Category: Enterprise Search
8 European alternatives to Apache Solr — GDPR-compliant & EU-hosted.
Open-source (Apache 2.0) enterprise search platform from the Apache Software Foundation with full-text, vector and geospatial search.
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Facts
- Headquarters
- US (US)
- EU adequacy decision
- Only for companies individually certified under the EU-US Data Privacy Framework
- Sovereignty model
- Open-source, distributed
- Category
- Enterprise Search
- Type
- Product
- GDPR-compliant
- No
- Open-source
- Yes
- Data hosting
- US
Sources
Public sources used in the latest check of this record.
Compliance evidence
The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".
No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction
Sovereignty profile of Apache Solr
How this vendor scores on the five dimensions of the Digital Sovereignty Heatmap: 0 is sovereign, 100 is high exposure. These are the same scores the assessment uses.
| Jurisdictional exposure (JES) | Headquartered in the US: CLOUD Act and FISA 702 | 90 |
|---|---|---|
| Data residency (DRS) | No EU hosting (US) | 0 |
| Cryptographic key sovereignty (CKS) | Self-hostable: encryption keys under your own control | 10 |
| Platform lock-in (PLS) | Open source: low switching costs | 20 |
| Source & runtime sovereignty (SRS) | Source code auditable, forkable and self-hostable | 35 |
| Average | 31 |
Why digital sovereignty matters with Apache Solr
Apache Solr is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.
Apache Solr hosts data outside the EU (US). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and drives the data residency score up.
Apache Solr is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.
What this means for your organisation depends on your whole stack and context. The free assessment weighs Apache Solr together with your other vendors and gives a total score, a heatmap and the main risk drivers.
Top EU-based & GDPR-compliant alternatives to Apache Solr
The European alternatives to Apache Solr come from our knowledge base of over 3,600 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.
- Dassault Exalead↗
Dassault subsidiary providing enterprise search, data discovery and the CloudView search engine platform.
FR · commercial
- Elasticsearch↗
Distributed, open-source search engine and analytics platform with commercial enterprise features; Netherlands-headquartered with major US operations.
NL · open-source
Frequently asked questions
What is the best European alternative to Apache Solr?
It depends on your use case. Strong EU alternatives to Apache Solr include AddSearch, Cludo and Dassault Exalead. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.
Are there open-source alternatives to Apache Solr?
Yes. Open-source EU alternatives to Apache Solr include Datafari and Elasticsearch. These keep your data fully under your own control and let you self-host if you want to.
Is Apache Solr GDPR-compliant and where is the data hosted?
Apache Solr is headquartered in US and hosts data in US. Its GDPR compliance is limited or unclear. For full EU data residency the EU alternatives on this page usually offer more certainty.
Digital sovereignty in Enterprise Search
Enterprise Search: Internal knowledge and document search across company tools, wikis and file stores. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.
Also in this category
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