StillMark

ActiveVenture Capital

Updated: Dec 20, 2025 ·

Financial History

Total Raised

N/A

Valuation

N/A

Investments Made

Date	Company	Round	Lead Investor(s)	Co-Investor(s)
Nov 1, 2025	VIDA	$4.0M Series A	—	Trammell Venture Partners
Oct 1, 2025	Meanwhile	$82.0M Series B	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Apr 1, 2025	Meanwhile	$40.0M Series A	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper
Apr 1, 2025	Vivere Partners	$8.0M Series A	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Dec 1, 2024	Bitstack	$5.0M Seed	—	Trammell Venture Partners
Jul 1, 2024	VIDA	$3.0M Seed	—	Cherry Ventures
May 1, 2024	OffDeal	$5.0M Seed	—	Alumni Ventures, Castle Island Ventures, NEO, Red Swan Ventures, Ride Ventures, Trammell Venture Partners, Y Combinator, Stephen Cole
Dec 1, 2023	Mulberri	$7.0M Series A	—	Acrew Capital, Bain Capital Crypto, Eos Venture Partners, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Sep 1, 2023	Afterparty	$5.0M Venture Round	—	Acrew Capital, Bain Capital Crypto, Blockchange Ventures, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Plug & Play Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Martin Olczyk, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Aug 1, 2023	Knot	$10.0M Series A	—	01 Advisors, 305 Ventures, Acrew Capital, American Express Ventures, Atomico, Bain Capital Crypto, Champion Hill Labs, Convective Capital, Craft Ventures, Expert Dojo, Exponent Founders Capital, First Round Capital, Four Rivers Group, General Catalyst, Giant Ventures, Global Ventures, Harrison Metal, IntangibleVC, Interplay Ventures, KW Angel Fund, LGF, Mouro Capital, MS&AD Ventures, Pareto Holdings, Plug & Play Ventures, Sarona Ventures, SciFi VC, Seedcamp, SoftBank Investment Advisers, Spark Capital, SV Angel, Vouch Insurance, Alison Engel, Ameet Ranadive, Biz Stone, Charlie Songhurst, David Petersen, Dylan Field, Eoghan McCabe, Eric Wei, George Burke, Hunter Horsley, Jason Robins, Jeff Seibert, Jeremy Cai, Jeremy Yap, Jesse Leimgruber, John Carleton, Jose Gaztelu, Karim Atiyeh, Kevin Lin, Kevin Weil, Luke Sherwin, Michael Pennington, Neil Parikh, Othman Laraki, Pamela Valdes, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Jul 1, 2023	Voiceflow	$20.0M Series A	—	Kevin Hartz, A* Capital (A Star Capital), Acrew Capital, AIX Ventures, Angular Ventures, Bain Capital Crypto, Bond, C2 Investment, Cool Climate Collective, Exponent Founders Capital, Felicis Ventures, General Catalyst, Hack VC, Innovation Endeavors, Insight Partners, Jetstream, LGF, Mouro Capital, MS&AD Ventures, Northzone, Preston-Werner Ventures, Redpoint Ventures, Sapphire Ventures, Sequoia Capital, Techstart Ventures, Vouch Insurance, Weekend Fund, Y Combinator, Frederic Kerrest, Guy Podjarny, Hunter Horsley, Jeff Hammerbacher, Karim Atiyeh, Parker Conrad, Peter Sonsini, Sam Altman, Sam Blond, Sean Harper, Wences Casares, Yan-David Erlich
Jul 1, 2023	Longshot Space Technologies	$2.0M Seed	—	Acrew Capital, Alt Capital, Bain Capital Crypto, Exponent Founders Capital, Founders Fund, General Catalyst, Hanabi Capital, LGF, Mouro Capital, MS&AD Ventures, Saga, ShareBear Capital, Starship Ventures, Vouch Insurance, Adam Guild, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Shane Curran, Wences Casares
Jul 1, 2023	Resend	$3.0M Seed	—	10100, Acrew Capital, Ardent Venture Partners, Bain Capital Crypto, Blossom Capital, Cavalry Ventures, Cherubic Ventures, Expa, Exponent Founders Capital, Felicis Ventures, General Catalyst, Gradient Ventures, HV Capital, LGF, Jared Hecht, Mouro Capital, MS&AD Ventures, Picus Capital, QED Investors, Race Capital, Sound Ventures, Summit Partners, SV Angel, Vouch Insurance, Aaron Levie, Adrian Aoun, Charlie Songhurst, Dylan Field, Eddie Hartman, Eric Wu, Felix Jahn, Gokul Rajaram, Hunter Horsley, Immad Akhund, Jenna Hannon, Jonathan Swanson, Karim Atiyeh, Kevin Lin, Max Mullen, Mike Krieger, Oliver Cameron, Parker Conrad, Sam Altman, Sam Blond, Saturnin Pugnet, Scott Belsky, Sean Harper, Steve Chen, Vivek Patel, Wences Casares, Guillermo Rauch
