Tana.

Tana is an outliner - you write in bullet points, the way you already do in a meeting when nobody is watching. The trick is what happens when you tag a bullet. Type #project or #person and that humble line of text stops being text. It quietly grows fields: a status, an owner, a due date, whatever you decided a "project" should have. This is the feature everyone talks about, and it is called a Supertag. It is the reason people describe Tana the way they describe a religious conversion.

The consequence is that your notes are also a database, without you ever building a database. Ask Tana to show every #project that is "blocked," or every #person you met this quarter, and it just does it, because it has been quietly structuring your scribbles the whole time. Roam Research gave power users a graph of linked ideas. Notion gave them databases. Tana's argument is that you want both, in the same place, and you want an AI that can read the result.

That last part is not decoration. The reason structured notes matter more in 2025 than they did in 2015 is that there is now something on the other end that can use them. An AI is only as good as the context you hand it, and unstructured notes are terrible context. Tana built the structure first so the AI would have something real to read - which is a more disciplined bet than bolting a chatbot onto an old note app and hoping.

So you can point Tana's AI at a messy page of meeting notes and ask it to pull out the decisions, draft the follow-up email, and populate the project fields - and because the notes are structured, it mostly works. You can define your own multi-step AI commands. As of 2026 you can even pick which model runs each one: GPT, Claude, or Gemini, each fed the surrounding graph as context. The model is becoming the commodity. The graph is the moat.

Here is the detail that should make any founder jealous. Before Tana let most people in, more than 160,000 of them had already joined a waitlist. Not for a discount. Not for a launch-day mug. For access to an invite-only beta of a note-taking app - a category that, on paper, is as crowded as software categories get.

The waitlist reportedly included employees from over 80% of the Fortune 500. That is the kind of top-down-meets-bottom-up demand that enterprise sales teams spend years and millions trying to manufacture. Tana got it by being the thing that productivity-obsessed people could not stop talking about on YouTube and in Slack.

Speaking of Slack: the community calls itself "Tanarians," and there are more than 24,000 of them. They write tutorials, build templates, and answer each other's questions faster than most companies' support desks. In practice the community is the onboarding, the help center, and an unpaid R&D lab that surfaces use cases the team never imagined.

There is a catch, and Tana is unusually honest about it. The learning curve is steep. The Supertag model takes days to internalize, and plenty of people quit in the first week because it is not point-and-shoot like Apple Notes. The people who climb the curve tend not to come back down. Whether a two-week onboarding is a bug or a moat is one of the more interesting open questions about the company.

Tana was founded in 2021 by Tarjei Munthe Vassbotn (CEO), Olav Sindre Kriken (COO), and Grim Iversen. Two of them come out of Google, and one worked on Google Wave - the wildly ambitious collaboration tool Google launched in 2009 and shut down in 2010 for being, roughly, too much too soon. There is something poetic about a Wave veteran building the collaborative, AI-powered workspace fifteen years later, when the timing might finally be right.

The company is headquartered in Palo Alto with an engineering hub in Oslo - a Silicon Valley front door and a Norwegian workshop. In February 2025 it emerged from stealth with a $14M Series A led by Tola Capital, bringing total funding to about $25M at a reported ~$100M valuation. The round pulled in a striking angel list: Dropbox co-founder Arash Ferdowsi, Datadog founder Olivier Pomel, Google Maps co-founder Lars Rasmussen, Virgin's Holly Branson, and productivity educator Ali Abdaal, among others.