Best XML Databases

How Many XML Databases Products Does G2 Track?

Total Products under this Category: 22

Category Stats (Sep 2026)

  • Average Rating: 3.96/5 The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: InterSystems IRIS (+0.35%) - Among all products in this category, InterSystems IRIS recorded the largest rating increase compared to last month

Last updated: September 15, 2026

How Does G2 Rank XML Databases Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 900+ Authentic Reviews
  • 22+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for XML Databases

G2 Grid® for XML Databases plotting products by satisfaction and market presence

Highlighted products: IBM Db2, InterSystems IRIS, Flexter, Progress MarkLogic, Qizx, XMLSpy, Apache Santuario, and Apache Xerces.

Underlying data: [Grid® JSON](https://www.g2.com/categories/xml-databases/grids.json?focus%5B%5D=ibm-db2&focus%5B%5D=intersystems-iris&focus%5B%5D=flexter&focus%5B%5D=progress-marklogic&focus%5B%5D=qizx&focus%5B%5D=xmlspy&focus%5B%5D=apache-santuario&focus%5B%5D=apache-xerces)

InterSystems IRIS

InterSystems IRIS is a complete cloud-first data platform that includes a multi-model transactional data management engine, an application development platform, and interoperability engine, and an open analytics platform. It is the next generation of our proven data management software.It includes the capabilities of InterSystems Cache and Ensemble, plus a wealth of exciting new capabilities to make it easy to build and deploy cloud based, analytics-intensive enterprise applications with even greater performance and scalability. InterSystems IRIS provides a set of APIs to operate with transactional persistent data simultaneously: key-value, relational, object, document, multidimensional. Data can be managed by SQL, Java, node.js, .NET, C++, Python, and native server-side ObjectScript language. InterSystems IRIS includes an Interoperability engine and modules to build AI solutions. InterSystems IRIS provides features for horizontal scalability (sharding, ECP) and provides High Availability features, Business intelligence, transaction support, and backup.

Average Rating: 4.6/5.0

Total Reviews: 60

How Do G2 Users Rate InterSystems IRIS?

  • Ease of Use: 7.9/10 (Category avg: 8.3/10)
  • Quality of Support: 8.7/10 (Category avg: 8.2/10)

Who Is the Company Behind InterSystems IRIS?

  • Seller: InterSystems
  • Year Founded: 1978
  • HQ Location: Cambridge, MA
  • Twitter: @InterSystems
    61,310 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    2,151 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Computer Software, Hospital & Health Care
  • Company Size: 47% Small, 31% Medium

What Do G2 Reviewers Say About InterSystems IRIS?

AI-generated summary from verified user reviews

Pros
  • Users value the powerful features and flexibility of InterSystems IRIS, enhancing overall performance and user experience.
  • Users find InterSystems IRIS to be very easy to use, with a clean interface and helpful documentation.
  • Users commend the excellent performance and resource efficiency of InterSystems IRIS, enhancing reliability and speed in data handling.
  • Users praise the excellent customer support from InterSystems IRIS, appreciating timely responses and helpful assistance.
  • Users value the easy integrations of InterSystems IRIS, enabling seamless connectivity with various systems and flexibility.
Cons
  • Users find the difficult learning curve of InterSystems IRIS challenging, particularly for those new to the platform.
  • Users note that IRIS is not cheap, with licensing costs and hardware requirements posing challenges for smaller projects.
  • Users find the insufficient documentation for advanced scenarios complicates learning and effective use of InterSystems IRIS.
  • Users find the learning curve steep, particularly with advanced features and complex configurations, which can hinder initial experiences.
  • Users find the poor documentation for advanced scenarios challenging, making it hard to navigate complex features.

What Are Recent G2 Reviews of InterSystems IRIS?

What Are G2 Users Discussing About InterSystems IRIS?

