I joined Contra last year. At that time I was working on Upwork. Later I discovered Contra’s invoicing feature and instantly loved it. I hit a 5k milestone within two months, even though as a solopreneur I only work about two to three hours a day.
It doesn’t charge anything for sending invoices, and there’s no commission on payments. It also has a built-in safeguard so clients can’t request refunds once the invoice is paid.
If you’re just starting your freelancing journey, I’d recommend Upwork or Fiveer. This is just my personal opinion. Contra is better for people who already have a client base and know how to find clients, whether inbound or outbound.