink | 625 | 9.59% | Customer.io vs Movable Ink |
| RetailRocket | 562 | 8.62% | Customer.io vs RetailRocket |
| Blueshift | 484 | 7.42% | Customer.io vs Blueshift |
| TargetBay | 471 | 7.23% | Customer.io vs TargetBay |
| Emma | 385 | 5.91% | Customer.io vs Emma |
| Dialog Insight | 283 | 4.34% | Customer.io vs Dialog Insight |
| WhatCounts | 183 | 2.81% | Customer.io vs WhatCounts |
| Reply | 169 | 2.59% | Customer.io vs Reply |
| Yet Another Mail Merge (YAMM) | 162 | 2.49% | Customer.io vs Yet Another Mail Merge (YAMM) |
| NiftyImages | 126 | 1.93% | Customer.io vs NiftyImages |
| TextExpander | 113 | 1.73% | Customer.io vs TextExpander |
| Sendspark | 63 | 0.97% | Customer.io vs Sendspark |
| Covideo | 31 | 0.48% | Customer.io vs Covideo |
| Gmelius | 22 | 0.34% | Customer.io vs Gmelius |
| CartStack | 17 | 0.26% | Customer.io vs CartStack |
| Traqli | 15 | 0.23% | Customer.io vs Traqli |
| Notifuse | 13 | 0.20% | Customer.io vs Notifuse |
| Strands Retail | 11 | 0.17% | Customer.io vs Strands Retail |
| Parcel | 10 | 0.15% | Customer.io vs Parcel |
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 12.55%, Movable Ink with 9.59%, RetailRocket with 8.62% market share.
Customer.io vs SmartrMail
Customer.io vs Movable Ink
Customer.io vs RetailRocket
Customer.io vs Blueshift
Customer.io vs TargetBay
Customer.io vs Emma
Customer.io vs Dialog Insight
Customer.io vs WhatCounts
Customers of Customer.io
Around the world in 2026, over 1919 companies have started using Customer.io as Email Personalization tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Shopify, Inc. | 10,000+ | Ottawa | Ontario | Canada |     |
| John Cradden | 10,000+ | Dublin | Leinster | Ireland | |
| Broadcom | 10,000+ | Palo Alto | California | United States | |
| SocialPilot | 10,000+ | Lewes | Delaware | United States | |
| Tech for Campaigns | 10,000+ | San Francisco | California | United States | |
| Vinfast | 10,000+ | Haiphong | Hai Phong | Vietnam | |
| BambooHR | 10,000+ | Draper | Utah | United States | |
| Powur, PBC | 10,000+ | Del Mar | California | United States | |
| REMAX | 10,000+ | Denver | Colorado | United States | |
| Piratpartiet | 10,000+ | Stockholm | Stockholm | Sweden | |
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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 Personalization are Saas (48), Technology (39), Marketing (32).
Customers
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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 (588 companies), 20 - 49 employees (541 companies), 100 - 249 employees (358 companies).
Employee Size
Customer.io Customers by Geography
The top three geographies of Customer.io for email-personalization are the United States with 873(56.54%), Brazil with 219(14.18%), United Kingdom with 109(7.06%) 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, Movable Ink, RetailRocket. 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 Movable Ink Customer.io vs RetailRocket.
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?
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