I trust Telegram. I feel like Facebook Messenger  WhatsApp & Snapchat all have ulterior motives. Monetary motivations to monitor your messages to tailor an advertising solution to target you specifically. The ads don't bug me much. What bothers me is that if a corporation asked or if the government asked  they would hand over your chat life without a pause. I feel like Telegram would stand firm. They are self funded. Not controlled by investors. They are also encrypted.
March 11 2017