Modeleon
Python DSL that compiles to live Excel formulas
Details
- External ID
- 47972987
- Source
- HN
- Company
- —
- Product
- Modeleon
- Website domain
- github.com
- Launched
- May 1, 2026
- Cohort
- —
- Upvotes
- 6
- Upvotes percentile
- 0.3053311793214863
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
Hi HN. Modeleon is an open-source Python DSL for financial models. You write models in Python with named variables and operator-overloaded arithmetic, and it compiles to a real .xlsx with live formulas — not values, but formulas like =B4*B5 that the CFO can audit in Excel.The architectural bet is "model is the source of truth, spreadsheet is one rendering." We have a Walker/Renderer split so the same model can target Excel today and other backends later.We've been building this for finance + Python developers (CFA candidates with Python skills, FP&A analysts who automate). It's pre-alpha — works, but the API will change before 1.0.Apache 2.0. PyPI: pip install modeleon. Happy to answer questions.
Enrichment
- Theme
- spreadsheet and tabular data tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- python to excel formula compiler
- Manually corrected
- False
Could you build this?
Partial While basic Python AST manipulation is approachable, building a robust financial modeling DSL that translates arbitrary DAG-based computations into valid, audit-ready Excel formula trees requires intricate compiler design.
What it would actually take: The architecture requires an AST/symbolic expression engine in Python (like SymPy or custom operator-overloaded nodes) that builds an execution graph, topological sorter, and an OpenXML/openpyxl formula generator that translates variable references to relative grid coordinates ($A$1). The hardest part is handling cycle detection, multi-dimensional time series alignment, and translating complex financial idioms into valid spreadsheet formula strings. Deep familiarity with compiler symbol tables and spreadsheet formula grammar is necessary.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one — 65 launches clear the similarity bar, closest 8 shown.
Attention rank: #54 of 66 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 163 days after the earliest competitor.
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- AIExcel · ph · 2026-09-18 · 3 upvotes · similarity 0.43
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- DSS, a lightweight TUI spreadsheet editor and dashboard in Go · hn · 2026-04-26 · 7 upvotes · similarity 0.41
- FormuRay · ph · 2026-09-11 · 1 upvotes · similarity 0.40
- Python SDK · hn · 2025-12-18 · 43 upvotes · similarity 0.39
- FormulaAI · ph · 2026-09-30 · 1 upvotes · similarity 0.38
- Frockly · hn · 2025-12-25 · 56 upvotes · similarity 0.38
Other launches for this product
- No other launches for this product.
Same idea, different domain
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