There are a bunch of Nepali Matrimonial sites. The List of Nepali Matrimonial sites is given below.
1. Hamromilan : Nepal's No 1 Matrimonial & Dating website [Usage : Completely Free]
Hamromilan was launched in 2015 & has been providing free matrimonial service since then.
2. NepaliVivah : [They charge money for membership]
3. NepalMatrimonial : [They charge money for membership]
4. Nepallove : [This has been in the internet for some time, but hasn't been that effective.]
There are few others but most of them are not that functional. If you are looking for a free matrimony then Hamromilan is obviously your choice. If you want to pay with your credit card, you may try other matrimonial sites as well. The choice ultimately remains at your hand.