Klaviyo is the most deeply integrated email and SMS platform for e-commerce in the US. Native Shopify, WooCommerce, BigCommerce, and Magento sync brings purchase history, browse data, and product catalogs into segmentation and automation, which is why serious online stores choose it.
All paid plans include the same advanced automation features (flows, predictive analytics, AI segments), so the only thing that scales with contact count is price. The free plan covers 250 active profiles and 500 monthly sends, and Klaviyo only counts active profiles, so suppressed and unengaged contacts do not push you into a higher tier. SMS to US mobiles is supported natively. Klaviyo bills in US dollars.
Klaviyo was founded in 2012 and is headquartered in Boston, USA.