Gustaf Alstromer
Group Partner @ Y Combinator
San Francisco, United States
Gustaf Alstromer is a pre-seed investor at Y Combinator in San Francisco focused on Artificial Intelligence and Software. Gustaf Alstromer is based out of San Francisco, California and is the General Partner of Y Combinator. Gustaf previously worked at Airbnb as a Product Manager of Growth. Gustaf Alstromer attended the Hyper Island.
- Total investments:
- 183
- Last investment:
- Lead investor:
- 63%
Last updated:
For AI agents: llms.txt
Industries Gustaf Alstromer invests in
Stages Gustaf Alstromer invests in
Countries Gustaf Alstromer invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $500k–$8.6M
- Pre-Seed
- $500k–$500k
- Series A
- $13M–$43M
Investment Focus
Industry
- Artificial Intelligence 88 (48%)
- Software 62 (34%)
- Information Technology 35 (19%)
- B2B 20 (11%)
- SaaS 20 (11%)
Stage
- Pre-Seed 127 (69%)
- Seed 37 (20%)
- Series A 12 (7%)
- Series B 2 (1%)
- Funding Round 1 (1%)
Country
- United States 123 (67%)
- Canada 4 (2%)
- Germany 4 (2%)
- Singapore 3 (2%)
- United Kingdom 3 (2%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Insurf develops AI-based tools that support coverage decisions in health insurance. The company offers Inveto, a denial-management workbench that prepares source-cited prior authorization requests and appeal packets, coordinates physician attestation, and tracks payer responses and outcomes. Inveto structures a six-step workflow from intake through drafting, physician review, staff-controlled submission, follow-up, and outcome reporting. Insurf also offers Surely, a cost engine that models the potential twelve-month cost of health plans using premiums, deductibles, drug tiers, networks, and out-of-pocket limits. Surely accepts household and care needs through a plain-language intake and translates them into structured plan assumptions. Insurf focuses on practices, brokers, employers, and diligence teams evaluating coverage and plan options. | $500K / Pre-Seed / Sep 10, 2026 | ||
| Billow AI is an AI-powered platform focused on automating accounts receivable (A/R) collections, primarily for law firms and professional services. | $500K / Pre-Seed / Sep 10, 2026 | ||
| Rapidfolio provides an AI workflow platform for banks, fintechs, lenders, payment processors, and other regulated businesses. The platform converts documented procedures into AI-agent workflows that can be tested, deployed through APIs or operational triggers, and reviewed through audit records. It supports processes such as KYC and KYB reviews, sanctions screening, loan underwriting, fraud investigations, disputes, reconciliation, and account reviews. Rapidfolio integrates with third-party systems and allows human approval steps within automated procedures. Its services include workflow execution, data connections, automated browsing, documentation, and technical support. | $500K / Pre-Seed / Sep 10, 2026 | ||
| Pango AI is an AI-driven e-commerce logistics platform designed to automate back-office shipping, tracking, returns, and refund operations for online merchants. The company's platform ingests a merchant's shipping policies, carrier contracts, and order management systems during onboarding, then autonomously executes daily logistics decisions, including checkout carrier selection, shipment booking, proactive delay notifications, returns processing, and automated refund issuance, governed by each merchant's specific business rules. By consolidating the functions of multiple disconnected point solutions into a single system, the platform reduces manual workflows, lowers support ticket volume, and improves post-purchase conversion rates, enabling e-commerce businesses to operate their logistics back-office with minimal human intervention. Founded in Stockholm in 2025, the company serves paying enterprise customers across the Nordics, including brands with combined revenues exceeding $135 million, and is expanding into the US mid-market segment of merchants who have outgrown basic e-commerce plugins but cannot afford enterprise-grade logistics implementations. Traditional e-commerce logistics often operate in fragmented silos, leading to inflated operational costs and manual support tickets. Pango solves this by seamlessly integrating with over 100 global carriers, warehouse management systems, ERPs, and customer support platforms. This allows operations and customer experience teams to put their shipping and returns on autopilot without needing advanced programming expertise. Pango provides brands with customizable control over the post-purchase flow through three core functionalities. First, the delivery management system offers automated carrier selection and predictive delivery dates to optimize shipping checkouts. Second, the platform provides proactive delay alerts and branded tracking pages to significantly reduce Where Is My Order support inquiries. Finally, Pango features a powerful return management software with a drag-and-drop workflow builder. This allows brands to enforce condition-based return policies, facilitate international reverse logistics, and effortlessly convert refunds into instant product exchanges. By acting as a digital logistics employee, Pango empowers e-commerce brands to optimize checkout conversion rates, reduce fulfillment expenses, and maintain a consistent, exceptional customer experience that drives retention. | $500K / Pre-Seed / Sep 10, 2026 | ||
| Conifer provides AI routing gateway that optimizes token spend by intelligently routing queries across local hardware and cloud models. | $500K / Pre-Seed / Sep 10, 2026 | ||
| Torus provides AI engineering software that automates workflows and validates technical documents using engineering data analysis. | $500K / Pre-Seed / Sep 03, 2026 | ||
| 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 | ||
| AI accounting for enterprise finance teams | $3.4M / Seed / Jul 08, 2026 | ||
| 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 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 | ||
| See all 183 investments → | |||
Co-Investors
About Y Combinator
Y Combinator invests a standard amount of capital in exchange for equity and through uncapped safe agreements. Participants engage in a three-month intensive cycle that focuses on product development and preparations for fundraising. The firm offers access to a private networking platform for knowledge sharing and hosts events featuring speakers from various sectors. This program culminates in a presentation event where founders showcase their businesses to a curated group of investors.
Y Combinator Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Boris Jabes
Visiting Partner
|
|||
Luther Lowe
Head of Public Policy
|
|||
Max Kolysh
Visiting Partner
|
|||
Brad Flora
Group Partner
|
|||
Calvin French-Owen
Visiting Group Partner
|
Access 48,091 investors
822 industries, 177 countries. Updated daily. Emails and phones included.
Browse database — It's Free!
Find investors for your startup
Search 48,091 investors by industry and country. Emails and phones included.
Similar Investors
Similar industry
Similar stage
Similar country
Featured in Investor Lists
Recommended lists
FAQ
What does Gustaf Alstromer invest in?
Gustaf Alstromer invests primarily in Artificial Intelligence, Software and Information Technology startups, most often at Pre-Seed and Seed stage. Most of the 183 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What round sizes does Gustaf Alstromer invest in?
Gustaf Alstromer typically joins rounds of $500k–$8.6M at Seed, $500k–$500k at Pre-Seed and $13M–$43M at Series A. These are whole funding-round sizes, not Gustaf Alstromer's own check, which is rarely disclosed: the 10th–90th percentile of the confirmed public funding rounds Gustaf Alstromer took part in.
How do I contact Gustaf Alstromer?
Public channels for Gustaf Alstromer include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Gustaf Alstromer last invest?
The most recent investment recorded for Gustaf Alstromer closed in Sep 2026. Shizune tracks 183 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
Contact your first 100 investors today
Find who invests in your industry, stage, and country. Download investor list with emails in 5 minutes.
Find investors — It's Free!
Continue with Google
Continue with LinkedIn
