Iirc bluebrixx use gobricks which are easily comparable to Lego. Mould King do too and also produce a lot of their own sets, bigger and cheaper than Lego. I’m also a fan of JieStar, clutch can be a bit tighter, but the quality is fine - Reobrix use JieStar and make some great original sets.
Not even counterfeits, there are competing legitimate companies, like BlueBrixx, which are cheaper.
Iirc bluebrixx use gobricks which are easily comparable to Lego. Mould King do too and also produce a lot of their own sets, bigger and cheaper than Lego. I’m also a fan of JieStar, clutch can be a bit tighter, but the quality is fine - Reobrix use JieStar and make some great original sets.