A command line tool for combining TIFF images into one is TIFF CombineX. This program also has a desktop version with GUI, and the features are the same for both editions. X version allows to combine TIFF via command line into TIFF or PDF result file. The program works with any number of TIFF source files and performs adjustable files merging with specific formatting.
Don't think that in command line mode the program is difficult to work with. All you need is to send a command to program's script on a web server, and then receive your files processed properly. It is a server application that works for multiple users, thereby you are purchasing one license for all users. Working in combine TIFF command line mode, the process is completely silent - no GUI, no progress bars or other popup windows. Everything is done on a server side, sending you only a result. TIFF CombineX can merge different graphic files together, either to TIFF or to PDF format. In TIFF mode it offers a lot of useful settings:
Adding header and footer
Orientation and paper settings
Each of these parameters is set in a command that you will send to a program script. Typically you need to specify source files' location, address for saving combined copy, target format and formatting options. The last one can be skipped, if you do not need to make any changes in future copy style.
One of the main advantages of TIFF SplitterX is its flexibility. This tool can work as a standalone utility or become a part of existing application with the help of ActiveX. You can insert TIFF combining feature into any web service or create a graphic interface for this program. Test the script for free, get it here!