Customer.io

Review of Customer.io Software: system overview, features, price and cost information. Get free demos and compare to similar programs.

Overview

About Customer.io

Customer.io is a leading customer engagement platform designed for tech-savvy organizations to create personalized customer journeys that engage, convert, and scale. Use first-party data to send meaningful messages across all channels, including email, in-app, push, SMS, and webhooks. Today, 7500+ brands trust their messaging needs with Customer.io. Customer.io’s suite of products includes Journeys, a messaging automation tool, Data Pipelines, a customer data platform; and Parcel, a code editor designed for email. Founded in 2012, Customer.io is a globally distributed, remote-first company named one of the fastest-growing private companies on the 2023 Inc. 5000 list.

Customer.io Screenshots

Customer.io Features

Features of Customer.io
A/B Testing
Campaign Analytics
Drip Campaigns
Landing Pages/Web Forms
Lead Management
Multi-Channel Marketing
Multivariate Testing
ROI Tracking
Sales Analytics
Segmentation

Customer.io Integrations

Segment logo
Segment
SugarCRM logo
SugarCRM
Stripe logo
Stripe
Stitch logo
Stitch
SparkPost logo
SparkPost
Snowplow BDP logo
Snowplow BDP

Customer Reviews

See why people love Customer.io

5 Star
80%
4 Star
10%
3 Star
10%
2 Star
0%
1 Star
0%
Joana C.

Joana C.

Verified User

Computer Software · 11-50 employees

Used daily for less than 12 months
Dec 22, 2025

Complete feature-set and excellent support

Verified reviewer

What they liked
  • Even though at first it might have a longer learning curve (because there are several functionalities we can make use of), I think it compensates having the ability to create complex workflows for email campaigns: there are several functionalities available, and we're always able to create the flows we ideate
  • I particularly like the “draft” option to test campaigns I've just set up and made live and that we're able to integrate with other data platforms, that enrich our trigger and filter capabilities
  • Excellent customer support
  • Even though we're not on the Premium plan, any of the queries we submit are answered within 24 hours and have detailed explanations or workarounds for the issues presented
  • They also have interesting webinars from time to time, with quite specific topics and tips
Room for improvement
  • Unfortunately, we're unable to move a contact manually within a workflow; which is particularly important for exceptional cases that we might want to override the rules because of a human or sync error
  • Another feature I'd like to have (but also seems to be missing from most similar tools), is the ability to have custom reports – though I wouldn't need this very often, thus it's not a dealbreaker at this point
  • The pricing is somewhat expensive, and we're not able to temporarily downgrade the plan (if by any chance our business has a seasonality)
Why they chose it

"Customer.io had more functionalities and/or better deliverability rate than GetResponse, Sender, Omnisend and Drip. It had also much better support than Sendgrid. It was less expensive than Salesmanago, Mailchimp and ActiveCampaign, though these options seemed also very complete and with excellent support. Mailjet was close when taking the final decision, as it also served well our needs and would be cheaper; that would be most likely our plan B. Finally, Intercom was also considered, but we ended up discarding the option as there was no specific email marketing plan. The functionality is available, but ends up not having a competitive price at all."

Noga M.

Verified User

Financial Services · 11-50 employees

Used weekly for less than 2 years
Dec 22, 2025

Great product, not the cheapest though

The UI/UX was very user friendly and easy to use. You don't need any special training in order to be able to build sophisticated flows.

What they liked
  • As a brand that has both a website and an app, Customer
  • io combined everything we needed to send customer journey messages across various channels: Push, in-app, email, and sms
Room for improvement

The pricing model didn't make sense for our growing company, as you pay for all the contacts in your account, regardless of if they're active or not

Switched From

Klaviyo did not have push and in-app which we needed since we launched an app

Why they chose it

"The offered competitive pricing which fit our startup company"

Suzan N.

Verified User

Retail · 11-50 employees

Used daily for less than 12 months
Dec 22, 2025

Good service, interface somehow difficult and less user friendly than other systems

Good

What they liked
  • Great and quick customer service, broadcast function works well
Room for improvement

The data functions and the somehow difficult interface of campaigns and flow-building

Why they chose it

"Wasn't my personal choice"

Katie S.

Verified User

Leisure, Travel & Tourism · 11-50 employees

Used weekly for free trial
Dec 22, 2025

Powerful and flexible messaging platform for those ready to invest the time

Customer.io is a powerful marketing automation platform. It lets us build data‑driven campaigns across email, SMS, push, and more with fine control and smart triggers. It’s reliable and scalable, though it takes effort to master, and pricing can be steep for newcomers.

