Durov was detained on Saturday at Le Bourget airport outside Paris as part of a judicial inquiry opened last month involving 12 alleged criminal violations.
Now that France has charged Telegram's founder with failing to stop illegal activity on his platform, other tech bosses may have reason to weigh the wisdom of jetting into Europe themselves.
Judges in France have placed Pavel Durov, the billionaire founder and chief executive of the Telegram messaging app, under formal investigation over the platform's alleged misuse by organized crime gangs.
A French court granted Durov bail under specific conditions, including a payment of €5 million (roughly Rs 46.42 lakh), bi-weekly reports to the police, and a restriction preventing him from leaving France, according to Reuters.