Alphabet Inc. is in talks to purchase the cloud security company Wiz for $33 billion, restarting deal discussions that were called off last summer after extended negotiations, according to people familiar with the matter.

The deal, which could be announced as soon as Tuesday, would bolster the cybersecurity offerings for Alphabet’s Google Cloud and provide it with a crucial marketing boost to compete against its larger cloud competitors, Amazon.com Inc.’s Amazon Web Services and Microsoft Corp.’s Azure.