G2 reviewers of Retention.com are largely positive about its value, with many small businesses reporting strong ROI — some citing 5x to 6.8x returns and significant email list growth. High-rating reviewers frequently describe the pricing as reasonable given the results, particularly for e-commerce brands on Shopify using Klaviyo. However, cost concerns appear consistently across G2 reviews, especially for smaller teams with lower traffic volumes, seasonal businesses, and those still proving incrementality. A few G2 users note that the Grow tier's contacts can be lower quality, making ROI harder to justify. Overall, Retention.com's pricing delivers strong value for traffic-rich e-commerce businesses but may feel steep for early-stage or low-traffic operations.