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Customer.io

Customer.io

Overview

What is Customer.io?

Customer.io is a customer engagement platform that enables marketers to build sophisticated automated messaging campaigns. With access to real-time behavioral data, users can create personalized and relevant messages to engage and retain customers. This includes sending emails, push notifications, SMS,…

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Learn from top reviewers

Customer.io: Great Overall Tool and Great Bank for Buck

Rating: 10 out of 10
January 21, 2025
IncentivizedVetted ReviewVerified User
Customer.io is used as a core CRM platform in our business. The tool handles multi layered email, SMS, and other types of marketing channel campaigns for a variety of customer...
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Verified user
Professional
Customer.io6 years of experience

Powerful and user-friendly tool!

Rating: 10 out of 10
June 25, 2022
Vetted ReviewVerified User
Customer.io tool is amazing for email marketing. It's very comprehensive, lets you go into a lot of detail, and is also user-friendly. I have used it to handle email marketing...
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Jasmine Reyes
Manager - Marketing
Marketing Manager
Freelance
Customer.io1 year of experience

The Best Email Software You Have Probably Never Heard Of

Rating: 10 out of 10
September 10, 2021
IncentivizedVetted ReviewVerified User
We not only use Customer.io for all of our email and SMS communications, but we also use it as a database of sorts to segment our members. We send a monthly newsletter as well...
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Padraic Ryan
Manager - Information Technology
Community Manager
eCommerceFuel
Customer.io2 years of experience

Customer.io is great

Rating: 9 out of 10
September 11, 2020
IncentivizedVetted ReviewVerified User
We use Customer.io at First (now part of RE/MAX) to manage all of our communications with customers—primarily email and push notifications, but also SMS messages.
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Joel McLean
Manager - Product Management
Growth Product Manager
First.
Customer.io3 years of experience

Wanna advance your email marketing to the next level? Then this is the tool for you!

Rating: 9 out of 10
March 13, 2020
IncentivizedVetted ReviewVerified User
Customer.io is a great tool to get started with getting your marketing to the next level. It keeps the customer base up to date with API connections, and segmentation is made ...
Continue reading
Mike Koolwijk
Consultant - Marketing
Marketing Automation & SEO Specialist
Klantenfabriek.nl
Customer.io1 year of experience
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Pricing

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Entry-level set up fee?

  • Setup fee optional
For the latest information on pricing, visithttp://customer.io/pricing

Offerings

  • Free Trial
  • Free/Freemium Version
  • Premium Consulting/Integration Services

Starting price (does not include set up fee)

  • $100 per month
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Product Demos

Using Product Data to create granular user segments in Customer.io

YouTube

Marketing Automation With Customer io + Next js

YouTube

Customer.io Product Demo

YouTube
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Product Details

What is Customer.io?

Customers are bombarded with messages every day, and most go ignored. Customer.io is a customer engagement platform designed for tech-savvy organizations to create personalized customer journeys that engage, convert, and scale. Fueled by first-party data, teams can manage and tailor their customer messages across all channels, including email, in-app, push, SMS, and webhooks. 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.

Customer.io Features

  • Supported: Data-driven segment builder
  • Supported: Multichannel messaging (Email, Rich Push, SMS, In-App)
  • Supported: Newsletters
  • Supported: Transactional messages
  • Supported: Android, iOS, React Native, and Flutter mobile SDK
  • Supported: Ad audience sync
  • Supported: Visual workflow builder
  • Supported: A/B testing
  • Supported: Multivariate testing
  • Supported: Triggered drip sequences
  • Supported: API
  • Supported: Webhooks
  • Supported: Dashboards
  • Supported: Conversion tracking
  • Supported: Multiple sending workspaces
  • Supported: Role-based permissions
  • Supported: Timezone sending
  • Supported: Multi-language messages

Customer.io Screenshots

Screenshot of data-driven or manual segments that can be created in the no-code builder for recipient lists, campaign triggers, filters, and conversion goals.Screenshot of the code editor for email, that helps navigate code and iterate.Screenshot of account performance, visible at a glance from the Dashboard view.Screenshot of drag and drop messages, time delays, and branches where desired, to build cross-channel campaigns.Screenshot of triggered campaigns based on forms submissions, customer attributes, customer actions, and dates.Screenshot of localization for global audiences. One message can be delivered in multiple languages.