Jun 1, 2023	nocnoc	$14.0M Series A	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, Globo Ventures, IGNIA Partners, LGF, Mouro Capital, MS&AD Ventures, Quona Capital, Vouch Insurance, Dylan Field, Flavio Dias, Hunter Horsley, Karim Atiyeh, Parker Conrad, Paulo Piccini, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Jun 1, 2023	Meanwhile	$19.0M Seed	—	2048 Ventures, Accel, Access Biotechnology, Acrew Capital, Afore Capital, AirAngels, Alt Capital, AngelList, Bain Capital Crypto, Adeyemi Ajao, Basis Set Ventures, BlockTower Capital, Broadhaven Capital Partners, C2 Investment, Coatue, Data Tech Fund, Elefund, Embedded Ventures, Exponent Founders Capital, Founder Collective, General Catalyst, Greylock, Kleiner Perkins, LAUNCH, LGF, Lightspeed Venture Partners, Lowercarbon Capital, monashees, Mouro Capital, MS&AD Ventures, NEO, Pale Blue Dot, Patron, Polygon, Prototype Capital, Ride Ventures, Sarona Ventures, Scalar Capital, Sixth Street, Softbank Latin America Fund, Spark Capital, The Hit Forge, True Ventures, venBio, Vouch Insurance, Westlake Village BioPartners, Xochi Ventures, Y Combinator, Aaron Levie, Ajit Tripathi, Akshay Kothari, Anne Wojcicki, Arash Ferdowsi, Ben Tossell, Biz Stone, Claire Hughes Johnson, Do Kwon, Dylan Field, Fidji Simo, Frederic Kerrest, Gokul Rajaram, Howie Liu, Hunter Horsley, Jeremy Stoppelman, Justin Mateen, Karim Atiyeh, Kunal Shah, Louis Beryl, Luca Ascani, Max Mullen, Neha Narkhede, Parker Conrad, Ricardo Weder, Roger Laughlin Carvallo, Sam Altman, Sam Blond, Scot Wingo, Sean Behr, Sean Harper, Sep Kamvar, Shishir Mehrotra, Tim Griffin, Wences Casares
Apr 1, 2023	AMBOSS	$4.0M Seed	—	Castle Island Ventures
Dec 1, 2022	Gridless	$2.0M Seed	—	London Venture Partners
Jul 1, 2022	Mulberri	$4.0M Seed	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, LGF, Mouro Capital, MS&AD Ventures, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
May 1, 2022	Pnkfrg Studios	$3.0M Seed	—	London Venture Partners, March Capital, Eric Bunting
Apr 1, 2022	IBEX Mercado	$4.0M Seed	—	Blockchain Capital, Future Perfect Ventures, Oak HC/FT, Two Sigma Ventures, Brock Pierce
Apr 1, 2022	Afterparty	$4.0M Seed	—	75 & Sunny, 7BC Venture Capital, Acrew Capital, Alumni Ventures, Bain Capital Crypto, Blockchange Ventures, Cream City Venture Capital, Eos Venture Partners, Exponent Founders Capital, gener8tor, General Catalyst, LAUNCH, LGF, Moderne Ventures, Montage Ventures, Mouro Capital, MS&AD Ventures, Multicoin Capital, Palm Tree Crew Investments, QED Investors, Rubicon VC, Viola Ventures, Vouch Insurance, Will Ventures, Alex Adelman, Andre Iguodala, Daren Cotter, Dylan Field, Hunter Horsley, Karim Atiyeh, Louis Beryl, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Apr 1, 2022	Hydra Host	$10.0M Seed	—	Accelerator Ventures, Arrive, Atlantic Bridge University Fund, Bennu, Browder Capital, Daffy, Flex Capital, Founder Collective, GateCap Ventures, Gigascale Capital, Global Innovation Fund, Greylock, Harrison Metal, Helium-3 Ventures, Horizon 3 Venture Studio, KHOCEL INVEST, Mechanism Capital, Multicoin Capital, Operator Ventures, Ribbit Capital, Seraphim Space, Shine Capital, Silicon Ventures, Solana Ventures, TenOneTen Ventures, Todd and Rahul's Angel Fund, Trammell Venture Partners, Unpopular Ventures, UP.Partners, Aaron Levie, Amy Chang, Baron Davis, Brian Totty, Curtis Lee, David Rogier, Dylan Field, Elie Seidman, Elliot Shmukler, Eric Wei, Eric Wu, Gina Bianchini, Gokul Rajaram, Harris Barton, Hunter Horsley, Johannes De Waal, Joshua Reeves, Luc Levesque, Mark Pincus, Mark Williamson, Matias Woloski, Matthew Dellavedova, Sahin Boydas, Scott Kleper, Stephen Cole, Trevor Blackwell
Mar 1, 2022	nocnoc	$7.0M Seed	—	Acrew Capital, Bain Capital Crypto, Exponent Founders Capital, General Catalyst, Globo Ventures, LGF, Mouro Capital, MS&AD Ventures, Quona Capital, Vouch Insurance, Dylan Field, Hunter Horsley, Karim Atiyeh, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Nov 1, 2021	Afterparty	$3.0M Seed	—	75 & Sunny, Acrew Capital, Bain Capital Crypto, Blockchange Ventures, Elefund, Exponent Founders Capital, General Catalyst, LAUNCH, LGF, Lightspeed Venture Partners, Mouro Capital, MS&AD Ventures, Multicoin Capital, Palm Tree Crew Investments, Paradigm, Robot Ventures, Scale Asia Ventures, Sequoia Capital, Vouch Insurance, Y Combinator, Alex Adelman, Andre Iguodala, Dylan Field, Hunter Horsley, Karim Atiyeh, Louis Beryl, Parker Conrad, Sam Altman, Sam Blond, Sean Harper, Wences Casares
Oct 1, 2021	Satoshi Energy	$2.0M Seed	—	GateCap Ventures, Mechanism Capital, Trammell Venture Partners, Unpopular Ventures, Baron Davis, Johannes De Waal, Matthew Dellavedova, Stephen Cole

