# The best second brain apps in 2026 (for teams and solo) > Ten second brain apps compared on what you own, what is open source, and what lets a team edit the same notes live. Updated for Reflect Open and Logseq 2.0. Source: https://baalda.com/blog/best-second-brain-apps-2026 Site: Baalda, https://baalda.com Published: 2026-08-24 Updated: 2026-10-12 **Short answer.** For one person, Obsidian and Reflect Open lead on owned local markdown, Logseq if you want it free and open, Notion for an all-in-one cloud workspace. For a team that needs several people editing the same owned markdown at once, with permissions and AI over MCP, Baalda is the strongest fit. There are more "best second brain app" lists than there are second brain apps, and most of them were written before the two changes that actually matter this year. In July 2026 Reflect released Reflect Open under an MIT license, rebuilt on plain markdown files in a folder you choose. The day before, Logseq shipped its 2.0 database version with real-time collaboration in alpha. Owning your files used to be the thing that separated the serious tools from the rented ones. It is now close to table stakes. So the question that decides this for you in 2026 is a different one: **does one person think in these notes, or does a team?** Almost every app below is built for one person. A few are built for several. Very few are built for several people editing the same owned markdown at the same time, which is the part that is still hard. ## What changed in second brain apps in 2026 Four things moved, and they reshuffle most of the lists published last year. - **Reflect went open source and local.** [Reflect Open](https://reflect.app/blog/reflect-open) landed on 14 July 2026: MIT licensed, notes as plain markdown in a folder you pick, a local SQLite index beside them, and AI that runs on your own OpenAI, Anthropic, Google or OpenRouter key. The Mac app is free. The older hosted Reflect still runs for existing subscribers. - **Logseq shipped its database version.** Logseq 2.0.1 arrived on 13 July 2026. The canonical store is now a database, and it brought RTC, a real-time collaboration layer for syncing between devices or working with other people. The DB version is beta and RTC is alpha, with the project itself recommending backups. - **Tana moved toward meetings.** Tana's pricing and homepage now sell an agentic meeting platform first, with hosted meetings, transcripts and a meeting agent for Zoom, Teams and Google Meet. The outliner continues, but it is no longer what the product leads with. - **Obsidian made shared vaults official, without live editing.** Obsidian Sync supports a shared vault with up to 20 collaborators. Its own documentation is direct about the limit: "Obsidian does not yet support collaborative live editing on the same file", and "you will not see the other user's cursor". That last one is the dividing line this whole category still sits on, and it is worth [reading in full if you are an Obsidian team](/blog/obsidian-multiplayer-realtime-collaboration). ## The ten apps, side by side | App | Best for | Notes as files you own | Open source | Live co-editing | Starts at | | --- | --- | --- | --- | --- | --- | | **Baalda** | A team second brain | Yes · markdown on disk | Yes · Apache-2.0 | Yes · CRDT | Free for 2 · $10 / seat / mo | | Obsidian | Solo local power users | Yes · markdown | No | No · synced, not live | Free · Sync $4 / mo | | Notion | All-in-one team workspace | No · server-side | No | Yes | Free · Plus $10 / mo per seat | | Anytype | Encrypted personal spaces | Yes · own object format | Source-available · any-sync is MIT | Yes · shared spaces | Free · paid tiers for storage | | AFFiNE | Docs plus whiteboard | Yes · local-first | Yes · mostly MIT | Yes | Free · Pro $6.75 / mo | | Logseq | Open-source outlining | Yes · local DB graph | Yes · AGPL | Alpha · RTC | Free | | Reflect Open | Fast personal markdown notes | Yes · markdown | Yes · MIT | No | Free on Mac | | Tana | Meetings and agents | No · cloud | No | Yes | Free · Pro $20 / mo | | Capacities | Object-based personal notes | No · cloud sync | No | No · view-only sharing | Free · Pro $9.99 / mo | | Heptabase | Visual research on a whiteboard | No · cloud | No | Collaborator invites | Pro $8.99 / mo | Prices are the list prices on each vendor's own pricing page at the start of October 2026, in US dollars. Several are cheaper paid annually. ## 1. Baalda, best for a team second brain Baalda is the pick when the brain belongs to a team rather than a person. Every note is a plain markdown file on your disk, and a CRDT lets several people edit the same note at once without conflict copies. Per-file permissions keep a shared vault sane, and an AI assistant reads and writes those same files over MCP instead of a chat window copy. It is open source under Apache-2.0, free to run locally or self-host, and the managed backend is free for 2 people and 1 synced vault. Past that, the Team plan is [$10 per seat a month, or $110 per