Customer.io Video

Customer.io Integrations

Customer.io Competitors

Customer.io Technical Details

Deployment TypesSoftware as a Service (SaaS), Cloud, or Web-Based
Operating SystemsUnspecified
Mobile ApplicationNo

Frequently Asked Questions

Customer.io is a customer engagement platform that enables marketers to build sophisticated automated messaging campaigns. With access to real-time behavioral data, users can create personalized and relevant messages to engage and retain customers. This includes sending emails, push notifications, SMS, in-app messages, and more through a visual building experience. Built for scale, Customer.io boasts users among over 5,300 companies, sending over 17 billion messages per year.

Customer.io starts at $100.

Iterable, Braze, and Intuit Mailchimp are common alternatives for Customer.io.

The most common users of Customer.io are from Small Businesses (1-50 employees).

Customer.io Customer Size Distribution

Consumers0%
Small Businesses (1-50 employees)73%
Mid-Size Companies (51-500 employees)25%
Enterprises (more than 500 employees)2%
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Comparisons

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Reviews From Top Reviewers

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Companies can't remove reviews or game the system. Here's why
(1-5 of 8)

Customer.io is the (nearly) perfect drip email system

Rating: 8 out of 10
Incentivized
June 23, 2017
SA
Sean Anderson
Director of Operations
MyTime (Internet, 11-50 employees)
Vetted Review
Verified User
Customer.io
1 year of experience
View profile
Use Cases and Deployment Scope
Customer.io was used for our drip email campaigns. A drip email campaign is a bit more complicated than a regular newsletter campaign: drips are an automatic series of emails that go out, and can change based on different behaviors. We used Customer.io ever since they first launched and found their system the easiest and most feature-rich for this type of campaign.

We were able to send out dynamic series based on whether new clients were actively using certain features of our own software -- so we could send the right emails based on behaviors our clients or prospects took using our system. This made our engagements more useful, personalized, and effective.
Pros
  • Drip emails
  • Analytics and reporting
  • Integrations and API access
Cons
  • Reporting could be more customizable -- for example, seeing breakdowns of analytics by cohorts took a little bit of finagling
Likelihood to Recommend
Customer.io is perfect for drip email campaigns, meaning any scenario where you need to send a series of emails to a certain client. Ideal for engaging new prospects, maybe ones on a free trial for your own product, or for upselling clients based on their activity on your own site or their engagement with your own products. Also ideal for onboarding and tutorials/training emails.

It's perfect if you want your email series to change dynamically based on customer engagement: for example, let's say you get a new client and want them to complete 3 key steps to register with you. If they take Step 1, but not Step 2 and 3, you don't want to email them asking to do Step 1. So Customer.io would automatically skip your "Step 1 Email" and move on to Step 2 and 3.

It's also excellent for A/B testing, so you can optimize whatever you're using it for.

Scalability and automation for your emails

Rating: 10 out of 10
Incentivized
February 13, 2019
SV
Santiago Valdés
Cofounder / Marketing, Growth, Technology, Experience
Vestuá (Retail, 11-50 employees)
Vetted Review
Verified User
Customer.io
2 years of experience
View profile
Use Cases and Deployment Scope
We are using Customer.io in the Marketing and Customer Experience departments.

For marketing, we are using it for two things: sending newsletters (massive) and triggered campaigns, that means, based on behavior or attributes of our users.

In the case of customer experience, we use them based on behavior. For example, if someone gives us an NPS of 10, we send them an email thanking and inviting them to share their testimony.

Basically, it solves our email issues with the scalability it provides based on their attributes and events engine.
Pros
  • Managing users, attributes and events. You are easily able to modify any user, based on their ID, and add or remove attributes, assign events to them. That makes it very easy to segment later and to assign them to several campaigns based on behavior. Just a warning: this integration isn't so easy (at least it wasn't for us).
  • Creating workflows of campaigns is very easy. You can quickly create behavioral campaigns based on attributes, segments and add elements to the workflow. You can send an email, then wait, then send another, then exit the campaign if they converted, etc. The workflow is easy to configure and very powerful for automation.
  • We don't use many email templates (we make them in MJML) but it's very easy to add senders, to change templates and in general to test designs.
  • Deliverability works very well, at least for us. It sends emails pretty fast and without issues.
  • Exporting is very quick and easy. Importing wasn't a feature until recently, but it works well too.
  • Seeing activity it's also useful. In general, logs are awesome (be it of a customer, of activity on the site, email sends, etc.).
  • We don't use environments, but it might be very useful for a bigger company.
Cons
  • Data collection is a very weak part of Customer.io.
  • You can't export data. You can't see it in any other way except the one they provide... definitely don't expect to rely only on their data because it's poor and can't be segmented.
  • A/B testing could be better. You could use multivariate tests and you should be able to track which parts of the email you sent are most clicked, and so on.
  • Onboarding isn't easy. Sending pageviews every time with the ID is very useful but not very easy to achieve, at least for a smaller company. Docs help but are extremely technical. I think it would be useful to have a friendlier or even an integration team for smaller/less technical teams.
  • Integrating with other APIs for sending special content. For example, trying to send personalized emails to customers based on previous purchases isn't easy to achieve at all.
Likelihood to Recommend
If you have a very small database of people, then probably the whole integration isn't justified. If you have a small business and don't plan to scale much, don't do it. It will be expensive for what you can get elsewhere (Mailchimp).
If you want a scalable and powerful platform, that will take some time to pay off, and you can wait, then do it. Once you get integrated and start sending events and attributes, the things you can do are almost limitless.

