Practice management software company AbacusNext has been a staple in legal technology through its AbacusLaw and HotDocs products. But now, it is looking to take the next step in its growth with a new investment.

AbacusNext announced today that private equity firm Thomas H. Lee Partners has acquired a majority stake in the company for an undisclosed amount. Previously with private equity firm PSG, the sale to THL places AbacusNext in a diverse portfolio that includes companies from Auction.com to Guaranteed Rate.