K:AI is Klaviyo’s suite of AI tools. It resolves the question of how to use AI with Klaviyo, with tools for writing emails in your tone of voice, responding to customer queries, and optimizing campaigns using 40+ backend automations. Yet most exciting for email strategists is its Claude integration. With access to all your Klaviyo data, this turns Claude into an expert email marketing assistant and means you can build apps that expand on what Klaviyo K:AI has to offer.
Klaviyo has been quietly building out its AI capabilities for years. Most users are already familiar with its send time optimisation, predictive analytics and email writing tools. But with K:AI, Klaviyo is staking its claim to being the most AI enabled ESP. Klaviyo K:AI includes 40+ AI features.
Yet for most email marketers already using Claude, the most promising feature is Claude integration. With this little feature, which has received little fanfare, you can turn Claude into an email marketing assistant who answers your questions, completes tasks and guides you in continuously improving performance, month after month.
In this article, I’m going to cover what tools Klaviyo’s AI currently offers, how the Claude connection allows you to expand on those tools and three reasons to appoint Claude Code as your marketing assistant, rather than the standard Claude.
What is Klaviyo K:AI Best For?
Klaviyo brands its AI suite as K:AI. It’s a significant offering with more than 40 predictive and generative features built into the platform:
Composer: Klaviyo’s campaign creation tool. Give it a goal or a brief and it builds complete, structured email and text campaigns and flows through conversation. It draws on your brand voice, subscriber data, product catalogue and historical performance to write emails.
Brand Voice AI: Klaviyo’s tool for maintaining a consistent tone across your emails. It learns from your past sends and applies those patterns to new campaigns. It’s a useful baseline, but it’s limited. And tone of voice is just one area where Claude Code can improve on what Klaviyo K:AI offers.
Marketing Agent: Positioned as an AI strategist built into Klaviyo. It surfaces marketing insights from your performance data, creates campaigns from conversational prompts and acts on your behalf across workflows.
Customer Agent: AI for customer interactions. It handles order tracking, returns, loyalty queries and product questions across 113 languages, 24/7. Perhaps less directly relevant for ecommerce email strategists, yet it’s a significant upgrade for businesses having to respond to hundreds of email queries daily.
Predictive and generative features: Klaviyo K:AI has 40+ tools that run in the background performing tasks like predicting customer lifetime value, churn risk scoring, send time personalisation, channel affinity routing, product recommendations and segment optimisation. Most Klaviyo users may have been using these tools without realizing they were there.
With this assortment of AI features, Klaviyo is now far and away the ESP that’s embraced AI the most. They’re committed to automating the user experience as possible, and perhaps eliminating the need for email marketing agencies altogether.
This is why it’s vital for email marketing strategists and copywriters to find ways to enhance whatever AI tools ESPs offer. In this instance, that opportunity is how brands can harness Claude Code as an email marketing assistant that’s constantly learning and can improve on the AI tools Klaviyo K:AI offers.
The Best Part of Klaviyo K:AI: Connecting Claude to Your Klaviyo Account
The Claude integration lets you access your Klaviyo data inside Claude conversations. This allows you to ask Claude questions about your campaigns, ask it to analyse your flows or to offer recommendations based on your account data, all without leaving the Claude interface.
For example, you could ask Claude complex questions like, “Why is my abandoned cart flow performing worse than last month?” Claude will then aggregate all your Klaviyo data from your emails, engagement signals, and website data before answering in plain English. You can then ask Claude what it recommends to improve your abandoned cart performance.
For day-to-day queries and one-off analysis, the standard Klaviyo Claude app is sufficient for interacting with Klaviyo like you would with a marketing assistant. Yet the real power is found when you use Claude Code instead.
The Klaviyo Integration Turns Claude Code Into an Email Marketing Machine
Standard Claude is like having a marketing assistant with the memory of a goldfish. Every new session starts from scratch.
Claude doesn’t remember your origin story, your products, which types of subject lines work best, what language your customers use and what differentiates you from the competition.
Whereas Claude Code offers two unique advantages that make it the perfect platform for creating an email marketing machine:
1. Claude Code gets better the more data you feed it
Claude Code remembers.
Every report Claude Code generates gets saved to your project. Every subject line pattern that outperformed the baseline, every automation it wrote for you, every performance report it’s generated, gets stored. And the more data Claude Code stores, the better it gets.
2. Claude Code lets you build apps that enhance Klaviyo K:AI’s toolset
Tell Claude Code what problem you’re trying to solve, or functionality you need, and it will build an app for you.
Claude Code’s apps are known as “Skills.”
Skills are frameworks that run workflows in response to simple commands. They run these Skills based on your data, carry their context across every session and improve over time.
