logo
Search for anything...
About

Customer.io vs Flodesk - Comparison 2025

Customer.io vs. Flodesk

Last updated on

Reviewed by Steph Leung

Stackfix Product & Operations Lead

SL

Customer.io and Flodesk serve distinctly different segments of the email marketing market. Customer.io is the superior choice for technical, data-driven teams needing sophisticated multi-channel marketing automation and complex data integration capabilities. Its powerful segmentation and customization options make it ideal for larger organizations with technical resources.

However, Flodesk emerges as the better option for small businesses and creative professionals prioritizing visual appeal and ease of use. With its stunning email templates and intuitive interface, it's perfect for those who need to quickly launch beautiful email marketing campaigns without technical expertise.

Customer.io Product Logo

Advantages of Customer.io

Customer.io is significantly more powerful at omni-channel marketing automation than Flodesk
While Flodesk is limited to email campaigns, Customer.io enables sophisticated multi-channel engagement across email, SMS, push notifications, Slack, and in-app messaging. This is crucial for businesses needing to reach customers through multiple touchpoints and create cohesive cross-channel experiences.
Customer.io offers far superior data integration capabilities compared to Flodesk
Unlike Flodesk's basic integration options, Customer.io provides robust API and native integrations with major platforms, allowing real-time data sync from multiple sources. This makes it ideal for technical teams needing to leverage customer data from various touchpoints for targeted marketing.
Customer.io enables much more sophisticated segmentation than Flodesk
While Flodesk only offers basic segmentation based on subscriber status and source, Customer.io allows complex segmentation using any customer data point, behavioral triggers, and custom events. This is essential for businesses requiring precise audience targeting.
Flodesk Product Logo

Advantages of Flodesk

Flodesk offers significantly better email design capabilities than Customer.io
Unlike Customer.io's dated and limited email builder, Flodesk provides stunning, modern email templates and an intuitive drag-and-drop editor. This makes it perfect for businesses prioritizing visual appeal in their email marketing.
Flodesk is far easier to set up and use than Customer.io
While Customer.io requires technical expertise and significant setup time, Flodesk offers immediate value with its intuitive interface and quick setup process. This makes it ideal for small businesses and non-technical users needing to launch email marketing quickly.
Flodesk provides superior form creation capabilities compared to Customer.io
Unlike Customer.io's reliance on third-party integrations, Flodesk offers native, visually appealing form creation with multiple format options including pop-up, inline, and full-page forms. This is valuable for businesses focusing on lead capture and list growth.

Customer.io is best for

  • Businesses with high email volume (10k-50k emails per month) who have technical teams
  • Who need to create sophisticated, real-time personalized messaging across email, SMS, push notifications, and in-app messages
  • And/or who want to leverage real-time customer data from multiple sources for targeted automation

Flodesk is best for

  • Small ecommerce businesses seeking beautiful, user-friendly email marketing
  • With a low email volume (1k-5k emails per month)
  • Who need visually stunning email templates and an intuitive drag-and-drop builder for creating professional-looking campaigns
  • And/or who want simple email automation workflows with basic segmentation for ecommerce marketing

Customer.io is less good for

  • Businesses with a low email volume (1k-5k emails per month)
  • Who need traditional marketing features like landing pages, website building, and signup forms
  • And/or who want an intuitive drag-and-drop email builder with modern templates and responsive design

Flodesk is less good for

  • Businesses with high email volume needing advanced segmentation and custom analytics
  • With a high email volume (10k-50k emails per month)
  • Who need sophisticated segmentation capabilities and need to filter contacts based on custom field values
  • And/or who want advanced marketing automation features and need A/B testing, custom dashboards, or omnichannel capabilities

Gallery

Customer.io logoCustomer.io
Customer.io screenshot
Flodesk logoFlodesk
Flodesk screenshot

Pricing, features & ratings

Customer.io logo

Customer.io

Starting at

$100

Billed monthly

Pricing calculatorVisit Website
Flodesk logo

Flodesk

Starting at

$0

Billed monthly

Pricing calculatorVisit Website
Stackfix Verdict
Functionality
6

Functionality

6/10

<p>Customer.io focuses on delivering functionality that enhance customer engagement through highly personalised, data-driven messaging across multiple channels. It offers excellent, granular segmentation and flexible automation workflows across a wide range of channels. However, this means that compared to other Marketing Automation Platforms, Customer.io lacks some common functionality, e.g. creating landing pages, websites and signup forms.</p>
5

