The engine is live and free. Sync is the one thing that isn’t.
LEXUN’s decision engine has a free tier — no card, and no account with us. Running a decision needs nothing from you at all; saving it to your record needs a LEXUN Key: a free passcode that encrypts that record on your own device, not an account on ours. Free is unlimited decision runs, and always will be: the paid plans sell the record, not the run. Free: the full engine and unlimited decision runs, no card, no account; three saved decisions once checkout opens, and nothing is limited until then. Pro keeps every one. Reproducing a published result needs nothing at all. Paid plans are on /plans. Exports, PDF reports and the calibration view are built and open to everyone until checkout is switched on; from then they are part of Pro. This waitlist is for the one thing that is not built: encrypted sync across devices, released only when it passes the reliability gates. Join and we’ll email you once, when it’s ready.
By joining you consent to us storing this address and emailing you about LEXUN launches (encrypted sync across devices). Nothing else, no sharing, unsubscribe in one click. See Privacy.
Every forecast is frozen before reality answers. Every LEXUN forecast is written down, dated and frozen before the answer is known, then scored against what actually happened. The three decision models have no resolved outcomes yet and no accuracy percentage is claimed for any of them until ten have resolved in a domain (the editorial forecast board is scored separately and has six) — the scoring machinery ships with the product, the score does not exist yet, and both of those facts are on the record.
What you can use today, at no cost
Everything in this row is released and running in your browser right now. None of it is behind the waitlist.
Questions people ask before joining
Do I have to join to use LEXUN?
No. The waitlist is only for being told when encrypted sync ships, and the free plan works either way. You can frame and run a full decision without one. The dashboard asks you to create a LEXUN Key at the point you save that decision to your record: a passcode that encrypts the record on your own device. A Key is free, takes about twenty seconds and is not an account, because we receive an email address and nothing else. Reproducing a published result and reading the accuracy record need nothing at all.
What will you actually email me?
One email when encrypted sync is ready, and occasional notes when something material ships — a new model, a methodology change, a published calibration update. No drip sequence, no newsletter you did not ask for, and an unsubscribe link in every message.
When does encrypted sync ship?
There is no date, and we will not invent one. Each feature is released only when it passes its reliability gate, and the honest position is that gates decide the schedule rather than the other way round. The roadmap page lists what is planned and clearly marks it as planned.
What happens to my email address?
It is stored so we can send that email and nothing else. It is not sold, not shared for anyone else's marketing, and never joined up with decision data — your decisions stay in your browser and never reach us (the optional Copilot, which sends only what you deliberately type or ask it to summarise, is the one exception). Ask us to delete it and we will, then confirm.
Is anything free going to be taken away later?
No. The three released models, the probability bands, the challenge view and local-first storage stay free. The paid tier is for things that cost us money to run — encrypted sync across devices, exportable reports and reminders — not for re-selling what already works.
How do I know the numbers are honest?
Because you can check them without trusting us. The methodology is published, every result is seeded so identical inputs reproduce identical outputs, each result is sealed with a SHA-256 hash you can verify yourself, and the accuracy record shows a true zero until there are enough resolved outcomes to score.
Built to be trusted, not to hype
LEXUN is decision support — not financial, medical, or legal advice. Every answer shows its confidence and its assumptions, and points you to a professional for serious matters. As genuine outcomes resolve, LEXUN can measure where each model is overconfident or underconfident — any recalibration will be versioned and published, never silent.