This means you can build Skills that enhance and expand on what Klaviyo K:AI offers already. Or if you wish to switch to an ESP with lower monthly fees, you can replicate everything Klaviyo K:AI does without losing your performance data.
Think of the Klaviyo Claude app as a useful way to query your data.
Whereas Claude Code lets you build an entire email marketing machine — a machine that operates above Klaviyo K:AI or can run your entire email strategy on its own.
Key takeaway: Klaviyo’s K:AI works within its own platform, drawing on the data Klaviyo holds to write emails, share insights and create campaigns. Claude Code pulls in your data from Klaviyo so you can ask it to perform analyses and complete tasks like with an email marketing assistant. And with its ability to create apps, in the form of Skills, Claude Code allows you to build an entire marketing machine that enhances and expands on what Klaviyo K:AI offers.
5 Ways to Improve Klaviyo K:AI with Claude Code
Here are the five Skills you can build with Claude Code that expand on what Klaviyo AI already offers:
Skill 1: Enhanced Voice Skill
Klaviyo’s Brand Voice AI captures your tone from existing content and you can give it manual instructions, like your brand guidelines. Klaviyo’s AI writer is good for pumping out short, promotional style emails. But due to compliance guardrails, Klaviyo’s emails have a generic “ecom” brand tone no matter how much you manually edit its Voice AI. They’re technically correct and inoffensive. But lack the personality you need for newsletters and longer form emails.
Claude Sonnet has long been regarded as the world’s best AI writer. It understands the principles of storytelling, emotional resonance and nuanced, human-like writing. When fed examples of your emails and your tone of voice guidelines, Claude does a much better job of mimicking your writing style and the structure of your emails.
What’s more, Claude Code’s Tone of Voice Skill continues to improve across every session. It becomes fine tuned as you identify what’s working, or adjusted when it keeps repeating words and patterns you’d rather it didn’t.
For the prompts that work well with a Claude Code Voice Skill, see this guide: 5 best email marketing prompts for e-commerce.
Skill 2: Monthly Calendar Planner Skill
Klaviyo’s Marketing Agent can create campaigns from prompts. What it can’t do is analyse your full campaign history, identify the angles that drove the most revenue, cross-reference with your seasonal data and build a strategic monthly calendar that improves on what you did last month.
Producing a monthly calendar based on your past data is exactly what a Calendar Planner Skill built with Claude Code can do.
Claude Code’s Calendar Skill can identify what products to promote, what subject lines to use, what angles to run based on past performance and even draft all the emails for you. The result is a calendar produced in minutes and based on real data, rather than hours of manual planning and guesswork.
The best part is the Calendar Skill improves every month. Because every month means more data. And more data for Claude Code means more accurate recommendations on the best campaigns to send each month.
Skill 3: Multiplatform Segmentation Skill
Klaviyo’s segment optimization AI makes recommendations based on what Klaviyo can see: purchase history, email engagement, predicted CLV and churn risk within the platform.
What Klaviyo’s AI can’t see is your wider business context. Which products have higher margins, which customer cohorts behave differently outside the email channel on other platforms, like Facebook. In other words, Klaviyo can’t identify which segments are worth prioritising for reasons that aren’t visible in its engagement data.
Through an MCP connection (introduced by Anthropic), Claude Code solves this “walled garden” problem.
A Segmentation Skill built with Claude Code can layer the extra business context on top of Klaviyo’s recommendations. It can simultaneously query Klaviyo (for email engagement), your CRM (for sales rep notes or B2B lead scoring), your ERP/Shopify (for real-time product margins) and Meta Ads (for ad interaction).
Because Claude is a general-purpose reasoning engine, it understands complex business logic. This means you can ask it far more sophisticated segmentation questions than you can in Klaviyo e.g. “Find customers who have a high churn risk in Klaviyo, but only include those who originally acquired via Facebook Ads, and whose past purchases had a gross margin of over 40%.”
With its MCP connection and reasoning ability, Claude can formulate highly specific segments and push them back into Klaviyo (or Meta, or your CRM) as a custom audience for targeted campaigns.
Data Compliance Warning: Before connecting Claude Code to your Klaviyo account or uploading any customer data, check with your legal and compliance team. There are strict rules about sharing customer data with large language models. Without the right agreements in place, connecting customer data to an external AI tool poses compliance risks.
Skill 4: Performance Reports Skill
Klaviyo’s analytics dashboard shows you the headline numbers: click rates, revenue by flow, automation performance. Most ecommerce brands look at those numbers after each campaign cycle and move on.
A Performance Reports Skill you build in Claude Code can import your Klaviyo campaign and automation data. It can then identify patterns across multiple sets of data and produce a report you’d struggle to get from a world-class data analyst.
You can structure Claude Code’s Performance Reports however you like. And get insights such as which subject line structures are consistently outperforming and why, which automation step is losing the most subscribers, which segments are generating outsized revenue per send and aren’t being treated differently.
