Klaviyo vs HubSpot for E-commerce, a Real Migration's Notes

The client was a mid-size DTC brand that had been using HubSpot since their early days, long before HubSpot was really the right tool for their volume and use case. They were paying enterprise-tier HubSpot prices for what amounted to email campaigns and basic flows, and the e-commerce-specific behavior — purchase-based segmentation, product-level event tracking, revenue attribution per email — was all bolted on through workarounds.

What Klaviyo did better, immediately

Native e-commerce event tracking was the single biggest difference. Klaviyo's data model is built around products, orders, and purchase behavior as first-class objects, where HubSpot's is built around contacts and deals, with e-commerce bolted on through an integration layer that lost granularity we actually needed — specifically, product-level revenue attribution per flow, which Klaviyo gave us natively and HubSpot could only approximate.

HubSpot treats e-commerce as a thing bolted onto a CRM. Klaviyo treats the CRM as a thing bolted onto e-commerce. For a store, that priority ordering actually matters.

What got worse

• Klaviyo's CRM-adjacent features (deal pipelines, sales-side workflows) are genuinely weaker — fine, since the client didn't use them, but worth flagging for anyone with a hybrid B2B/B2C motion.
• Content and landing page building inside Klaviyo is noticeably less mature than HubSpot's, which had a real page builder; we ended up keeping a separate tool for that.
• Migration of historical workflow logic wasn't a clean export-import — every automation had to be manually rebuilt and re-tested, which ate most of the three-month timeline.
• Cost scaled with list size more aggressively than expected once we accounted for the client's list growth rate over the following two quarters.

The honest verdict

For a pure e-commerce brand without a meaningful B2B sales motion, Klaviyo's e-commerce-native data model is worth the migration pain, and the client's email-attributed revenue rose about 22% in the first quarter post-migration, mostly from better-segmented flows the HubSpot workaround couldn't support. For anyone running a hybrid model with real sales pipeline needs, I'd think harder before making this move — you're trading CRM maturity for e-commerce depth, and that's a real tradeoff, not a strict upgrade.