Kostos

No-account, end-to-end encrypted group bill splitter that works offline.

Webfreeglobal

Kostos is a privacy-first bill-splitting PWA for friends, housemates, and trip groups that requires no account: a secret token identifies the group, and every update is end-to-end encrypted before it syncs. It supports even, weighted, or exact-amount splits, multi-currency expenses, and a minimum-transfer plan to settle up efficiently, and works offline. It is also self-hostable for groups that want to run their own instance.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Kostos - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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