
Combines shared inboxes and team chat with AI assistance, but feels less optimized for solo speed.
CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. Superhuman records 6,514,241 monthly visits with +7.9% growth and Paid pricing.
Open-source engineering calculators for civil and structural design
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | calcforge.com | superhuman.com |
| Pricing Model | Free, Paid | Paid |
| Monthly Visits | 31.36K (31,360) | 6.51M (6,514,241) |
| MoM Traffic Delta |
| -1.56K (-4.8%) |
| +477.48K (+7.9%) |
| Primary Market & Share | 🇮🇳 India (16.1%) | 🇺🇸 United States (56.8%) |
|---|
| Direct Visits / mo | 12.46K | 4.96M |
|---|
| User Rating | 4.3 | 4.5 |
|---|
| 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 AI productivity suite with agents, email, and docs that work wherever you do
Superhuman Go brings AI agents into the tools and tabs you already use, with inline suggestions and context-aware chat.
Auto drafts, split inbox, auto labels, and auto archive keep your inbox manageable with minimal manual filing.
Collaborative documents that hold text, tables, data, and workflows in one connected surface.
Describe what you need in chat or use a visual builder, then share agents with teammates or a company directory.

Combines shared inboxes and team chat with AI assistance, but feels less optimized for solo speed.
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
#2
Provides a smart inbox and AI writing tools across devices, but offers less advanced custom triage shortcuts.


Delivers cross-platform AI email management with strong privacy focus, but has a more traditional interface.

SpecialistAn AI executive assistant that works across your inbox, calendar and meetings

Free / Open-sourceFree practical deep learning courses, research and open-source libraries

Free / Open-sourceOpen-source database of AI models, prices and capabilities

Offers an AI-native email client with automated summaries and bundles, but lacks Superhuman's extreme speed focus.
Free / Open-sourceFree open course for prompt engineering and AI security

Transforms email threads into conversational chat workspaces with AI summaries, but changes the traditional email layout.

Free / Open-sourceProvides an open-source AI assistant for email sorting and cold email blocking, requiring self-hosting for full control.


SpecialistIndependently scored open-source alternatives to paid SaaS
Combines shared inboxes and team chat with AI assistance, but feels less optimized for solo speed.
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Provides a smart inbox and AI writing tools across devices, but offers less advanced custom triage shortcuts.
Delivers cross-platform AI email management with strong privacy focus, but has a more traditional interface.
SpecialistAn AI executive assistant that works across your inbox, calendar and meetings
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Offers an AI-native email client with automated summaries and bundles, but lacks Superhuman's extreme speed focus.
Free / Open-sourceFree open course for prompt engineering and AI security
Transforms email threads into conversational chat workspaces with AI summaries, but changes the traditional email layout.
Free / Open-sourceProvides an open-source AI assistant for email sorting and cold email blocking, requiring self-hosting for full control.
SpecialistIndependently scored open-source alternatives to paid SaaS