CONCORDION (for Java) was originally developed by David Peterson. The IDEA was sparked by conversations with testers and developers, in particular Nat Pryce and Steve Freeman while working at Easynet (BSkyB) in 2006.

In 2013, Nigel Charman took over as project lead, having developed the Concordion EXTENSIONS mechanism.

Version 2.0 of Concordion was released in 2016 by a team of contributors.

Concordion.NET was originally ported from the Java version by Jeffrey Cameron.

In 2013, ShaKaRee took over as project lead, and updated the code base. In 2016, ShaKaRee brought the code to parity with the Java version by cross-compiling it using IKVM.NET and performance TUNING it to be FASTER than the previous natively compiled version.

Concordion has been ported and further extended by several other developers.

Concordion (for Java) was originally developed by David Peterson. The idea was sparked by conversations with testers and developers, in particular Nat Pryce and Steve Freeman while working at Easynet (BSkyB) in 2006.

In 2013, Nigel Charman took over as project lead, having developed the Concordion extensions mechanism.

Version 2.0 of Concordion was released in 2016 by a team of contributors.

Concordion.NET was originally ported from the Java version by Jeffrey Cameron.

In 2013, ShaKaRee took over as project lead, and updated the code base. In 2016, ShaKaRee brought the code to parity with the Java version by cross-compiling it using IKVM.NET and performance tuning it to be faster than the previous natively compiled version.

Concordion has been ported and further extended by several other developers.