My company bought another company. How long do I keep the purchased company's site live?

[movingbusinessestothecloud]

How long do I wait before redirecting the purchased company's webpages to the equivalent pages on our site? Do I need to keep some sort of announcement about the merger live on their website for a while first?

[ThomasHarvey]

In my opinion, it would be a business decision that's then implemented by the SEO. So ask your bosses these questions and what experience they want for their customers.