Comparing data annotation platforms [D]

Scale AI Highest quality in the industry. But no public pricing and every project requires a sales call. Onboarding takes weeks not days. In June 2025 Meta bought a 49% stake and hired Scale’s CEO as Meta’s Chief AI Officer. Several major customers quietly reduced engagements over data exposure concerns. Worth thinking about if you’re building anything competitive with Meta. Best for: well-funded teams with enterprise security requirements and long timelines. Appen Over 1M contractors across 170 countries. Sounds impressive until you realize it was built for massive long-term projects.