Dell has agreed to buy Quest Software, which makes programs to manage corporate computer systems, for $28 a share, ending a bidding contest with Insight Venture Partners.

Quest Software, which makes tools to help companies manage computer systems, has accepted a sweetened $2.17bn (€1.73bn) $25.75-a-share bid from Insight Venture Partners and agreed to the addition of Vector Capital to the buyout group.

Insight Venture Partners topped a $25.50-a-share bid that Quest Software received from an unidentified suitor, intensifying a takeover battle for the software maker, according to a person familiar with matter.