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Alternatives

Products that do what Domvault – self-hostable second brain with consent-based note sharing does

Hi HN, wanted to translate this into a more human-readable post - please see below and would love any and all feedback! What is it: A second brain you self-host and engine to compound itself and spark new ideas, from your own ideas. Why: ROI on your own knowledge, actually realize the value from your ideas. Down the line I'd love for this to evolve into a wider / shareable concept -- Haven't fully figured this out yet which is part of the reason I am posting. View the /constellation folder for the specs on that concept. (Self hosting engine is all in the repo as well) Looking…

  1. 1

    Persistent memory for Claude, ChatGPT & Cursor. Free.

    May 2026 · github.com

  2. 2
    Eve.112

    AI powered second brain for Notion

    2023

  3. 3SV

    Hi HN, I've been waiting to post what I've been working on for a few weeks now:) Today we're launching LayerVault, which is a version control system made for designers. The URL is http://www.layervault.com LayerVault keeps track of what you're working on without adding extra steps to your process. The app runs in your toolbar and tracks changes you make to your files. Basically — each time you create or modify a file you’re working on, LayerVault saves a copy. You can then login, flip through its versions, and download a version from a few weeks ago. It's pretty neat — and we’ve built some…

    2011

  4. 4

    P2P desktop app for building, browsing, & sharing knowledge

    Apr 2026

  5. 5DP

    Hey HN! My name's Nadav Hollander, and I'm the Founder of Dharma. Dharma is building an open-source library that makes it really easy to programatically borrow and lend cryptocurrencies using smart contracts on the Ethereum blockchain. Today we're launching our Alpha Testnet release -- a command line tool that allows you to 1. Access a line of cryptocurrency credit from the command line in under 5 minutes 2. Easily build a bot that auto-invests in loans under hyper-customizable, programmable criteria Check it out: https://github.com/dharmaprotocol/dharma-cli Why I Think…

    2017

  6. 6

    A generative AI powered second brain

    2023

  7. 7

    Your brain is for thinking ideas and not holding onto them

    2023

  8. 8

    Save your best AI prompts. Access and share them anywhere

    2025

  9. 9

    Self-hosted, AI-powered second brain for Android

    Apr 2026

  10. 10CS

    Hi HN, I'm Kevin. I built ContextVault because I kept running into the same problem with AI tools. Every project accumulated prompts, coding conventions, architectural decisions, examples, and other pieces of context that made the models significantly more useful. The problem was that this information quickly became fragmented. Some lived in ChatGPT Projects, some in Claude, some in Markdown files, some in internal documentation, and some only existed in previous conversations. Late last year, I realized several people on our team were solving the same problems independently because previous…

    Jul 2026 · contextvault.dev

  11. 11HC

    Hi guys, long time lurker, first time (non-comment) submission. I've been working on homebrewvault.com (mostly nights) for what seems like forever. I'm just about finished with the core product and am almost ready to do some promotion. I've always followed the "Show HN" submissions because they seem to produce really valuable feedback. So before I take the plunge, I'd love to hear what you guys think. I'm also going with the "if you aren't embarrassed by your first release, you aren't releasing early enough" philosophy I first learned of here. For a little more background: As a homebrewer of…

    2011

  12. 12MD

    I'm sharing my public Second Brain - a digital Zettelkasten that connects my knowledge across Data Engineering, Personal Knowledge Management, Programming, Productivity, and philosophical topics like Digital Minimalism. Built with Obsidian and published using Quartz/GoHugo, this knowledge vault contains interconnected notes that I've crafted, curated, and connected over years. I've developed a streamlined publishing workflow where I simply add #publish to any note I want to make public, then run make deploy through a custom Rust script that's 30x faster than my original Python…

    2025 · ssp.sh

  13. 13OS

    We did a "Show HN post" 6 months back of our startup and we're very excited to show everyone how far we've come as well as the lessons we've learnt so far! It's been a roller-coaster so far and we think there's lot more of the same to come! We did apply for Ycombinator funding but got turned down :( But may re-apply soon :) For those that don't know, our startup is called Scirra and we make Construct 2 which is an HTML5 game engine (http://www.scirra.com). Our engine allows anyone to make HTML5 games without knowing any programming. It's only me and my brother working on this and we're based…

