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Muster vs ViewKit

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

Muster compared with ViewKit
DetailMuster logo MusterViewKit logo ViewKit
What it doesMac menu bar app that shows which Claude Code, Codex or Cursor session needs you Free in-browser viewer for scientific and ML data files
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Not given
PricingFree Free
Key features
  • See which Claude Code, Codex or Cursor session needs you
  • Allow or deny a command from an alert without switching apps
  • See the agent's reason, the whole command or every option with Option-Down
  • Switch to any session with Option-Tab
  • Search sessions from the last three hours
  • View tokens and API cost per session
  • Native macOS AppKit interface
  • Supports remote sessions over SSH
  • 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
  • No switching required to approve requests
  • Open source with full code transparency
  • Privacy by default with no analytics
  • Manage multiple sessions from one menu bar
  • 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 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)2 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)30
Citation Flow (Majestic)1822
Referring domains (Majestic)2420

4 details filled in for both companies.

More alternatives to Muster More alternatives to ViewKit

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