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Databases · head to head

Apache Solr vs SonarQube

Apache Solr logo

Apache Solr

Databases

Enterprise search platform built on Apache Lucene

From
Free
Free plan
Yes
Visit Apache SolrFull review
SonarQube logo

SonarQube

Developer Tools

Code quality and code security for clean code, at every step

From
Free
Free plan
Yes
Visit SonarQubeFull review

The short version

  • Apache Solr is free; SonarQube starts at $34/mo.
  • Where Apache Solr falls short: XML-heavy configuration and a developer experience that feels dated beside newer engines.
  • Where SonarQube falls short: advanced Security add-on uses custom pricing.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Apache Solr and SonarQube actually diverge.

Attributes where Apache Solr and SonarQube differ
AttributeApache SolrSonarQube
Pricing modelOpen source, no licence feeSubscription
PlatformsLinux, Self-hostedWeb
CategoryDatabasesDeveloper Tools

Identical on both: starting price (Free), free tier (Yes).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Apache Solr

  • Lucene-based indexing
  • Faceted search
  • SolrCloud
  • Schema control

Only in SonarQube

Nothing recorded that Apache Solr does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Apache Solr

  • Library, archive and catalogue search where faceting is centralnot SonarQube
  • Long-lived enterprise deployments valuing stability over noveltynot SonarQube
  • Search requiring precise, explicitly configured relevance tuningnot SonarQube

SonarQube

  • Code quality analysisnot Apache Solr
  • Vulnerability detectionnot Apache Solr
  • Security scanningnot Apache Solr
  • Compliance reportingnot Apache Solr

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Apache Solr

  • XML-heavy configuration and a developer experience that feels dated beside newer engines
  • SolrCloud depends on ZooKeeper, adding a component Elasticsearch removed years ago
  • Smaller mindshare now, so newer tutorials, hiring and integrations favour Elasticsearch
  • Considerably heavier than a purpose-built application search engine

SonarQube

  • Advanced Security add-on uses custom pricing
  • Only private project lines of code count toward limits

Pricing, plan by plan

Apache Solr

Free
  • Apache SolrFree
    • Full functionality
    • No usage limits
    • Community support

SonarQube

Free
  • FreeFree
    • Supports up to 50000 lines of code in private projects
    • Never expires
    • Covers public projects
  • Team$34/mo
    • 30+ languages
    • Code quality standards
    • Bug and vulnerability detection
  • EnterpriseOn request
    • Advanced security reports
    • OWASP/CWE/PCI DSS compliance
    • Unlimited users and projects

Which should you pick?

Choose Apache Solr if

  • You need lucene-based indexing.
  • You want to start without paying.
  • You work on Linux, Self-hosted.
  • You also want faceted search.
Apache Solr review

Choose SonarQube if

  • You want to start without paying.
SonarQube review

Questions people ask

Is Apache Solr or SonarQube better?
Neither clearly leads. Apache Solr starts at Free and SonarQube at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache Solr or SonarQube?
Apache Solr starts at Free and SonarQube at Free.
Does Apache Solr or SonarQube run on more platforms?
Apache Solr runs on Linux, Self-hosted. SonarQube runs on Web.
Can I use Apache Solr for free?
Both have a free tier, so you can try either at no cost before committing.
What is Apache Solr best used for?
Apache Solr is most often used for library, archive and catalogue search where faceting is central, long-lived enterprise deployments valuing stability over novelty, search requiring precise, explicitly configured relevance tuning. Of those, library, archive and catalogue search where faceting is central and long-lived enterprise deployments valuing stability over novelty are not what SonarQube is typically brought in for.
What can Apache Solr do that SonarQube cannot?
Apache Solr covers Lucene-based indexing, Faceted search, SolrCloud, Schema control.

Answered from the vendors’ own pages

Apache Solr: Is Apache Solr free?

Yes, open source under the Apache Software Foundation.

SonarQube: How much does SonarQube cost?

SonarQube offers a free tier supporting up to 50000 lines of code in private projects, a Team plan starting at $34/month, and custom Enterprise pricing. Team plan includes 14-day free trial.

Source
Apache Solr: Solr or Elasticsearch?

Both are built on Lucene. Elasticsearch has the larger ecosystem and a friendlier API; Solr is very mature and strong on faceted search, and remains common in library and catalogue systems.

SonarQube: Is SonarQube free?

Yes, SonarQube offers a free tier that never expires and covers both public and private projects up to 50000 lines of code in private projects.

Source
Apache Solr: Is Solr still maintained?

Yes, actively, as a top-level Apache project.

SonarQube: What languages does SonarQube support?

SonarQube Team plan supports 30+ languages including common programming languages. Enterprise plan adds support for 40+ languages including ABAP, COBOL, and Apex.

Source
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