# Top Free Machine Learning Data Catalog Software ## How Many Machine Learning Data Catalog Software Products Does G2 Track? **Total Products under this Category:** 89 ### Category Stats (Jul 2026) - **Average Rating:** 4.36/5 (↓0.01 vs Jun 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** erwin Data Modeler (+0.14%) - Among all products in this category, erwin Data Modeler recorded the largest rating increase compared to last month _Last updated: July 23, 2026_ ## How Does G2 Rank Machine Learning Data Catalog Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 1,800+ Authentic Reviews - 89+ 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. [ AWS Glue ](https://www.g2.com/products/aws-glue/reviews) By [Amazon Web Services (AWS)](https://www.g2.com/sellers/amazon-web-services-aws-3e93cc28-2e9b-4961-b258-c6ce0feec7dd) [ 4.3/5(202) ](https://www.g2.com/products/aws-glue/reviews) What do users say? Users consistently praise AWS Glue for its ease of use and seamless integration with other AWS services, making data management and ETL processes straightforward. The serverless architecture and autom Pros and Cons [ Ease of Use (6) ](https://www.g2.com/products/aws-glue/reviews?qs=pros-and-cons)[ Slow Performance (3) ](https://www.g2.com/products/aws-glue/reviews?qs=pros-and-cons) [ Alation ](https://www.g2.com/products/alation/reviews) By [Alation](https://www.g2.com/sellers/alation) [ 4.4/5(91) ](https://www.g2.com/products/alation/reviews) What do users say? Users consistently praise Alation for its user-friendly interface and robust search capabilities, which simplify data discovery and enhance collaboration among teams. The platform effectively connects Pros and Cons [ Ease of Use (16) ](https://www.g2.com/products/alation/reviews?qs=pros-and-cons)[ Slow Performance (8) ](https://www.g2.com/products/alation/reviews?qs=pros-and-cons) [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. [ Learn More ](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) [ Select Star ](https://www.g2.com/products/select-star/reviews) By [Select Star](https://www.g2.com/sellers/select-star) [ 4.5/5(55) ](https://www.g2.com/products/select-star/reviews) What do users say? Users consistently praise the intuitive interface and powerful search functionality of Select Star, which simplifies data discovery and enhances onboarding processes. The tool's ability to provide cle Pros and Cons [ Ease of Use (10) ](https://www.g2.com/products/select-star/reviews?qs=pros-and-cons)[ Limited Functionality (2) ](https://www.g2.com/products/select-star/reviews?qs=pros-and-cons) [ Secoda ](https://www.g2.com/products/secoda/reviews) By [Secoda](https://www.g2.com/sellers/secoda) [ 4.5/5(55) ](https://www.g2.com/products/secoda/reviews) What do users say? Users consistently praise Secoda for its ease of use and robust customer support, which facilitate seamless data documentation and discovery. The platform's ability to centralize data assets and enhan Pros and Cons [ Data Lineage (7) ](https://www.g2.com/products/secoda/reviews?qs=pros-and-cons)[ Learning Difficulty (4) ](https://www.g2.com/products/secoda/reviews?qs=pros-and-cons) [ Coalesce Catalog (formerly... ](https://www.g2.com/products/castor-doc/reviews) By [Coalesce](https://www.g2.com/sellers/coalesce) [ 4.7/5(64) ](https://www.g2.com/products/castor-doc/reviews) What do users say? Users consistently praise the intuitive interface and powerful lineage features of the product, which simplify data discovery and documentation. Many find it invaluable for enhancing data governance a Pros and Cons [ Ease of Use (3) ](https://www.g2.com/products/castor-doc/reviews?qs=pros-and-cons)[ Connector Issues (1) ](https://www.g2.com/products/castor-doc/reviews?qs=pros-and-cons) [ IBM watsonx.data intelligence ](https://www.g2.com/products/ibm-watsonx-data-intelligence/reviews) By [IBM](https://www.g2.com/sellers/ibm) [ 4.2/5(29) ](https://www.g2.com/products/ibm-watsonx-data-intelligence/reviews) What do users say? Users consistently praise the ease of use and intuitive navigation of the software, highlighting its ability to quickly access and manage data assets. Many appreciate how it simplifies data classifica Pros and Cons [ Automation (3) ](https://www.g2.com/products/ibm-watsonx-data-intelligence/reviews?qs=pros-and-cons)[ Complex Implementation (3) ](https://www.g2.com/products/ibm-watsonx-data-intelligence/reviews?qs=pros-and-cons) [ Sifflet ](https://www.g2.com/products/sifflet/reviews) By [Sifflet](https://www.g2.com/sellers/sifflet) [ 4.3/5(55) ](https://www.g2.com/products/sifflet/reviews) What do users say? Users consistently praise Sifflet for its ease of use and effective anomaly detection, which helps teams quickly identify data issues and maintain quality. The platform's intuitive