Skip to main content

Customer.io Blog

Gasp! We’re baring it all and exposing our open rates

Hello Friend, Have you ever been to the beach and there’s that hairy guy with a big gold chain, wearing a speedo and showing just a little too much?  For the faint of heart, turn away now because… …this week’s email is all about open rate data. I’ll show you ours, ask to s…

Writing killer subject lines

Colin Nederkoorn
Hello Friend, Last email I asked you what you wanted us all to learn about next. Here’s a little status update This time: Writing killer subject lines Next time (all going well): Email open rates (based on analysis of our own data) Later: Mapping out the emails your app should send I can’t wait…

Your biggest fears about sending more email

Colin Nederkoorn
This post was originally sent as an email Hello Again, In my last email, I shared how foolish we were for not emailing you sooner. I received this response from Luke B. which helped me know I was on the right track: My opinion of you guys changed completely today. I love the tone, style and…

The dumbest thing customer.io has done to date

This post was originally sent as an email Hello Friend, Believe it or not, when John and I started Customer.io, we were scared to send you email. We thought: “We’ve got one shot at emailing you to check out our product. Let’s make it perfect”. Not communicating with you is the…

How we built our HTML email editor using liquid, wysihtml5 and premailer

Managing email design and content is extremely important to our customers. From day one, we wanted to give our customers full control over the look and feel of their email. Here are our first iterations of email editing in Customer.io. The naive approach We started with a big old text box using A…

The Lean Comedian

I had the pleasure of seeing Aziz Ansari, (an extremely talented comedian) sharpening his tools at the Comedy Cellar. Comedy Cellar is a small comedy club in Greenwich Village, New York City. It fits ~80 people per show in a long, narrow basement venue. The comedians have a narrow, elevated red p…

Don’t use noreply@yourdomain.com on emails

It should be no surprise that if you’re using “noreply@myapp.com” as your email address, you’re leaving information on the table. Here are a few ways you can benefit by using a real email address (and even encouraging people to respond). Users don’t like monologues from machines Sending email fro…

How to build a startup is a solved problem

Steve Blank (entrepreneur, author, teacher) gave a talk yesterday at American Express 1 Steve said something along the lines of: In the past five years, we’ve developed a repeatable process for building startups That’s a big idea. I’m cynical about declarative statements like that. But what if…

4 ways we learned we are building the right thing

After 40+ conversations with people, we know we’re building something of value. Here are some tactics we used to start customer development conversations: Start conversations on twitter I set monitoring for people tweeting “user retention”. I saw Rick Perreault, CEO of Unbounce (check them out) t…

How to pretend you’re always working with email

I like to write and respond to emails at 1:00 am. However, you don’t want to receive an email from me at 1:00 am. If you do receive an email from me, there’s a higher chance you’ll miss it. But for me, writing an email at 1:00 am makes great use of my time. I batch all of my email writing togethe…