There are three types of technology acquisitions:
– Talent. When the acquirer just wants the team (generally just engineers and sometimes designers). As a rule of thumb, these acquisitions are priced at approximately $1M/engineer.
– Tech: When the acquirer wants the technology along with the team. Generally the prices for these acquisitions are significantly higher than talent acquisitions. Sometimes they are even in the hundreds of millions of dollars for fairly small teams (e.g. Siri). The calculation the acquirer uses to price tech acquisitions is usually “buy vs build”. An important component in this calculation is not just the actual cost to build the technology but the opportunity cost of the time it would take them to do so.
– Business: When the company is either bought on a financial basis (the acquisition is “accretive”) or bought based on non-financial but highly defensible assets (Google buying YouTube which had minimal revenue at the time but a huge network of producers and consumers of video).
As large companies mature they move from doing just talent acquisitions to doing talent and tech acquisitions to eventually doing all three types of acquisitions. Usually it takes a startup beating the large company in an important area for the large company to realize the necessity of business acquisitions. For example, Google seemed to dramatically change its attitude when YouTube crushed Google Video. Eventually every large company has a moment like this.