Skillselion vs PNGine

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

Skillselion compared with PNGine
Detail	Skillselion	PNGine
What it does	Directory of Claude Code skills, MCP servers and marketplaces ranked by real installs	Declarative WebGPU in S-expressions that compiles to compact bytecode
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	PT
Pricing model	Not given	Not given
Pricing	Browsing the catalog, using the public catalog API, and accessing research datasets marked CC BY are all free. No paid plans or subscription charges.	Not given
Key features	Daily catalog updates from live registries Daily install count snapshots Automatic removal of dead repositories Open datasets with CC BY licensing Dated, frozen research censuses Public catalog API without API keys MCP protocol integration	Declarative WebGPU syntax using S-expressions SJON format for describing pipelines and passes Compact bytecode compilation Command-line interface for validation and compilation Browser API from 3 KB to 17 KB gzipped Mock GPU inspection tool Standalone HTML export
What makes it different	Ranked by actual adoption metrics, not paid placements Independent from tool makers Comprehensive ecosystem measurement through research Automatic quality gates and duplicate consolidation All statistics attributed and dated with no invented figures	Compiles to few hundred bytes compared to typical GPU programs Can embed compiled programs in PNG files Declarative syntax matches WebGPU spec 1:1 Runs anywhere WebGPU is supported
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)	35 +1 (up) since last check	14 +1 (up) since last check
Trust Flow (Majestic)	21	8
Citation Flow (Majestic)	43	34
Referring domains (Majestic)	187	310

4 details filled in for both companies.

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