Sepal AI
Broad/Unclear specialization
Quick facts
- Company
- Sepal AI
- Service type
- Data annotation / AI training data
- Specialties
- Text
- Hiring status
- Both: hires workers and takes vendor projects
- Website
- sepal.ai
- Profile last verified
- 2026-01-29
Application process overview
Sepal AI is an expert-data company providing advanced training data for frontier labs, focused on high-skill domains like STEM, coding, medicine, and law. It recruits specialists (often with graduate degrees) to write, review, and evaluate model outputs, competing with Scale, Surge, and Mercor. Onboarding is application-based with screening.
Key findings
Application Process: Online application at sepal.ai; candidates submit credentials and domain expertise, followed by targeted assessments.<br><br>Assessments: Domain-specific writing/coding tests and sample tasks; rigorous vetting by area (e.g., PhD-level math, competitive-programming coding).<br><br>Job Types / Expertise: RLHF prompt/response authoring, coding tasks, math proofs, medical/legal reasoning, expert review.<br><br>Compensation: Reportedly $30-$150+/hr depending on expertise tier, with top PhD reviewers at the high end; paid as contractor.<br><br>Flexibility: Remote, asynchronous, project-based workloads.<br><br>Challenges / Concerns: Task volume fluctuates with lab demand; strict quality bars and possible deactivation for low scores; limited public footprint.<br><br>Legitimacy: Venture-backed, active LinkedIn hiring, clients among major AI labs; appears legitimate though newer than peers.
Conclusion
Sepal AI is a credible entrant in the expert-data space paying well above mainstream annotation rates, but only if you meet the specialist bar. Non-experts will likely be filtered out. For qualified PhDs or senior engineers it is worth applying alongside Surge, Mercor, and Scale. Expect inconsistent task flow and high quality standards. A legitimate premium platform, narrow in who it accepts.