IBM Db2

Built to run the world’s mission-critical workloads. Designed by the world’s leading database experts, IBM Db2 empowers developers, enterprise architects, and data engineers to run low-latency transactions and real-time analytics equipped for the most demanding workloads. From microservices to AI workloads, Db2 is the tested, resilient, and hybrid database providing the extreme availability, built-in refined security, effortless scalability, and intelligent automation for systems that run the world.

Average Rating: 4.1/5.0

Total Reviews: 600

How Do G2 Users Rate IBM Db2?

  • Ease of Use: 8.0/10 (Category avg: 8.3/10)
  • Quality of Support: 8.1/10 (Category avg: 8.2/10)

Who Is the Company Behind IBM Db2?

  • Seller: IBM
  • Year Founded: 1911
  • HQ Location: Armonk, New York, United States
  • Twitter: @IBMSecurity
    74,660 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    344,328 employees on LinkedIn®
  • Ownership: SWX:IBM

Who Uses This Product?

  • Who Uses This: Senior Software Engineer, Software Engineer
  • Top Industries: Information Technology and Services, Banking
  • Company Size: 66% Large, 21% Medium

What Do G2 Reviewers Say About IBM Db2?

AI-generated summary from verified user reviews

Pros
  • Users highlight the high performance of IBM Db2, appreciating its reliability and efficiency in managing large datasets.
  • Users praise IBM Db2 for its exceptional reliability, consistently delivering strong performance even under heavy workloads.
  • Users find IBM Db2 to be easy to use and integrate, enhancing daily tasks and overall efficiency.
  • Users commend the scalability of IBM Db2, ensuring excellent performance even with large datasets and enterprise workloads.
  • Users value the high availability of IBM Db2, ensuring seamless access to data even during outages.
Cons
  • Users express concern over feature limitations in IBM Db2, desiring quicker updates and improved management tools.
  • Users find IBM Db2's setup complex, facing high costs and limited documentation that complicate the user experience.
  • Users often find the complex setup of IBM Db2 challenging, requiring significant time and effort to manage effectively.
  • Users find the difficult setup of IBM Db2 challenging, often leading to frustration during initial configuration and administration.
  • Users feel that the expertise required for IBM Db2 makes it harder to find skilled specialists and implement new features.

What Are Recent G2 Reviews of IBM Db2?

What Are G2 Users Discussing About IBM Db2?

Flexter

Flexter is a distributed and secure big data solution for converting XML to text, Hadoop, or a database. It provides rapid conversion of complex XML data locked away in industry data standards and other proprietary XML formats.

Average Rating: 4.6/5.0

Total Reviews: 10

How Do G2 Users Rate Flexter?

  • Ease of Use: 8.9/10 (Category avg: 8.3/10)
  • Quality of Support: 8.3/10 (Category avg: 8.2/10)

Who Is the Company Behind Flexter?

Who Uses This Product?

  • Company Size: 50% Medium, 30% Large

What Are Recent G2 Reviews of Flexter?

Progress MarkLogic

Progress MarkLogic is an enterprise-grade multi-model data management platform that unlocks value from complex data. It works with the full breadth of a company's information and makes it easily discoverable and ready to power high-value applications, decision intelligence and trustworthy AI. Organizations leverage integrated capabilities to integrate, harmonize, search and visualize multi-model data to build a connected data ecosystem as the secure and scalable foundation for the AI era.

Average Rating: 4.3/5.0

Total Reviews: 65

How Do G2 Users Rate Progress MarkLogic?

  • Ease of Use: 8.1/10 (Category avg: 8.3/10)
  • Quality of Support: 8.2/10 (Category avg: 8.2/10)

Who Is the Company Behind Progress MarkLogic?

  • Seller: Progress Software
  • Company Website:
  • Year Founded: 1981
  • HQ Location: Burlington, MA.
  • Twitter: @ProgressSW
    48,773 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    4,242 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 53% Large, 24% Small

What Are Recent G2 Reviews of Progress MarkLogic?

What Are G2 Users Discussing About Progress MarkLogic?

