Delta vs Pllume: which AI assistant for your session notes?

We make Delta. This page compares Delta with Pllume as honestly as we can, including where Pllume does better. Information about Pllume comes from its website, checked on 8 October 2026. When something is not published, we say so.

In short

• Pllume is built only for mental health and offers built-in questionnaires. It is in private beta, by invitation.
• Delta is open to everyone today, also covers allied health professions and lets you choose between transcription during the session and dictation after.

Pllume in a few lines

Pllume is a French tool for psychiatrists, psychologists, psychotherapists and neuropsychologists. It transcribes the session, telling speakers apart, then writes a clinical note that you review. It offers more than 30 note templates, keeps a memory of each patient's follow-up, includes questionnaires such as the GAD-7 or PHQ-9 and writes documents such as letters. Pllume states that data is hosted in France by an HDS-certified host and that identifying data is anonymised before the AI writes the note.

Delta in a few lines

Delta is an AI assistant for mental health and allied health professionals in France, Belgium and Switzerland. During the session, Delta transcribes what is said. Or after the session, you dictate your observations. Delta then writes the session report and adds it to the patient's record. The record updates itself with a summary of the follow-up, the goals being tracked and the topics for the next session.

Data is stored with a host certified for health data (HDS). The patient's name and anything that could identify them are pseudonymised before reaching the AI. No audio file is kept, and data is never used to train models. Delta costs €29 per month incl. VAT with a yearly plan, or €35 without commitment, after a 14-day trial with no credit card.

What sets them apart

Access

Pllume is in private beta, by invitation and with limited places. Delta is open to everyone, with a 14-day trial and no credit card.

How notes are taken

Pllume puts session transcription first. Delta offers two modes on an equal footing, transcription during the session or dictation after, chosen patient by patient. Dictation helps when a patient prefers nothing to be transcribed.

Documents

Both write letters and documents from the session. Pllume also includes questionnaires such as the GAD-7 or PHQ-9.

Professions

Pllume is limited to mental health. Delta also serves speech therapists, physiotherapists, psychomotor therapists, occupational therapists and other allied health professions, which matters in a multidisciplinary practice.

Price

Pllume is free during the beta, then announces €24 per month incl. VAT. Delta costs €29 per month incl. VAT with a yearly plan, €35 without commitment, and keeps a free version limited to 10 sessions per month.

Which one to choose?

Pllume suits you if you work only in mental health, want built-in questionnaires, and can wait for an invitation.

Delta suits you if you want to start now, choose between transcription and dictation depending on the patient, or work in a practice that also includes allied health professions.

Further reading

We also compare Heidi, Markus Santé, Pllume, myCR, PsyNote and ChatGPT in our comparison of AI note-taking software for psychologists.

Sources

Checked on 8 October 2026: Pllume, Pllume, pricing, Pllume, reference sheet.

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