Many threads marketed to quilters actually started as being marketed as embroidery threads, most of which are trilobal polyesters. Among them are Glide and Isacord.
I prefer the shinier finish so I usually opt for a trilobal. If you want a large selection of inexpensive thread for quilting and don't mind the shiny finish, I recommend Metro Embroidery thread.
https://metroemb.com/store/
They have several packages.
https://metroemb.com/store/index.php...ath=72_105_115