Klaviyo is described as 'Optimize customer engagement with multichannel messaging, CRM integration, and AI-driven analytics, unifying marketing, service, and data for B2C brands' and is a Email Marketing service in the business & commerce category. There are more than 100 alternatives to Klaviyo for a variety of platforms, including Web-based, SaaS, Windows, Self-Hosted and Mac apps. The best Klaviyo alternative is Mailchimp, which is free. Other great apps like Klaviyo are Listmonk, Stripo.email, Brevo and GetResponse.