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TheirSide
Chat with one AI character—or bring four into one room
TheirSide is a browser-based space for private conversations with fictional AI characters. Start 1:1, create a custom character, or bring up to four AI characters into one room, where later replies can use the shared conversation as context. Story scenes add a common setup for role-driven exchanges. No install is required, and a signed-out Mio + Kai demo plus a Free plan make it easy to try. Built for fictional entertainment and creative exploration—not multi-human chat or therapy.
Hi Product Hunt 👋
We built TheirSide around a simple idea: a character conversation may start 1:1, but creative scenes often need more voices. We wanted one private place where a user could begin with a single fictional AI character, expand into a group room, and continue with a shared story setup.
The hard part was not just adding more characters—it was making multi-character turns feel coherent. We moved away from fixed speaker slots toward flow-based turn selection, then repeatedly tested our Mio + Kai guest room and published both the observed results and the limits.
Today TheirSide runs in the browser, includes a no-sign-in demo, supports custom fictional characters and group rooms with up to four AI characters, and has a Free plan.
We’d love feedback:
• Does moving from 1:1 chat to a group room feel natural?
• Do characters react clearly enough to the shared conversation?
• What kind of story setup would you try first?
Thanks for checking it out.
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About TheirSide on Product Hunt
“Chat with one AI character—or bring four into one room”
TheirSide was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #110 on the daily leaderboard. TheirSide is a browser-based space for private conversations with fictional AI characters. Start 1:1, create a custom character, or bring up to four AI characters into one room, where later replies can use the shared conversation as context. Story scenes add a common setup for role-driven exchanges. No install is required, and a signed-out Mio + Kai demo plus a Free plan make it easy to try. Built for fictional entertainment and creative exploration—not multi-human chat or therapy.
TheirSide was featured in RPGs (2.7k followers), Artificial Intelligence (475.9k followers) and Bots (110.8k followers) on Product Hunt. Together, these topics include over 117.6k products, making this a competitive space to launch in.
Who hunted TheirSide?
TheirSide was hunted by openStar. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how TheirSide stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
openStar