The ISTC maintains links with technical communication bodies in many parts of the world.
It is a founder member of TCeurope, an umbrella organisation for national associations in Europe. TCeurope was set up in 2001 to build relationships with partner associations and work together to raise the profile of technical communication in Europe.
TCeurope organises projects in which all its members can participate and hosts an annual colloquium in a European city which is free to attend.
Worldwide, the ISTC has informal links with a number of technical communication organisations.