What they liked
  • Customer
  • io gives us complete control over messaging, email, SMS, push, in‑app, with smart workflows and segmentation based on real behavior
  • It’s configurable, reliable, and great for personalized customer journeys
Room for improvement
  • The UI can feel overwhelming at first, especially for non‑technical users, searching for past messages or editing templates isn’t intuitive
  • Also, pricing and support has room to improve for smaller teams

Verified Professional

Computer Software · 11-50 employees

Used daily for less than 2 years
Dec 22, 2025

Super easy to setup

Computer Software

What they liked
  • Low cost, good automation and search options
  • UI looks good, and no one on my team needed to look at documentation to use it
  • It was easy for our developers to connect Customer Io into our platform
Room for improvement
  • I feel like Keap does everything they do a bit better in terms of customizing options for a lower price
  • That being said Customer Io does look better and is easier to use
Switched From

MailChimp was great for sending emails with nice templates, but the automation functions were very limiting.

Orian R.

Orian R.

Verified User

Computer & Network Security · 51-200 employees

Used daily for less than 2 years
May 28, 2026

Modern marketing automation platform with powerful data integration capabilities

Verified reviewer

What they liked
  • As a SaaS company, product data integration was a key decision factor when picking our MAP
  • Customer
  • io was by far the best at leveraging product data in emails and became a key part of our workflow to detect and activate leads from Product
Room for improvement

The initial setup was quite complex because of what we wanted to do, but the Customer Success rep was very helpful

Switched From

We wanted to go for a "best of breed" approach and did not need most Hubspot for Marketing capabilities. Also, data integration.

Why they chose it

"Data integration capabilities and a pricing structure that worked with our metrics."

Cagri S.

Cagri S.

Verified User

Transportation/ Trucking/ Railroad · 11-50 employees

Used weekly for less than 2 years
May 28, 2026

Efficient and Comprehensive, but a bit Pricy

We started using Customer.io for behavioral emails and SMS messages. We're gradually moving transactional messages to Customer.io as well.

What they liked
  • Very easy to set up and manage
  • The visual workflow builder, webhooks, integrations, and API are my favorite
Room for improvement
  • It's a bit expensive, especially if you have too many users, since Customer
  • io bills you based on the number of customers available in your account
Switched From

Because OneSignal doesn't have proper email and SMS marketing capabilities.

Why they chose it

"We started using it with the startup program and then loved it!"

Arnaud B.

Arnaud B.

Verified User

Computer Software · 2-10 employees

Used weekly for less than 12 months
May 28, 2026

The best email marketing tool for SaaS but expensive

Verified reviewer

What they liked
  • Customer
  • io is the Klavyo of email marketing sequences but for SaaS businesses in my opinion
  • We had a great experience with the software and it brought us great open rates once you have set up custom domain tracking
  • It's very easy to use as well for how complex the software is
Room for improvement
  • Frankly everything was great except the pricing which is a bit expensive when you're starting out
  • They have a free plan for 6 months but then it's a big jump from free to paid, wish they had an intermediate plan at the time
  • It made us considering other choices
Why they chose it

"I chose Customer.io because it was more adapted to SaaS softwares."

François M.

Verified User

Business Supplies and Equipment · 2-10 employees

Used weekly for less than 12 months
May 28, 2026

One of the best for marketing & communication

I use it to manage email marketing for a multilingual e-commerce site. We have different dedicated areas on customer.io to manage the different languages. We use it mainly to send newsletters, and for the automation system, sending targeted emails to our prospects.

What they liked

Its complete environment, allowing you to perform all your marketing, newsletter and scripting tasks with ease Everything is fluid and clear, making it easy to use

Room for improvement

Perhaps the campaign model is a little more complicated to learn, but on the whole it's a complete and reliable system

Aifton C.

Verified User

Food & Beverages · 51-200 employees

Used daily for less than 12 months
May 28, 2026

8/10 for the software!

Overall very happy. Again it’s very easy to use and segment out. I enjoy the new features being added as well.

What they liked

Easy to learn the platform and schedule new email blasts and segment the sends to different audiences

Room for improvement
  • Lack of options for email design in comparison to other platforms
  • Limited upload size for files
  • No capacity for in email videos

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