For everyone saying Telegram/Durov will just get leaned on by Russia:
1. Durov got ousted out of his own company (VK, basically Facebook in Russia) by Putin. He then decided to live in exile in Germany
2. Telegram is incorporated in Germany (which has some of the toughest privacy laws in the world), not Russia
3. Their keys are segmented and hosted in different jurisdictions, that are picked to be likely antithetical to each other. This means an adversary has to go through multiple legal systems, and power blocs (China, EU, N. America) can’t just use their regional sway to force key collection.
If there is one thing you can dislike Telegram for, its that they rolled MTProto instead of something more default. But in terms of personel, legal and UI/UX, they’re golden.