Guide
SteamDB vs VGInsights vs Gamalytic: what each is for
These tools get mentioned together, but they do different jobs. Knowing which one answers which question saves you from forcing a tool to do work it was never built for.
SteamDB: your numbers and the platform internals
SteamDB is the reference for raw Steam data: price history, app changes, concurrent players, and your own wishlist figure. It tells you what your number is, with precision. What it does not tell you is whether that number is good for a game like yours.
VGInsights and Gamalytic: the market in aggregate
These market-intelligence tools estimate sales and revenue across the Steam catalog and are strong at sizing genres and spotting trends. They answer how the market is doing. They are built around the catalog as a whole, so they are less suited to handing you a verdict on your specific unreleased game.
The gap they leave
None of these is built to answer the question that keeps a developer up before launch: is my number good, and what should I do about it. SteamDB gives you the figure. The market tools give you context on the market. Steamator benchmarks your specific game against comparable titles and returns a verdict, plus a first-week sales range and launch timing.
Use SteamDB for the raw figure, the market tools for trends, and a benchmark when you need to know where your own game stands.
The short version
SteamDB tells you your number. VGInsights and Gamalytic tell you the market. A benchmark tells you whether your number is good.