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StackHawk
Denver, US · Founded 2019 · Delaware corporation · 29 employees on LinkedIn · 9 known investors
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StackHawk provides an API security tool designed for software development teams to identify and fix security vulnerabilities in real-time as part of their development workflow. The platform targets developers and modern software teams seeking to integrate security checks into continuous integration and deployment practices.
Founders & leadership
StackHawk was founded in 2019 by Joni Klippert, Scott Gerlach, Bryce Ambraziunas, and Ryan Severns.
JK
Joni KlippertFounderHe has experience in DevOps and agile software development, and has worked on growing companies from early stage through acquisition.
SG
Scott GerlachFounderHe brings over 20 years of information security experience, including prior leadership positions at GoDaddy and SendGrid.
BA
Bryce AmbraziunasCo-founder · COOBryce Ambraziunas is an operations executive who previously served as COO of VictorOps, a monitoring and incident response platform acquired by Splunk, and as COO of Affinity VideoNet, which was acquired by GlowPoint. He also held senior operations roles at Raindance Communications and Global Crossing during the 1990s and 2000s.
Board
DH
GS
TV
Investors · 9
Alumni Ventureslisted by Alumni VenturesManchester · $100K – $10M
How we know: av.vc · Not right? Tell us
Costanoa Ventureslisted by Costanoa VenturesSan Francisco · $500K – $8M
How we know: Costanoa Ventures's portfolio page · a partner's Signal profile · stackhawk.com · open dataset · 5k.vc investor directory · Not right? Tell us
Flybridge Capital Partnerslisted by Flybridge Capital PartnersNew York · $250K – $10M
How we know: Flybridge Capital Partners's portfolio page · stackhawk.com · the VCSheet dataset · Not right? Tell us
Foundrylisted by FoundryBoulder · $250K – $15M
How we know: Foundry's portfolio page · stackhawk.com · open dataset · 5k.vc investor directory · Not right? Tell us
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Matchstick Ventureslisted by Matchstick VenturesBoulder · $500K – $1.5M
How we know: Matchstick Ventures's portfolio page · offering press articles · stackhawk.com · Not right? Tell us
Sapphire Ventureslisted by Sapphire VenturesAustin · $5M – $20M
How we know: Sapphire Ventures's portfolio page · a partner's Signal profile · stackhawk.com · open dataset · 5k.vc investor directory · Not right? Tell us
Skyview VenturesreportedNashville
How we know: funding news · Not right? Tell us
Taronga Groupreported
How we know: funding news · Not right? Tell us
Reported raises · per SEC filings
Form D private placements$50.2M disclosed across 11 rounds · 2019–2025
▶$14.8MraisedAug 2025 · 24 investors · OtherRule 506(b)
▶$14.8MraisedAug 2025 · 24 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Todd VernonDirector, Promoter
- Joni KlippertExecutive Officer, Director, Promoter
- Greg SandsDirector
- Scott GerlachExecutive Officer, Promoter
- David HartwigDirector
- Bryce AmbraziunasExecutive Officer
- Offering amount
- $15M
- Amount sold
- $14.8M
- First sale
- May 2025
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$4.4KraisedAug 2025 · 1 investors · OtherRule 506(b)
▶$4.4KraisedAug 2025 · 1 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- David HartwigDirector
- Joni KlippertExecutive Officer, Director, Promoter
- Greg SandsDirector
- Bryce AmbraziunasExecutive Officer
- Scott GerlachExecutive Officer, Promoter
- Todd VernonDirector, Promoter
- Offering amount
- $4.4K
- Amount sold
- $4.4K
- First sale
- Jul 2025
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
▶$22.6KraisedNov 2023 · 1 investors · OtherRule 506(b)
▶$22.6KraisedNov 2023 · 1 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Greg SandsDirector
- Todd VernonDirector, Promoter
- Bryce AmbraziunasExecutive Officer
- Joni KlippertExecutive Officer, Director, Promoter
- Scott GerlachExecutive Officer, Promoter
- David HartwigDirector
- Offering amount
- $22.6K
- Amount sold
- $22.6K
- First sale
- Nov 2023
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$29.6KraisedSep 2022 · 1 investors · OtherRule 506(b)
▶$29.6KraisedSep 2022 · 1 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Ryan SevernsExecutive Officer, Promoter
- Greg SandsDirector
- David HartwigDirector
- Joni KlippertExecutive Officer, Director, Promoter
- Todd VernonDirector, Promoter
- Scott GerlachExecutive Officer, Promoter
- Offering amount
- $29.6K
- Amount sold
- $29.6K
- First sale
- Sep 2022
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$20.7MraisedMay 2022 · 19 investors · OtherRule 506(b)
▶$20.7MraisedMay 2022 · 19 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Ryan SevernsExecutive Officer, Promoter
- Joni KlippertExecutive Officer, Director, Promoter
- Scott GerlachExecutive Officer, Promoter
- David HartwigDirector
- Greg SandsDirector
- Todd VernonDirector, Promoter
- Offering amount
- $20.7M
- Amount sold
- $20.7M
- First sale
- Mar 2022
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$16.4KraisedApr 2021 · 1 investors · OtherRule 506(b)
▶$16.4KraisedApr 2021 · 1 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Todd VernonDirector, Promoter
- Greg SandsDirector
- Scott GerlachExecutive Officer, Promoter
- Joni KlippertExecutive Officer, Director, Promoter
- Ryan SevernsExecutive Officer, Promoter
- David HartwigDirector
- Offering amount
- $16.4K
- Amount sold
- $16.4K
- First sale
- Mar 2021
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$10MraisedNov 2020 · 9 investors · OtherRule 506(b)
▶$10MraisedNov 2020 · 9 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Greg SandsDirector
- Scott GerlachExecutive Officer, Promoter
- Joni KlippertExecutive Officer, Director, Promoter
- Todd VernonDirector, Promoter
- Ryan SevernsExecutive Officer, Promoter
- David HartwigDirector
- Offering amount
- $10M
- Amount sold
- $10M
- First sale
- Oct 2020
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
▶$4.8KraisedJul 2020 · 1 investors · OtherRule 506(b)
▶$4.8KraisedJul 2020 · 1 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- Todd VernonDirector, Promoter
- Joni KlippertExecutive Officer, Director, Promoter
- Scott GerlachExecutive Officer, Promoter
- Ryan SevernsExecutive Officer, Promoter
- Offering amount
- $4.8K
- Amount sold
- $4.8K
- First sale
- Jul 2020
- Incorporated
- Corporation, Delaware, 2019
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Founder mafia
4 people who came through StackHawk went on to found or lead other companies.
Related companies · 10
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In the news
Frequently asked questions
- What does StackHawk do?
- StackHawk provides an API security tool designed for software development teams to identify and fix security vulnerabilities in real-time as part of their development workflow. The platform targets developers and modern software teams seeking to integrate security checks into continuous integration and deployment practices.
- Who founded StackHawk?
- StackHawk was founded by Joni Klippert, Scott Gerlach, Bryce Ambraziunas, Ryan Severns in 2019.
- Who are StackHawk's investors?
- StackHawk's investors include Alumni Ventures, Costanoa Ventures, Flybridge Capital Partners, Foundry, Mana Ventures, Matchstick Ventures, Sapphire Ventures, Skyview Ventures and 1 more.
- How much funding has StackHawk raised?
- StackHawk has disclosed $50.2M raised across 11 rounds.
- Where is StackHawk headquartered?
- StackHawk is headquartered in Denver, US.