Doshi offers briefcases for both men and women. Visit www.doshi.shop
Matt & Nat offers briefcases for men here: https://mattandnat.com/shop/men-s/briefcases/
Tokyo Bags offers unique vegan briefcases here: https://tokyobags.co/vegan-briefcases/
Tough Traveler offers briefcases for both men and women in a wide variety of colors. See: https://toughtraveler.com/collections/briefcases