Klaviyo is a leading AI-powered B2C CRM and marketing platform in 2026, offering unified email, SMS, WhatsApp, push notifications, automation flows, customer data platform (CDP), analytics, and AI agents for marketing/service. It powers personalized omnichannel experiences for 183,000+ brands with deep e-commerce integrations. Free plan for small starters; paid plans scale with contacts/sends—ideal for growing B2C businesses focused on retention and revenue.

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