# Gustaf Alstromer

> Gustaf Alstromer is a pre-seed investor at Y Combinator backing Artificial Intelligence. See 173 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Y Combinator](https://shizune.co/investors/profile/y-combinator)
- Location: San Francisco, United States
- Total investments: 173
- Last investment: Jul 2026
- Lead investor: 62%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/gustafalstromer
- X (Twitter): https://twitter.com/gustaf
- Facebook: https://www.facebook.com/gustaf.alstromer

Gustaf Alstromer is a partner at Y Combinator. Before joining Y Combinator he spent 4.5 years at Airbnb where he worked as a Product Lead on the Growth team, a team he helped start in 2012.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $500k–$8.6M |
| Pre-Seed | $500k–$500k |
| Series A | $13M–$43M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 33 | 19% |
| Software | 24 | 14% |
| B2B | 11 | 6% |
| SaaS | 11 | 6% |
| Health Care | 9 | 5% |

103 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Pre-Seed | 49 | 28% |
| Seed | 22 | 13% |
| Series A | 7 | 4% |
| Series B | 2 | 1% |
| Funding Round | 1 | 1% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 53 | 31% |
| Canada | 3 | 2% |
| Singapore | 2 | 1% |
| Spain | 1 | 1% |
| France | 1 | 1% |

10 countries tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Terminal | Terminal provides telematics data infrastructure for the commercial fleet industry. The platform connects software companies, insurers, fleet operators, and other businesses with vehicle data from multiple telematics providers through a unified integration layer. It manages data ingestion, provider integrations, consent workflows, and data deliveryto support fleet management, insurance, fuel services, and transportation applications. | $20M | Series A | Jul 29, 2026 |  |
| Finto | AI accounting for enterprise finance teams | $3.4M | Seed | Jul 08, 2026 |  |
| Stilta | Stilta offers AI software for patent practitioners to search prior art, draft filings, monitor competitors, and assess portfolio value. | $10.5M | Seed | May 19, 2026 |  |
| Vapi | Vapi is a platform that allows the integration of applications and services. It enables users to create, manage, and monitor APIs. It also supports developers in building solutions and facilitates collaboration between teams. Vapi serves industries such as technology, finance, healthcare, and logistics. | $50M | Series B | May 12, 2026 |  |
| AfterQuery | AfterQuery provides high-quality human-generated datasets which are further used to finetune AI systems. | $30M | Series A | Apr 09, 2026 |  |
| Cofia | Cofia builds AI software that learns user workflows, generates task automations, and executes repetitive work. | $500K | Pre-Seed | Mar 24, 2026 |  |
| Terminal Use | Terminal Use offers a platform to build, deploy, and manage AI agents with filesystem access, orchestration, and execution infrastructure. | $500K | Pre-Seed | Mar 24, 2026 |  |
| AutoSitu | AutoSitu builds Co-ordinated AI agents to provide expert-level guidance and catch issues for real estate development. | $500K | Pre-Seed | Mar 24, 2026 |  |
| Panta Insurance Services | Panta Insurance Services offers liability, property, worker's compensation, cyber and tech, and commercial auto insurance. |  | Seed | Mar 24, 2026 |  |
| Stilta | Stilta offers AI software for patent practitioners to search prior art, draft filings, monitor competitors, and assess portfolio value. | $500K | Pre-Seed | Mar 24, 2026 |  |

10 of 173 investments shown.

## Co-investors
- [Pioneer Fund](https://shizune.co/investors/profile/pioneer-fund) — VC Fund, 20 deals together
- [Rebel Fund](https://shizune.co/investors/profile/rebel-fund) — VC Fund, 13 deals together
- [Eight Capital](https://shizune.co/investors/profile/eight-capital) — VC Fund, 6 deals together
- [Four Cities Capital](https://shizune.co/investors/profile/fourcities-capital) — VC Fund, 6 deals together
- [Liquid 2 Ventures](https://shizune.co/investors/profile/liquid2-ventures) — VC Fund, 6 deals together
- [Unpopular Ventures](https://shizune.co/investors/profile/unpopular-ventures) — VC Fund, 6 deals together

## About Y Combinator

VC Fund · Mountain View, United States

Y Combinator is a startup accelerator that provides funding and mentorship to early-stage companies. It offers a program where startups receive guidance from experienced entrepreneurs and investors. The organization helps founders in their business models and develop their products. Y Combinator serves industries such as technology, healthcare, andfinance.

5 contacts available at Y Combinator.

| Name | Title | Profile |
| --- | --- | --- |
| Boris Jabes | Visiting Partner | https://shizune.co/investors/profile/boris-jabes |
| Luther Lowe | Head of Public Policy | https://shizune.co/investors/profile/luther-lowe |
| Max Kolysh | Visiting Partner | https://shizune.co/investors/profile/max-kolysh |
| Brad Flora | Group Partner | https://shizune.co/investors/profile/brad-flora |
| Calvin French-Owen | Visiting Group Partner | https://shizune.co/investors/profile/calvin-french-owen |

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## FAQ

### What does Gustaf Alstromer invest in?

Gustaf Alstromer invests primarily in Artificial Intelligence, Software and B2B startups, most often at Pre-Seed and Seed stage. Most of the 173 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Gustaf Alstromer's check size?

Gustaf Alstromer typically joins rounds of $500k–$8.6M at Seed, $500k–$500k at Pre-Seed and $13M–$43M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Gustaf Alstromer participates in.

### When did Gustaf Alstromer last invest?

The most recent investment recorded for Gustaf Alstromer closed in Jul 2026. Shizune tracks 173 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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