AltaIR Capital is an international early-stage venture investment company founded by Igor Ryabenkiy in 2005. The firm backs startups with disruptive ideas across the US, Israel, and Europe, with over 350 portfolio companies and 10+ unicorns including Miro, Deel, and Turing.
Their most common stage is seed (48% of deals). Average disclosed round size is $17.5M (across 61 rounds with reported amounts).
Portfolio
57
Fund Size
$600M
Top Stage
Seed
Last 12 Mo
4
Team
IR
Igor Ryabenkiy
Managing Partner
AA
Alfred Augustin
Partner
DF
Dmitry Firskin
Partner
MZ
Mike Zakharov
Investment Director
AS
Artem Shvetz
Senior Associate
KB
Konstantin B.
Investment Professional
DC
Daryl Chan
SEA Private Equity
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
64 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Acceler8 | Unknown | $6M | Jun 2026 |
 NachoNacho | Seed | $3M | Mar 2026 |
| PPlurio | Seed | $3.5M | Mar 2026 |
| IiPNOTE | Seed | — | Oct 2025 |
| SSolda.AI | Seed | — | Apr 2025 |
 Turing | Series E | $111M | Mar 2025 |
 Final Round | Seed | $6.9M | Jan 2025 |
 Turing | Unknown | $111M | Jan 2025 |
| TTuring | Series E | $111M | Jan 2025 |
| YYung Sidekick | Pre-Seed | $825K | Oct 2024 |
 Riverlane | Series C | $75M | Aug 2024 |
 Clerk Chat | Seed | $7M | Jan 2024 |
 Mesh | Series A | $22M | Sep 2023 |
 EMMA | Seed | $6M | Mar 2023 |
 Fibery | Seed | $5.2M | Jan 2023 |
| Fibery | Series A | $5.2M | Jan 2023 |
| Riverlane | Series B | — | Jan 2023 |
 Xscape Photonics | Seed | $10M | Dec 2022 |
| TTrash Warrior | Pre-Seed | $8M | Oct 2022 |
 Respond.io | Series A | $7M | Sep 2022 |
 Zero | Series A | $12M | Mar 2022 |
 Sunsama | Seed | $2.4M | Jan 2022 |
| Turing | Series D | $87M | Dec 2021 |
 Karma | Series A | $25M | Oct 2021 |
 Performetry | Unknown | $1.2M | Sep 2021 |
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Top Co-Investors
Y Combinator8 shared
WestBridge Capital5 shared
Amino Capital5 shared
MVP Ventures4 shared
Gaingels4 shared
Foundation Capital4 shared
Group 114 shared
Target Global4 shared
Mento VC4 shared
TMT Investments4 shared
Sozo Ventures3 shared
UpHonest Capital3 shared
SV Angel3 shared
500 Global3 shared
NFX3 shared
Florida Funders3 shared
S16VC3 shared
Plug and Play Tech Center2 shared
Initialized Capital2 shared
Zeev Ventures2 shared
Last updated: 8 September 2026