AI · alternatives · 2026
24 alternatives to Second Brain Pro Bundle
The ultimate AI & PDF toolkit for Obsidian on iOS.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
- 1
Merge Obsidian notes to AI in seconds. Now on Android! 🚀
Apr 2026 · play.google.com · its alternatives →
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Obsidian Canvas gives you infinite space to research, brainstorm, diagram, and lay out your ideas.
2022 · obsidian.md · its alternatives →
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Ideaverse Pro▲325Manage your whole life in Obsidian
2023 · linkingyourthinking.com · its alternatives →
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A few months ago I noticed that I was quickly approaching my 10GB sync limit for my daily driver vault. I considered deprecating some of the heavier files and images, but I was worried how it would affect the integrity of my vault. Instead, I took the opportunity to think to myself -- what would the perfect vault look like? I began to write down some of the key philosophies and strategies I use in my driver vault which led to indispensable plugins, which led to more indispensable philosophies and on and on it went. I've chronicled these results into a fully working vault template that…
2022 · github.com · its alternatives →
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A Starter Kit to Manage Your Whole Life
2023 · start.linkingyourthinking.com · its alternatives →
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Manage your whole life in Obsidian
2025 · linkingyourthinking.com · its alternatives →
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Ready-to-use Markdown knowledge base for AI agent & Obsidian
Jun 2026 · payhip.com · its alternatives →
- 8
Persistent memory for Claude, ChatGPT & Cursor. Free.
May 2026 · github.com · its alternatives →
- 9OS
https://github.com/acheong08/obsidian-sync Hello HN, I'm a recent high school graduate and can't afford $8 per month for the official sync service, so I tried my hand at replicating the server. It's still missing a few features, such as file recovery and history, but the basic sync is working. To the creators of Obsidian.md: I'm probably violating the TOS, and I'm sorry. I'll take down the repository if asked. It's not ready for production and is highly inefficient; Not competition, so I hope you'll be lenient.
2023 · its alternatives →
- 10
Reor is an open-source AI note-taking app that runs models locally. The four main things to know are: 1. Notes are connected automatically with vector search. You can do semantic search + related notes are automatically connected. 2. You can do RAG Q&A on your notes using the local LLM of your choice. 3. Embedding model, LLM, vector db and files are all run or stored locally. 4. Point it to a directory of markdown files (like an Obsidian vault) and it works seamlessly alongside Obsidian. Under the hood, Reor uses Llama.cpp (node-llama-cpp integration), Transformers.js and Lancedb to power…
2024 · github.com · its alternatives →
- 11
Hi HN, Nick here. We’re launching OpenKnowledge (https://openknowledge.ai/), a “what you see is what you get” markdown editor that has direct integrations with Claude, Codex, and other agents. Available as MacOS app or Web UI+CLI. Fully free/local and OSS. We built this because we wanted a Notion-like experience for writing and sharing markdown files across our team. Obsidian is the best alternative we tried, but found it doesn’t have a true WYSWIG UI and it didn’t integrate well with Claude/Codex outside of community plugins. So we built OpenKnowledge. It takes…
Jun 2026 · github.com · its alternatives →
- 12
Second Brain▲281Hi HN, I'm Dom, a solo founder. I built Second Brain to solve a common issue I had with AI chats: the knowledge disappears. There’s no structure, no memory, and no way to reuse or build on them. So I built a tool that combines AI chat with a visual, interconnected knowledge system. Key features: - Save AI responses into editable docs (Notion-style Pages). - AI Visual board with multiple content & chat nodes (like Miro meets ChatGPT). - Add and chat with YouTubes, TikToks, Audio, PDFs, GitHub repos, Looms, websites, etc. - Organize using Projects and Smart Tags — then chat with full contexts.…
2025 · second-brain-lac-ten.vercel.app · its alternatives →
- 13
Unlock infinite digital memory with your (AI) second brain
2024 · usefindr.com · its alternatives →
- 14
Calderafree▲195Your Obsidian vault as a living profile and linked garden
10d ago · caldera.social · its alternatives →
- 15OS
My Public Second Brain (https://brain.sspaeti.com) is built with the help of a wonderful tool called Quartz (https://brain.sspaeti.com/quartz-publish-obsidian-vault/). Obsidian (https://brain.sspaeti.com/obsidian/) has become my favorite for note-takers, given its flexible and linked structure that closely mirrors our natural way of thinking. With Quartz, I was able to seamlessly publish my Obsidian notes to a public vault, providing the groundwork for my Public Second Brain. The journey of making this possible involved some scripting as…
2023 · its alternatives →
- 16
Import your Obsidian Vault to Apple Notes
2025 · obsidiantonotes.com · its alternatives →
- 17
Contribute to memgraph/odin development by creating an account on GitHub.
2023 · github.com · its alternatives →
- 18
Here's something I realized: the most AI-native knowledge base isn't a SaaS product with an API. It's a folder of markdown files on your disk. Obsidian stores everything as plain .md files. That means Claude Code (or any AI tool) can grep, read, write, and traverse your entire knowledge base with zero setup. No API keys. No OAuth. No middleware. Just local file I/O. The only missing piece was sync. I wanted my vault on iPhone (iCloud), on Mac (local), and on GitHub (backup + version history) — without paying $4/mo for Obsidian Sync. cc-md is ~400 lines of bash. iCloud handles Apple…
Feb 2026 · github.com · its alternatives →
- 19
Give your team one AI memory. Keep your own private.
Jul 2026 · thesecondbrain.dev · its alternatives →
- 20
Quickly format your notes with ChatGPT in Obsidian - different-ai/obsidian-ava
2023 · github.com · its alternatives →
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- 22
Spotify Wrapped for Claude, Codex & a Public leaderboard.
Jun 2026 · whoburnedmore.com · its alternatives →
- 23
SECOND BRAIN 2.0▲111Get organized, get productive with Second Brain 2.0
2023 · oussamaltrx21.gumroad.com · its alternatives →
- 24
An Obsidian vault your AI agents actually run
Jun 2026 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →