Sébastien de Jong, Partner at Blue Opal Capital is an active investor based in United States. This profile covers what Sébastien de Jong backs, at which stage, and how founders can reach out in 2026.
Partner at Blue Opal Capital; describes himself as an investor and entrepreneur.
Sébastien de Jong typically invests at Seed and Series A.
- Investor type
- Investment Partner
- Stages
- SeedSeries A
- Location
- United States
- Typical check
- $625K
How to reach Sébastien de Jong
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About this profile
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Cite this page
Round Funded. "Sébastien de Jong." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/sebastien-de-jong
Frequently Asked Questions
Who is Sébastien de Jong?
Sébastien de Jong, Partner at Blue Opal Capital is an active investor based in United States. Sébastien de Jong typically invests at Seed and Series A.
What stage does Sébastien de Jong invest at?
Sébastien de Jong typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Sébastien de Jong's typical check size?
Sébastien de Jong typically writes checks around $625K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.