As part of the deal, certain funds of NB Renaissance will invest new equity in the company alongside Bain, while Apax will exit its position in Engineering in full.
The process for the software company, which provides technology for board members and senior executives, is kicking off now.
Apax hopes to command a price for the stake sale that assigns ECi a total valuation of $2.5 billion, a source said.
Vista Equity and Insight Partners struck 22 tech deals each through December