Future Me - Send an email to your future self
Letter to Yourself - Send a physical letter to your future self
Letterflix - Send letters and snail mail online to the USA, Europe, India, or anywhere in the world. Letterflix is the easiest and secure way to send letters and snail mail anywhere in the world from the comfort of your home.
Timebomb Messenger - Send secret messages that open based on time or location 💣
Modern Memories - Letters written today. Delivered in the future.
DocuPost - Sustainably mail letters, checks & postcards online from 75¢