# Security and data. Purser prepares. You decide. Page: https://purserhq.com/en/security/ Last updated: 2026-11-12 Purser is made by ASF Studio AB (reg. no. 559530-9385), Nacka, Sweden. Contact: hej@purserhq.com. > **Short answer.** The books are stored on Purser's server at Cloudflare. The session runs on your Mac with your own Anthropic or OpenAI account, and Purser's servers never pass sessions on. Nothing is booked or sent without your yes, and Purser can't approve its own proposals. Purser never makes payments and never signs. Everything can be exported as SIE 4. ## Where are the books stored? The books are stored on Purser's server at Cloudflare. The session, the conversation between you, Purser and your AI, runs on your computer with your own Anthropic or OpenAI account. The server holds the books, not your AI. What is booked stays when a session ends, and questions and answers are saved, so nothing is lost with the conversation. ## What happens on your Mac? Purser Desktop works on your computer. It runs your schedules, fetches from the sites you're signed in to and reads the folders you point it at. The bank statement is fetched from your online bank in a browser on your computer, or you upload it as CSV or camt.053. Where a sign-in needs BankID, the Swedish e-ID, you sign in yourself. Which Mac you need is on [Get started](https://purserhq.com/en/get-started/). ## What is sent to my AI provider? What you write, and what Purser gives your AI to do the work: the books, the rules and the tools. It goes from your computer straight to your AI provider, and Purser's servers never pass sessions on. Purser is an independent program, and you have your own agreement with your AI provider. ## What may Purser do without asking? Prepare. Purser reads the books, does the sums and lays out proposals, but nothing is booked or sent without your yes, and Purser can't approve its own proposals. When something would change the books or leave Purser, an Allow card shows what is about to happen. You answer Tillåt en gång (allow once), Tillåt alltid (always allow) or Neka (deny). Always allow covers that one action from now on, and you can remove each such rule in Settings. The rules live in the books, not in the AI: the chart of accounts, VAT and periods are checked by Purser. ## What does Purser never do? Purser never makes payments and never signs. You do that in your bank and in Skatteverket's e-service (the Swedish Tax Agency). Purser prepares VAT, the employer return (AGI) and INK2 from the books, but the signing lands in Väntar på dig (Waiting for you), and you sign at Skatteverket with BankID. How a month works is on [How it works](https://purserhq.com/en/how-it-works/). ## How are mistakes corrected? Mistakes are fixed with a correction voucher, and the original stays. Undo reverses a booking. A booked voucher is never deleted. The correction is a new voucher, and what was corrected can still be read after the correction. ## How do I take my data with me? Export all of your bookkeeping as SIE 4 whenever you like, to an accountant or another program. SIE 4 is the file format Swedish bookkeeping programs use to move books between them, and the same format is used when you [switch bookkeeping programs](https://purserhq.com/byta-bokforingsprogram/) (in Swedish). ## How do I report a security issue? Email hej@purserhq.com and describe what you found. ## Frequently asked questions ### Who uses my BankID? Only you. You sign in and sign yourself with BankID, in your bank and in Skatteverket's e-service. Purser never signs. ### Can my accountant access the books? Not in Purser today. You can export all of your bookkeeping as SIE 4 and give the file to your accountant. ### How do I know the app comes from Purser? Purser Desktop is notarised by Apple and updates itself. ### Does purserhq.com set cookies? The site sets no cookies of its own. Visits are counted with Umami and Cloudflare Web Analytics, which both count without cookies. The [privacy policy](https://purserhq.com/en/privacy/) has the details. ### Who is responsible for my personal data? ASF Studio AB (reg. no. 559530-9385, Nacka, Sweden) is the data controller for what is collected on purserhq.com and in Purser. You can reach us at hej@purserhq.com. ## Related - [How it works](https://purserhq.com/en/how-it-works/) - [Privacy policy](https://purserhq.com/en/privacy/) - [Pricing](https://purserhq.com/en/pricing/) - [About](https://purserhq.com/en/about/) - [Get started](https://purserhq.com/en/get-started/)