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Disclaimer: Star Stack provides information about European technology services for educational purposes only. Service listings, sovereignty assessments, and recommendations do not constitute legal, financial, or professional advice. We encourage you to verify all information independently and consult appropriate professionals before making technology decisions. Star Stack is not affiliated with any listed services unless explicitly stated.

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51Degrees | Star Stack

Services
51Degrees

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51Degrees

Name: 51Degrees
Author: Star Stack

Real-time device detection and IP intelligence platform

Visit Website GitHub 113

About

51Degrees analyzes HTTP headers like User-Agent and Client Hints to identify device models, browsers, and locations in real time. It serves developers and businesses needing accurate user context without requiring cookie consent.

Resources

No migration guide is currently listed for this service.

Suggest a migration guide or report an outdated link.

Sovereignty Score

Recorded assessment version: jurisdiction-ownership-2026-10-04

out of 100

Data completeness50% (Partial)

Jurisdictional(56%)

Mixed jurisdictional situation, some foreign exposure

Jurisdiction: United Kingdom (EU adequacy decision)
No foreign parent provider
Five Eyes intelligence alliance exposure

Ownership(44%)

Strong EU ownership and control

Bootstrapped (self-funded)
Bootstrapped stage
Low acquisition risk (bootstrapped, no investor pressure) (No VC exit timeline, founders retain full control)

More dimensions coming soon

GovernanceComing soon

PortabilityComing soon

LicenseComing soon

CommunityComing soon

How missing data affects scores Submit data corrections

Provider

51Degrees.mobi Limited

Quick Facts

Legal jurisdiction: United Kingdom
Headquarters: United Kingdom
Ownership: Bootstrapped
Deployment: SaaS

Evidence and freshness

Verification date unknown. This assessment needs review.

A score is an assessment of recorded facts. Missing evidence and unresolved ownership can affect the result.

hqCountry: other
Retrieved 30/01/2026, confidence 94%.
Read evidence excerpt
51Degrees headquartered in Reading, Berkshire, United Kingdom
hqCountry: other
Retrieved 30/01/2026, confidence 94%.
Read evidence excerpt
51Degrees headquartered in Reading, Berkshire, United Kingdom