seat a year](/pricing), with a minimum of 3 seats and one account covering every vault. **Choose it if:** more than one person needs to work in the same notes, and you want Obsidian's ownership with Notion's collaboration. **Skip it if:** you work alone and want the largest plugin ecosystem available today. ## 2. Obsidian, best solo local vault Obsidian is still the standard for a personal, local markdown brain: plain files, a deep plugin ecosystem, and years of maturity behind it. Personal use is free, Sync is $4 a month billed annually, and a shared vault now holds up to 20 people. What it does not do is live editing. Collaborators see each other's changes after a sync, never as they type, and simultaneous edits to one file are resolved by a merge rather than by a shared cursor. **Choose it if:** you are one person who wants maximum control and customization. **Skip it if:** two people need to be in the same note at the same time. The full trade-off is in [Baalda vs Obsidian](/compare/obsidian). ## 3. Notion, best all-in-one workspace Notion remains the most polished all-in-one: docs, wikis, databases and tasks with real-time collaboration that nobody has to think about. The free plan covers an individual. As of 12 October 2026, Plus is $10 per seat a month billed annually, and Business at $20 per seat adds the agent and AI meeting notes. The trade is ownership. Your content lives server-side in a proprietary format, exports are a conversion rather than a copy, and there is no self-hosting. **Choose it if:** you want databases and an all-in-one cloud workspace, and renting the storage is an acceptable price. **Skip it if:** you need local-first markdown, or you have to be able to take the whole thing with you intact. ## 4. Anytype, best encrypted personal spaces Anytype keeps data on your device first and syncs peer-to-peer over any-sync, its CRDT protocol, which is MIT licensed even though the apps themselves ship under a source-available license. Spaces can be shared, each with their own access rights, and there is now a business edition with SSO and central administration. The catch for a markdown team is the format: notes are objects in Anytype's own encrypted store, not .md files sitting in a folder your other tools can read. **Choose it if:** encryption and peer-to-peer sync matter more to you than plain files. **Skip it if:** you want your notes readable by git, by ripgrep and by an agent without an export step. [Baalda vs Anytype](/compare/anytype) goes through it properly. ## 5. AFFiNE, best open-source docs plus whiteboard AFFiNE puts documents, databases and an infinite canvas in one app, local-first and with CRDT collaboration, and most of the code is MIT with a source-available server. You can self-host it on Postgres and Redis, or take the free cloud plan, Pro at $6.75 a month, or Team at $10 per seat. It is the closest thing on this list to an open Notion plus Miro. **Choose it if:** your thinking is half documents and half whiteboard, and you want to host it yourself. **Skip it if:** you want the notes themselves to be markdown files on disk rather than blocks in the app's own store. ## 6. Logseq, best open-source outliner Logseq is free, AGPL licensed and local, with an outliner model and block references that people who like it tend to love. Version 2.0 moved the canonical store into a database and added RTC for syncing across devices and collaborating with others, which is real progress on the thing it was always missing. Treat the state of it honestly: the DB version is beta, RTC is alpha, and the project advises keeping backups. **Choose it if:** you want a free, open, outliner-first personal graph and you do not mind beta software. **Skip it if:** a team is about to depend on it this quarter. [Baalda vs Logseq](/compare/logseq) covers where the two differ once collaboration is the requirement. ## 7. Reflect Open, best fast personal markdown notes The Reflect worth comparing in 2026 is the new one. Reflect Open is MIT licensed, stores notes as markdown in a folder you choose, and keeps a rebuildable SQLite index beside them. There is no Reflect account and no hosted notes database, and AI runs on an API key you supply, with notes marked private excluded from it. The Mac app is free. Windows and Android do not exist yet, and the iPhone app is in TestFlight, so this is a Mac-first choice for now. **Choose it if:** you want a fast daily-notes app on a Mac, on files you own, with your own AI key. **Skip it if:** you are on Windows, or you need several people in one set of notes. ## 8. Tana, best for meetings and agents Tana built its following on supertags and a queryable outline. In 2026 the product leads with meetings: hosted meetings with AI transcripts, a meeting agent for the main conferencing tools, calendar connections, and MCP support on the $20 a month Pro plan. The outliner is still there and still powerful. It is just no longer being sold as a general second brain. **Choose it if:** your bottleneck is