Hi there.

It depends a lot on your budget and what is needed. If you are looking only for some initial site audits, which would include full qualitative and quantitative research, testing ideas, identifying low-hanging fruits, funnel drop-off points, etc or if you also want someone to implement the experiments.

The reasons for a high bounce rate are many but the first place I would look at would be the relevance between your clients' landing pages and the banners/content that are bringing the users to the site. Also, do they have a clear Unique Selling Proposition on their landing pages? Is it clear what the site is about and what they will find there?

If you are looking for more information and ways on how you can reduce their bounce rates, please feel free to message me and I will be more than happy to help.