Based in Edinburgh and established in 2015 by mother and daughter team, Loral and Eishel Quinn, the platform is designed to inspire "sustainable living and giving".
The platform gives shoppers the opportunity to automatically round-up their cashless transactions to the nearest pound and give the spare change to their chosen charities.
It also gives users "feel good updates" in real time.
The co-founders hope that Sustainability can help highlight the positive impact an individual can make to the world around them, creating trust in the charities people are donating to.
Unlike other forms of giving, they can pause the donation instantly in an app, and receive no unwanted direct mail, phone calls or texts.
Loral Quinn, CEO and co-founder of Sustainably explains: "We believe that making giving back fun, engaging and part of daily life will encourage people to give more. We are part of a community of change-makers who want to make a difference to our world every day, be inspired and connected with like-minded people around us and have an impact just by living our busy lives."
Sustainably, is already working with national and local charities about to start their beta test. The business currently employs 16 and following successful fund raising on Indiegogo has plans to hire six in the next 12 months.