 In 2003, there was a controversy over ALZip's own compression file format ALZ, when a developer of another Korean compression utility, "빵집" insisted that ALZip users were forced to use the ALZip archiver when decompressing ALZ files.He also insisted that ESTsoft does not offer decompression libraries, and third-party archiver developers have used reverse engineering to develop their own algorithms.The current version of "빵집" supports ALZ format.