Customer engagement platform for tech-savvy marketers—email, push, in-app, and SMS: automated and powered by your data. Contact [email protected] for support.

The World
Joined October 2011
Customer.io retweeted
We're pushing hard at @CustomerIO because there's a window to become part of the tech stack the next generation of companies builds on. I want that for us. Today, 15–20 AI companies whose names you’d know use Customer.io, including the one we closed today. That number is growing. Serving companies growing this fast requires both scale and speed. 14 years in business have given us scale. And the last 2 years have been a grind to re-accelerate our team to the pace of an earlier stage. I'm proud of the team and am determined to keep building.
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Customer.io retweeted
How it's going: New @CustomerIO plugin just dropped for @cursor_ai and @bot
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Customer.io retweeted
Replying to @CustomerIO
@CustomerIO ya'll have cooked with the agent, I'm more inclined to using the tool because of it. thanks guys
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Customer.io retweeted
Let’s go build.
💥 Announcing Lenny’s Jobs: The best place in the world to find, vet, and land your dream job I’ve spent thousands of hours on my newsletter and podcast sharing advice on how to get better at your work. But all that advice doesn’t mean much if you don’t actually have a job—or one you’re excited about. Over the past six months, I’ve been thinking long and hard about what more I can do to help people who are struggling to find a job they love. Today I’m excited to announce the launch of LennysJobs.com—the best place in the world to find, vet, and land your dream job. What makes Lenny’s Jobs unique and awesome: 1. A laser focus on four builder roles at tech companies: product management, engineering, design, and growth/marketing. We focus exclusively on these roles because they’re what my readers are looking for—and because these roles are starting to meld together. We aggregate open roles from top startups and big tech companies, and unlike any other job directory, we vet every company we include and filter out ghost roles and generic staffing-agency posts. This is the highest-quality directory of open tech roles you’ll find anywhere.
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Customer.io retweeted
Just a massive update to make creating in @customerio Design Studio way easier for humans. More updates for agents on the way.
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Customer.io retweeted
Like all startups, we have replaced a few of our software vendors with claude-coded projects. But other vendors are using AI so much to improve their products so quickly that they're not worth replacing. @CustomerIO is at the top of that list. Seems like the right roadmap for all the software products, sends the right signal.
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Customer.io retweeted
Of course @bot works amazingly well with @customerio. Just ask it to connect to our MCP. I also logged in in the built in browser to test that (works well too). I had it port a bunch of emails to design studio and fix the branding on my fake company, skycouchanddinner.
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Customer.io retweeted
We built a simplified, agentic version of @customerio that you can sign up for without even using a browser. Send email, push, or in-app messages. I'd love to get the team working on this great feedback so if you're building and willing to give feedback, I'll drop $100 in credit (send 400,000 messages) which doesn't expire in your account. customer.io/builders DM me with what you're building and I'll hook you up.
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Customer.io retweeted
Here we go! New summer release dropped. I gave Fable access to a @figma file and a @NotionHQ write-up and asked it for an up to 60 second video. The prompt was super simple. Of course we did a more produced video as well than this one I did at midnight last night.
Just tried this. It worked really well. Will post it tomorrow when we have something to launch.
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Customer.io retweeted
Live today: stripe projects add customer.io/workspace ICYMI, you can use @CustomerIO fully agentically via our CLI / MCP. It's a slick experience.
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Customer.io retweeted
Everyone is saying “it’s the harness, not the model.” But...no one is really explaining what that means. I wanted to understand harness engineering better, so on today's episode of How I AI, I built my own: a custom harness using @ClaudeDevs SDK to triage @sentry bugs, verify root cause, and ship fixes. The big unlock? Realizing a custom harness lets you stop micromanaging chats and get agents that do exactly what you want. Full tutorial now on YT: youtu.be/ofS-4RRw9zw
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Never thought I'd end up playing space invaders instead of working on a product newsletter but here we are... it was actually a nice little interruption thanks @CustomerIO @alphacolin 😁
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Customer.io retweeted
We've just added a new @CustomerIO API integration to our Emailify Figma Plugin! 🎉 Now you can automatically upload your custom HTML email designs directly from #Figma into your CustomerIO account's email templates with one click 📨🚀
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Jon Miller (Marketo's co-founder) is now openly competing with Marketo. On the Ops Cast podcast in March 2026, he said the quiet part out loud: "Marketo and HubSpot are 20 years old. Eloqua is 25 years old. Pardot is 18 years old... they aren't evolving for the [AI] era." And on Adobe's stewardship of Marketo: "Then Adobe acquires it, and the most senior person at Marketo is a director of product marketing... you treat this thing like a cash cow." When the person who invented the category announces a stealth startup positioned as "an alternative replacement to the legacy vendors, including Marketo" — that's the narrative shift. The legacy MAP era is over. We synthesized what practitioners are actually saying about Marketo, HubSpot, Pardot, Customer.io, ActiveCampaign, Eloqua, and more: intel.42agency.com/map-senti…
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Customer.io retweeted
Message Invaders minigame in @CustomerIO
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Customer.io retweeted
11/ We're running a live walk-through on April 16. Come see the AI Agent building campaigns in real time and get your questions answered live: try.customer.io/webinars/meg…
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Customer.io retweeted
Today is the biggest product launch in @customerio history. We built a new way of working so every message reaches further, every campaign gets smarter, and you can see what's actually driving impact. Here's an overview of everything new on the platform today. 🧵 1/11
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