Pro-ISIS Outlet Warns: Telegram Does Not Protect User Privacy, Is Not Truly Open-Source

On June 12, 2023, a pro-Islamic State (ISIS) media outlet published a post on the ISIS-run Rocket.Chat server arguing that Telegram is not truly open-source, because only its client-side code is open-source, not its server-side code. Therefore, the post claimed, the platform does not fully protect the privacy of its users. The post linked to the group's Telegram channel.