A prominent software entrepreneur has said he remains undecided on whether to run in the presidential election, keeping South Koreans guessing about his political aspirations.

Ahn Cheol-soo has been eyed as a potential candidate for the December presidential election since his stunning debut in the political community during last year's Seoul mayoral election.

The founder of AhnLab, South Korea's biggest anti-virus software firm, also donated half of his stake in Ahnlab to charity, underpinning speculation about his presidential aspirations.

Still, the political neophyte has yet to give a clear-cut answer on whether he will seek the country's top political job.

When asked whether he has decided to run in the election, Ahn said "no." He made the comment during a visit to a Seoul hospital late Thursday. (Yonhap)