Upwork

Upwork operates an online marketplace connecting businesses with independent professionals and freelancers across fields such as writing, design, programming, marketing, and consulting. Clients post projects or hourly roles, then review proposals, portfolios, and profiles to select talent suited to their needs. Freelancers create profiles showcasing skills, work history, and client feedback to bid on available jobs. The platform handles contracts, time tracking, invoicing, and secure payment processing, including escrow-based milestone payments for fixed-price work. Additional services include talent scouting through Upwork's staffing arm, skills testing, and enterprise solutions for companies managing large contingent workforces.