CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. Whimsical records 966,895 monthly visits with -18.7% growth and Freemium pricing.
Open-source engineering calculators for civil and structural design
The collaborative whiteboard built for product builders
| Dimension / Metric | | |
|---|---|---|
| Official Domain | calcforge.com | whimsical.com |
| Pricing Model | Free, Paid | Freemium |
| Monthly Visits | 31.36K (31,360) | 966.9K (966,895) |
| MoM Traffic Delta | -1.56K (-4.8%) | -222.85K (-18.7%) |
| Primary Market & Share | 🇮🇳 India (16.1%) | 🇮🇳 India (19%) |
| Direct Visits / mo | 12.46K | 602.36K |
| User Rating | 4.3 | 4.7 |
| 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.
The collaborative whiteboard built for product builders
AI Flowcharts, AI Mind Maps and AI Wireframes convert a short text prompt into structured, fully editable diagrams, branched mind maps, or web and mobile wireflows — no manual drawing required.
Boards host diagrams, flowcharts, mind maps, wireframes, embedded media and documents side by side, so a whole product narrative lives in a single shareable file.
Multiple teammates edit the same board simultaneously with live cursors, thread comments attached to specific objects, and mention-based notifications.
Drag-and-drop UI components let teams sketch screens, link them into clickable flows and iterate on product ideas before engineering commits to a build.
Industry standard collaborative whiteboarding with massive template libraries, but less streamlined for rapid AI diagram generation.
Industry standard collaborative whiteboarding with massive template libraries, but less streamlined for rapid AI diagram generation.
Free / Open-sourceCombines mind mapping and project workflows with AI agents, but less focused on pure visual diagramming and wireframes.
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Robust collaborative whiteboard with strong AI diagramming tools, but less polished UI wireframing capabilities than Whimsical.
Robust collaborative whiteboard with strong AI diagramming tools, but less polished UI wireframing capabilities than Whimsical.
Free / Open-sourceFree practical deep learning courses, research and open-source libraries
Dedicated diagramming platform with strong AI chart generation, but less focus on freeform collaborative brainstorming whiteboards.
Dedicated diagramming platform with strong AI chart generation, but less focus on freeform collaborative brainstorming whiteboards.
SpecialistInstantly turns natural language prompts into mind maps and flowcharts, but offers less freeform canvas drawing flexibility.
SpecialistInstantly turns natural language prompts into mind maps and flowcharts, but offers less freeform canvas drawing flexibility.
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Combines whiteboarding and documentation with AI generation, but lacks Whimsical's specialized wireframe shape library.
Combines whiteboarding and documentation with AI generation, but lacks Whimsical's specialized wireframe shape library.
Exceptional UI wireframing and prototyping tools, but less versatile for general mind mapping and freeform brainstorming.
Exceptional UI wireframing and prototyping tools, but less versatile for general mind mapping and freeform brainstorming.
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
