Klaviyo to HubSpot Migration

No HubSpot-built path takes you off Klaviyo: Smart Transfer does not support it, and the Data Sync framework has no Klaviyo app. What sits in the HubSpot Marketplace instead is a third-party listing from KAV Labs, a Klaviyo partner, sold on its own paid subscription. Its job is to let a sales team watch Klaviyo activity while marketing keeps sending from Klaviyo, the opposite of what you are trying to do.

Workaround: A CSV and API migration is the actual mechanism to plan around. Keep the KAV Labs app in the budget only as a temporary line for the parallel-run period when both systems are live, useful there, but never mistake it for the migration itself.

The event stream is Klaviyo itself: every profile carries an indefinitely retained record of what it did, Placed Order, Viewed Product, Started Checkout and Checkout Abandoned among them, and segments, flow triggers and reporting all read straight off it. HubSpot works the other way round, built on properties and lifecycle stages rather than a retained event history. A custom behavioral event exists on the HubSpot side, but only from Professional or Enterprise, capped at 50 properties per occurrence, different enough in shape that a flow rarely survives translation one to one.

Workaround: Map only the events that actually drive a live flow or segment, not the full catalogue. Some become HubSpot custom behavioral events, some collapse down into a contact property kept current by integration, and some need the trigger logic rebuilt from first principles. Treat this as a redesign rather than a port, and where a segment depends on historical events, export the audience it currently holds and load that as a static list rather than trying to keep the logic alive.

Every week, Klaviyo retrains a set of predictions off your event stream: predicted lifetime value, churn risk, expected date of next order, average time between orders, predicted gender. None of it has a HubSpot equivalent as a trained model. Service Hub Professional comes closest on churn alone, banding customers as at-risk, neutral or healthy, but that score is a set of rules you define over CRM and support signals rather than a model reading actual purchase behaviour, and if your buying pattern runs on a Ramadan and Eid cycle rather than a flat calendar, a rules score is only as good as the rules you write for it. Every other predictive field, including the ones built on how often and when people reorder, simply has nowhere to go in HubSpot.

Workaround: Export the current predictive values as static contact properties before cutover, so at least the last known state survives the move, and go in knowing they start going stale from day one since nothing in HubSpot recalculates them. Any segment resting on churn risk or predicted lifetime value needs rebuilding on data HubSpot actually keeps, recency and order count rather than a trained score.

A Klaviyo segment can reach back across the whole retained event history with any time window you set: anyone who viewed a product three times or more in the last 30 days and still has not ordered, for instance. Most of that logic has nowhere to run in a HubSpot active list, because the event data itself is neither stored nor queryable the same way.

Workaround: Sort every segment into one of three groups before anything else: what an active list can express, what has to be frozen as a static list at the point of migration, and what simply stops existing. Do this triage before you commit to a price, because the segments in that third group are usually the ones you value most.

Klaviyo keeps email and SMS consent as two separate states, each with its own timestamp; HubSpot collapses that down into subscription types plus a legal basis field. Handled carelessly, an import can turn an SMS-only opt-in into an email marketing opt-in, or wipe the very timestamp that stands as your evidence of lawful processing, which is exactly what a data protection review asks to see.

Workaround: Give consent its own migration step rather than letting it ride along as one more column in the contact import. Carry the state, the source and the original timestamp for every profile across explicitly, mapped to HubSpot subscription types and a legal basis, and never let a bulk import default a single person to subscribed.

Over 45 trigger types drive Klaviyo flows, tied to product, order and behaviour events: abandoned cart, browse abandonment, back in stock, price drop among them. HubSpot workflows trigger on a narrower set, properties, form submissions, list membership and custom behavioral events, and that last one sits behind a higher plan than most Klaviyo buyers expect to need. Abandoned cart specifically depends on an ecommerce integration in HubSpot and comes back materially weaker, worth noting if a meaningful share of your orders are cash on delivery, since a COD order looks like an unfinished checkout to a system that only understands paid ones.

Workaround: Rebuild the flows that actually produce revenue first, and check the trigger data will exist in HubSpot before promising each one. Back in stock and price drop generally need a third-party tool or the ecommerce platform itself to cover them. This is the point in the project where you may be better off keeping Klaviyo running for ecommerce sending rather than forcing every flow across.

Behind most Klaviyo accounts sits a web of Zapier scenarios and platform integrations, ecommerce, CRM, subscription and loyalty systems among them, all feeding profiles and events in. None of that redirects itself when the migration happens. Miss one and contacts simply stop being created, event data simply stops arriving, and nothing tells you it happened.

Workaround: Treat a full integration and Zap audit as the prerequisite it is, not one step among many, and run it before anything else starts. A project scoped at two weeks routinely turns into six once the real integration surface comes into view.

