Formation records 81,461 monthly visits with -1.2% month-over-month growth and Paid pricing. Prolific records 18,697,671 monthly visits with -1.8% growth and Paid pricing.
Adaptive interview prep and mentorship for experienced software engineers
High-quality human data for AI training, evaluation, and research
| Dimension / Metric | | |
|---|---|---|
| Official Domain | formation.dev | prolific.com |
| Pricing Model | Paid | Paid |
| Monthly Visits | 81.46K (81,461) | 18.7M (18,697,671) |
| MoM Traffic Delta | -959 (-1.2%) | -352.04K (-1.8%) |
| Primary Market & Share | 🇺🇸 United States (59.3%) | 🇺🇸 United States (48.8%) |
| Direct Visits / mo | 62.44K | 12.98M |
| User Rating | 4.3 | 4.6 |
| Supported Platforms | Website | Website |
Adaptive interview prep and mentorship for experienced software engineers
Practice recalibrates each session, getting harder as you improve so hours go where your target rounds demand.
Get matched with mentors and hiring managers who run interviews at the companies you're targeting.
Prepare for data structures and algorithms, system design, AI-assisted coding, behavioral rounds, and more.
Solo, one-on-one, or small-group mocks plus career coaching and negotiation support.
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.
Agentic skills intelligence for hiring, developing, and planning talent
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.
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-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.
Real-time, invisible AI interview and coding assistant
Real-time, invisible AI interview and coding assistant
Free / Open-sourcePractice job interviews with AI-generated questions and instant feedback
Free / Open-sourcePractice job interviews with AI-generated questions and instant feedback
SpecialistAI-led customer interviews and research insights at scale
SpecialistAI-led customer interviews and research insights at scale
Free / Open-sourcePractice real interview questions and get AI feedback before the big day
Free / Open-sourcePractice real interview questions and get AI feedback before the big day
