best self hosting referral software?

Hi guys

Whats the best referral software for online shops wfich you can self host on the own webspace? It should be possible that users, webmasters and influencers can generate an affiliate link with discount and if someone use it, i pay them a provision.

im looking for a solution like
https://www.refersion.com/
https://www.postaffiliatepro.com/

...but self hosted or cheaper