Darby Sieben
Angel investor in Calgary
Calgary, Alberta
Darby Sieben, Angel investor in Calgary is an active investor based in Calgary, Alberta. This profile covers what Darby Sieben backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- SaaS & EnterpriseArtificial IntelligenceMarketplaceMedia & ContentInsurTechFood & BeverageAgTech & AgricultureGaming & Entertainment
- Location
- Calgary, Alberta
- Typical check
- $150K
- Past investments
- 13
Notable investments
MyTimeDarby Sieben Limited PartnershipsSky Motion ResearchCommerx CorporationPlatform Calgary
UnbounceJUICE MobileYellow Pages Group CanadaWalnut InsuranceCoupgonUnited Farmers of Alberta Co-operative LimitedHow to reach Darby Sieben
Angels and operators like Darby Sieben reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Darby Sieben." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/darby-sieben
Frequently Asked Questions
What does Darby Sieben invest in?
Darby Sieben invests in SaaS & Enterprise, Artificial Intelligence, Marketplace and Media & Content, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Darby Sieben invest at?
Darby Sieben typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Darby Sieben's typical check size?
Darby Sieben typically writes checks around $150K. 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.