Full Custom Makers (some also sell their own standard backpacks)

• Voyager Bag Works (USA 🇺🇸)
• Innes Bags (Slovakia 🇸🇰)
• Arch Indy (Italy 🇮🇹)
• Azo Equipment (United Kingdom 🇬🇧)
• Stocy Project (Hungary 🇭🇺)
• C+ Sewing (Hongkong 🇭🇰)
• Rucksack Village (Japan 🇯🇵)

Semi-Custom Makers (Customisation of elements of their standard bags)

• Truce Designs (USA 🇺🇸)
• Optimal Thread Works (USA 🇺🇸)
• Rehose (Czech Republic 🇨🇿)
• Packolab (Ukraine 🇺🇦)
• Greenroom136 (Malaysia 🇲🇾)

Mods to exisisting bags only

• Skywalker Designs (USA 🇺🇸)