Formulate vs Psychology Tools
Both are serious products built for evidence-based practice, and plenty of therapists will be well served by either. Their centres of gravity differ. Psychology Tools — built by a named team of clinical psychologists — is the reference library: the broadest, most translated collection of therapy resources available, now with client sharing at every tier. Formulate — built by a DClinPsy trainee — is designed around what happens between sessions: interactive worksheets, formulation, homework, and outcome tracking, without storing your clients' personal details. Here is how they compare.
Side by side
Psychology Tools figures are from their public pricing and help-centre pages, as of July 2026. Their prices are billed annually.
| Feature | Psychology Tools | Formulate |
|---|---|---|
| Entry price and billing | From £5/month on Core, billed annually (about £60/year). Annual billing only, on every tier. | From £3.99/month billed annually (£47.90/year), or £4.99/month billed monthly — cancel anytime. |
| Free tier | No free tier — a 14-day free trial with no card required. | Yes — 10 worksheet uses a month and up to 3 clients, free for as long as you like. New accounts also include 14 days of Practice. |
| Client caps | 5, 25 or 50 active clients by tier on individual plans (plus the same number archived). | 3 on Free and 8 on Starter — unlimited clients from Practice (£9.99/month, or £7.99/month billed annually). |
| Download limits | 50 downloads a month on Professional (£15/month); 100 a month on Premium (£25/month). Core's limit isn't publicly stated. | No download caps at any tier. |
| Client data model | Clients are added by name and email address and invited to create a Psychology Tools account. | No client personal details stored — clients never create accounts. You work with non-identifying labels; clients open a secure link. |
| Worksheet interactivity | Interactive versions shared through their platform at every tier — clients complete homework on a phone or tablet, and therapists review responses and activity. Fillable PDFs too. | Interactive worksheets clients complete on any device via a secure link — no app, no client account — with a review queue, homework plans, and due dates for the therapist. |
| Formulation tools | Formulation models available as static PDF resources; no interactive formulation builder in their public feature set. | 16 interactive, model-faithful formulation diagrams in the library — Clark & Wells, Ehlers & Clark, Salkovskis, and more — completed on screen and exportable. |
| Authoring and AI | Editable PowerPoint and Word downloads, so you can adapt resources in your own tools. No in-platform authoring or AI generation in their public feature set. | Generate worksheets with AI, import your own PDF or Word materials as interactive worksheets, and fork and customise anything in-platform. |
| Outcome measures | Scales and measures included as resources in the library. | 13 validated measures (PHQ-9, GAD-7, and more) with automated scoring and progress trajectories, on Practice and above. |
| Languages and library scale | 500+ resources across six types, with 3,500+ translations in 70+ languages. | 200+ resources and 16 interactive formulations — in English only. |
| Governance artefacts | ISO/IEC 27001 certification, with a choice of UK, US, Canada, or Australia data residency. | DTAC self-assessment, published Article 28 DPA, UK-hosted — and no client personal details held at all. |
Choose Psychology Tools if…
- You want the largest reference library — 500+ resources across six types, including audio, guides, and licensed titles.
- You work in languages other than English — 3,500+ translations across 70+ languages.
- You value paired versions of the same resource — a professional version for you and a client version to hand over.
- You prefer editing materials in your own tools — editable PowerPoint and Word downloads.
- A named, credentialed clinical team and ISO 27001 certification matter to you or your service.
- You bill in US, Australian, or Canadian dollars, or in euros — Formulate is priced in GBP only.
Choose Formulate if…
- You want to start free and pay monthly — a permanent free tier, monthly or annual billing, cancel anytime.
- Your caseload doesn't fit a cap — unlimited clients from Practice (£9.99/month, or £7.99/month billed annually), and no download limits at any tier.
- You'd rather store no client personal details at all — clients never create accounts, and no client names or emails are held.
- Formulation is central to your practice — 16 interactive, model-faithful diagrams in the library you complete with clients on screen.
- You want to author your own materials in-platform — AI generation, PDF and Word import, fork and customise.
- You track outcomes in therapy — 13 validated measures with automated scoring and progress graphs.
- You want UK governance artefacts from day one — a DTAC self-assessment, a published Article 28 DPA, and UK hosting.
Try it on the free tier
No card required — 10 worksheet uses a month, up to 3 clients, and every new account includes 14 days of Practice.
Comparison based on publicly available Psychology Tools pricing and help-centre pages, July 2026 — tell us if anything is out of date. Formulate is not affiliated with or endorsed by Psychology Tools.