Both of these are the tools people graduate to when a starter email platform stops being enough. They are not interchangeable. Klaviyo is a customer-data platform for stores that happens to send email and SMS. ActiveCampaign is an automation engine for marketers that happens to have a CRM. Pick by what your data is, not by feature lists.
Pricing at realistic list sizes
The pricing models differ in kind. At the time of verification (2026-09-09), Klaviyo bills monthly only, by active profiles: the paid tier starts at $20 a month for up to 500 profiles with 5,000 emails, and the configurator shows $45 at 1,500 profiles with 15,000 emails. The free plan covers 250 profiles and 500 sends. ActiveCampaign shows only annual-billed rates: Starter is $15 a month at 1,000 contacts, Plus $49, Pro $79 and Enterprise $145, all at 1,000 contacts. There is no free plan, only a 14-day trial, but there is a 30-day money-back guarantee.
Two things follow. First, Klaviyo's monthly-only billing means no annual discount ever, which ActiveCampaign's annual rates already assume; the monthly ActiveCampaign price is not shown on its pricing page, so the like-for-like comparison is harder than it looks. Second, ActiveCampaign's Starter is not a real comparison point: it caps automations at 5 actions, limits segmentation and has one user, so anyone choosing ActiveCampaign for automation is choosing Plus at $49 or Pro at $79. Against Klaviyo's $45 at 1,500 profiles, the core products are priced in the same band.
The add-ons decide the real bill. Klaviyo sells Composer at $20 a month, Customer Hub from $20, Reviews from $25 at 250 orders, and mobile messaging per send plus carrier fees. ActiveCampaign sells CRM pipelines, sales engagement, SMS, WhatsApp and reporting as add-ons. Neither headline price includes the thing that made you consider the tool. One Klaviyo-specific trap: inactive profiles still count toward the bill unless you suppress them, so a large dormant list costs money every month.
Automation and feature depth
Klaviyo's depth is vertical. Flows trigger on store events, unified profiles pull from 350+ integrations, segmentation is real-time, predictive analytics and product recommendations are built in, and revenue attribution reports show what each flow earned. SMS, MMS, WhatsApp and RCS are native channels. If the trigger is "customer did something in the store", Klaviyo is the better tool.
ActiveCampaign's depth is horizontal. The visual builder with 950+ recipes handles multi-step, multi-branch workflows across email, site behaviour and sales, with predictive sending, conditional content and attribution on Pro. Segmentation is tiered from limited on Starter to premium on Enterprise. It integrates with Shopify and WooCommerce, but store data is one input rather than the centre of the model.
Ease of use
Both score the same middling mark for different reasons. Klaviyo's pre-built flows make the basics fast, but choosing add-ons, managing profiles and configuring pricing take attention. ActiveCampaign's builder is powerful and takes time to master, and its modular plan structure makes it hard to know which tier you actually need. Neither is a first email tool.
Exit cost
Higher than the starter tools on both sides. Klaviyo holds your customer data model, segments and attribution history, and any SMS consent you collected. ActiveCampaign holds automations that encode months of decisions, plus the CRM if you added it. Contacts export easily; the logic does not. Budget for a rebuild rather than a migration.
Scenario by scenario
A Shopify brand with abandoned-cart, post-purchase and win-back flows: Klaviyo. This is the case it was built for, and the store integration is the deepest available.
A consultancy or agency nurturing leads into sales calls: ActiveCampaign Plus or Pro with the CRM add-on. Klaviyo has nothing to say about a pipeline.
A course business with a launch sequence, segments by interest and a small product catalog: ActiveCampaign. The catalog is incidental; the branching sequence is the work.
A DTC brand where SMS will carry a third of revenue: Klaviyo, for native multi-channel and per-message attribution, priced with the carrier fees in view.
A store under 500 profiles with one welcome flow: neither yet. Klaviyo's free plan is fine, but so is /tool/mailerlite at $12, and you will not miss the depth until the list is bigger.
What neither does well
Neither is cheap for large lists with low engagement, because both price on contacts or profiles. Neither is a good newsletter tool for a creator; /tool/kit does that at a fraction of the cost. And neither is transparent at checkout: Klaviyo's add-on and SMS pricing, and ActiveCampaign's annual-only display and add-on stack, both mean the real number arrives after you sign up. Price the add-ons you know you need before comparing headline tiers.
Profiles at /tool/klaviyo and /tool/activecampaign; alternatives at /alternatives/klaviyo and /alternatives/activecampaign.