For Jigsaw blades, the Swiss Made Bosch blades seem to have basically become the Worlds standard, or at least that’s what it looks in the USA.
I’m fairly certain most if not all jigsaw blades that you find that are labelled “Swiss Made”, are likely made by Bosch in a factory they own in the Italian section of Switzerland.
In addition to the Bosch branded blades, Skil jigsaw blades were also made in Switzerland, since Bosch owned Skil up until recently, and so were the Vermont American nlades, since Bosch also owns that brand. The Diablo brand is also owned by Bosch, so Diablo jigsaw blades are likely also Swiss Made in the same facility.
In addition to the above Bosch Owned brands,
Milwaukee and Makita jigsaw blades are also now Swiss Made, although in the past the Makita blades were Japanese Made, and the Milwaukee blades might have been US made.
A bunch of other Tool manufacturers also sell rebranded Bosch blades as well.
Basically, you can’t really ho wrong with the Bosch blades.
That said, Lennox and Irwin also sell jigsaw blades, and both may be made in the USA, at least nowadays, since both companies are now both owned by Stanley/Black&Decker.
Lennox is and was known for making quality Hacksaw, Reciprocating Saw, and Jigsaw blades so I don’t see Stanley shutting down that factory.
Stanley/B&D owns the Dewalt brand, so new Dewalt blades that are made in the USA are likely going to be made by Lennox.
Other Dewalt blades are sometimes made in Germany as well, although I’m not sure whether by B&D themselves, or whether they source the blades from an outside factory.
There are other US tooling suppliers that also sell jigsaw blades, but I’m not sure whether they just rebrand blades from Lennox, or whether they produce the blades themselves.
Starrett used to produce jigsaw blades in the USA, along with bandsaw and hacksaw blades, but I think the jigsaw blade production has been moved overseas, maybe to Brazil. The blades where supposedly good though I haven’t tried newer production.
Germany has two major producers of jigsaw blades from what I understand, MPS Sagen, and Wilpu.
MPS Sagen seems to manufacture a much wider variety of jigsaw blades than Wilpu, but both companies have a decent range.
One or both manufacturers also produce rebranded blades for other German tool suppliers, and Power Tool manufacturers, like Fein, Festool, and Metabo.
There is also a tooling supplier in the USA called Spyder that seems to rebrand a small number of specialty jigsaw blades made by MPS Sagen. The Spyder blades are available at Lowes and thru Grainger/Zoro among other suppliers.
There was also another brand in the US that slso seemed to be rebranding the blades from one or the other German manufacturer. Maybe D&N Tools or something like that, although I’m not absolutely sure the brand name.
In addition to the above, there was a French manufacturer that used the brand name “Ultra” that manufactured high quality Jigsaw, bandsaw, and hacksaw blades.
I think the company may have gotten shutdown, and the brand name sold, but if you find the French made blades, they should be quality, and there seems to be stock still around.
Another brand was Eclipse from the UK, which was known for their hacksaw blades.
They also manufacture jigsaw blades, but I’m not sure whether those are still British made, or whether the production has been outsourced to Bosch or other.
Basically though, if the jigsaw blades are Swiss or German or French, they should be decent quality.
There can be different quality levels within the jigsaw blades themselves though.
I think Bosch mostly uses Carbon steel for blades meant for regular wood.
Dewalt at one point seems to be manufacturing some jigsaw blades for wood out of a high speed steel steel like M2, although I’m not sure whether that is still the case. It wood help with durability though.
Blades for metal cutting are where some of the major differences are.
Bimetal blades are usually best for longer use.
High Speed Steel blades are also sold for some of the same cutting tasks, but will have a shorter life expectancy.
There are also carbide toothed blades for cutting laminate, Corian, Carbon Fiber, and materials like Stainless Steel, although the blades are pricey, and usually sold in single packs.
Otherwise, Bosch makes blades for cutting most materials, including several different types of specialty blades for different types of plastics.
Many that was a heavy all metal son of a gun.