A tech company whose boss was filmed hugging a colleague at a Coldplay concert has said a purported statement from him expressing remorse is fake.

"Our leaders are expected to set the standard in both conduct and accountability, and recently, that standard was not met," the company said in a statement.

Andy Byron, the chief executive of New York-based tech company Astronomer, has resigned from his role after he was spotted embracing an employee at a Coldplay concert, according to a LinkedIn post from the company on Saturday.