CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. clickworker records 1,861,149 monthly visits with +0.5% growth and Contact for Pricing pricing.
Open-source engineering calculators for civil and structural design
Crowdsourcing data services for AI training and market data
| Dimension / Metric | | |
|---|---|---|
| Official Domain | calcforge.com | clickworker.com |
| Pricing Model | Free, Paid | Contact for Pricing |
| Monthly Visits | 31.36K (31,360) | 1.86M (1,861,149) |
| MoM Traffic Delta | -1.56K (-4.8%) | +9.57K (+0.5%) |
| Primary Market & Share | 🇮🇳 India (16.1%) | 🇺🇸 United States (27.6%) |
| Direct Visits / mo | 12.46K | 947.13K |
| User Rating | 4.3 | 3.9 |
| Supported Platforms | Website | Website |
Open-source engineering calculators for civil and structural design
Structural, geotechnical, tunnelling and contractor tools available free and open source on GitHub.
Searchable construction datasets covering high-rise buildings, bridges, tunnels, dams and housing.
Registered users get calculation workings, bending/shear/deflection diagrams and PDF export.
Four project-based pathways in Python, AI for construction, AI governance and building AI agents.
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.
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.
Provides enterprise-grade data annotation and training datasets at scale, but with a more corporate engagement model.
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceFree practical deep learning courses, research and open-source libraries
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.
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Free / Open-sourceFree open course for prompt engineering and AI security
Free / Open-sourceFree open course for prompt engineering and AI security
SpecialistIndependently scored open-source alternatives to paid SaaS
SpecialistIndependently scored open-source alternatives to paid SaaS
Courses and best practices for building AI-powered products end to end
Courses and best practices for building AI-powered products end to end
The bug bounty platform built for AI and ML security
The bug bounty platform built for AI and ML security
