Every part of the reasoning workflow is free. Plus is for reasoning that lasts: a record of every verdict and why it changed, a comparison against the map you had before, and a view of what each conclusion is standing on. Unlimited maps come with it.
Free
$0forever
No card required
Everything you need to lay out a hard question and see what survives.
Plus
$40 / year
That's $3.33 a month, billed yearly
For reasoning that goes on for weeks, not an afternoon.
Checkout is manual during early access: this opens a short message to us, and we activate Plus within one working day. Cancel any time; your maps stay yours either way.
Every Plus tool is open in the sandbox, no account needed.
Free is the whole reasoning workflow. Plus is for when it matters what changed and why: a record of your verdicts, a comparison against earlier versions of a map, and a view of what every conclusion depends on.
Every time you change a hypothesis from in research to confirmed or falsified, Arguma records it, along with the reason you wrote at the time. Each hypothesis carries a timeline of its verdicts, so you can see not only what you believe, but how you got there. When you share a chain, readers see that timeline too.
Free accounts still get their changes recorded. Plus shows the record.
One click ranks every hypothesis in a map by how many conclusions rest on it, and lists your conclusions weakest first: the ones standing on a falsified hypothesis, the ones standing on an untested one, and the ones nothing supports at all. It follows the links all the way down, so a conclusion three steps away from a broken assumption still shows up.
The count measures influence, not doubt: a hypothesis with many conclusions on it is the one worth checking first, not the one most likely to be wrong.
Freeze a map at a moment that matters: before the pilot, before the interview, before the results came in. Later, ask what changed since. Arguma lists the verdicts that moved, the thoughts you added or removed, the links you drew, and the conclusions whose confidence changed. Up to thirty per map.
Maps are walls on purpose: a link can't cross them. A reference is the one exception. Pin a thought from another map into this one and it shows that map's title and verdict, live. When the hypothesis is falsified over there, every conclusion resting on it here is flagged. A belief you settled once becomes evidence everywhere you use it, without copying it.
Start a new map from a structure instead of a blank canvas. Three come built in: a post-mortem, a decision between options, and a literature review. Save any map of your own as a template, and the titles, guidance and links carry over while the verdicts start fresh.
Sharing stays free. Plus turns a share link into a page you can send to a client or a committee: a readable address like arguma.io/c/why-signups-dropped, a description under the title, an optional password, an expiry date, and no sign-up prompt, so it reads as your document.
Free gives you five. Plus removes the count, so a new question never has to wait for an old one to be deleted. Every map keeps its own structure; labels and search still work across all of them.
Whatever Plus costs when you subscribe is what it costs you for as long as you keep it. Later increases apply to new subscribers, not to you. And if Plus is not what you expected, write within fourteen days and you get a full refund.
Real screens from the app, not mockups.
A reasoning tool has to be trustworthy about your reasoning. These are not negotiable.
Cancelling changes what tools you can use, never what you made. Every map, thought, link, snapshot, template, reference and published page stays exactly as it is, editable and exportable. The paid tools pause; your work doesn't.
JSON, Markdown and PNG export stay on the free plan for good. Arguma is a workspace for your thinking, not a cage for it.
No trial that quietly converts, no weekly billing, no cancellation maze. Cancel in your account settings and it's done.
A map is one canvas: one question, one decision, one investigation, with all of its thoughts and links. The two maps you get at signup (the example and your first map) count toward the five, and deleting the example frees a slot.
Your account returns to Free. Nothing is deleted or changed; the paid tools pause. Precisely:
Yes. Whatever price you subscribe at is the price you keep, for as long as the subscription stays active. When Plus costs more later, it costs more for new subscribers, not for you.
If Plus isn't what you expected, write within 14 days of paying and you'll get a full refund. No form, no reasons required.
Not yet. Arguma is a personal reasoning workspace today. If you're a lab, a class, or a team that wants shared maps, write to us: those conversations shape what gets built next.
Put the reasoning where you can see it. Upgrade when it matters what changed, and why.