What is the best affiliate platform for Squarespace?

I have a new business with 6 online training courses for my industry. due to launch in a week (website not yet live). These courses will be marketed to customers through industry partners, using affiliate marketing. 

There are many affiliate platforms like  Peaches, Affiliatly, and Tapfiliate. Some people recommend Peaches as it's built for Squarespace, but similar to Tapfiliate it's expensive at $59 p/m.

• Does anyone have a good recommendation based on experience for an affiliate platform for Squarespace?
• Affiliatly is much cheaper at $16 p/m. Does anyone have experience with this platform and can provide feedback whether it's a good option?

Thanks!