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TreeHole
Private AI journal that becomes your digital avatar.
Finally feel heard. You just talk about your day, and TreeHole quietly turns it into a life journal — so the next time you talk, the version of you that already made it through comes back to sit with you now. Over time those diaries become something more: a digital avatar you can leave for the people you love — your children, say — so that one day, in your own voice, you can still be there for the nights you can't. Everything encrypted at rest with AES-256-GCM.
I'm Yunfei. I built TreeHole because I've lived with depression for nearly 20 years.
Medication and therapy helped with the symptoms, but the thing that actually reached me was never advice from outside — it was rereading my own old reflections. Hearing my past self, the one who'd already survived the same dark nights, speak to my present self felt more real than anything anyone else could tell me.
The problem is that almost no one (me included) can keep up a journaling habit. So TreeHole flips it around: you just talk about your day and how it felt — like messaging a friend. The AI quietly turns that into a thoughtful entry in a private life journal, and the next time you talk, it brings back the relevant past entries, so the version of you that already made it through can sit with you again.
On privacy: your entries are encrypted at rest (AES-256-GCM), isolated per account, and you never have to give your real name. I'll be straight about the limit, too — to write your journal the app has to decrypt your text server-side, so technically I could read it. I say so plainly in the ToS, and taking even myself out of that trust boundary (TEE) is on the roadmap. For a privacy product I'd rather tell you exactly what it is than overclaim.
This is my honest attempt to build the tool I wish I'd had years ago. I'd love your thoughts, your feedback, or your own experiences — especially if you've struggled with something similar.
One more thing — the part of TreeHole I've wanted to build for the longest time: the Digital Avatar.
After you've journaled for a while, those entries become a surprisingly honest record of who you are — how you think, what you love, how you got through your hardest nights. The avatar is built on that. When someone you've chosen talks to it, it answers in the first person, in your voice, grounded in what you actually wrote (through the same private, encrypted RAG that powers your own chats). If your diaries don't hold something, it says it doesn't quite remember, instead of making it up.
I built it thinking about my kids. There will be nights, years from now, when they're facing something heavy and I won't be there — and this is a way for them to still hear me say: "I know how this feels, because I felt it too. Here's how I got through."
A few things that mattered to me:
It's off by default. You decide exactly who can reach it — and you can change that list or switch it off anytime.
Your diaries stay encrypted at rest and isolated per account; the avatar only ever draws from what you actually wrote.
I try to be honest about what it is: not a replacement for you, more like a letter that can answer back.
I'd genuinely love your take — is this something you'd turn on? Who would you leave a voice for, and what would it take to trust it enough to do so?
About TreeHole on Product Hunt
“Private AI journal that becomes your digital avatar.”
TreeHole was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #110 on the daily leaderboard. Finally feel heard. You just talk about your day, and TreeHole quietly turns it into a life journal — so the next time you talk, the version of you that already made it through comes back to sit with you now. Over time those diaries become something more: a digital avatar you can leave for the people you love — your children, say — so that one day, in your own voice, you can still be there for the nights you can't. Everything encrypted at rest with AES-256-GCM.
TreeHole was featured in Android (57.4k followers), Writing (59.3k followers), Artificial Intelligence (474.1k followers) and Health (6.7k followers) on Product Hunt. Together, these topics include over 169.9k products, making this a competitive space to launch in.
Who hunted TreeHole?
TreeHole was hunted by Yunfei Duan. 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.
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Yunfei Duan
Hi everyone 👋
I'm Yunfei. I built TreeHole because I've lived with depression for nearly 20 years.
Medication and therapy helped with the symptoms, but the thing that actually reached me was never advice from outside — it was rereading my own old reflections. Hearing my past self, the one who'd already survived the same dark nights, speak to my present self felt more real than anything anyone else could tell me.
The problem is that almost no one (me included) can keep up a journaling habit. So TreeHole flips it around: you just talk about your day and how it felt — like messaging a friend. The AI quietly turns that into a thoughtful entry in a private life journal, and the next time you talk, it brings back the relevant past entries, so the version of you that already made it through can sit with you again.
On privacy: your entries are encrypted at rest (AES-256-GCM), isolated per account, and you never have to give your real name. I'll be straight about the limit, too — to write your journal the app has to decrypt your text server-side, so technically I could read it. I say so plainly in the ToS, and taking even myself out of that trust boundary (TEE) is on the roadmap. For a privacy product I'd rather tell you exactly what it is than overclaim.
This is my honest attempt to build the tool I wish I'd had years ago. I'd love your thoughts, your feedback, or your own experiences — especially if you've struggled with something similar.
Thank you for checking it out ❤️