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 (44% of deals). Average disclosed round size is $15.9M (across 83 rounds with reported amounts).
Portfolio
70
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
87 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 |
 Solda.AI | Seed | — | Apr 2025 |
 Turing | Series E | $111M | Mar 2025 |
 Final Round | Seed | $6.9M | Jan 2025 |
 Turing | Unknown | $111M | Jan 2025 |
 Turing | Series E | $111M | Jan 2025 |
| YYung Sidekick | Pre-Seed | $825K | Oct 2024 |
 Riverlane | Series C | $75M | Aug 2024 |
 Clerk Chat | Seed | $7M | Jan 2024 |
| FFuseBase | Seed | $700K | 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 |
 Unifimoney | Seed | $10M | Apr 2022 |
 Zero | Series A | $12M | Mar 2022 |
 Sunsama | Seed | $2.4M | Jan 2022 |
| Turing | Series D | $87M | Dec 2021 |
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Top Co-Investors
Y Combinator16 shared
Foundation Capital9 shared
Plug and Play Tech Center8 shared
WestBridge Capital8 shared
Amino Capital7 shared
Gaingels6 shared
Yellow Rocks!6 shared
Smart Partnership Capital6 shared
MVP Ventures5 shared
Group 115 shared
500 Global5 shared
Mento VC5 shared
Brainstorm Ventures4 shared
UpHonest Capital4 shared
Target Global4 shared
AltaIR4 shared
TMT Investments4 shared
Tal Ventures4 shared
I2BF Global Ventures4 shared
StepStone Group3 shared
Last updated: 7 October 2026