Klaviyo vs Customer.io for SaaS: Pricing and Fit (2026)

Prices checked 7 October 2026; each price links to the vendor page it came from.

The pairing comes up because both claim to turn behavioural data into automated email, and both have a visual builder. What differs is the starting vocabulary. Klaviyo's navigation is organised around ecommerce: integrations with Shopify, Commerce Cloud, Wix, WooCommerce, Magento and BigCommerce, product-focused personalisation, reviews and a data platform. Customer.io's pricing page talks about journeys, audiences, objects, reverse ETL, webhooks and an MCP server. A SaaS team can bend either one to fit, but one of them starts closer.

The price ladders happen to be close in the middle of the range, which is why a spreadsheet comparison misleads. At around 10,000 profiles the two are $5 apart, and the real decision is which data model you will be fighting for the next three years.

The two ladders side by side

Klaviyo's selector asks for active profiles and returns a monthly figure; Customer.io's returns a figure for each profile stop. Klaviyo's Email plus SMS selector did not render when the page was read, so no SMS number appears below and none should be assumed.

At 25,000 profiles the minimum monthly gap is $400 - $325 = $75, which is at least $900 a year; if Customer.io's 25k figure falls near its 20k stop of $235 the gap approaches $165 a month. The cheap end belongs to Klaviyo: at 1,000 profiles it is $30 against Customer.io's $100 entry price, a $70 monthly or $840 yearly saving, and it also offers a free plan up to 250 profiles.

Both vendors count differently, so equal profile numbers do not mean equal bills. Klaviyo's selector is labelled active profiles, so read its help centre for what counts as active before assuming a long dormant list is free. Customer.io counts people and objects together, keeps any profile that existed during the month in that month's bill even if you delete it, and bills the same profile once per workspace, as its billing documentation states. An app with 10,000 users and 2,000 company objects is a 12,000-profile account there, so the $145 figure at 10k would not be the whole story.

The send limits point the other way. Klaviyo's plan limits scale with profiles, 5,000 emails at 500 profiles and 100,000 at 10,000, so a product that emails each person a dozen times a month needs to check the next tier. Customer.io's 1 million bundled emails mean a 10,000-profile product could send 100 emails per profile before overage, and extra volume is $0.12 per 1,000: 300,000 emails above the bundle would cost 300 x $0.12 = $36.

What a software product runs into on each side

On Klaviyo, the question is whether your world fits a shopper model. A product with plans, seats, trials and invoices can send events and properties through its APIs, but the platform's own surface is catalogs, product feeds, carts and revenue attribution; the free plan's analytics list revenue attribution for campaigns and basic customer segmentation, and the pricing page's navigation points at storefront and commerce apps. If your customers are consumers who subscribe to a service, that is workable, and a $30 price at 1,000 profiles is hard to beat. If your customers are businesses with admins, members and workspaces, you end up flattening those relationships into profile properties.

On Customer.io, the question is whether you will spend engineering time. Its Essentials plan lists a visual workflow builder, an AI-powered segment builder, send-time optimization, reusable components, and 2 object types, which is where a company or workspace record would live. The plan is also the first rung of a service ladder: chat support, onboarding help, custom role-based permissions and managed deliverability all start at Premium, so a team that wants a person on the phone while it wires up events should price that tier in.

Neither page makes the other's strength a freebie. If you run a Shopify store next to your SaaS product, Klaviyo's listed storefront integrations are a genuine advantage for the store, while Customer.io would need orders sent as events by your own code.

Migration notes

From Klaviyo to Customer.io, the order matters. Export suppressed and unsubscribed profiles first, then active ones, and import them as people with their consent status intact. Klaviyo metrics such as placed order or started checkout have to be recreated as Customer.io events; if you stop using the store integration for email, decide whether your backend or a warehouse sync will send them. Rebuild each flow as a campaign in Customer.io, and keep Klaviyo running for the store flows you do not move.

From Customer.io to Klaviyo, check what you lose before you gain a lower entry price: objects are the part with no obvious home, so map each company field to a profile property and test one segment that depends on it. Remember Klaviyo's volume limit is a multiple of profiles, so rerun your busiest month's send total against the plan you would land on.

Whichever way you go, run the old and new tool in parallel for a billing cycle with one flow moved at a time. For two more views on Customer.io's market position, read Customer.io vs Loops and Encharge vs Customer.io; for options beyond Klaviyo, see the Klaviyo alternatives and the guide to email platforms for B2C SaaS.

Bottom line

Use Customer.io for a software company with business customers: the price is level with Klaviyo at 5,000 to 10,000 profiles, lower beyond that, and the data model is built around events and objects instead of orders. Use Klaviyo for anything with a catalog and a checkout, and for very small consumer lists, where $30 at 1,000 profiles and a free plan are real advantages. If you do both, assign the store to Klaviyo and the product to Customer.io, and pick one place to record opt-outs. The comparison hub lists more pairings.