FinLang is an open-source CLI tool for deterministic financial transaction categorisation using plain-text .fin rules. It provides an audit trail for each categorisation, supports locale-aware processing, and is designed for accountants and finance teams.
FinLang sits in PulseGate's Developer Tools category. It focuses on automating and auditing financial transaction categorisation with deterministic, rule-based logic. It is built as an open-source project for accountants. FinLang is open source under the AGPL-3.0 license. It runs on the command line.
FinLangHQ builds and maintains FinLang, and the product first shipped in 2025. Development happens publicly on GitHub with 14 stars and 59 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — FinLang occupies a relatively distinct niche. Key capabilities include transaction categorisation, plain-text rules, and audit trail. FinLang is currently in beta.
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