Hillary Clinton rebuffed the efforts of Silicon Valley big shots and executives at powerhouse tech companies such as Microsoft and Facebook to help get her elected out of 'hubris', claims a former Apple boss.

Guy Kawasaki, a venture capitalist and entrepreneur who was one of Apple's original marketing chiefs, supported Hillary in the 2016 presidential election after he was impressed with her 'intelligence and sense of humor' while attending one of her fundraisers in Los Altos, California in 2015.

The 65-year-old said he noticed some areas of improvement her campaign could make and reached out on three separate occasions offering his help but was shot down each time, he writes in his upcoming book Wise Guy.

Former Apple boss Guy Kawasaki said Hillary Clinton's campaign turned down his offer of help on three separate occasions, he writes in his upcoming book Wise Guy

The 65-year-old supported Hillary in the 2016 presidential election after he was impressed with her intelligence and sense of humor while attending one of her fundraisers in Los Altos, California in 2015. Pictured: Kawasaki with his family at the fundraiser

Kawasaki said executives at Microsoft and Facebook told him they wanted to help Hillary 'above and beyond their job responsibilities' but they were also snubbed in an 'attitude akin to hubris'.

The Stanford and UCLA graduate speculates that if Hillary's team had accepted the wealth of assistance coming from the likes of him and tech giants, as the Trump campaign was doing, 'the results might have well been different.'

While Kawasaki claims that Hillary refused personal help from tech executives, her campaign received millions of dollars in donations from Silicon Valley companies, amounting to more than 60 times the amount that Trump's campaign received.

According to Open Secrets, employees at Alphabet, Apple, Amazon, Comcast, Facebook and Microsoft collectively donated more than $3.5 million to Hillary.

Meanwhile, Trump only collected around $50,000 from the tech industry.

Trump told the Daily Caller in September that big tech firms intervened in the 2018 midterms by supporting Democrats, as well as his presidential election with Facebook and Google backing Hillary - citing an unfair bias.

He said: 'If you look at all, virtually all of those companies are super liberal companies in favor of Hillary Clinton.

'Maybe I did a better job because I'm good with the Twitter and I'm good at social media, but the truth is they were all on Hillary Clinton's side, and if you look at what was going on with Facebook and with Google and all of it, they were very much on her side.'

During Hillary's speech, Kawasaki says he began to broadcast a Facebook Live, noting that tens of thousands of people often watch his live videos, but he was stopped and told recording wasn't permitted. Pictured: A photo of Hillary taken by Kawasaki at the fundraiser

Employees at Alphabet, Apple, Amazon, Comcast, Facebook and Microsoft collectively donated more than $3.5 million to Hillary's campaign. Trump only collected around $50,000 from the tech industry. Pictured: Graph of donation amounts from big tech companies

Kawasaki writes in his book that he took his family to attend Hillary's fundraiser in Los Altos on November 4, 2015, posting several pictures of the event on his Instagram page.

During her speech, he says he began to broadcast a Facebook Live, noting that tens of thousands of people often watch his live videos.

However, he was stopped by one of her team members who told him recording wasn't permitted. Kawasaki points out that this was a mistake.

The second missed opportunity Kawasaki notes was the meet and greet where attendees could have their photo taken with Hillary.

But he writes that 'no one was permitted to take selfies or hand his camera to someone on her staff to take photos.'

He writes: 'I knew one of her volunteers, so I was able to obtain a copy of the photo taken by the staff photographer to use on my social media. I don't know if most people got a copy, because no one was recording who was in the photos.

'At the time I figured that this procedure was in the interest of speed. But each group could have handed one phone to a staffer to take a photo at the same time as the staff photographer.'

'Instead of permitting only a staff photo that people never received, members of the audience that night could have handed their phone to one of the many millennial staffers who were standing around.

'I assume this procedure as repeated at other appearances, so the lost exposure was easily in the tens of millions.'

Kawasaki scathingly writes: 'If someone with over 10 million followers offers to help you, you should probably accept the help'

Still, Kawasaki says the biggest mistake was turning down offers of help from industry leaders.

He writes that in 2018 he 'met with executives at Microsoft and Facebook. We talked about how their companies interacted with the presidential campaigns.

'Both executives told me that they and their company colleagues were Clinton supporters and had wanted to help above and beyond their job responsibilities.

'Both told me the Clinton campaign turned down their offers to help. By contrast, the Trump campaign accepted all the help that was offered by these companies.'

Guy Kawasaki's book Wise Guy will be released in February

Kawasaki points out that while Hillary snubbed efforts to help her campaign, Trump's team latched onto every opportunity given, as he speculates that the assistance could have played a role into who won.

He scathingly writes: 'Eat when served.

'Was it arrogance, shortsightedness, or understandable prioritization that made her campaign turn down the offers of assistance?

'We'll never know, but I learned several things from this debacle: If someone with over 10 million followers offers to help you, you should probably accept the help.

'If Microsoft and Facebook offer to help, you should accept their help.

'If there's anything worse than not getting help when you need it, it's not accepting help when it's offered. '

Kawasaki attended Stanford University, graduating early in 1976 with a degree in psychology before attending the MBA program at UCLA.

In his career he's worked for Apple twice, where he met of his wife of more than 30 years, Beth, and has written 13 books.

The avid surfer started several software companies, was the CEO of the Motorola division of Google, became the 'chief evangelist' of the Sydney-based company Canvas, is on the board of trustees of the Wikimedia Foundation and is a Mercedes Benz brand ambassador.

Guy Kawasaki's book Wise Guy will be released in February.