HiSoft Systems is a software company based in the UK, creators of a range of programming tools for microcomputers in 1980s and 1990s. Their first products were Pascal and Assembler implementations for the NASCOM 1 and 2 kit-based computers, followed by Pascal and C for ZX Spectrum computers, as well as a BASIC compiler for this platform and a C compiler for CP/M. While compilers for the ZX Spectrum were typical products for this platform, with integrated editor, compiler and runtime environment fitting in RAM together with program's source, the C compiler for CP/M was typical for this operating system, batch operated, with separate compilation and linking stages.
Their most well-known products were the Devpac assembler IDE environments (earlier known as GenST and GenAm for the Atari ST and Amiga, respectively). The Devpac IDE was a full editor/assembler/debugger environment written entirely in 68k assembler and was a favourite tool among programmers on the Atari GEM platform.
HiSoft also sold HiSoft BASIC, HiSoft C Interpreter for the Atari ST, Aztec C, Personal Pascal and FTL Modula-2.
The business was created in 1980 and was based in Dunstable, Bedfordshire before relocating to the village of Greenfield in the same county.
David Link, the founder and owner, ran a café () in the village of Emsworth for a year until July 2007 and a restaurant/bar/guest house() in Shanklin, Isle of Wight, from 2010 until January 2015.