Igor Ryabenkiy is the founder of AltaIR Capital and is listed on the firm's team page with the title "Founder and Managing Partner". His own personal site states that he signed his first angel check in 1998, has "25+ years investing", and "founded AltaIR Capital in 2005 to support early stage companies across the US, Europe and Israel"; it also states that he founded AltaClub, a global investor community, and AltaLab, a program for founders, and that he oversees "400+ companies in portfolio" with "10+ unicorns". His Harbour Space Institute of Technology faculty page gives his prior career as co-founder and President of Unit Group in Vienna from 1993 to 2005 and Vice President at Elecs Group in Vienna from 1988 to 1993, and lists a Doctor of Business Administration awarded in 2005 by the Academy of National Economy and SBS Swiss Business School and an electrical engineering qualification from Moscow State Mining University between 1977 and 1982. Globes reported in April 2015 that he was raising $30 million for investment in Israeli high tech and quoted him saying he had by then been living in Israel for more than a year. SEC Form D filings by four issuers name him in their relatedPersonsList as a Director: Social Links, Inc. (filed 7 November 2025), UNest Holdings, Inc. (15 February 2022), Zero Cognitive Systems, Inc. (4 March 2022) and ENHATCH INC. (22 March 2018). Only the Social Links filing is recent enough to be treated as a currently held seat here; the other three are recorded in the career timeline with their filing dates instead.
Education
Doctor of Business Administration (2005), Academy of National Economy and SBS Swiss Business School (per his Harbour Space faculty page)
Electrical engineer (1977-1982), Moscow State Mining University (per his Harbour Space faculty page)
Previous Experience
Co-founder and President, Unit Group, Vienna, Austria (1993-2005, per his Harbour Space faculty page)
Vice President, Elecs Group, Vienna, Austria (1988-1993, per his Harbour Space faculty page)
Notable Investments
Social Links, Inc.UNest Holdings, Inc.Zero Cognitive Systems, Inc.Enhatch Inc.
Board Seats
Social Links, Inc. - Director
Career Timeline
1998
Signs his first angel check, per his personal site.
2005
Founds AltaIR Capital, per his personal site: "founded AltaIR Capital in 2005 to support early stage companies across the US, Europe and Israel".
2015
Globes reports him raising $30 million for investment in Israeli high tech, and quotes him saying of Israel "I've already been living here for more than a year".
2015
Founds AltaClub, described on his personal site as a global investor community.
2018
Named as a Director of ENHATCH INC. in that issuer's Form D relatedPersonsList, filed 22 March 2018. This is the filing date, not confirmation of a seat held today.
2022
Named as a Director of UNest Holdings, Inc. in that issuer's Form D relatedPersonsList, filed 15 February 2022. Filing date only, not confirmation of a seat held today.
2022
Named as a Director of Zero Cognitive Systems, Inc. in that issuer's Form D relatedPersonsList, filed 4 March 2022. Filing date only, not confirmation of a seat held today.
2025
Named as a Director of Social Links, Inc. in that issuer's Form D relatedPersonsList, filed 7 November 2025.