Neosurf is one of a few voucher payments, but one of the only ones that allow withdrawals. Other voucher payments include Astropay and Paysafecard. As with all payment methods, they are not available in all countries.
If you don't want to use a voucher, there are alternative methods including e-wallets, instant banking, credit cards, debit cards and mobile phone payments. Availability will depend on your country.