Craftsman sources most of their tools from Apex (formerly Danaher, and these portions were rolled into Apex, which most recently sold to Bain Capital). Think Armstrong for example, as they're also part of Apex, and produce most of the hard line tools (US made, such as wrenches, ratchets, and sockets prior to shifting production to China). Quality has been dropping for some time, including the US made products (high point was in the '90's in terms of quality IME). A few would be sourced from others as well, such as Western Forge for screwdrivers (owned by Ideal), Lisle and a few others here and there. So generally speaking, older Craftsman are more desirable in terms of reliability/quality.
Husky is made by Stanley.
Old (1st gen) Kobalt was made by Williams (currently owned by Snap-On). 2nd gen by Apex IIRC, and currently by a mix of primarily Asian suppliers (couple of US suppliers on singles, while sets tend to be out of China, Taiwan if you're lucky). Screwdrivers would be an example, and the quality differences are notable from what I've seen from the various COO's while browsing the shelves at Lowes.
If you're after alternative brands that are US made that aren't Snap-On prices, you might want to take a look at Wright, Proto, JH Williams (some are US, some are Taiwan, but both are good), and SK (excellent value these days IMHO). Warranty wouldn't be as easy to deal with (likely means physical mail), but you're not likely to break them all that often, especially if you're not abusing them.
Taiwan, Japan, Germany, and Czech Republic (Wera) make some excellent tools as well, and not all are super expensive (Japanese brands seem to be an excellent value IMHO; Rakuten is a good source to get them).
Lots of information over on
Garage Journal if you're interested (DIY'ers & pro mechanics post).