What are some alternatives?
When comparing Designtack and Share As Image, you can also consider the following products
Contentdrips - Create micro content for your social media growth
Canva - Canva makes design simple for everyone. Create designs for Web or print: blog graphics, presentations, Facebook covers, flyers, posters, invitations and so much more.
PicMonkey - PicMonkey is a feature-rich online photo editor that works right in your browser; no downloads...
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
Aggreto - Aggreto, a powerful social media aggregator tool and UGC platform that allows you content aggregation from multiple social networks (Facebook, Instagram, Twitter, etc.) for your events, website, and brands.