Using Customer.io with Segment - dream come true

Rating: 10 out of 10
Incentivized
August 01, 2017
TB
Ted Bennett
User Engagement
Appcues (Computer Software, 11-50 employees)
Vetted Review
Verified User
Customer.io
1 year of experience
View profile
Use Cases and Deployment Scope
We use Customer.io to automate all our email campaigns. I personally use it to trigger auto-messages for trial users signing up. It's all about urgency and timeliness when replying/messaging a new user and Customer.io allows me to do that hands free and automatic. The tool is addressing the problem of urgency and needing to be always available by allowing us to automate our email messaging.
Pros
  • Integrate with our existing tools
  • Trigger emails based on events
  • Automating our email drip campaigns
  • Time based/triggered emails for new users signing up
Cons
  • I may be missing it in the UI, but a place to see the list of emails who qualify for a certain email.
  • One easy to view chart of all our automated/lifecycle emails to see what a given user would see over their customer journey. (This is really just a feature request/idea - the product itself is really awesome.)
Likelihood to Recommend
A few specific scenarios where Customer.io is well suited would be attempting to scale your email campaigns, personalize and trigger emails based off of events from your system. Companies who use Segment and other third party tools would be well suited as Customer.io integrates super easy with other tools.

Where Customer.io is not as well suited would be an environment where each lead/customer requires a personalized email/attention. Customer.io is designed to help you scale, but if you are just writing one off emails you might like another tool.

The Best Email Software You Have Probably Never Heard Of

Rating: 10 out of 10
Incentivized
September 10, 2021
PR
Padraic Ryan
Community Manager
eCommerceFuel (Internet, 1-10 employees)
Vetted Review
Verified User
Customer.io
2 years of experience
Use Cases and Deployment Scope
We not only use Customer.io for all of our email and SMS communications, but we also use it as a database of sorts to segment our members. We send a monthly newsletter as well as about 50 different flows that are sent to our members based on their activity and involvement.
Pros
  • Customer Segmentation
  • Email Campaigns
  • Email Newsletters
  • A/B Testing
Cons
  • Sorting of Data
Likelihood to Recommend
If you are sending email campaigns or newsletters, I have yet to find a better solution. You can easily tie all of your systems into Customer.io, which makes segmenting your customers based on location, preferences, activity, or any data point you measure.

We are just starting to use SMS and it isn't using a native system but tying into Twilio, so I think you would be better off with a dedicated SMS platform if you are focusing heavily on that channel.

Wanna advance your email marketing to the next level? Then this is the tool for you!

Rating: 9 out of 10
Incentivized
March 13, 2020
MK
Mike Koolwijk
Marketing Automation & SEO Specialist
Klantenfabriek.nl (Marketing & Advertising, 1-10 employees)
Vetted Review
Verified User
Customer.io
1 year of experience
View profile
Use Cases and Deployment Scope
Customer.io is a great tool to get started with getting your marketing to the next level. It keeps the customer base up to date with API connections, and segmentation is made easy. So it's really easy to build flows/drip campaigns to specific groups (automated).
Training customers with this tool is also easy, people who are not tech savvy catch up quick. It's really easy to use and fun to build.
Pros
  • Ease of use, a good tool for non programmers, or not so tech savvy people.
  • Great support, willing to help a lot, by chat, calls, or screen sharing.
  • Fast updates, it's a newer tool, but they are coming with fixes and updates fast.
Cons
  • Better visual automation builder, they are a little behind here.
  • Automate reports, I would love to see this.
Likelihood to Recommend
If you want to run a fast test campaign for let's say a new product, or collect data really fast and turn those in easy segments to communicate in a better way. Then go for it, it's so easy and fast to set up a customer communication stream, that it's also great for testing smaller campaign. Most of the time the hold back would be time + setup to do this. Not with Customer.io.
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