Fiverr’s seller fee is a flat 20% on typical orders. Upwork’s fee is variable 0–15% per contract; a 10% planning estimate is common when you do not have the offer % yet.
On a $1,000 job: Fiverr leaves about $800 before payout; Upwork at 10% leaves about $900; at 15% about $850. Direct Stripe often leaves still more but without marketplace demand.
Open Compare with the same amount to mark the best net or the lowest charge for your target. Fees alone do not choose the platform for you.