Mammoth CSV - spreadsheet for huge files
Also a Business Intelligence tool and an agile ETL
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This is 1 of 125 launches in financial data and accounting tools — see how it stacks up on momentum and crowding →
195 other launches read as similar to this one →
Details
- External ID
- 1270945
- Source
- PH
- Company
- —
- Product
- Mammoth CSV - spreadsheet for huge files
- Website domain
- producthunt.com
- Launched
- Oct. 6, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.3258772542988956
- Tags
- Spreadsheets, Data & Analytics, Business Intelligence
- Fetched at
- Oct. 7, 2026, 1:01 a.m.
- Updated at
- Oct. 7, 2026, 1:01 a.m.
Description
It handles tens of gigabytes with confidence, letting you load, explore, filter, transform, and aggregate massive files with impressive speed and lean memory usage. Supports not only CSV, but all delimited data files and also PARQUET, EXCEL and JSON. Compressed files (ZIP, GZ) can be opened directly.
Enrichment
- Niche
- financial data and accounting tools
- Vertical
- Horizontal
- Function
- Analytics & BI
- Audience
- Prosumer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- spreadsheet and etl tool for large csv files
- Manually corrected
- False
Could you build this?
No Handling tens of gigabytes in a high-speed, low-memory spreadsheet requires high-performance systems programming (like Rust/C++), out-of-core memory mapping, and custom columnar query engines.
What it would actually take: A production version would require an embedded analytical database engine (e.g., DuckDB or custom Arrow/DataFusion implementation in Rust) with chunked memory-mapped I/O and zero-copy virtualization for the UI. High performance virtualized table rendering that handles millions of rows at 60fps without choking memory is mandatory. This requires deep systems engineering, file format parsing expertise (Parquet, compressed CSV), and database internals knowledge.
Competitors
Other products that read as similar to this one — 195 launches clear the similarity bar, closest 8 shown.
Attention rank: #84 of 196 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 336 days after the earliest competitor.
- Less-sheet · hn · 2026-09-04 · 5 upvotes · similarity 0.57
- CSVTools · ph · 2026-09-30 · 2 upvotes · similarity 0.54
- CSV Viewer Online · ph · 2026-09-09 · 1 upvotes · similarity 0.54
- Datadaive · ph · 2026-09-14 · 1 upvotes · similarity 0.51
- Convert369 · ph · 2026-09-16 · 1 upvotes · similarity 0.51
- cssv · github · 2026-10-02 · 25 upvotes · similarity 0.49
- DataToolForge · ph · 2026-10-04 · 2 upvotes · similarity 0.49
- 5 No-BS Standalone Offline Desktop Tools · ph · 2026-09-14 · 1 upvotes · similarity 0.48
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a analytics & bi tool for Legal yet.