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Costflow

Natural-language interface for plain-text accounting

Budgeting & Finance ★ 33 stars Medium setup MIT

Costflow is an open-source parser that turns plain-language messages into Beancount, Ledger, or hledger entries. It lets users record transactions from chat apps and append them to a journal file.

Official siteSource code

Key features

  • Natural-language entries
  • Beancount and Ledger output
  • Chat app integration
  • Plain-text journals

Strengths

  • Released under the MIT license
  • Written in JavaScript
  • Tiny footprint — runs in 128 MB RAM

Is Costflow secure?

OSV.dev has no published security advisories for Costflow's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Costflow replaces

Self-hosted Expensify alternativesSelf-hosted Mint alternatives

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