# CalcForge vs huntr CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. huntr records 45,283 monthly visits with -61.9% growth and Free pricing. | Metric | [CalcForge](https://openaitools.app/tool/calcforge) | [huntr](https://openaitools.app/tool/huntr-com) | | :--- | :--- | :--- | | Website URL | https://calcforge.com | https://huntr.com | | Categories | Open Source AI Models, AI Developer Tools, AI Knowledge Base | AI Developer Tools, Open Source AI Models, AI Models | | Pricing Model | Free, Paid | Free | | Monthly Visits | 31,360 | 45,283 | | MoM Growth Rate | -4.8% | -61.9% | | Primary Market | India | United States | | Direct Visits | 12,460 | 22,903 | | Review Score | 4.3 | 4.3 | | Saved Count | 0 | 2 | | Supported Platforms | Website | Website | ## CalcForge CalcForge is a community-built engineering platform that combines a large library of free, open-source calculators with professional training pathways for civil and structural engineers. The toolkit spans structural analysis (beam, frame, truss, steel and concrete section design), geotechnical work (bearing capacity, slope stability, retaining walls, foundation settlement), tunnelling, and contractor tools such as formwork, scaffolding and slope grading. It also ships curated construction datasets covering high-rise buildings, bridges, tunnels, dams and housing. The free tier gives registered users full calculation workings, bending/shear/deflection diagrams and PDF export, while the one-time Lifetime All-Access pass unlocks advanced calculators, code templates and enrolment in four training qualifications. The project grew out of Civils.ai and is supported by an active Discord community of around 1,500 engineers across 30+ countries. Because the tools are open source on GitHub, engineers can fork the code, add their own calculators and send pull requests back to the main project. CalcForge positions itself as a way to democratise engineering knowledge and to help professionals automate the most time-consuming parts of their work. **Pricing & Plans:** Free account with core engineering tools and datasets; one-time Lifetime All-Access payment unlocks 32+ advanced calculators, 10,000+ construction datasets, code repositories and four training qualifications. - **50+ open-source calculators:** Structural, geotechnical, tunnelling and contractor tools available free and open source on GitHub. - **Datasets for benchmarking:** Searchable construction datasets covering high-rise buildings, bridges, tunnels, dams and housing. - **Full workings and diagrams:** Registered users get calculation workings, bending/shear/deflection diagrams and PDF export. - **Professional certifications:** Four project-based pathways in Python, AI for construction, AI governance and building AI agents. - **Community collaboration:** A Discord community of 1,500+ engineers sharing calculators, ideas and contributions. **Strengths:** Genuinely free and open source for the core calculator library; Broad coverage from structural analysis to tunnelling and contractor tools; Rare combination of tooling plus structured training certifications; Active community and transparent GitHub contributions **Limitations:** Advanced calculators and datasets sit behind the paid lifetime pass; Code snippets and some datasets are not available on the free tier; Advanced training materials are geared to construction rather than general software fields [Profile (Markdown)](https://openaitools.app/tool/calcforge.md) ## huntr huntr takes the mechanics of a bug bounty marketplace and points them at artificial intelligence and machine learning. Rather than chasing generic web vulnerabilities, hunters pick a challenge, review its rules, and try to break a specific AI assistant, agent or model artifact: convincing a claims assistant to leak a hidden token, getting a stock-trading agent to perform unauthorized trades, or slipping past the guardrails of an assistant designed to keep a secret. Each challenge has clear objectives and a prize pot, and progress is reflected in a public leaderboard ranking. The workflow is deliberately simple and transparent: choose a battle, move up the leaderboard, win cash. Participants compete over a fixed window, then results and writeups are published, so techniques spread across the community. Featured challenges on the site have carried pots in the range of $15,000. The platform also runs an active blog covering LLM jailbreaks, prompt-injection style bypasses and zero-day intelligence in AI/ML components, including work on Keras model deserialization and TensorFlow Lambda exploits. huntr is free for researchers to use and is supported by Palo Alto Networks and Prisma AIRS, its AI security platform. That sponsorship structure matters: huntr functions both as a community hunting ground and as a channel for surfacing real vulnerabilities in the AI supply chain, which organizations can then remediate. There is also a Discord community and a FAQ for participants. **Pricing & Plans:** Free - **AI/ML-focused challenges:** Time-boxed hacking challenges targeting LLM assistants, agentic systems and model artifacts, each with explicit objectives and rules. - **Cash prize pots and leaderboards:** Compete over a fixed window to climb public rankings and win real cash prizes for top placements. - **Published results and writeups:** After a challenge closes, outcomes and techniques are shared so the community can learn from each exploit. - **Model and library vulnerability hunting:** Research coverage extends to ML supply chain targets such as Keras model deserialization and TensorFlow Lambda exploits. - **Community and knowledge base:** Discord server, blog and FAQ support researchers from first challenge through advanced rankings. **Strengths:** Purpose-built for AI/ML security rather than repurposed web bug bounties; Real cash prizes with a transparent, gamified leaderboard; Backed by Palo Alto Networks and Prisma AIRS; Public writeups turn each challenge into a learning resource **Limitations:** Rewards are concentrated in the top ranks of each challenge; Challenge availability rotates, so there are windows with limited targets; Focus on competition means less emphasis on long-running private disclosure programs [Profile (Markdown)](https://openaitools.app/tool/huntr-com.md) ## Frequently Asked Questions ### How do CalcForge and huntr compare in monthly traffic? CalcForge has 31,360 monthly visits, while huntr has 45,283. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? CalcForge has a month-over-month growth rate of -4.8%; huntr has -61.9%. ### How does pricing compare? CalcForge: Free, Paid. Free account with core engineering tools and datasets; one-time Lifetime All-Access payment unlocks 32+ advanced calculators, 10,000+ construction datasets, code repositories and four training qualifications. huntr: Free. 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