Klaviyo to HubSpot Migration

Klaviyo is not a HubSpot Data Sync app and is not supported by Smart Transfer. The Klaviyo listing in the HubSpot Marketplace is built by KAV Labs, a Klaviyo partner, and requires its own paid subscription. Its purpose is to let sales teams see Klaviyo engagement while marketing keeps sending from Klaviyo, which is the opposite of a migration.

Workaround: Plan a CSV and API migration. The marketplace app can be genuinely useful during a parallel-run period, but budget it as a temporary cost rather than as the migration mechanism.

Klaviyo is event-first: profiles are described by an indefinitely retained stream of events (metrics) such as Placed Order, Viewed Product, Started Checkout, and Checkout Abandoned. Segments, flow triggers, and reporting all read that stream. HubSpot is property-first, with lifecycle stages and contact properties as the primary primitives. Custom behavioral events exist but require Professional or Enterprise, cap each event occurrence at 50 properties, and work differently enough that flows cannot be translated one to one.

Workaround: Map every event that actually drives a flow or segment, and only those. Some become HubSpot custom behavioral events, some collapse into contact properties updated by integration, and some require the trigger logic to be rethought entirely. Expect to redesign rather than translate. Where historical events power a segment, export the resulting audience and load it as a static list.

Klaviyo computes predicted customer lifetime value, churn risk, expected date of next order, average time between orders, and predicted gender, retraining weekly off the event stream. HubSpot has no equivalent predictive suite: the one exception is churn, where Service Hub Professional health scores band customers as at-risk, neutral or healthy, but that is an admin-defined rules score over CRM and support signals, not a trained model over purchase behaviour. Segments and flows built on the other predictive fields have no destination.

Workaround: Export the current predictive values as static contact properties so the last known state survives, and accept that they immediately begin going stale because nothing recalculates them. Segments built on churn risk or predicted CLV need replacing with rules built from data HubSpot actually holds, such as recency and order count.

Klaviyo segments can filter on the entire retained event history with arbitrary time windows, for example anyone who viewed a product three or more times in the last 30 days but has not ordered. HubSpot active lists cannot express most of these conditions, because the underlying event data is neither present nor queryable in the same way.

Workaround: Triage segments into three groups: those expressible as HubSpot active lists, those that must become static lists frozen at migration time, and those that simply cease to exist. Do this triage before quoting, because the third group tends to include the segments the client cares about most.

Klaviyo tracks email and SMS consent separately with their own subscription states and timestamps. HubSpot uses subscription types plus legal basis fields. A careless import can convert an SMS-only opt-in into an email marketing opt-in, or reset consent timestamps that are the evidence of lawful processing.

Workaround: Migrate consent as a first-class object, not as a column in the contact import. Preserve the consent state, the source, and the original timestamp for every profile, mapped explicitly to HubSpot subscription types and legal basis. Never let a bulk import default anyone to subscribed.

Klaviyo flows support over 45 trigger types tied to product, order, and behaviour events, including abandoned cart, browse abandonment, back in stock, and price drop. HubSpot workflows trigger on properties, form submissions, list membership, and (on Professional and above) custom behavioral events. Abandoned cart in HubSpot depends on an ecommerce integration and is materially less capable.

Workaround: Rebuild only revenue-producing flows, and confirm the trigger data will exist in HubSpot before committing to each one. Back in stock and price drop generally need either a third-party tool or the ecommerce platform itself. This is the point where some Klaviyo clients should be advised to keep Klaviyo for ecommerce sending.

Klaviyo accounts typically sit behind a web of Zapier scenarios and platform integrations feeding profiles and events from ecommerce, CRM, subscription, and loyalty systems. None of those redirect themselves. When they are missed, contacts stop being created and event data stops arriving, and the failure is silent.

Workaround: Run a full integration and Zap audit before anything else, and treat it as a prerequisite rather than a step. Migrations scoped at two weeks routinely become six once the real integration surface is visible.

Klaviyo does not gate features by tier: pricing scales with active profile count and the feature set is identical at every level. HubSpot gates heavily. Workflows, custom behavioral events, the social tool, A/B testing, and custom reporting all require Professional or above; custom objects and business units require Enterprise. Clients accustomed to having everything at their price point encounter tier walls they have never had to think about.

Workaround: Build the feature-to-tier map before quoting the migration, not after. The required HubSpot tier is an output of the feature audit, and it frequently lands a tier higher than the client assumed.

Klaviyo offers native SMS and MMS as a usage-based add-on with broad international support. HubSpot's native marketing SMS requires Marketing Hub Professional or Enterprise plus a paid add-on, and sends only from US numbers to US and Canada destinations.

Workaround: Confirm the client's sending geography before promising SMS parity. Outside the US and Canada, a third-party SMS app is mandatory, which changes both cost and the automation architecture.

Klaviyo Reviews collects and displays product reviews; Klaviyo generates unique coupon codes for use in flows; and product catalogs power dynamic recommendation blocks inside emails. HubSpot has no product reviews and no dynamic product-feed email block. It does generate discount codes, but they are shared codes that redeem only against HubSpot payment links, not unique single-use codes issued per recipient inside a flow. Product data can live in HubSpot Products.

Workaround: Identify which emails depend on catalog blocks or unique coupons before rebuilding them, since those templates cannot be recreated faithfully. Reviews need a dedicated third-party platform.

Klaviyo sending reputation is built on its own infrastructure and does not transfer. Moving a large, previously well-performing list to HubSpot means starting again on new sending infrastructure, with the attendant risk of a deliverability dip precisely when the client is watching most closely.

Workaround: Warm up sending deliberately: start with the most engaged segments and expand over several weeks. Complete SPF, DKIM, and DMARC configuration before the first send, and set expectations that early open rates are not a like-for-like comparison.

Klaviyo email templates, signup forms including popups and flyouts, and landing pages have no import path into HubSpot. Signup forms in particular are embedded in the storefront theme and stop capturing when Klaviyo is removed.

Workaround: Rebuild templates in HubSpot and replace every embedded form in the storefront theme before decommissioning. Test on a staging theme: a popup that silently stops collecting is indistinguishable from one that is simply not converting.

Klaviyo profile properties are created implicitly by whatever writes them, so accounts accumulate inconsistent keys, mixed types, and near-duplicate fields. HubSpot requires each property to be declared in advance with a fixed type, and rejects values that do not conform.

Workaround: Profile the actual property keys and value types in the export before designing HubSpot properties, rather than trusting a documented schema that does not exist. Expect a consolidation pass where several Klaviyo keys merge into one HubSpot property.

The HubSpot Marketplace Klaviyo app is third-party, paid, and built for coexistence, not migration

Klaviyo's retained event history is the product, and none of it transfers

Predictive fields such as CLV and expected date of next order have no HubSpot equivalent and go stale the moment they land; churn risk has a partial home in Service Hub health scores, but as a rules-based score you define, not a model

Event-based segments with time windows usually cannot be expressed as HubSpot active lists at all

Schemaless Klaviyo properties fail silently on import when the matching HubSpot property was never declared

Consent mishandling during import is a legal exposure, not a data-quality issue

Back in stock and price drop flows have no HubSpot equivalent; abandoned cart is materially weaker

Klaviyo gates no features by tier, so clients hit HubSpot tier walls they have never encountered

HubSpot native SMS is US and Canada only, on a paid add-on above Marketing Hub Professional

Signup forms live in the storefront theme and stop capturing silently when Klaviyo is removed

Sending reputation resets, so early deliverability is not a like-for-like comparison

The Zap and integration audit routinely turns a two-week estimate into six weeks