The best alternatives to Atomicons are Feather, Google Fonts, and Untitled UI Icons. If these 3 options don't work for you, we've listed a few more alternatives below.
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Feather is a collection of simply beautiful open source icons. Each icon is designed on a 24x24 grid with an emphasis on simplicity, consistency and readability.
Google LLC is an American multinational technology company that specializes in Internet-related services and products, which include online advertising technologies, search engine, cloud computing, software, and hardware.
Untitled UI Icons are the ultimate free icon library for Figma. A clean, consistent, and neutral icon library crafted specifically for modern UI design. Made for Figma, in Figma.
Never pay for icon sets or subscriptions again, this bundle with free lifetime updates has it all. ✔ All icons in AI, EPS, SVG, PDF, PNG & IconJar ✔ Low intro price (and 30% off for PH) ✔ Commercial license; Use in an unlimited number of commercial projects
Tabler icons is an open source project, published under MIT license. A set of over 300 vector icons, which you can use in your private and commercial projects. Each icon is designed on a 24x24 grid and a 2px stroke.