Even better, Claude Code’s reports can provide you with a ranked list of actionable steps to implement. This allows you to continuously improve performance month after month.
Most ecommerce brands don’t know how to use their Klaviyo data to improve their results. Building a Performance Reports Skill in Claude Code tells you exactly what you need to do.
5. Cross-Channel Insights Skill
This is similar to the Sophisticated Segmentation Skill, yet is such a powerful upgrade to what Klaviyo K:AI can do it’s worth highlighting twice. Because every Klaviyo AI tool, including K:AI and the Marketing Agent, only sees data inside Klaviyo. This limits its recommendations to what it sees inside Klaviyo.
Claude Code is a reasoning engine that can pull in data from several sources at once. Along with your Klaviyo data, Claude Code can pull in data from your CRM pipeline and your ad platform. That makes it possible to surface patterns, trends and connections Klaviyo can’t see.
While Klaviyo can sync Facebook audience lists for targeted ads, it doesn’t have the reasoning ability to connect that with your Klaviyo sends. For example, Claude Code can identify if your “trial-to-paid Facebook ad conversion dropped the same week your welcome sequence click rate fell” or that “your highest-CLV customers came through one specific paid acquisition channel.”
For brands making decisions about where to invest and which channels are actually driving long-term retention, Claude Code’s cross-channel reasoning is a strategically significant advantage Claude Code offers over anything inside the K:AI suite.
Klaviyo K:AI and Claude Code as a Combined System
With its ability to create Skills, there are many ways Claude Code can enhance and expand on Klaviyo’s K:AI suite. However the two platforms aren’t competing. They’re working at different layers.
Klaviyo’s K:AI can handle tasks within Klaviyo. This includes send time optimisation, predictive CLV and generative features inside the email builder, like product recommendations. These are things Klaviyo does well because they run on data it holds.
Claude Code operates a layer above.
Claude Code’s reasoning abilities allow you to analyze your data and manage your Klaviyo account to a higher level of sophistication than you can with K:AI. You can write emails in different tones of voice, Claude Code can create your monthly calendar, build entire automations based on a simple template, and create more sophisticated segmentation logic that draws on your entire business context, beyond what’s stored in Klaviyo.
Klaviyo’s K:AI makes your sends smarter inside the platform. Claude Code makes your strategy smarter, sitting above it.
For a broader view of all the roles AI can play in your ecommerce email program, I’ve created a full breakdown here: how to use AI for ecommerce email marketing.
| If you’re interested in implementing Claude Code as an email marketing machine that sits above Klaviyo, or whichever ESP you’re using, get in touch to request a FREE audit of your email marketing strategy: Email Marketing Strategist Service |
Frequently Asked Questions
Is Claude Code better than Klaviyo’s built-in AI features for ecommerce email marketing?
They do different jobs. Klaviyo’s K:AI is excellent within the platform: send time personalisation, predictive CLV, product recommendations and segment optimisation all draw on data Klaviyo already holds about your subscribers. Claude Code works above that layer: it applies business context Klaviyo can’t see, builds persistent Skills for your program and produces the kind of strategic analysis Klaviyo’s dashboard doesn’t offer. Using Klaviyo AI with Claude Code gives you both, which is the approach the best-performing ecommerce brands are now taking.
Can I use the Klaviyo Claude app instead of building Skills with Claude Code?
The Klaviyo Claude app lets you query your Klaviyo data inside Claude conversations, useful for one-off analysis, quick questions about campaign performance or getting recommendations without switching tools. Claude Code goes further by building persistent Skills: your tone of voice framework, calendar planner and performance reports run every time, improve over time and don’t need re-briefing from scratch each session. The app is a good starting point. Claude Code is the upgrade once you want results that compound.
Do I need technical skills to use Claude Code with Klaviyo AI?
Building the Skills described in this article, tone of voice, calendar planning, segmentation and performance reports, is mostly conversational. You brief Claude Code on what you want the Skill to do, it builds it, and you refine it from there. The MCP server connection between Klaviyo and Claude Code requires some initial technical setup, or help from someone comfortable with API connections. Once that layer is in place, using the Skills day to day doesn’t need technical knowledge.
How is a Tone of Voice Skill different from just feeding Claude your past emails?
Feeding Claude your past emails gives it examples to pattern-match against. It extracts what it can, but it inherits your inconsistencies along with your best work, and the learning disappears when the session ends. A Tone of Voice Skill documents the principles directly: the vocabulary to use and avoid, the emotional register for different email types, your customer’s specific language, what makes your brand distinct. You control exactly what goes in. You refine it over time. And it’s available in every session without re-briefing. It’s the difference between showing Claude some examples and giving it a documented system to follow.
