Outlier AI records 10,372,036 monthly visits with +7.6% month-over-month growth and Paid pricing. TestDriver records 10,353 monthly visits with +7.1% growth and Free Trial, Paid, Contact for Pricing pricing.
Get paid to train the next generation of AI models
AI code review that runs your app on every pull request
| Dimension / Metric | | |
|---|---|---|
| Official Domain | outlier.ai | testdriver.ai |
| Pricing Model | Paid | Free Trial, Paid, Contact for Pricing |
| Monthly Visits | 10.37M (10,372,036) | 10.35K (10,353) |
| MoM Traffic Delta | +736.51K (+7.6%) | +688 (+7.1%) |
| Primary Market & Share | 🇺🇸 United States (21.6%) | 🇺🇸 United States (64.8%) |
| Direct Visits / mo | 5.82M | 4.09K |
| User Rating | 3.8 | 4.4 |
| Supported Platforms | Website | Website |
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.
AI code review that runs your app on every pull request
TestDriver reviews every pull request automatically, reads the diff with its vision agent, and generates end-to-end tests straight from the PR content to prove the new behavior works.
Tests run your actual application in a real desktop sandbox—clicking, typing and reading the screen—so they catch runtime and visual bugs, not just code diffs.
When the UI shifts and a cached element no longer matches, the AI finds it again, updates the cache and continues, so tests survive redesigns without rewrites.
Once a test passes, TestDriver opens a fresh pull request with the generated Vitest test code committed, so coverage lands in your repo alongside the change it protects.
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.
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.
GenAI-native end-to-end QA agent that plans, writes and heals tests in plain language
All-in-one AppSec platform that finds and auto-fixes vulnerabilities
All-in-one AppSec platform that finds and auto-fixes vulnerabilities
Established enterprise data annotation provider offering large-scale human validation and alignment services for AI models.
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.
AI-native offensive security: continuous red teaming, white-box pentests, and PR review
Agentic end-to-end testing that writes, runs and heals your test suite
Agentic end-to-end testing that writes, runs and heals your test suite
AI code review and status updates that keep every repo on track
AI code review and status updates that keep every repo on track
