Catalog-driven retail
Klaviyo
Email plan from $20/mo at 500 profiles · Free plan for 250 profiles · Klaviyo pricing →
What it does well for stores. Klaviyo is built around store data. Orders, product views and cart events arrive as profile activity, so a segment such as "viewed a product twice in the last week and never bought" can be built from the interface without a data request. Abandoned-cart and browse flows read the items in the cart or the products viewed, which is the detail that makes a reminder feel specific rather than generic. Email and SMS plans share the same segments, so a customer who ignores an email can be reached by text under the rules you set.
Where it falls short. Pricing follows the profile count, so a large catalog with a large list grows in cost quickly. The Email plan lists $100 a month at 5,000 profiles and $150 at 10,000. SMS is sold through separate Email+SMS plans whose prices are not shown on the same page, so get that quote before you assume the text channel is included. The depth of the platform also takes time to learn. A two-person store that only needs a monthly newsletter will pay for features it does not use.
Price. The Email plan is listed at $20 a month for 500 profiles, $30 for 1,000, $60 for 2,500, $100 for 5,000, $150 for 10,000 and $400 for 25,000. The free plan covers 250 profiles, 500 email sends a month and $5 of mobile messages.
Who should pick it. A store with a live product catalog, repeat buyers and a plan to run cart, browse and post-purchase flows from day one. If the catalog is simple and the plan is only occasional promotions, the price is harder to justify.