It is free of charge to sign up for Ridesum for both trainer/expert and rider. We do however offer the Rider Premium- where you as a rider can record your digital Ridesum training. Read more here.
The fees for coaching by each individual trainer can be found in the trainer profiles, respectively. You pay for your session directly to your trainer through a payment method of your choosing that is suitable for both of you. Ridesum does not charge a commission fee.