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ViewKit vs Steward

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

ViewKit compared with Steward
DetailViewKit logo ViewKitSteward logo Steward
What it doesFree in-browser viewer for scientific and ML data files A Mac app that turns GitHub pull-request notifications into a sorted inbox with AI-assisted code review
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelNot given Paid
PricingFree $10 one-time purchase at launch, then $20 for future customers. All future updates included. 14-day free trial available.
Key features
  • 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
  • Sorted inbox that separates pull requests into Needs my eyes and FYI categories
  • Morning report with daily briefing of pending reviews
  • Layered diff viewer with logical code organization
  • Code folding for TypeScript, JavaScript, and Ruby
  • Keyboard shortcuts for quick actions
  • Reviews ranked by importance and impact
  • Automatic morning report even when app is quit
What makes it different
  • 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
  • Layers diffs logically by code flow rather than alphabetically so you read them in writing order
  • Separates actionable notifications from informational ones so less noise reaches your inbox
  • Runs entirely on your Mac with no code sent to external servers
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)220
Referring domains (Majestic)200

4 details filled in for both companies.

More alternatives to ViewKit More alternatives to Steward

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