Klaviyo and HubSpot Marketing are both popular customer relationship management (CRM) solutions for businesses. Klaviyo is a specialized email marketing tool, whereas HubSpot is a comprehensive suite of tools for inbound marketing. While the tools within the HubSpot family are designed to work together, such as emails and landing pages, Klaviyo doesnt provide any other tools, only email marketing. Klaviyo also has more robust automation, analytics, and segmentation capabilities, allowing you to target your messages more effectively. Klaviyo is also much more affordably priced than HubSpot and is more tailored towards entrepreneurs and small businesses. In conclusion, while HubSpot offers many more features, Klaviyo is tailored toward email marketers and provides them with more comprehensive features.