Yes you can. Gousto discount codes are mostly valid for new customers - same as the welcome bonus offering a discount on your first boxes. However, from time to time there are site-wide discount codes valid for use by all Gousto customers but they tend to be very rare.
Currently, we have 2 Gousto discount codes and 8 other deals - saving our users £54.23 on average.
When making you first order we advise checking what the current welcome bonus offer is and then checking to see if there are any discount codes offering a better deal.