HyperCell – Open-source Excel calculation engine for Java

Hacker News

Hi HN! I built HyperCell to solve a problem we kept hitting at our company (Scoop Analytics): Business teams model everything in Excel – pricing logic, risk calculations, financial forecasts. Engineers then rewrite that logic in Java. Every time. This translation process causes bugs, delays, and drift between "what the business thinks the logic is" vs "what's actually running." HyperCell takes a different approach: load the Excel file, compile the formulas into a DAG, and execute them in-memory. No translation. The spreadsheet IS the code. Technical details: - Parses Excel formulas using ANTLR4 - Builds a dependency graph for intelligent recalculation - 200+ functions (SUM, VLOOKUP, INDEX/MATCH, IF, NPV, IRR, etc.) - Cross-validated against Excel with 82,881 formulas at 100% accuracy - ~50ms to load a typical workbook, sub-millisecond recalculation Use cases we've seen: - Insurance companies running rating models - Fintech doing real-time pricing - E-commerce with vendor-specific shipping rules It's Apache 2.0 licensed. We extracted it from our production system where it's been running for 2+ years. Happy to answer any questions about the architecture or implementation!

Visit product View on Hacker NewsDec 30, 2025

Share card

Actual performance

3points

Did not reach leaderboard

Launch Intel predictions

Analyze your own launch →

Indie HackersFits the IH revenue-focused audience · Missing: supports, reddit linkedin, podcasting

93%93% predicted probability of success on Indie Hackers, based on ML models trained on real launch data.

best fitHighest predicted score across all platforms for this description.

Product HuntOn track for Day 1 leaderboard · Strong signals: model, models, using · Missing: mac, agents, macos

85%85% predicted probability of success on Product Hunt, based on ML models trained on real launch data.

Hacker NewsStrong engagement from HN community · Strong signals: io · Missing: https docs, excited, just released

59%59% predicted probability of success on Hacker News, based on ML models trained on real launch data.

nativeThis product was originally launched on this platform.

TrustMRRLess likely to generate early MRR · Missing: mobile apps, ios, personal

42%42% predicted probability of success on TrustMRR, based on ML models trained on real launch data.

Acquire.comPre-revenue stage for this audience · Missing: arr, mrr, revenue

20%20% predicted probability of success on Acquire.com, based on ML models trained on real launch data.

AppSumoMay struggle as an AppSumo deal · Missing: plus, platform, intuitive

17%17% predicted probability of success on AppSumo, based on ML models trained on real launch data.

BetaListMay not resonate with beta-testers · Missing: web3, chat, crypto

0%0% predicted probability of success on BetaList, based on ML models trained on real launch data.

Incorrect prediction on native model

Similar products

Qake WebGL Voxel Engine released open source75%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Qake WebGL Voxel Engine released open source

Hacker News5

ioquake3 – An Open-Source Quake 3 Engine72%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

ioquake3 – An Open-Source Quake 3 Engine

Hacker News1

Beehive – An open source IFTTT powered by Go's templating engine66%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Beehive – An open source IFTTT powered by Go's templating engine

Hacker News247

Open-source web voxel engine80%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Open-source web voxel engine

Hacker News4

Open source scripting Excel with Python71%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Open source scripting Excel with Python

Hacker News1

Open-source M.U.G.E.N fighting engine using Godot75%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Open-source M.U.G.E.N fighting engine using Godot

Hacker News2

Scriggo – a Go open-source template engine and embeddable interpreter67%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Scriggo – a Go open-source template engine and embeddable interpreter

Hacker News15

An open source tool to generate Jet Engine compressors77%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

An open source tool to generate Jet Engine compressors

Hacker News35

Open-source Swagger/OpenAPI documentation engine75%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Open-source Swagger/OpenAPI documentation engine

Hacker News6

Lumix Engine – Open source C++ 3D game engine77%Launch Intel prediction score: how likely this product is to succeed on its source platform, based on its name, tagline, and description.

Lumix Engine – Open source C++ 3D game engine

Hacker News260

Browse all products Analyze your launch