Sebastian Siemiatkowski
Angel investor in Stockholm
Stockholm, Stockholm County
Sebastian Siemiatkowski, Angel investor in Stockholm is an active investor based in Stockholm, Stockholm County. This profile covers what Sebastian Siemiatkowski backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelInvestment Partner
- Stages
- Seed
- Invests in
- Developer Tools & Data
- Location
- Stockholm, Stockholm County
- Typical check
- $250K
- Past investments
- 8
Notable investments
Nylas
Prion
Scrive
Depop
Omio
Klarna
Steven
BudbeeHow to reach Sebastian Siemiatkowski
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Frequently Asked Questions
What does Sebastian Siemiatkowski invest in?
Sebastian Siemiatkowski invests in Developer Tools & Data, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Sebastian Siemiatkowski invest at?
Sebastian Siemiatkowski typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is Sebastian Siemiatkowski's typical check size?
Sebastian Siemiatkowski typically writes checks around $250K. Use it as a signal for whether your raise fits their stage.
How do I contact Sebastian Siemiatkowski?
Unlock Sebastian Siemiatkowski's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.