Protonmail, notable for featuring "privacy" in its marketing and being a being a "private" email service commonly recommended outside the republic, is facing serious allegations of cooperating with criminal organizations styling themselves as "law enforcement" in various fiat jurisdictions (archived). A spokesperson has tried to mitigate the criticism by suggesting the don't "voluntarily" cooperate and are "obliged" to cooperate with criminal demands.
Such derpy weaseling ignores the example of Ladar Levison, who when faced with criminal FBI demands supported by the local courts circus against his Lavabit email service did the right thing. Rather than break the contract he was marketing to customers, Levison shuttered Lavabit when the forces of evil made continuing under the conditions he marketed to customers impossible.