Tact is a simple native chat app for iOS, iPadOS and macOS. It works with iCloud and does not require you to create an account — this means it is private and free of unwanted connections.
Interesting Chat lets you have 1-on-1 audio conversations with random strangers based on topics you're both interested in. Search through millions of interests and select them to start a conversation.
Duckchat is a web app where people can come and talk to each other anonymously. It provides feautures like video chat, message chat and even media files sharing.