Commerce is borderless. Most tech stacks aren’t. 🌍 We’re expanding our interoperability with @Shopify to help merchants easily run one global store while delivering truly local experiences, all synced automatically. Shopify powers the commerce engine. Klaviyo powers the

Our Claude app is out and it’s good, worth checking out.👇🏻 Today for querying data, visualizing and letting frontier LLMs reason about it; very soon for taking action. Stay tuned!

I got a fantastic nerd gift today from our CTO. An original copy of the Google Chrome comic. I like to ask people “Do you know what Firebug is?” Not many of us left who remember the early web dev days and how awesome it was, especially compared to the IE 7 DOM plugin.

Big news! I’m very excited to share that Chano Fernández will be joining me as co-CEO of @klaviyo. I met Chano a few years ago and convinced him to join our board. I've learned a ton from him about scale from his WDAY experiences, and was (and am!) wow’d by his intensity and

I’ve found many too many engineers have never heard of xkcd. My initial reaction is sadness, but then I remember this xkcd and send it to them: https://t.co/dN5ukbUB3r We also use xkcd as coffee table material in our lobby, it’s fun when someone comments on it.

See the whole write up here:

2025 BFCM Weekend Stats: * 22B+ emails, text, push and WhatsApps sent (+25% YoY) * $3.8B KAV — revenue generated from those messages, and now experiences powered by Customer Hub and Customer Agent too (27% YoY) * 42% of all online sales attributed to marketing and service

Stats tomorrow. For tonight, saluting the brands who crushed BFCM with a new banner in our office. And especially the 20,000+ that set new personal bests for single day sales on Black Friday! 🍾

Another fun milestone from Black Friday. Few years ago we challenged ourselves to build our own MTA to get more control over delivery to ISPs and inboxes. (MTA = mail transfer agent, the tech that sends out email, handles deliverability, telemetry, spam / abuse, etc) On Friday,

Black Friday numbers are in. New record, @klaviyo businesses went over $1,000,000,000 in sales attributed to marketing and service through our platform in a single day. That’s the first time we’ve cracked a billion. Congrats on a record Black Friday, great start to the weekend!

One of my favorite examples that AI is democratizing. Every year someone at Klaviyo design the “BFCM turkey” and we vote on the winning design. Usually the winner comes from our creative or product design teams. This year it came from a Klaviyo in rev ops, and it’s awesome.

To all the @klaviyo retailers and brands out there, have a great Thanksgiving and BFCM weekend! 🦃 We’re ready to set some records together and we’re online for whatever help you need. You got this, let’s crush it. 💪��

Go time. Live or stream, time to share what we’ve been cooking.

This sums up our product strategy.

We integrated Google’s new image generation into our image editor. It’s live on all @klaviyo accounts. We’re just watching the edits users (and soon agents) are doing. It’s wild. https://t.co/nl3ArwdvIm We set a goal of live by Friday, mission accomplished.

My new podcast is live: Agents of Scale 🔥 Ep 1: I sat down with @Klaviyo CEO Andrew Bialecki (@abialecki) Listen here: https://t.co/tGi0fvjOtI Andrew scaled Klaviyo to $1M solo. No headcount. No funding. But now he’s rethinking teams, decisions, and leadership itself. Who

The @klaviyo product and eng teams are rolling! Some major new releases at #KLDN25 this week: K:Marketing * New brand campaign builder – all your messages, all channels, all your results in one place. * WhatsApp & RCS as native channels. * Predicted channel affinity (e.g. does

We have a lot of great product updates to share at 4p ET today. See you there! https://t.co/T9Q2PYbgEg.

And as we extend Klaviyo beyond marketing into other areas like customer service, our goal is for every business to has software that knows their customer deeply, can personalize experiences and automatically optimize them over time. You should never have to re-explain your

The original CRM software (invented over 40 years ago!) started as digital versions of our notebooks, or rolodexes if you had one of those. They were great for making that data available everywhere, all the time and sharing it with our peers. They were built for you to look at