clickworker records 1,861,149 monthly visits with +0.5% month-over-month growth and Contact for Pricing pricing. StackRef records 765 monthly visits with +184.4% growth and Contact for Pricing pricing.
Crowdsourcing data services for AI training and market data
Senior cloud, DevOps and security consulting plus a self-hosted hackathon manager
| Dimension / Metric | | |
|---|---|---|
| Official Domain | clickworker.com | stackref.com |
| Pricing Model | Contact for Pricing | Contact for Pricing |
| Monthly Visits | 1.86M (1,861,149) | 765 (765) |
| MoM Traffic Delta | +9.57K (+0.5%) | +496 (+184.4%) |
| Primary Market & Share | 🇺🇸 United States (27.6%) | 🇮🇩 Indonesia (100%) |
| Direct Visits / mo | 947.13K | 305 |
| User Rating | 3.9 | 4 |
| Supported Platforms | Website | Website |
Crowdsourcing data services for AI training and market data
Custom image, video, audio and text datasets with human labeling, annotation and validation, delivered with parent company LXT.
Registered freelancers in 136 countries fill microtasks through web, Android and iOS apps, with flexible scaling up or down.
An all-in-one survey tool plus access to a verified respondent pool for external studies and targeted insights.
Real-time point-of-sale data collection, display audits, mystery checks, and usability testing for websites, apps and games.
Senior cloud, DevOps and security consulting plus a self-hosted hackathon manager
Hands-on architecture, security, and cost optimization across AWS, GCP, and Azure, led by a CISSP-certified architect with 20+ years of experience.
Focused engagements on hardening cloud environments and supporting compliance, with an emphasis on robust, well-governed infrastructure.
Practical work to reduce cloud spend and right-size infrastructure without sacrificing reliability.
A self-designed, self-hosted, end-to-end internal hackathon manager covering sandbox environments and AI scoring to run innovation events.
Offers a high-quality pool of verified human participants for research and preference tuning, but is less focused on traditional data annotation.
Offers a high-quality pool of verified human participants for research and preference tuning, but is less focused on traditional data annotation.
Connects subject matter experts for advanced LLM training and prompting, but lacks general microtask crowdsourcing capabilities.
Connects subject matter experts for advanced LLM training and prompting, but lacks general microtask crowdsourcing capabilities.
Specializes in matching AI labs with vetted human experts for RLHF, but offers fewer general data annotation services.
Specializes in matching AI labs with vetted human experts for RLHF, but offers fewer general data annotation services.
Free / Open-sourceGoogle's batteries-included framework for scalable web apps
Provides enterprise-grade data annotation and training datasets at scale, but with a more corporate engagement model.
Focuses on elite domain experts for complex RLHF and frontier AI evaluation, but lacks casual crowdsourcing tasks.
Focuses on elite domain experts for complex RLHF and frontier AI evaluation, but lacks casual crowdsourcing tasks.
SpecialistLow-smoke, halogen-free rigid PVC conduit for safer electrical containment
SpecialistLow-smoke, halogen-free rigid PVC conduit for safer electrical containment
SpecialistOffers powerful AI-assisted data annotation software and managed labeling, but lacks general crowdsourced web surveys and microtasks.
SpecialistOffers powerful AI-assisted data annotation software and managed labeling, but lacks general crowdsourced web surveys and microtasks.
Free / Open-sourceA curated directory, leaderboard, and newsletter for discovering AI tools
Free / Open-sourceOpen AI research for everyone — datasets, models and tools, free for all
Free / Open-sourceOpen AI research for everyone — datasets, models and tools, free for all
Delivers custom human-in-the-loop data collection and annotation services, but lacks clickworker's self-serve microtask crowdsourcing portal.
Delivers custom human-in-the-loop data collection and annotation services, but lacks clickworker's self-serve microtask crowdsourcing portal.
SpecialistTurn human expertise into frontier-grade AI training data
SpecialistTurn human expertise into frontier-grade AI training data
