'So un-American it pains us all' - How tech titans are responding to Trump's immigration ban

'Like many of you, I'm concerned about the impact of the recent executive orders signed by President Trump,' Zuckerberg said in a Facebook post on Friday.

He said he remained optimistic about Trump's vague commitment to protecting 'Dreamer' immigrants who were brought into the US at a young age from deportation.

You can read Zuckerberg's full post here.

'We stand firmly against these actions, and will not be silent on issues that threaten the values of our community,' Lyft cofounders John Zimmer and Logan Green said in a letter to customers.

'We know this directly impacts many of our community members, their families, and friends. We stand with you, and are donating $1,000,000 over the next four years to the ACLU to defend our constitution. We ask that you continue to be there for each other - and together, continue proving the power of community.'

In a series of tweets on Saturday, Chesky said Airbnb would provide 'free housing to refugees and anyone not allowed in the US.'

'Not allowing countries or refugees into America is not right, and we must stand with those who are affected,' he continued. 'Open doors brings all of US together. Closing doors further divides US. Let's all find ways to connect people, not separate them.'

In a more pointed memo to employees, Chesky said that Trump's order is 'a policy I profoundly disagree with and it is a direct obstacle to our mission at Airbnb.'

Musk, who sits on Trump's economic advisory team, sent out a diplomatically worded statement saying that Trump's immigration order 'is not the best way to address the country's challenges,' adding that it was affecting those who have done nothing wrong and 'don't deserve to be rejected.'

In a tweet from the company's official account, a Twitter spokesperson added, 'Twitter is built by immigrants of all religions. We stand for and with them, always.'

Dorsey, who is also the CEO of payments company Square, tweeted a statistic that '11% of Syrian immigrants to the US are business owners, more than triple that of US-born business owners.'

Twitter has said in the past that it would ban Trump's account on the service if he violated its hate speech policies, and protesters recently challenged the company to enact a ban because of Trump's comments on immigrants.

'This administration has already shown that they are not particularly impressed by the first amendment, and that they are interested in other anti-immigrant action,' he wrote in a blog post. 'So we must object, or our inaction will send a message that the administration can continue to take away our rights.'

'From the very beginning, Amazon has been committed to equal rights, tolerance and diversity -- and we always will be,' Amazon VP of HR Beth Galatti wrote in the memo, a copy of which was obtained by Business Insider. 'As we've grown the company, we've worked hard to attract talented people from all over the world, and we believe this is one of the things that makes Amazon great -- a diverse workforce helps us build better products for customers.'

'Executive orders affecting world's most vulnerable are un-American,' he wrote in a tweet. 'Dropbox embraces people from all countries and faiths.'

Sacca personally matched donations on Twitter up to $75,000, then doubled his match and gave $150,000. Nest founder and former Apple executive Tony Fadell also committed to matching donations up to $100,000.

'When we close our hearts & stop loving other people as ourselves (MK 12:31) we forget who we truly are---a light unto the nations,' he tweeted.

'Trump's stated immigration policies would be economically damaging and will in time be seen as morally wrong,' wrote Collison. Stripe allows business to accept payments from anywhere in the world.

'Peter doesn't support a religious test, and the administration has not imposed one,' a spokesperson for Thiel told Forbes on Saturday.

Thiel immigrated to the US from Germany in the 1970s and has already facilitated meetings between Trump and top leaders in the tech industry.