Where are you located? I love to use local/regional seed suppliers that grow their own seed or have other local farmers grow their seed. New Hampshire is a challenging place to garden and using seeds grown in the colder parts of the northeast makes all the difference in getting a successful crop.
In New England/ New York I order from these suppliers.
Fedco Seeds is in Maine. They tell you if the seed was grown organic, eco, or biodynamic. They have a mix of open pollinated and hybrid seeds. They also sell plants, trees, shrubs, tubers, bulbs, and grower supplies.
https://www.fedcoseeds.com/seeds/
Fruition Seeds is in New York They are certified organic. I also love that they sell left handed gardening tools. Their seeds are all open pollinated heirlooms that they encourage you to save the seeds from. I also love their educational blog and videos.
https://www.fruitionseeds.com/shop/product-category/featured/new-for-2022/
Hudson Valley Seeds is also in New York and offer mix of conventional, organic, and Eco grown seeds. They also have cool artwork on the small packages that make great gifts.
https://hudsonvalleyseed.com/ It is a mix of open pollinated and heirlooms so read the descriptions.
High Mowing Seeds in Vermont is also Certified Organic. I don't use them very often but I have had good results from them. The farm I get cream from carries their seed so I will grab a packet or two when I run short on some seed. They have a lot of F1 hybrids so it is not my go to supplier.
https://www.highmowingseeds.com/
If you are not in the northeast you may be able to find smaller regional suppliers in your area.