The Good Business Charter is UK based and is designed to be simple and not expensive, whilst at the same time encouraging businesses to be more responsible (and recognise those already doing all our 10 components). The B-Corps, whilst worthwhile, is a lengthier process with a higher cost. We believe the simplicity and cost effectiveness of the Good Business Charter will encourage many organisations of all sizes to sign up so we can quickly get a critical mass which we hope will in turn encourage other businesses to join them and in turn encourage wider good business practice.  See here for more information on how we compare to other accreditations.
We are a small charity and are therefore not experts in each of the ten components. As such we offer what advice or support we can, and are happy to introduce you to other GBC accredited organisations who may specialise in a particular component. We also encourage our members to go to other organisations such as Blueprint for Better Business and BITC to further develop the way they are doing responsible business, but the GBC enables them to set out as a baseline what they are committed to.