Aether is building a future of molecular manufacturing by designing molecular assemblers using proteins. Their proprietary platform can empirically test millions of protein-reaction combinations to build searchable indexes, enabling the identification of new reaction types. Aether has already identified protein leads for defluorination, antiviral manufacturing, and aramid polymerization. Their goal is to use these molecular assemblers to create novel product lines that address challenges like toxic forever chemicals in drinking water, developing new high-performance materials, and increasing domestic production of strategic metals. Aether is raising $49 million to deploy their first three product lines applying defluorination proteins, novel polymerases, and metal-binding proteins.