Build long-lasting relationships
Send campaigns, newsletters, and transactional emails that resonate with your audience.
- 14-day free trial
- No credit card required
- Cancel anytime
Content that converts
Craft compelling emails that seamlessly blend text and imagery, unlocking unique engagement possibilities.
Drag-and-drop email builder
Allow non-technical marketers to move quickly with email content creation needs in a familiar and intuitive drag-and-drop environment.
Code from scratch
Gain granular control over your email content with our robust HTML code builder powered by Parcel. Develop effective and scalable email design systems that your team can trust.
Control is at your fingertips
Automated, on-time delivery
Leverage campaigns to create automated email touchpoints that build relationships on your behalf. Whether a single email or a series, let automation take the wheel so you can focus on other parts of your business.
Evergreen and predictable messaging
Maintain a consistent presence in your subscriber's inbox with regular broadcasts and keep your messaging timely and relevant, whether it's a one-time product update or an API-triggered alert.
Optimally timed, perfectly positioned
Ensure precise timing and strategic placement of your automated touchpoints and broadcasts. Customize time delays, sending constraints, and wait until qualifications to deliver content when your audience is most likely to engage.
Advanced segmentation
Avoid sending batch and blast campaigns when you can deliver personalized messages at scale.
Group your users into segments or trigger messaging based on critical moments in your customer's lifecycle using events.
Personalize messaging with key data points such as the recipient’s first name, upcoming dates, or alternate attributes.
Display dynamic content based on a subscriber's relationship to an object.
Metrics that matter
Don’t get bogged down with meaningless data—Customer.io surfaces metrics that help you better understand your audience.
Understand how your content performs once it lands in your subscriber's inbox with email engagement data like open and click-through rates.
Assign conversion events to track the downstream impact of your email campaigns.
Clearly understand your delivery status to uncover what might prevent your emails from reaching the inbox.
Analyze email client breakdown across popular inboxes like Gmail, Yahoo, or Hotmail to enhance your content with Parcel Analytics.
Email features
Drag-and-drop editor
Quickly build campaigns in a familiar interface
Code editor
Craft unique emails with HTML and CSS
Accessibility checker
Review the accessibility of your emails
Dynamic content
Personalize messages with Liquid using attributes
AMP for email
Create interactive, dynamic emails
Forced dark mode
Emulate dark mode to understand your email's impact
Screenshots
Capture and share email design screenshots with stakeholders
Link validation
Ensure all links are working and going to the right pages
Image validation
Check that all your images are loading, secure, and optimized
Problem checker
Identify and resolve HTML and CSS issues
A/B testing
Optimize messages and monitor performance
Multi-language
Manage message localization preferences
Subscription center
Store user preferences for targeted emails
Conversion events
Track key engagement milestones
Campaigns
Create robust automations with the visual workflow builder
Broadcasts
Send one-off newsletters and API-triggered messages
IPs
Dedicated for Premium and Enterprise plans
Custom SMTP
Set up a custom email sending and internet protocols
Bounce reporting
In-depth bounce reports for deliverability troubleshooting
Deliverability monitoring
A dedicated team to help uncover and resolve any issues
Master email marketing
Explore best practices, expert tips, and guides or an effective email marketing strategy.
Want to become a deliverability expert?
Principles and practices you need to create HTML emails
Learn intermediate and advanced Liquid
6 lifecycle email examples to elevate engagement
Email inspiration guide from industry-leading brands
Email dark mode best practices and examples
Preferred by product-led companies
The appeal of Customer.io is that it makes our lives so much easier. We were using a ton of different tools before and now with Customer.io, we don’t have to spend hours configuring different emails. We can drag and drop, easily make campaigns, and all of our emails live in one centralized place where we can have anyone on our team access and configure campaigns and broadcasts.
At the end of the day, we’re trying to deliver exactly what the customer wants. By using event conversions and segments, we’re giving them what they need and what they expect to get.
Customer.io has been really great because we’ve been able to automatically set up when a campaign goes out based on our specific user's timezone, giving us the highest opportunity for success.
Using Customer.io has boosted our numbers in every imaginable way—from audience growth to engagement to conversion. They are literally helping us change lives around with world.
Supercharge your messaging automation
- 14-day free trial
- No credit card required
- Cancel anytime