Klaviyo

Klaviyo is a Sales & Marketing Agents B2C CRM and AI marketing platform that unifies customer data with email, SMS, RCS, WhatsApp, mobile push, and web events for personalized revenue campaigns. It has a free plan up to 250 active profiles, with paid email plans starting at $20/month for 251-500 contacts.

Klaviyo positions itself as an autonomous B2C CRM rather than only an email service provider. The website describes it as both a system of record and a system of action, combining a customer data platform, real-time signals, predictive analytics, and AI agents that can help turn customer data into automated marketing execution. The platform supports at least 6 engagement and data channels named on the site: email, SMS/text, RCS, WhatsApp, mobile push, and web events. That makes it most useful for brands that need behavior-triggered flows across multiple owned channels, rather than teams that only send simple newsletters.

For ecommerce teams, Klaviyo’s strength is the connection between customer profiles, product/order events, and revenue attribution. The website specifically calls out Shopify, ecommerce platform integrations, payment providers, CRMs, analytics tools, messaging platforms, and real-time syncing of customer, product, and order data. That data foundation supports use cases like abandoned cart recovery, post-purchase education, replenishment reminders, winback campaigns, and VIP segmentation. Klaviyo was founded in 2012 in Boston by Andrew Bialecki and Ed Hallen, giving it a longer operating history than many newer AI-native marketing tools in the Sales & Marketing Agents category.

Klaviyo’s AI story is centered on K:AI Agents and agentic workflows, including integrations with the Klaviyo ChatGPT app, Klaviyo Claude Connector, and Klaviyo MCP. Compared to the 870+ AI tools in our directory, Klaviyo is more specialized than general-purpose marketing automation tools because its core value depends on ecommerce data depth, revenue attribution, and cross-channel lifecycle automation. It is usually a stronger fit than a lightweight email tool when purchase behavior, real-time customer profiles, and segmentation are central to the business model. It is less ideal for non-retail B2B teams, publishers, or creators who mainly need simple newsletter publishing without commerce data.