CodeFast records 13,640 monthly visits with -63.8% month-over-month growth and Paid pricing. Prolific records 18,697,671 monthly visits with -1.8% growth and Paid pricing.
Learn just enough code to launch a real online business in 14 days
High-quality human data for AI training, evaluation, and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | codefa.st | prolific.com |
| Pricing Model | Paid | Paid |
| Monthly Visits | 13.64K (13,640) | 18.7M (18,697,671) |
| MoM Traffic Delta | -24.04K (-63.8%) | -352.04K (-1.8%) |
| Primary Market & Share | 🇮🇳 India (39.9%) | 🇺🇸 United States (48.8%) |
| Direct Visits / mo | 5.88K | 12.98M |
| User Rating | 4.4 | 4.6 |
| Supported Platforms | Website | Website |
Learn just enough code to launch a real online business in 14 days
Fundamentals, a full SaaS build, and the business side — payments, domains, hosting, SEO — are covered in about twelve hours of video instead of the dozens of hours a conventional JavaScript course spends on topics you will never use.
Rather than theory for interviews, you progressively build a real authenticated, paying SaaS, which is the actual deliverable of the course.
Sections on AI-powered coding and design show how to use AI to explain code, fix bugs and generate parts of your app, framed as leverage on top of fundamentals.
The syllabus includes the non-coding skills that decide whether an app makes money: copywriting essentials, payments with Stripe and LemonSqueezy, domain and DNS setup, hosting and SEO.
High-quality human data for AI training, evaluation, and research
Filter participants by detailed demographic, professional, and behavioural criteria and reach narrow or representative samples rather than a generic crowd.
Collect human preference data for model fine-tuning, run safety evaluations and red-teaming, and use a feedback API to plug humans into automated pipelines.
Attention checks, honesty screening, and approval workflows help filter out careless or fraudulent responses before you analyse results.
Publish a study and begin collecting responses quickly, with tooling that supports screening, quotas, and longitudinal designs.
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
Free / Open-sourceAI engineering courses, certificates, and the world's biggest AI newsletter
Free / Open-sourceAI engineering courses, certificates, and the world's biggest AI newsletter
Free / Open-sourceFree courses, live events and community for building real AI skills
Free / Open-sourceFree courses, live events and community for building real AI skills
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
Enterprise-grade data annotation and AI alignment workforce, but less self-serve for academic study recruitment and casual surveys.
Free / Open-sourceFree AI hackathons and a global community for AI builders
Free / Open-sourceFree AI hackathons and a global community for AI builders
SpecialistAI data infrastructure for building production-grade models
SpecialistAI data infrastructure for building production-grade models
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
Free / Open-sourceFree practical deep learning courses, research and open-source libraries
Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.
Free / Open-sourceOpen-source data labeling and evaluation platform for AI workflows, but requires bringing your own annotation workforce.
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
