Estimated monthly website visits
Similarweb estimates for this domain, not active users. Only available observation months are shown; collection date is separate from the traffic period.
Collected Nov 10, 2026
This is our editors' assessment out of 5, not an average of user ratings. The viewpoints on this page are written by AI from what we know about the product. They are not customer reviews.
According to OpenAITools.app telemetry verified on 2026-11-10, Outlier AI (outlier.ai) is an AI platform indexed under AI Jobs (ranked #90 globally) generating 10.37M monthly visits with a month-over-month traffic delta of +736.51K (+7.6%). Its primary geographic market is United States (21.6% traffic share), and it operates on a Paid pricing model. Top competing alternatives by monthly volume include Surge AI (245.14K visits/mo), Mercor (14.16M visits/mo), OpenTrain AI (1.47M visits/mo).
Good side income if you have niche coding or math skills.
Projects get paused out of nowhere all the time.
Pay rates are decent but queue management is messy.
Legit remote work for domain experts.
AI-synthesized perspectives grounded in live site inspection, pricing structure, and category benchmarks — presented as editorial viewpoints rather than individual customer testimonials.
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.
Contributors build hands-on prompt-engineering and evaluation experience that carries into AI and data roles.
Outlier AI is a work platform built around the idea that human expertise is still the fastest way to make AI models better. Professionals in fields such as software engineering, mathematics, physics, medicine and dozens of languages sign up, verify their skills, and are matched with projects where they write difficult prompts, build answer rubrics and grade model outputs. Because the work is project-based and fully remote, contributors set their own hours with no minimum commitment.
The platform reports more than 900,000 experts onboarded and over $500 million paid out to contributors across 50 countries, with a large share of participants being graduate students and PhDs. Typical accounts describe a 30 to 90 minute onboarding flow covering account creation, expertise selection, skill screening and identity verification, after which project-specific training begins.
Outlier is part of the Scale AI family of data-labeling businesses, so the projects generally feed into real model-development pipelines rather than academic exercises. Pay is competitive and quality-based, disbursed weekly, and contributors sometimes get free access to paid frontier models as part of their work. Because project availability fluctuates, income is best treated as flexible supplementary earnings rather than a guaranteed full-time salary.
Turn domain expertise into paid remote work that fits around lab schedules and coursework.
Write challenging programming problems and evaluate model-generated code for correctness and style.
Apply native fluency to translation, fluency and cultural-relevance evaluation for models serving new languages.
Doctors, lawyers, physicists and other specialists help grade complex reasoning that generalist annotators cannot assess.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | Outlier AI | 10.37M | +7.6% | 56% direct | Paid | Current |
| 1 | Surge AI Provides enterprise-grade human data and RLHF evaluation, connecting expert annotators with leading AI labs. | 245.14K | +6.6% | 53% direct | Contact for Pricing | vs Surge AI |
| 2 | Mercor Matches vetted domain experts with remote AI training and engineering roles using AI-driven vetting. | 14.16M | +34% | 53% direct | Contact for Pricing | vs Mercor |
| 3 | OpenTrain AI Connects AI research labs with human subject matter experts for specialized evaluation and data annotation tasks. | 1.47M | +11.2% | 41% direct | Contact for Pricing | vs OpenTrain AI |
| 4 | Appen Established enterprise data annotation provider offering large-scale human validation and alignment services for AI models. | 665.84K | +0.2% | 36% direct | Contact for Pricing | vs Appen |
| 5 | clickworker Offers crowdsourced data collection and annotation services, operating on a broader task-based crowdsourcing model. | 1.86M | +0.5% | 51% direct | Contact for Pricing | vs clickworker |
| 6 | Ocular AI Operates as a specialized data foundry converting expert human knowledge into specialized post-training datasets. | 8.85K | +100.6% | 41% direct | Freemium, Contact for Pricing | vs Ocular AI |
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.
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.
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.
Established enterprise data annotation provider offering large-scale human validation and alignment services for AI models.
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.
SpecialistOperates as a specialized data foundry converting expert human knowledge into specialized post-training datasets.
SpecialistOperates as a specialized data foundry converting expert human knowledge into specialized post-training datasets.
SpecialistTalent marketplace connecting companies with vetted applied AI professionals rather than task-based annotators.
SpecialistTalent marketplace connecting companies with vetted applied AI professionals rather than task-based annotators.
SpecialistFocuses on security challenges and bug bounties for AI models and libraries instead of general data labeling.
SpecialistFocuses on security challenges and bug bounties for AI models and libraries instead of general data labeling.
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.
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.
SpecialistProvides custom enterprise AI consulting and development services rather than crowd-sourced annotation tasks.
SpecialistProvides custom enterprise AI consulting and development services rather than crowd-sourced annotation tasks.
