PCWattVault vs ViewKit

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

PCWattVault compared with ViewKit
Detail	PCWattVault	ViewKit
What it does	Real-time PC power consumption monitor for Windows with electricity cost tracking	Free in-browser viewer for scientific and ML data files
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Not given
Pricing	Free. All Pro features are currently free for early adopters with founder/early-adopter status.	Free
Key features	Local-first with no cloud sync, no accounts and no telemetry	Browse HDF5 groups, datasets and attributes Read Parquet schemas, row groups and column statistics Open Zarr v2 and v3 stores from a folder or a zip Inspect Apache Arrow and Feather files View CSV, TSV and Excel spreadsheets Load NumPy .npy and .npz arrays List safetensors tensors and step through TFRecord records Slice N-dimensional arrays and render heatmaps Parse every file locally, with no upload Work offline after page loads
What makes it different	Permanent history recording in background so no data gaps occur Founder status guarantees all current Pro features remain free forever	All data processing happens in your browser with no server uploads Opens very large files by reading only the bytes you view No installation, account or login required Comprehensive articles explaining data format specifications
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	2 −1 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	0
Citation Flow (Majestic)	1	22
Referring domains (Majestic)	2	20

4 details filled in for both companies.

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