Qizx

The Qualcomm Qizx software is a NoSQL, document-oriented, native XML database that stores, retrieves, and manipulates XML files, documents, and semi-structured data. Qizx is enterprise-ready and is well-suited for high volume, high throughput, workflow environments and text intensive projects where documents need to be quickly loaded and indexed for searching.

Average Rating: 3.8/5.0

Total Reviews: 12

How Do G2 Users Rate Qizx?

  • Ease of Use: 8.3/10 (Category avg: 8.3/10)
  • Quality of Support: 8.3/10 (Category avg: 8.2/10)

Who Is the Company Behind Qizx?

  • Seller: Qualcomm
  • Year Founded: 1985
  • HQ Location: San Diego, CA
  • Twitter: @Qualcomm
    441,209 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    58,165 employees on LinkedIn®
  • Ownership: NASDAQ:QCOM

Who Uses This Product?

  • Company Size: 46% Small, 38% Medium

What Are Recent G2 Reviews of Qizx?

XMLSpy

Altova XMLSpy is the world’s best-selling JSON and XML editor for modeling, editing, transforming, and debugging related technologies. It gives developers the tools they need to build the most sophisticated applications with its graphical schema designer, code generation, file converters, debuggers, and profilers for working with XSD, JSON Schema, XSLT, XQuery, XBRL, SOAP, and more.

Average Rating: 4.3/5.0

Total Reviews: 26

How Do G2 Users Rate XMLSpy?

  • Ease of Use: 8.8/10 (Category avg: 8.3/10)
  • Quality of Support: 8.3/10 (Category avg: 8.2/10)

Who Is the Company Behind XMLSpy?

  • Seller: Altova
  • Year Founded: 1992
  • HQ Location: Beverly, MA
  • Twitter: @altova
    569 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    42 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Computer Software
  • Company Size: 69% Large, 27% Small

What Are Recent G2 Reviews of XMLSpy?

Apache Xerces

Xerces is Apache's collection of software libraries for parsing, validating, serializing and manipulating XML. The library implements a number of standard APIs for XML parsing, including DOM, SAX and SAX2.

Average Rating: 4.1/5.0

Total Reviews: 12

How Do G2 Users Rate Apache Xerces?

  • Ease of Use: 8.9/10 (Category avg: 8.3/10)
  • Quality of Support: 8.1/10 (Category avg: 8.2/10)

Who Is the Company Behind Apache Xerces?

Who Uses This Product?

  • Company Size: 58% Large, 33% Small

What Are Recent G2 Reviews of Apache Xerces?

What Are G2 Users Discussing About Apache Xerces?

Apache Santuario

The Apache Santuario project is aimed at providing implementation of the primary security standards for XML.

Average Rating: 4.4/5.0

Total Reviews: 13

How Do G2 Users Rate Apache Santuario?

  • Ease of Use: 8.0/10 (Category avg: 8.3/10)
  • Quality of Support: 8.0/10 (Category avg: 8.2/10)

Who Is the Company Behind Apache Santuario?

Who Uses This Product?

  • Company Size: 54% Medium, 31% Small

What Are Recent G2 Reviews of Apache Santuario?

What Are G2 Users Discussing About Apache Santuario?

Apache Axiom

The Apache Axiom library provides an XML Infoset compliant object model implementation which supports on-demand building of the object tree. It supports a novel "pull-through" model which allows one to turn off the tree building and directly access the underlying pull event stream using the StAX API.

Average Rating: 4.3/5.0

Total Reviews: 22

How Do G2 Users Rate Apache Axiom?

  • Ease of Use: 8.4/10 (Category avg: 8.3/10)
  • Quality of Support: 7.4/10 (Category avg: 8.2/10)

Who Is the Company Behind Apache Axiom?

Who Uses This Product?

  • Top Industries: Computer Software, Information Technology and Services
  • Company Size: 45% Small, 32% Large

What Are Recent G2 Reviews of Apache Axiom?

