The verdict
If you bill through Stripe alone and want a proven, narrow tool, pick Rewardful. Coupon tracking, first or last touch attribution and signed webhooks cover most programmes.
If you bill through Paddle or Chargebee, want the portal on your own domain, or want an assistant to work with your programme data through an MCP server, pick Tolt.
On Stripe alone I cannot separate them, so I leave the winner open. Compare payout methods and fees, because Rewardful pays through PayPal and Wise and Tolt adds Payoneer. Decide what affiliates may do, such as brand-name advertising, before you open either programme.