interface and seaml Pros and Cons [ Efficiency Improvement (37) ](https://www.g2.com/products/sifflet/reviews?qs=pros-and-cons)[ Limited Customization (17) ](https://www.g2.com/products/sifflet/reviews?qs=pros-and-cons) [ Coginiti ](https://www.g2.com/products/coginiti/reviews) By [Coginiti Corp](https://www.g2.com/sellers/coginiti-corp) [ 4.5/5(29) ](https://www.g2.com/products/coginiti/reviews) What do users say? Users consistently praise the ease of use and user-friendly interface of the software, which simplifies database querying and management. Many appreciate its ability to quickly run queries and spot er [ DataHub ](https://www.g2.com/products/datahub/reviews) By [DataHub](https://www.g2.com/sellers/datahub) [ 4.4/5(8) ](https://www.g2.com/products/datahub/reviews) Product Description DataHub is an event-driven AI and Data Context Platform designed to unify discovery, governance, and observability across an organization’s entire data estate. Unlike traditional data catalogs, DataHu Pros and Cons [ Ease of Use (3) ](https://www.g2.com/products/datahub/reviews?qs=pros-and-cons)[ Integration Issues (2) ](https://www.g2.com/products/datahub/reviews?qs=pros-and-cons) [ DataGalaxy ](https://www.g2.com/products/datagalaxy/reviews) By [DataGalaxy](https://www.g2.com/sellers/datagalaxy) [ 4.8/5(63) ](https://www.g2.com/products/datagalaxy/reviews) What do users say? Users consistently praise the product for its user-friendly interface and ease of use, which facilitate seamless data governance and collaboration across teams. The platform's ability to centralize da Pros and Cons [ Ease of Use (5) ](https://www.g2.com/products/datagalaxy/reviews?qs=pros-and-cons)[ User Interface Issues (3) ](https://www.g2.com/products/datagalaxy/reviews?qs=pros-and-cons) [ Denodo ](https://www.g2.com/products/denodo/reviews) By [Denodo](https://www.g2.com/sellers/denodo) [ 4.3/5(47) ](https://www.g2.com/products/denodo/reviews) What do users say? Users consistently praise Denodo for its ease of use and ability to connect to multiple data sources, making data management straightforward and efficient. The platform's capability to create a unifie Pros and Cons [ Functionality (3) ](https://www.g2.com/products/denodo/reviews?qs=pros-and-cons)[ Expensive (2) ](https://www.g2.com/products/denodo/reviews?qs=pros-and-cons) [ Validio ](https://www.g2.com/products/validio/reviews) By [Validio](https://www.g2.com/sellers/validio) [ 5/5(17) ](https://www.g2.com/products/validio/reviews) What do users say? Users consistently praise the ease of use and automated anomaly detection of Validio, highlighting how quickly it can be set up and how effectively it monitors data quality. Many appreciate the respon Pros and Cons [ Ease of Use (3) ](https://www.g2.com/products/validio/reviews?qs=pros-and-cons)[ Limited Customization (2) ](https://www.g2.com/products/validio/reviews?qs=pros-and-cons) [ Promethium ](https://www.g2.com/products/promethium/reviews) By [Promethium](https://www.g2.com/sellers/promethium) [ 4.2/5(13) ](https://www.g2.com/products/promethium/reviews) What do users say? Users consistently praise the product for its centralized data management and ease of implementation, which simplifies the process of handling multiple data sources. The integration of AI enhances ana Pros and Cons [ Insights (4) ](https://www.g2.com/products/promethium/reviews?qs=pros-and-cons)[ Complexity (1) ](https://www.g2.com/products/promethium/reviews?qs=pros-and-cons) [ Datameer ](https://www.g2.com/products/datameer/reviews) By [Datameer](https://www.g2.com/sellers/datameer) [ 4.2/5(24) ](https://www.g2.com/products/datameer/reviews) What do users say? Users consistently praise the ease of use and intuitive interface of Datameer, making it accessible for both technical and non-technical users. The platform's seamless integration with Snowflake allow [ ThinkData Works ](https://www.g2.com/products/thinkdata-works/reviews) By [ThinkData Works](https://www.g2.com/sellers/thinkdata-works) [ 4.6/5(14) ](https://www.g2.com/products/thinkdata-works/reviews) What do users say? Users consistently praise the user-friendly interface and data management capabilities of this software, highlighting its effectiveness in organizing and visualizing data. Many appreciate how it simpl [![G2 Advertising](/assets/my-g2-logo-41632af6f81a240a0a9886638f412b2ac9a29f4001534f8c83be89a58ef9d45d.svg "G2 Advertising")](https://sell.g2.com/case-studies/how-aisdr-uses-g2-ads-to-turn-g2-into-top-5-traffic-source) Sponsored G2 Advertising Get 2x conversion than Google Ads with G2 Advertising! G2 Advertising places your product in premium positions on high-traffic pages and on targeted competitor pages to reach buyers at key comparison moments. 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