Upwork

A large general-purpose freelance marketplace where artists can hire or sell production, session, composition, audio-editing and marketing services.

Best for: Artists hiring specialist help or experienced audio professionals who can package a clear, commercially useful service.
Skip if: You expect music-specific vetting, informal collaboration or high-quality applicants without screening and a precise brief.
First move: For hiring, post one tightly scoped paid test; for freelancing, specialize the profile around one service and three strong samples.
Watch out: Connects and service fees raise acquisition costs, competition is intense and low-quality jobs or applicants require careful screening; avoid moving payment off-platform.
Reach: Mainstream scale
When: Worth it once you are building a team.
Based in: United States