- KeyCall
- Keyhole Publishing
- Keyman
- Pair: Meet People・Make Friends
- Keys AI Texting Coach
- Keystone: Social Habit Tracker
- KeyWe - How People Meet
- KF Lounge
- KF身心靈轉運站
- KG Schweinheim e.V.
- Khair Plus - خير بلس
- Khandeh (خنده)
- Khatma ختمة
- KHEA Radio
- Khedoo - Meet & Date Africans
- Khitmah - الختمة الجماعية
- Khitmitna - ختمتنا
- KHM 난방박사
- Khmer Emergency Phone Numbers
- KhmerPark
- KhmerPark
- Khoolood Obituary News
- Khoros Capture
- Khoros Care
- Khoros Marketing
- Khronos Condomínios
- Khronos Family
- Khu Bảo Tồn Biển
- KHWE
- KiApp 2021
- Selbsthilfe KIBIS Stormarn SH
- KICK ID
- Kick-Off
- Kick.vn - Chia Sẻ Tâm Sự
- KickApp - Football chat app
- KickChat
- Kickoff – Meet people your friends know
- Joaka - Rezervă teren de sport
- Kicks n Sticks