Functionality

5/10

<p><span style="background-color: transparent; color: rgb(0, 0, 0);">For small ecommerce businesses, Flodesk’s features are just right. The team has clearly chosen to focus on certain things and do them well.</span></p><p><span style="background-color: transparent; color: rgb(0, 0, 0);">We are concerned that custom fields can only take values of ‘string’ data type, so you can’t validate entries to, say, date or location type fields. Nor can you filter / segment according to the value of custom fields.</span></p><p><span style="background-color: transparent; color: rgb(0, 0, 0);">As your needs grow and you want A/B testing, custom dashboards etc, you may outgrow the platform but it is solid for what it is.</span></p>
Ease of Use
2

Ease of Use

2/10

<p>Customer.io is designed for technical, data-driven teams.The emphasis on technical integrations and real-time data makes it more complex than many other marketing automation tools. To fully unlock Customer.io's power, you'll nede the technical expertise to manage data integrations, create advanced workflows, set up custom events and more.</p>
10

Ease of Use

10/10

<p><span style="color: rgb(0, 0, 0); background-color: transparent;">Flodesk is one of the user-friendly email marketing platforms we have tested. With a simple interface and just 6 clearly labeled tabs, it's super easy to navigate between designing emails, creating forms and building out workflows. We particularly like its workflow builder, which makes it straightforward even for complete beginners to build an email series without guidance.</span></p>
Look and feel
5

Look and feel

5/10

<p>We find Customer.io's interface visually acceptable, but largely just functional. The design's not fully responsive i.e. text escapes containers when browser window is shrunk. We also found page loads to be rather slow (e.g. 3-5 seconds), which quickly becomes painful.</p>
9

Look and feel

9/10

<p>Flodesk offers a delightfully pleasant, modern, uncluttered interface that is straightforward to navigate. In addition, page load times were incredibly fast.</p>
Customisability
8

Customisability

8/10

<p>Customer.io offers a high level of customisability in allowing you to tailor messaging campaigns extensively based on any data you bring in. You can create complex workflows with conditional logic, customize messages using dynamic content, and design personalized customer journeys based on detailed segmentation. However, note that this level of customisability can only be unlocked with technical expertise. Without code, Customer.io only offers a average/ below average level of customisability, especially in designing client-facing emails.</p>
4

Customisability

4/10

<p>There's a classic trade-off between ease of set-up and customisability. No surprises that there is little to customise with Flodesk. That should not be an issue for small businesses looking to grow via email automation. The time may come when you wish to have more control over custom dashboards and analytics but until then we are not concerned.</p>
Ease of Setup
2

Ease of Setup

2/10

<p>Given that Customer.io's focus on data-driven campaigns, there's a steep learning curve when it comes to setup.</p><p><br></p><p>In particular, basic setup can take more than an hour, and fully customising data panels and real-time data can take weeks.</p>
10

Ease of Setup

10/10

<p><span style="color: rgb(0, 0, 0);">We loved how quickly we could self-serve to create an account with very few clicks (via a Google account) and start creating emails, forms and workflows. Thanks to the 'forever free' tier, there is also no need to enter payment card details to access full functionality for the first 30 days.</span></p>
Customer Support
7

Customer Support

7/10

<p>For personalised Q&amp;A, you can submit a support request via Customer.io's platform (after getting past a somewhat unhelpful AI chatbot). We found the support team to be quick to reply (within 2 business hours), helpful and friendly. Their help centre is also of decent quality, with detailed guides and video walkthroughs.</p>
8

Customer Support

8/10

<p>There is no live-chat functionality but our email query was helpfully answered in just 8 minutes. In addition the knowledge base of 'how to' articles is high-quality and easily searchable.</p>
Integratability
9

Integratability

9/10

<p>Customer.io excels in integratability, providing robust options to connect with various data sources and tools. It has excellent integrations with all of the most popular data sources and third-party applications, such as analytics, sales and content management tools. It also has a comprehensive APIs that supports custom integrations, allowing you to easily bring in real-time data from your own databases, data warehouses, websites, and applications.</p>
3

Integratability

3/10

<p>Direct integration is supported only for Instagram and Shopify. The Zapier store has a number of other integrations which may be useful and depending on your needs, you may have to create your own private connection via the Flodesk API.</p>
Ease of Migration
9

Ease of Migration

9/10

<p>Key data (e.g. users, objects) can be easily exported to CSV format via self-serve. Customer.io is also designed to facilitate export customer data to most reasonably relevant third party tools e.g. data warehouse, analytics tools, CRMs via its API and pre-built integrations.</p>
9

Ease of Migration

9/10

<p>In testing we could easily export the mailing list, a specific segment, and analytics (such as daily opt-in and visitor activity) to CSV without needing tech support.</p>
Loading...

Compare other Marketing Automation Platforms

Want to find out how Customer.io or Flodesk stacks up with their competitors?