Blue Mountain

Blue Mountain provides a comprehensive online platform for creating and sending digital greeting cards and printable cards. It offers a vast selection of templates for various occasions, extensive personalization features including photos, custom messages, and unique 'SmashUps™' with celebrity voices. Users can manage their cards through accounts, schedule deliveries, and share greetings via multiple digital channels.

Blue Mountain is a direct competitor to GreetsU. It offers a wide variety of e-cards and printable cards, with extensive personalization options including adding photos, custom messages, and even celebrity SmashUps™ which involve personalized audio/video. Users can create accounts to save cards and schedule deliveries. The platform supports sharing via email, text, and social media, and offers various categories for occasions. While it doesn't explicitly mention 'live preview and animations' for all cards, the 'SmashUps™' and 'Creatacards™' imply dynamic elements and customization that align with the spirit of the feature. The site also offers third-party login options.