In 1999 Weisstein went to work for Wolfram Research, Inc. (WRI), and WRI renamed the Math Treasure Trove to "MathWorld" at http://mathworld.wolfram.com and hosted it on the company's website without access restrictions.
Leta 1998 se je povezal z založniško skupino CRC Press; vsebino spletne strani pa so objavili v tiskani obliki in na CD-ROMu z naslovom »CRC Concise Encyclopedia of Mathematics«.