The same companies, and a host of others, have put their names to a letter requesting that the ban on travel to the US by citizens of seven Muslim-majority countries be rescinded.
The website Politico reported that the cash and services were quietly donated to the Trump administration.
Microsoft contributed US$250,000 in cash and a similar amount in services on 28 December to the Presidential Inauguration Committee, according to federal ethics records.
Google also supplied services, including a live stream on YouTube, apart from a cash donation, sources told Politico.
Amazon similarly handed over cash and supplied services.
None of the three companies responded, when asked for comment by Politico.
Facebook gave no cash but set up a Instagram photo booth and a mini Oval Office for partygoers. Other donations will be known when the inauguration committee reports its fund-raising activities; it has 90 days from 20 January to do so.
The GOP convention last year also attracted tech companies; Microsoft provided US$1.8 million in technology services while Google paid US$500,000 by cheque.
Both Apple and HP did not contribute anything to the convention.
Politico said Uber and Twitter, which had roles in the convention, did not participate in the inauguration. Apple, Oracle and Intel did not respond when asked whether they had made contributions to the inauguration.