    2012

  14. 14IB

    Hi HN, I have been working on a new tool that was inspired by Vannevar Bush's memex and Luhmann's Zettelkasten. Having been a long time user of different tools, I got to the point where I decided to build my own. For the longest time I have been looking for something that puts association first, works as fast as the mind, and allows you to stay in flow state. Making building a second mind, playful and rewarding. If anyone is interested, I have added the link below. At this point I am slowly letting on the first users, and hoping to gather as much feedback as possible. The explore link on the…

    2020

  15. 15PI

    Heya! We're longtime lurkers and do sometimes post, today however I want to present to you with the fruits of almost 4 years of work, hacking, designing, physically building (for the record: 2 years full time). We'd love to get some feedback from you guys and feel free to give us any hints on what we could/should change, or any opinion on whether you think that'd be something you'd use. protonet.info So here's our rough plan: We love the web and the possibilities it gives us, we also love the way the cloud allows us instant and ubiquitous access to our data and apps. Now what we don't like…

    2012

  16. 16AS

    Hi HN, I'm the creator of epress. After a lot of work, I'm excited (and a bit nervous) to finally share it with you. For years, I've been feeling like a digital tenant on the platforms I use every day. My content, my social graph, my online identity—they were all stored on someone else's servers, subject to their rules, algorithms, and business models. I could be de-platformed, my data could be sold, or an API I relied on could suddenly be put behind a paywall. I looked into existing decentralized alternatives. While many are great projects, I found they often shifted the trust from a big…

    Sep 2025 · github.com

  17. 17PB

    I am a software engineer working alone on a passion project, a website that helps you stay organized easily and efficiently. Headspace.io is a webmail, notepad, task list and calendar, all rolled into on. The basic premise is that any data in Headspace can be "tagged" and then all relevant information for a particular tag can be displayed in one screen. This is a pre-beta build and I'm hoping to get some early feedback from the wise and generous HN folks. Would you pay a small monthly fee ($5 maybe) for a service like this? http://app.headspace.io/ (This is pre-production so…

    2013

  18. 18SO

    Hey HN, My co-founders and I have been working on a project for the last month or so, and we'd like to get your input on it. We wanted to hear your thoughts on what we're doing - so check out our landing page, and let us know what you think/understand. Does it sounds like something you guys would want to use? http://www.thesharedweb.com/alpha/intro We'll tell you guys more about exactly what we're doing as the conversation evolves, but we just wanted to see what the initial reaction is, and what you understand (i.e. are we describing it in a way that makes sense). Really excited to hear your…

    2010 · thesharedweb.com

  19. 19IM

    Hey Hacker News, I'm the maker of Kopage, a free & self-hosted Website Builder. While working on new, cool features (AI, of course), it would be great to hear some HN feedback :) Thanks, Simon

    2024 · kopage.com

  20. 20HO

    Hi HN! Ben here from hyprsqrl, and I just open-sourced something we’ve been quietly running in production: *hyprsqrl is a self-hostable bank. Think Revolut (if you know it), but every line of code is MIT/AGPL, you can run it on your own box, and the crypto bits stay hidden under the hood. --- ### Why we built it Moving money between USD and EUR still means wire fees, surprise freezes, and “call your bank” hoops. Fintechs like Revolut help—until their pricing changes or a regulator knocks. hyprsqrl aims for the resilience of self-hosting *without* forcing users to study crypto. Two…

    2025 · github.com

  21. 21

    Your local AI knowledge base

    Apr 2026

  22. 22

    Your prompt library across ChatGPT, Claude & Gemini

    Jul 2026

  23. 23

    Leave more than memories, your journal creates your Avatar

    9d ago · apps.apple.com

  24. 24

    The setup that pays for itself in one client.

    Aug 2026 · rahulverse3258.gumroad.com

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