Rabbithole

Every answer is a junction. You can ask a follow-up on the same thread, and the app keeps the whole path visible so you can see how you got from your first question to your latest one. This is the feature that sets Rabbithole apart from a plain chatbot, where each new question usually wipes the slate. Here the branches stay, and going off on a tangent is the point rather than a mistake.

On both tiers, follow-up questions are unlimited. The daily cap applies to new searches, not to how far you can push one line of inquiry. In practice that means the free plan goes further than the number suggests, because most real exploration happens in the follow-ups rather than in the first query.

Rabbithole saves your conversations and gives you a history tab to browse them. You can reopen any thread and continue exactly where you stopped, which turns the app into a personal knowledge trail rather than a string of throwaway searches. The sign-in page makes the promise directly: keep a history of your conversations, revisit and continue your discussions at any time.

Answers come with sources. The app searches the live web and cites what it found, so you can check a claim instead of taking the summary on faith. That matters if you're using it for schoolwork or early research, where knowing where an answer came from is half the value.

The free plan runs on Google's Gemini 1.5 Flash. It's a fast, lighter model, which suits short exploratory questions well and keeps the free tier responsive. The trade-off is that a small model can miss nuance on technical or specialized topics, and it's not the model most people would pick for dense research work.

Pro unlocks more capable models, with Perplexity Sonar listed as coming soon. The company also flags a future feature to chat across all your rabbitholes at once, so you could talk to your whole history instead of one thread. Both are marked as not yet available, which means they're part of where the product is heading rather than what you get today.