Klaviyo's pricing scales on active profile count alone; every plan carries the same feature set, so tier has never been a wall you had to think about. HubSpot is built the other way: workflows, custom behavioral events, the social tool, A/B testing and custom reporting all sit behind Professional or above, and custom objects and business units need Enterprise. Coming from a platform where everything was simply included, that tier structure is the first real surprise.

Workaround: Build the feature-to-tier map before a price is quoted, not after. The HubSpot tier you actually need is an output of that audit, and it lands a level higher than expected often enough that it should be treated as the default outcome, not the exception.

Klaviyo's native SMS and MMS work broadly wherever you sell, billed on usage. HubSpot's native marketing SMS sits behind Marketing Hub Professional or Enterprise plus its own paid add-on, and even then sends only from US numbers to US and Canada destinations, which rules it out entirely for a customer base spread across the Emirates, Saudi Arabia and the wider Gulf.

Workaround: Confirm the sending geography before SMS parity is promised to anyone. Selling across the Gulf makes a third-party SMS app mandatory rather than optional, and that choice changes both the cost line and the automation architecture underneath it.

Three separate Klaviyo capabilities have no clean landing spot: Reviews, which collects and displays product feedback; the unique coupon codes flows generate per recipient; and the catalogue-powered recommendation blocks inside emails. HubSpot has no product reviews feature and no dynamic product-feed block for email. It will generate a discount code, but only a shared one that redeems against a HubSpot payment link, not a single-use code issued individually inside a flow. Product data itself does have a home in HubSpot Products.

Workaround: Before any template gets rebuilt, work out which ones depend on a catalogue block or a unique coupon, because those cannot be recreated faithfully in HubSpot. Reviews need a dedicated third-party platform found and budgeted separately.

Sending reputation lives on Klaviyo's own infrastructure and does not travel with the account. A list that performs well today starts again from zero on HubSpot's sending infrastructure, and the deliverability dip that risk brings tends to land exactly when you are watching the numbers most closely, which is one more reason not to schedule the cutover into the run-up to Ramadan or Eid, the weeks a retail calendar in this region can least afford it.

Workaround: Warm the sending reputation up deliberately rather than sending to the full list on day one: start with the most engaged segments and widen out over several weeks. Have SPF, DKIM and DMARC fully configured before the first send goes out, and go in expecting that early open rates will not read as a like-for-like comparison against Klaviyo's numbers.

Email templates, signup forms including popups and flyouts, and landing pages all share the same problem: nothing imports into HubSpot, everything gets rebuilt. Signup forms carry the sharpest risk, because they sit embedded inside the storefront theme itself and simply stop capturing the moment Klaviyo is removed.

Workaround: Rebuild the templates in HubSpot and replace every embedded form inside the storefront theme before Klaviyo is decommissioned, not after. Test the change on a staging theme first, because a popup that has silently stopped collecting looks, from the outside, identical to one that is simply underperforming.

Whatever writes to a Klaviyo profile creates its own property on the spot, which over years leaves an account with inconsistent keys, mixed types and near-duplicate fields, often multiplied further by a catalogue and storefront running in both Arabic and English. HubSpot works the opposite way: every property has to be declared in advance with a fixed type, and it rejects anything that does not conform.

Workaround: Profile the real property keys and value types straight out of the export before a single HubSpot property is designed; there is no documented schema to trust instead. Expect a consolidation pass where several Klaviyo keys, including any Arabic and English variants of the same field, collapse into one HubSpot property.

The Klaviyo listing in the HubSpot Marketplace is a paid third-party app built to let both platforms coexist, not to carry you off Klaviyo

The retained event history is what Klaviyo actually is, and not one record of it transfers across

Predictive fields like lifetime value and expected date of next order have nowhere to go in HubSpot, and whatever value gets exported starts going stale the moment it lands; churn risk gets a partial home in Service Hub health scores, but only as a rules score you write yourself, not a trained model reading behaviour

An event-based segment carrying a time window is usually one that simply cannot be expressed as a HubSpot active list

A schemaless Klaviyo property that was never declared as a matching HubSpot property does not error on import; it just fails silently

Getting consent wrong during import is a legal exposure, not a data-quality footnote to fix later

Back in stock and price drop flows have no HubSpot equivalent at all, and abandoned cart, the one ecommerce flow HubSpot does offer, comes back materially weaker than what Klaviyo runs

Klaviyo never gated a feature by tier, so expect to hit a HubSpot tier wall you have never had to think about before

HubSpot's native SMS only reaches US and Canada destinations, and only once a paid add-on above Marketing Hub Professional is switched on, of no use to sending across the Gulf

Signup forms live inside the storefront theme itself, and they stop capturing the moment Klaviyo is removed, silently, with nothing to flag it

Sending reputation resets to zero at cutover, so the early deliverability numbers are not a fair comparison against what Klaviyo was achieving

The Zap and integration audit is what routinely turns a two-week estimate into a six-week reality