CuriousCat.me has been discontinued. Similar sites and apps include Tellonym, which is free. Other options are NGL: Anonymous Q&A, ONVO - Limitless Discoveries, Whispa and Askmos.me. You can choose from more than 10 Q&A Services like CuriousCat.me for iPhone, Android, iPad, self-hosting and Mac.
Revospring is a free, open-source social network following the Q/A (question and answer) principle of sites like Formspring, ask.fm or CuriousCat. Users can create accounts on Revospring to receive questions from other users of the site and/or anonymous people on the Internet.
askbox is a free "Ask Me Anything" platform that gives creators of any kind a single, permanent link (askbox.buzz/ask/yourname) where their audience can send them questions - anonymously or with their name attached.
SecretGate is an open-source, privacy-focused ephemeral messaging platform designed to eliminate server-side trust and raw data exposure.
Free browser-based Q&A service where users receive questions in a private inbox, allow or block anonymous submissions, and publish replies on customizable public profiles. It supports following, likes, search, friends feeds, and recent-answer streams.
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