What Are G2 Users Discussing About Apache Axiom?

Apache Xalan

The Apache Xalan Project develops and maintains libraries and programs that transform XML documents using XSLT standard stylesheets.

Average Rating: 4.2/5.0

Total Reviews: 15

How Do G2 Users Rate Apache Xalan?

  • Ease of Use: 8.3/10 (Category avg: 8.3/10)
  • Quality of Support: 8.0/10 (Category avg: 8.2/10)

Who Is the Company Behind Apache Xalan?

Who Uses This Product?

  • Top Industries: Telecommunications
  • Company Size: 38% Small, 31% Large

What Are Recent G2 Reviews of Apache Xalan?

What Are G2 Users Discussing About Apache Xalan?

Altova MissionKit

MissionKit is a software development suite of enterprise-class XML, JSON, SQL, and UML tools for information architects and application developers. MissionKit includes Altova XMLSpy, MapForce, StyleVision, and other market-leading products for building today’s real-world software solutions.

Average Rating: 4.2/5.0

Total Reviews: 10

How Do G2 Users Rate Altova MissionKit?

  • Ease of Use: 7.6/10 (Category avg: 8.3/10)
  • Quality of Support: 8.3/10 (Category avg: 8.2/10)

Who Is the Company Behind Altova MissionKit?

  • Seller: Altova
  • Year Founded: 1992
  • HQ Location: Beverly, MA
  • Twitter: @altova
    569 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    42 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 70% Small, 20% Large

What Are Recent G2 Reviews of Altova MissionKit?

What Are G2 Users Discussing About Altova MissionKit?

Apache Anakia

Apache Anakia is an XML transformation tool which uses JDOM and Velocity to transform XML documents into the format of your choice.

Average Rating: 2.3/5.0

Total Reviews: 3

Who Is the Company Behind Apache Anakia?

Who Uses This Product?

  • Company Size: 67% Large, 33% Medium

What Are G2 Users Discussing About Apache Anakia?

BaseX

BaseX is a light-weight, high-performance and scalable XML Database engine and XPath/XQuery 3.1 Processor, which includes full support for the W3C Update and Full Text extensions. An interactive and user-friendly GUI frontend gives you great insight into your XML documents.

Average Rating: 3.7/5.0

Total Reviews: 3

How Do G2 Users Rate BaseX?

  • Ease of Use: 8.3/10 (Category avg: 8.3/10)
  • Quality of Support: 7.8/10 (Category avg: 8.2/10)

Who Is the Company Behind BaseX?

  • Seller: BaseX
  • HQ Location: Konstanz, Germany
  • Twitter: @BaseXdb
    401 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    1 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 67% Medium, 33% Small

What Are Recent G2 Reviews of BaseX?

Apache Scout

Apache Scout is an implementation of the JSR 93 (JAXR). It provides an implementation to access UDDI registries (particularly Apache jUDDI) in a standard way.

Average Rating: 3.3/5.0

Total Reviews: 2

How Do G2 Users Rate Apache Scout?

  • Ease of Use: 8.3/10 (Category avg: 8.3/10)
  • Quality of Support: 8.3/10 (Category avg: 8.2/10)

Who Is the Company Behind Apache Scout?

Who Uses This Product?

  • Company Size: 50% Large, 50% Medium

What Are Recent G2 Reviews of Apache Scout?

What Are G2 Users Discussing About Apache Scout?

HREFLang Builder

HREFLang Builder is an enterprise-grade solution to map, manage, monitor and store the XML site maps representing your alternate language pages

Average Rating: 4.5/5.0

Total Reviews: 2

Who Is the Company Behind HREFLang Builder?

Who Uses This Product?

  • Company Size: 50% Large, 50% Small

What Are Recent G2 Reviews of HREFLang Builder?

What Are G2 Users Discussing About HREFLang Builder?

Shalaka Joshi
SJ
Researched and written by Shalaka Joshi
Updated October 3, 2024