Dynamic Mockups fills a specific gap that comes up for print-on-demand Etsy sellers: you have dozens or hundreds of designs, and you need good-looking product photos of all of them without a warehouse full of physical inventory to photograph. The quality ceiling here is meaningfully higher than what you get from Printful's built-in preview tool, which matters for listings because the main image is doing most of the conversion work in Etsy search.
The bulk generation workflow is what separates it from simpler tools. You can feed in a folder of design files and have mockups for an entire collection ready in minutes. The API integration is primarily aimed at developers building automated storefronts, but the Canva plugin makes the bulk workflow accessible to non-technical sellers. At $15/month for the Starter plan, it's a reasonable investment for anyone managing more than 30 active product variations.