MultipleChat
MultipleChat's pitch is not having to pick one AI model - you get several in parallel, with a mode that has them cross-check each other before answering. That's genuinely useful for comparing outputs, but stacking models eats through the message quota faster than a single-model chat subscription would.
Pros
- Genuine side-by-side output from multiple models in one thread
- Collaboration mode has models critique and cross-check each other
- Document, slide, and spreadsheet generation built into the same workspace
Cons
- Running several models per query burns through the daily/monthly message quota faster
- iOS app was not yet available at the time of research
- Desktop app is a separate $250 one-time purchase on top of the subscription