Klaviyo is a cloud-based email marketing solution for e-commerce businesses. It is incredibly user friendly, and can save you lots of time on tasks like setting up email automation to segmenting your target lists. It helps businesses transform information into valuable, relevant messages across different marketing channels, such as email, SMS, and web notifications, by understanding cues from visitors, subscribers, and customers.

Key features:

1. Fast integration with other tools. This allows users to centralize data from a variety of sources, including e-commerce platforms, payment processors and marketing tools;

2. Audience segmentation, based on behavior, properties, or engagement with previous campaigns;

3. Performance reporting, a dashboard which allows users to measure performance based on information, such as revenue generated by customer behavior, visitor activity, email marketing and advertising campaigns. 

Pricing: Free for sending 500 emails maximum to up to 250 contacts, and first 50 SMS are free as well. Available as a monthly subscription with pricing that varies based on the number of contacts. To calculate the price for different plans, click here.