Honey (PayPal)

The browser extension that automatically tries every coupon code at checkout before you pay. Acquired by PayPal for $4 billion, Honey's Gold rewards programme converts savings into gift cards. Over 17 million active users rely on it to surface deals they would never have found manually. Compared to #3 Rakuten, Honey finds coupons 2× faster on average, and users save an extra 5% per transaction versus searching manually.