Apps similar to Datagaps ETL Validator include QuerySurge. It's paid, but Scriptella ETL is free. Other options are Zynk. In total there are three apps like Datagaps ETL Validator for Windows, Linux and Mac.
QuerySurge is an enterprise-grade data quality platform that continuously automates the validation of data across your entire ecosystem?-?from data warehouses and big data lakes to BI reports and enterprise applications.
United States
Zynk is an Integration and Business Automation platform which is installed on your Windows server and allows you to create custom workflows to automate Data Integration tasks, Create Dashboards, Automate Reporting, PDF Generation and much more with little or no coding required.
United Kingdom
Scriptella is an open source ETL (Extract-Transform-Load) and script execution tool written in Java.