meetings, and you want structure and agents around them. **Skip it if:** you want an owned, open, markdown base that is not going anywhere. ## 9. Capacities, best object-based personal notes Capacities organizes notes as typed objects rather than files: people, books, meetings, ideas, each with their own structure. The free plan gives unlimited objects with a 5 GB media cap, and Pro is $9.99 a month. It is also explicit about staying personal. The company states that it is designed for individuals and does not offer organization accounts, and sharing is view-only. **Choose it if:** you are one person who thinks in structured object types. **Skip it if:** you are evaluating this for a team at all. ## 10. Heptabase, best visual research tool Heptabase is for working through something hard: PDFs, highlights and notes laid out on whiteboards you can see all at once. Pro is $8.99 a month, Premium $17.99 with more AI credits and a choice of model, and collaborator invites are included. It is cloud-based and closed, and it is a research tool before it is a knowledge base, which is the reason to pick it or to pass. **Choose it if:** you are reading hard material and need to see the argument spatially. **Skip it if:** you want a durable, owned archive the whole team writes into. ## Which one fits your situation - **One person, local files, maximum control:** Obsidian. Reflect Open if you are on a Mac and want it lighter. - **One person, free and open source:** Logseq, with backups, or Reflect Open. - **One person who thinks in objects or on a canvas:** Capacities for typed objects, Heptabase for visual research. - **A team that wants an all-in-one cloud workspace:** Notion. It is still the easiest sell internally. - **A team that wants documents and whiteboards, self-hosted:** AFFiNE. - **A team that wants a shared brain on markdown it owns, edited live, with AI working in the same files:** Baalda. That is the gap this product exists to fill, and [what a team second brain actually means](/blog/team-second-brain) spells out the requirements it has to meet. ## What to test before you commit Picking from a table is how teams end up migrating twice. Four tests take an afternoon and settle it. 1. **Open two machines on one note.** Type in both at once. Watch what the app does: a live cursor, a silent merge, or a conflict copy. This is the single test most of these apps fail. 2. **Export everything, then open the export somewhere else.** Markdown files should be readable as-is. If the export is a zip of HTML or a JSON blob, you are renting. 3. **Point an agent at it.** Can an assistant read and write the real notes, or only what you paste into a chat? 4. **Add a person and remove a person.** Check what permissions exist at the file and folder level, and what happens to shared notes when somebody leaves. ## How this list was put together Every price and license here comes from the vendor's own pricing page, documentation or release announcement, checked in the first week of October 2026, not from last year's roundups. Where a feature is in beta or alpha it is labeled, because shipping a team onto alpha sync is a decision you want to make deliberately. Baalda is our product, and it is listed first because this list is organized around collaboration on owned files, which is what Baalda is built for. On any other axis, something else on this page wins, and those cases are named above rather than buried. If you are solo, three of these are free and two of them are open source, and you should take one of those instead. ## FAQ ### What is the best free second brain app? Logseq is free and open source, Obsidian is free for personal use, and Reflect Open is free on Mac under an MIT license. Baalda is free to run locally or self-host, with a paid plan only for the managed sync backend. ### Which second brain apps are open source? Logseq (AGPL), AFFiNE (mostly MIT with a source-available server), Reflect Open (MIT) and Baalda (Apache-2.0) are open source. Anytype is source-available, with its any-sync protocol under MIT. Obsidian, Notion, Tana, Capacities and Heptabase are closed. ### Can a team use Obsidian as a shared second brain? Partly. Obsidian Sync shares a vault with up to 20 people, but its documentation states that Obsidian does not yet support collaborative live editing of the same file, and you do not see another person's cursor. Edits appear after a sync and simultaneous changes are merged. ### Did Reflect change in 2026? Yes. Reflect Open shipped on 14 July 2026 under an MIT license, storing notes as plain markdown in a folder you choose, with AI running on your own provider key and no Reflect account. The older hosted Reflect still runs for existing subscribers. ### What is the difference between a note-taking app and a second brain? A note-taking app captures individual notes. A second brain links them into a connected, searchable system you think with over time. A team second brain adds shared ownership, permissions and real-time collaboration on top.