Killer Budget

Short version

KillerBudget is a free web app for zero-based (envelope-style) budgeting, with month-to-month balance carry-over, savings goals and spending reports. The free version places no limits on accounts, categories, transactions or history. The site is responsive for phones and shows no bank connection.

Research-based profile, not hands-on testing. Last checked 2026-10-09 from the vendor's site, privacy policy and terms, the sign-in page and the Wayback Machine. I did not sign up, start a trial or enter any data.

Who is behind it

The privacy policy and terms name 2501 sp. z o.o., a company registered in Poland, as the creator and operator, with data hosted in Poland. That settles the identity question that held this listing back earlier. A thread on a budgeting forum, written by the creator and read here only through a search snippet (Reddit cannot be opened), says he built it for his own use and keeps it free. That is the vendor's own account, so it is not independent evidence.

Status

killerbudget.com and app.killerbudget.com are live, and archive captures go back to early 2022. There is no changelog, store listing or dated release, so recent development cannot be confirmed. The policy and terms are dated September 2020.

Cost

Free. The site refers to 'the free version' and the terms mention paid plans and a free-to-paid upgrade path, but no paid plan or price is published.

Privacy

The policy says data is never sold. It states TLS in transit and encrypted backups, and it openly says most data is not encrypted while stored in the live database. After cancellation, content is removed from live systems within 30 days and from backups within 60. No two-factor option and no independent audit are documented. Access and portability requests are handled by email.

What is distinct

Not much has been confirmed. It follows the established zero-based method and its creator describes it as a free alternative to a paid app, so the angle is mainly price and a clean interface.

Not confirmed

Founded year; last update; bank sync; import/export; multiple budgets; scheduled or recurring items; debt tracking; reconciliation; paid-plan details.

Bottom line

A small, free, no-frills web envelope budget from a named Polish company, with a plain privacy policy but thin documentation and no visible release history. Fine to try if you want something free and manual; look elsewhere if you need bank sync, apps or proof of ongoing development. Ratings are set separately against a shared rubric.