"Quoting software" covers everything from a shared spreadsheet to a full quote-to-cash platform. Here's what the category actually does, when a spreadsheet is enough, and what to look for if you're evaluating tools.
At its core, any CNC quoting tool does three things: takes in a part description (a CAD file, a drawing, or manual dimensions), estimates the work that part implies (material removal, setups, finishing, sometimes DFM flags for thin walls or tight tolerances), and applies a cost model (rates, margin, overhead) to produce a price. Where tools differ is in how automatically they extract geometry, how sophisticated the cost model is, and what happens after the quote — PDF generation, customer portals, order tracking, ERP integration.
A spreadsheet is honest and controllable: you built every formula, so you know exactly what it assumes, and it costs nothing beyond the time to build and maintain it. It doesn't scale well past one or two people who understand it, doesn't read a CAD file for you (someone still has to measure and estimate by eye), and turnaround is bounded by whoever's doing the estimating.
Instant quoting tools read geometry directly from a CAD file and apply the cost model automatically, which is faster and more consistent across estimators — but only as good as the geometry takeoff and the cost model behind it. A tool that hides its assumptions is harder to trust than a spreadsheet you built yourself, so the transparency of the model matters as much as the automation.
For shops that need team accounts, ERP integration, and deeper manufacturability analysis, full quote-to-cash platforms exist — Paperless Parts is one well-known example — and are worth evaluating on their own terms. cncquoter sits below that: the quoting tool is free and runs in your browser with nothing uploaded, and cncquoter Pro ($39/mo) adds a saved shop profile, branded PDF quotes, and an instant-quote page for your website that sends RFQs to your inbox. Try the free tool first.