We check every product on this page once a day and record whether it still answers.
An AI price-comparison search engine that scans retailers and direct-from-factory sources to find lower prices, free with no signup required.
FreeNo sign-up
What to know▼
How it works
An AI engine that scans global marketplaces, comparing verified US retailers against direct-from-factory sources, tracks price drops, aggregates trending deals and finds coupons.
What's different
Compares verified US retailers with direct-from-factory sources rather than just retailer-to-retailer prices.
Pricing
Free, no signup.
Best for
Shoppers looking for the lowest price on a product across multiple sourcing options.
We check every product on this page once a day and record whether it still answers.
Self-hosted, open-source monitoring for cameras and IoT sensors — footage stays on your own hardware while a hosted portal just handles remote access — a free alternative to Frigate, Blue Iris and Shinobi.
FreeOpen sourceSelf-hosted
What to know▼
How it works
An open-source Java agent turns cameras, sensors and physical systems into one automated setup using ONVIF/RTSP, Modbus and MQTT, with detection via YOLO or Gemini AI; a hosted portal provides remote access over WebRTC.
What's different
Video and sensor data stay on your own hardware — the hosted portal only handles connection and billing, unlike cloud-based VMS platforms.
Pricing
Free Community plan.
Best for
People self-hosting camera and IoT sensor monitoring who want an alternative to Frigate, Blue Iris or Shinobi.
We check every product on this page once a day and record whether it still answers.
Over 100 free business calculators — profit margins, OEE, SIP, burn rate, income tax across 9 markets — no sign-up required. For ecommerce sellers and founders who'd otherwise reach for a spreadsheet.
FreeNo sign-up
What to know▼
How it works
Over 100 free calculators and simulators for financial planning and business operations — profit margins, overall equipment effectiveness, SIP, burn rate, and income tax — with country auto-detection adapting currency, tax labels and formats across 9 markets including the US.
What's different
Free with no sign-up required, backed by real domain logic like actual fee schedules and ISO manufacturing standards rather than generic formulas.
Pricing
Free, no sign-up required.
Best for
Ecommerce sellers, manufacturers and founders who currently make financial decisions on gut feeling or a spreadsheet.
We check every product on this page once a day and record whether it still answers.
207 free browser-based calculators for manufacturing and industrial work, in 10 languages.
FreeNo sign-upNo ads
What to know▼
How it works
Provides 207 calculators for manufacturing and industrial work covering quality, metal, chemical, electronics and safety, running entirely in the browser.
Pricing
Free forever.
Best for
Manufacturing and industrial workers, available in 10 languages.
