Why people choose TwentyThird, and what it does not do.

The choice

A licensed psychologist who knows the member designs Oneli, the agent they talk to, and stays involved as the member changes. The member never writes a prompt. Nothing a psychologist sets can switch off safety routing, make Oneli diagnose or prescribe, or let it pretend to be human.

The reason

Decisions about a person’s care belong to someone licensed and accountable for them. The agent supports the member between appointments. Published research on language models used as therapists found inappropriate answers to some crisis scenarios; the studies are on the science page, with what they do and do not show.

What it costs

It is early access. Psychologists are being verified now, and not every member has one. Until a member has one, the agent works on its own and no human is alerted. Supervision is billed separately, €5–50 a month, set by the psychologist, on top of the Room plan. Depending on a person also means TwentyThird grows only as fast as psychologists join.

Documented atFor psychologists Safety Science

The choice

A member can invite people who know them, such as a partner, a friend, a parent or a sibling, to answer 12 questions about the relationship, in about 5 minutes. Oneli reads a summary of those answers and brings that view into what it asks. The member never sees what the invitee wrote.

The reason

A pattern is often easier to see from outside than from inside. Psychodynamic work looks at how a person relates, and relationships have two sides. This is our design reasoning; it is not a study result.

What it costs

A member has to ask people, and those people did not sign up: they consent before the questions start and can delete their answers at once. Because the member cannot read the answers, they cannot check what was said about them. Two people are free; up to 5 need the Room plan.

Documented atPrivacy policy Methodology

The choice

Oneli looks for what keeps coming back: the yes before you decide, the distance after closeness, the work that takes over. It names a loop in plain words, follows it through every Catchup and conversation, and gives the clinical term second.

The reason

The idea that people return to what they have not understood is Freud’s (1920), and it is the first of three ideas the method draws on. Plain words let a member test a reading against their life instead of taking it on trust.

What it costs

Readings are AI interpretations, not diagnoses, and can be wrong. TwentyThird has not been tested in a trial and publishes no efficacy data of its own. Psychodynamic thinking is one lens: someone who mainly wants step-by-step exercises will find fewer here.

Documented atMethodology Science Research

The choice

TwentyThird is not therapy, not an AI therapist, not a medical device and not a crisis service. Every message passes a separate risk check; when a message is serious, Oneli stops answering as usual and shows crisis lines. It will not diagnose, prescribe, promise outcomes or pretend to be human.

The reason

A product that supports people in distress should be understood correctly even when a single sentence of it is quoted out of context. The same limits are stated on the pages that describe the product and in llms.txt.

What it costs

The risk check is itself an AI model: it can miss things and can flag things that are fine. No human is alerted today. The crisis message inside a conversation is in English for now, with national crisis lines being added. A product that states its limits can look less capable than one that does not.

Documented atSafety Not an AI therapist

The choice

The database is hosted in Ireland and the servers run in Stockholm. Data is not sold, not used for advertising and not used to train models. No employer, clinic or other organisation receives member data or analytics. If a member has a psychologist, they choose item by item what that psychologist sees.

The reason

Intake answers, Catchups and conversations are special-category data under the GDPR, processed on explicit consent that a member can withdraw.

What it costs

“Stored in the EU” is not “every step in the EU”. AI requests pass through OpenRouter (United States) to Google Cloud, whose data centres are not limited to the EU. The transfer rests on Standard Contractual Clauses and the EU–US Data Privacy Framework, and providers are used only if they neither store prompts nor train on them. Every processor is listed on the privacy page.

Documented atPrivacy policy Safety

The choice

The free plan has no time limit. The Room plan has a 3-day trial that never charges you, and it can be cancelled from Settings with access to the end of the period. The report is a one-off. The psychologist sets their own supervision fee within a published band, and we recommend €15 or less.

The reason

Money is a reason people do not seek support, and a hidden price is a second barrier. The psychologist’s fee is theirs to set because it pays for their work, not ours.

What it costs

The daily conversation with Oneli, the Consulting Room, needs the Room plan after the trial, and supervision is paid on top of it. The pricing page does not yet say whether prices include VAT. The company plan is in early access and is quoted per employee, invoiced.

Documented atPricing For employers

The choice

TwentyThird is made by WelloWork AB in Uppsala, Sweden. It began inside WelloWork’s CognitiveLab, where a team of physicians with clinical and research backgrounds kept receiving personal questions from people struggling with anxiety and recurring patterns. The founder is John Muhammadi, M.D.

The reason

The about page states the rule: a figure on this site has a source, or it says it is an example. An internal claims register holds every claim that needs evidence before it is written, which is why words such as “first”, “only” and “best” are not used.

What it costs

A physician-led company is not a psychology practice: the supervising psychologists are separate licensed professionals who set their own fee. The team’s credentials are stated on the about page and nowhere further than that.

Documented atAbout How we handle evidence Fact sheet