TP/OS
TP/OS is web-based transfer pricing software from ArmsLength AI for advisory firms and multinational in-house tax teams.
What TP/OS is
TP/OS is web-based transfer pricing software from ArmsLength AI for advisory firms and multinational in-house tax teams. It organizes source facts, reuses templates, and supports drafting and annual documentation updates. The product can create Local Files and Master Files in localized outputs following a customer’s chosen structure. Its assistant reads source files, fills supported placeholders, and flags omissions or contradictions for review. Teams can request missing details from colleagues, track progress, and review content before sharing. The software exports editable Word files in the customer’s house style. A guided trial covers one Local File prepared the prior year, allowing users to review its output and next-year update. Setup depends on the customer’s templates and documentation needs, and the company asks customers to confirm country scope and outputs with its team. ArmsLength AI says its controls are ISO/IEC 27001 certified, customer project data is stored and processed in the EU, and customer inputs are not used to train foundation models. SSO/SAML is available through Microsoft Entra ID and Google. Pricing is on request.
Good
- Supports Local Files and Master Files.
- Flags omissions and contradictions for review.
- Exports editable Word files in house style.
- Includes role-based review workflows.
- Customer project data is stored and processed in the EU.
Watch out
- Pricing is on request.
- Setup depends on customer templates and documentation needs.
- Country scope and outputs need confirmation with the company.
Who it suits
TP/OS suits transfer pricing advisory firms and multinational in-house tax teams preparing documentation. It is intended for teams willing to align setup with their templates and country scope.
Verdict
TP/OS combines document drafting, review coordination, and annual update workflows for transfer pricing teams. Customers should confirm the required country scope and outputs before settling on a setup.
Plans and prices
From TP/OS's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Base | Priced on request | Few countries, standard files, best-practice starting point · Ready data model and fields · Ready documentation templates · Role-based review flow · Guided onboarding (your team implements) · Pricing on request |
| Custom | Priced on request | Multiple countries, existing files, tailored setup needed · Includes all Base features · Custom data model extensions · Custom templates and report structure · Joint rollout (we configure together) · Pricing on request |
| TP/OS Documentation | Priced on request | Country scope and outputs confirmed during setup · guided onboarding discussed with provider |
| Turnkey | Priced on request | High complexity across countries, done-for-you implementation · Includes all Custom features · Complete data setup done by our team · Country-by-country template setup · Done-for-you rollout by our team · Pricing on request |
The facts
Each one read from TP/OS's own pages, with the date it was checked.
What it does
- Access and SSO
- The security page states that SSO/SAML is available via Microsoft Entra ID and Google, with role-based access controls.checked 4 Oct 2026
- Access controls
- Internal access uses least-privilege and role-based controls, with support access limited to necessary scope.checked 15 Oct 2026
- AI drafting
- AI helps draft documentation sections for human review.checked 15 Oct 2026
- AI extraction
- AI helps extract facts from supplied source material.checked 15 Oct 2026
- AI training policy
- Customer inputs are stated not to be used to train foundation models.checked 15 Oct 2026
- AI workflow
- The assistant reads source files, fills supported placeholders, and flags omissions and contradictions for review.checked 4 Oct 2026
- Annual roll-forward
- Teams can reuse mappings and templates for the next annual documentation update while reviewing changed facts.checked 15 Oct 2026
- API capabilities
- The API exposes search, paragraph retrieval and LLM-oriented context-pack endpoints.checked 15 Oct 2026
- API licence
- The OpenAPI specification labels the public API licence proprietary and subject to ArmsLength AI terms.checked 15 Oct 2026
- Audit-log retention
- Raw audit logs are retained for 30 days and then anonymised, with CSV or JSON exports available on request.checked 15 Oct 2026
- Client data and AI
- The company says customer inputs are used to generate that customer’s outputs and are not used to train foundation models.checked 4 Oct 2026
- Collaboration workflow
- The interface shows entity projects, review checkpoints and requests for missing inputs from colleagues.checked 15 Oct 2026
- Encryption
- Data is protected with encryption in transit and at rest.checked 15 Oct 2026
- EU hosting
- Customer project data is stated to be stored and processed in the European Union.checked 15 Oct 2026
- Founders and roles
- A LinkedIn announcement identifies Sven van der Heide as co-founder and Borys Ulanenko as the transfer-pricing specialist leading the venture, with Szymon Koprek as full-stack developer.checked 15 Oct 2026
- Group coverage
- The product is presented for multinational in-house teams managing several entities and jurisdictions.checked 15 Oct 2026
- Incident notification
- The company says affected customers are notified within 24 hours after awareness of a qualifying security incident.checked 15 Oct 2026
Money
- API free-tier limits
- The documented free tier allows 60 search requests, 30 paragraph requests and 20 context-pack requests per minute.checked 15 Oct 2026
- Guided trial
- ArmsLength AI offers a guided trial based on one Local File prepared in the prior year and its next-year update.checked 15 Oct 2026
The company
- Company
- ArmsLength AI describes itself as a transfer pricing software company built by practitioners.checked 4 Oct 2026
- Company benchmark history
- The launch post says ArmsLength AI had analyzed more than 1,000,000 companies before introducing TP/OS.checked 15 Oct 2026
- Company legal registration
- BizRaport records ArmsLength AI spółka z ograniczoną odpowiedzialnością under KRS 0001130933.checked 15 Oct 2026
- Company registration date
- The Polish company register entry date is 7 October 2024.checked 15 Oct 2026
- Headquarters
- Kraków, Polandchecked 28 Sep 2026
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