ExyonQ vs Umwelt

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

ExyonQ compared with Umwelt
Detail	ExyonQ	Umwelt
What it does	Modular HTTP server and reverse proxy built for real sites and application edges	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	Open source	Open source
Pricing	Not given	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	Static file serving FastCGI and PHP-FPM support TLS and mTLS HTTP/2 and HTTP/3 support Hot reload without dropping traffic Health checks Weighted balancing with failover Per-listener HTTP cache with ETag support WASM request-filter plugins Config converter from nginx and HAProxy	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	Written in Rust for safety and performance Hot reload without dropping traffic Configuration converter from nginx, HAProxy, ingress-nginx and Envoy Parity matrix comparison with major load balancers	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)	21 +2 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	0	12
Referring domains (Majestic)	0	1

4 details filled in for both companies.

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