Canvy is a browser-based mockup tool aimed specifically at fine art painters and poster designers: organized around shareable "rooms" of design resources rather than a generic device-mockup catalog.
The art/poster-specific focus is a real point of difference from the dozens of app-and-device mockup sites in this category: genuinely useful if that's actually your medium.
Good specifically for illustrators, painters, and poster designers presenting print or wall art: a poor fit if you need app or website device mockups.
It's a freemium tool (free rooms plus a paid tier): check current pricing directly, since specifics weren't clearly listed on the main page.
A free membership gives access to a limited set of rooms (roughly a dozen, reports vary) without a watermark. Full access to the 1,000+ room catalog and Etsy integration requires a paid plan running roughly $9-$15/month. Confirm current plan names before quoting a client.
Online tool for fine art painters and poster designers.