PluginView vs Umwelt

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

PluginView compared with Umwelt
Detail	PluginView	Umwelt
What it does	Website technology detector that scans public websites to identify plugins, frameworks, analytics tools, and other web technologies	An epistemic state engine that tracks what each character knows, and how they learned it
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Open source
Pricing	Free plan with 100 credits/month (no API, no bulk jobs). Developer $12/mo with 1,000 credits/month, 3 concurrent scans, and 100 URLs per bulk job. Growth $39/mo with 5,000 credits/month, 10 concurrent scans, and 500 URLs per bulk job. Business $99/mo with 20,000 credits/month, 25 concurrent scans, a	AGPL-3.0-only open source license. Commercial license available for closed-source products, services and hosted APIs. Free Play Exception covers free games, mods, interactive fiction and tabletop tools (excluding games with price, in-game purchases, ads, paid content or early access).
Key features	Scans against 7,540+ proprietary fingerprints Confidence scores with plain-language explanations API access for developers and integrations	Tracks what each character knows and how they learned it Prevents AI models from leaking story information or twists Records confirmed history that is never deleted Single portable .umw file for entire world state Works across TypeScript, .NET, CLI and any language via JSON protocol Query from any character's point of view at any moment in time Performance of 55-65 microseconds per query with half a million holdings Free Play Exception for non-commercial games and tabletop tools
What makes it different	Evidence-based detections with proprietary fingerprints not published or disclosed No authentication bypass, paywall circumvention, or advertising influence on results Hosted service with proxy bandwidth and browser workers for production use Capacity-based pricing model, not per-technology licensing	Separates world state from character knowledge to prevent narrative leakage Guarantees written down with conformance testing across all clients Idempotent writes ensure consistency across retries Works without AI or can control what AI models are allowed to know Open source with commercial licensing option for closed-source products
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)	4 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	4	12
Referring domains (Majestic)	1	1

5 details filled in for both companies.

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