What did Klaviyo announce at K:BOS 2026?

What was announced at K:BOS 2026, in one table?

K:BOS is Klaviyo’s annual customer conference in Boston, and the 2026 announcements landed on 9 September. Klaviyo’s own coverage is spread across a press release, a keynote blog post, a takeaways post and a community explainer, and none of them puts status, cost and “should you bother” side by side. As of October 2026, this is where each one stands:

Announcement	Status	Cost	Our verdict for a DTC brand
Headless access (MCP + APIs from Claude, ChatGPT, custom agents)	Live	No Klaviyo charge; your AI tool’s plan applies	Act now, read-only first
Composer: scheduled tasks, Skills, SQL-backed answers, segment editing	Rolling out	Free plan included; paid plan $20 a month	Act now on Skills and scheduled audits
SQL in the Klaviyo Data Platform	Preview	Not separately priced	Test on questions you can check
Personalization (formerly Marketing Analytics)	Existing add-on; new models in preview	From $100 a month for up to 13,500 active profiles	Test after peak, against a holdout
Klaviyo mobile app (Composer)	Preview, iOS	Included	Optional
Customer Agent: 100+ languages	Live	Customer Agent pricing	Act if you sell in several languages
Customer Agent voice	Coming soon	Not finalised	Wait
Customer Hub web personalisation	Live	Included in the Marketing plan	Test
Clicks to Bricks (target shoppers near a location)	Preview	Not published	Ignore unless you have physical retail
Compliance Hub	Coming soon	Not published	Watch

Everboost is a Klaviyo partner and runs Klaviyo daily across its client accounts, so read the verdicts as an operator’s view: we want the platform to work, and we only recommend what we would switch on for a client.

What does “Klaviyo goes headless” actually mean?

It means Klaviyo no longer assumes you work inside Klaviyo. Its MCP server (the connector that lets AI tools talk to an account) and its APIs are now positioned as the front door, so a marketer can ask Claude or ChatGPT to pull a report, or an agent can read, write and go live without anyone opening the Klaviyo interface. Klaviyo’s own examples are a custom reporting dashboard built in Cursor with live Klaviyo data, and a weekly performance review that posts to Slack.

The part most write-ups miss is how far the write access has moved. In July, the MCP server could draft campaigns and templates but could not build flows or create segments. As of October 2026, Everboost’s live connection exposes tools to create flows, segments and forms, with new flow actions defaulting to draft, plus a campaign send tool that will not run without explicit user confirmation. That is a big change in what an AI tool can do to an account, which is why the read-only advice matters more now, not less. Our Klaviyo MCP server guide covers setup, safety settings and the agency multi-account problem: one connection still binds to one Klaviyo account.

What’s new in Composer, and is it worth using?

Composer, Klaviyo’s AI marketing agent, got four upgrades: answers backed by the new SQL engine with a citation you can check, scheduled tasks (a monthly performance summary or a recurring audit that runs on its own), Skills (saved instructions it applies every time) and segment editing. Klaviyo says more than 138,000 users rely on it.

Skills are the upgrade we would act on first. Everboost has built Composer Skills for segment building, technical account audits and flow wireframes, so the same standard is applied every time rather than depending on how well someone writes a prompt that day. The value is consistency, not speed. Scheduled tasks are the second: a recurring audit that flags an overlapping audience or a declining flow before anyone goes looking is exactly the kind of check that gets skipped in a busy month.

Composer pricing changed in September 2026. Every account now gets a free plan that resets every 30 days, and the paid plan is $20 a month for four times the free capacity, with extra usage in $10 increments. The 10,000-credit launch pricing is now labelled legacy. Our Composer guide covers what it is good and bad at.

What is SQL in the Klaviyo Data Platform?

A preview feature that turns a plain-language question into a SQL query, runs it on your own data and returns the answer with the query attached. Klaviyo’s argument is that showing the query makes AI answers checkable, and that the same question returns the same answer every time. It can query profiles, events, segments, lists and catalogues, with forms, flows and custom objects “coming soon”, and Klaviyo has said a semantic layer (your own definitions for metrics and custom properties) will follow.

How to use it while it is in preview: ask questions you already know the answer to first, and compare against your dashboard. The common failure with AI answers in Klaviyo is not bad maths but the wrong definition, for example counting every Placed Order event rather than attributed revenue, which is the mismatch our attribution guide explains. Everboost’s rule for any AI-generated number is the same: check the query, not just the answer.

What changed with Marketing Analytics, now Personalization?

The add-on has been renamed and given a bigger job. The existing analytics (RFM analysis, a customisable CLV report, product analysis, multi-touch attribution) stay, and Klaviyo has added specialised models that make decisions on every send:

1. Who to reach: Audience Optimization, which drops profiles unlikely to engage, based on live RFM data.
2. What to show: 1:1 content, product recommendations and Discount Decisioning.
3. When: Personalized Send Time.
4. Which channel: Channel Affinity.

It is still a paid add-on to the Marketing plan, priced from $100 a month for up to 13,500 active profiles, and the new models are in preview. Klaviyo has built in holdout testing that measures lift against real customers who did not get the treatment, which is the right way to judge it.

Our view: if you already pay for Marketing Analytics, test Audience Optimization against a holdout after Black Friday, not before. A model that decides who receives a campaign is exactly the setting you do not want to change during your highest-volume weeks, and our Black Friday Klaviyo guide recommends sending as broad as deliverability allows on the big days. If you do not pay for it yet, the new models alone are not a reason to buy it until the holdout results come in. Our Personalization guide covers what the standard Marketing plan already includes and when the add-on is worth paying for.

Where do Klaviyo’s own announcements disagree?

On three details, which matters if you are planning around them:

• How many MCP tools. The press release says “260+ MCP tools and capabilities and 490+ APIs”. Klaviyo’s community explainer says “more than 400 tools and nearly 500 APIs”.
• Where SQL works. The press release says SQL is available in Composer and MCP as a preview. The keynote blog says it is in Composer today, with Claude and ChatGPT support coming soon.
• What SQL can query. The press release lists profiles, events, segments, lists and catalogues. The keynote blog adds campaigns.

None of this is unusual for a launch week, but it means the live tool list on your own connection is the only reliable answer. Everboost checks it directly rather than relying on announcement copy.

What else did Klaviyo announce?

• Customer Agent now supports more than 100 languages, detecting locale through Shopify Markets and showing the right catalogue, pricing and currency per market. Voice, handling a full phone call with the customer’s history, is coming soon with pricing not finalised. Klaviyo says Customer Agent has exchanged more than 1.3 million messages.
• Customer Hub gains more web personalisation and is included in the Marketing plan.
• Clicks to Bricks (preview) targets shoppers near a physical location, so it only matters to brands with stores or stockists.
• Compliance Hub (coming soon) promises a view of compliance health as regulations change.
• AI search: Klaviyo said orders from AI search were up 13 times year on year. It is Klaviyo’s figure from its own platform, and it is one reason Everboost writes these guides in a format AI tools can quote.

What should a DTC brand do now?

Three things, in this order, and none of them changes what customers receive during peak:

1. Connect an AI tool to Klaviyo in read-only mode and use it for reporting. It is free on the Klaviyo side and saves hours of clicking through reports.
2. Turn your repeat work into Composer Skills, starting with the audit or check your team runs most often, and schedule it.
3. Put Personalization’s Audience Optimization on the January test list, with a holdout, if you already pay for the add-on.

If you would rather have a team that already runs all of this decide what is worth switching on for your account, book an intro call.