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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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Solr | Star Stack

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Solr

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Solr

Name: Solr
Author: Star Stack

Open-source distributed search platform built on Apache Lucene

Visit Website GitHub 1.7K

About

Solr is an open-source search platform that provides distributed indexing and load-balanced querying. It leverages Apache Lucene to handle full-text, vector, and geospatial search capabilities for large-scale datasets.

Resources

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Sovereignty Score

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

out of 100

Data completeness53% (Partial)

Jurisdictional(56%)

Significant foreign legal exposure risk

Jurisdiction: China (EU adequacy decision)
Parent provider Apache APISIX Project country unknown (assumed non-adequate) (Submit verified data to improve this score)
Five Eyes intelligence alliance exposure
US CLOUD Act applies (US can compel data access regardless of storage location)

Ownership(44%)

Strong EU ownership and control

Foundation-owned (non-profit)
Funding stage unknown (assumed late-stage VC) (Submit verified data to improve this score)
No acquisition risk (foundation/government cannot be acquired)

More dimensions coming soon

GovernanceComing soon

PortabilityComing soon

LicenseComing soon

CommunityComing soon

How missing data affects scores Submit data corrections

Provider

Apache Software Foundation

Quick Facts

Legal jurisdiction: United States
Headquarters: United States
Ownership: Foundation
Deployment: Self-host, 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 90%.
Read evidence excerpt
Lucidworks, Inc. in San Francisco, CA headquarters at 235 Montgomery St Ste 500, San Francisco, California 94104
hqCountry: other
Retrieved 30/01/2026, confidence 90%.
Read evidence excerpt
Lucidworks, Inc. in San Francisco, CA headquarters at 235 Montgomery St Ste 500, San Francisco, California 94104
Ownership: other
Statement 12/02/2026, confidence 90%.
Read evidence notes
From enrichment pipeline 2026-02-06_03-32-59_c6_v20-validation