Codeaid records 2,647 monthly visits with -36% month-over-month growth and Freemium pricing. Outlier AI records 10,372,036 monthly visits with +7.6% growth and Paid pricing.
Coding assessments built for AI and ML engineers
Get paid to train the next generation of AI models
| Dimension / Metric | | |
|---|---|---|
| Official Domain | codeaid.io | outlier.ai |
| Pricing Model | Freemium | Paid |
| Monthly Visits | 2.65K (2,647) | 10.37M (10,372,036) |
| MoM Traffic Delta | -1.49K (-36%) | +736.51K (+7.6%) |
| Primary Market & Share | 🇺🇸 United States (94.1%) | 🇺🇸 United States (21.6%) |
| Direct Visits / mo | 1.04K | 5.82M |
| User Rating | 4.1 | 3.8 |
| Supported Platforms | Website | Website |
Coding assessments built for AI and ML engineers
Challenges are generated per domain rather than pulled from a generic pool, covering deep learning, generative AI, NLP and computer vision alongside traditional ML.
The AI Interviewer helps create tailored assessments from expert-designed templates or from scratch, adjusting difficulty and scope in minutes.
Candidates work in interactive notebooks or containerised environments, so the test reflects how AI work is actually done rather than a whiteboard puzzle.
Submitted work is analysed automatically, with scoring on model accuracy and code quality, producing structured evaluation results.
Get paid to train the next generation of AI models
After skill screening, contributors are matched to projects that fit their domain, from coding and math to linguistics and medicine.
No minimum hours and fully remote work, so experts can fit tasks around study, research or a primary job.
Typical work includes writing hard prompts, producing grading rubrics, ranking competing answers and reviewing model reasoning.
Contributors are paid for approved work each week, with rewards that scale with the quality of their output.
Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.
Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting.
The agent recruits, you manage talent
Offers crowdsourced data collection and annotation services, operating on a broader task-based crowdsourcing model.
Offers crowdsourced data collection and annotation services, operating on a broader task-based crowdsourcing model.
Connects AI research labs with human subject matter experts for specialized evaluation and data annotation tasks.
Connects AI research labs with human subject matter experts for specialized evaluation and data annotation tasks.
Agentic skills intelligence for hiring, developing, and planning talent
Skills-based hiring platform for technical interviews, assessments and live coding
Skills-based hiring platform for technical interviews, assessments and live coding
Established enterprise data annotation provider offering large-scale human validation and alignment services for AI models.
AI-powered candidate matching inside Arc's vetted remote-talent marketplace
AI-powered candidate matching inside Arc's vetted remote-talent marketplace
SpecialistHosts AI hackathons and community building events rather than freelance data annotation work.
SpecialistHosts AI hackathons and community building events rather than freelance data annotation work.
Provides enterprise-grade human data and RLHF evaluation, connecting expert annotators with leading AI labs.
Provides enterprise-grade human data and RLHF evaluation, connecting expert annotators with leading AI labs.
Free / Open-sourceLarge open community hub for data science and machine learning practitioners to collaborate and network.
Free / Open-sourceLarge open community hub for data science and machine learning practitioners to collaborate and network.
Interviews on demand, AI-driven or expert-led