Financial History

Total Raised

N/A

Valuation

N/A

Leadership Team

Key people at StillMark.

Alyse Killeen

Managing Partner

Leadership Team

Key people at StillMark.

Alyse Killeen

Managing Partner

Deep Dive

Stillmark is a venture capital firm founded in 2019, uniquely focused on investing in companies building on Bitcoin and its ecosystem. Its mission is to back founders whose products and technologies embody and advance Bitcoin’s core principles, supporting durable innovation in the Bitcoin space across sectors such as financial services, software, big data, cryptocurrency, retail, healthcare, and e-commerce. Stillmark invests primarily in minority seed, early-stage, and later-stage rounds, aiming to identify large-scale opportunities unlocked or advanced by Bitcoin technology. The firm plays a significant role in the startup ecosystem by providing capital, expertise, and a deep network to founders pioneering Bitcoin-based solutions, especially those targeting underserved populations like the unbanked and underbanked[1][2][3][4][5].

Stillmark was founded by Alyse Killeen, a seasoned investor with over a decade of experience in frontier technologies and one of the earliest institutional investors in Bitcoin since 2013. Her background includes venture capital roles at Clearstone Ventures Partners and March Capital Partners, focusing on data science, cloud networking, and cybersecurity before founding Stillmark to concentrate exclusively on Bitcoin innovation. The firm’s evolution reflects a deepening specialization in Bitcoin and Lightning Network technologies, with a team including Principal Vikash Singh, who focuses on identifying breakout companies in these areas. Early traction for Stillmark came from investments in pioneering Bitcoin companies like Blockstream, where Alyse serves as a board director[2][3].

Core Differentiators

Bitcoin-Dedicated Focus: Stillmark is the first venture capital firm dedicated exclusively to Bitcoin, combining traditional VC experience with deep technical insight into Bitcoin’s open-source protocols.
Network Strength: Nearly a decade in the Bitcoin ecosystem has built Stillmark a vast network of founders, operators, and collaborators, which supports deal sourcing, diligence, and portfolio company growth.
Investment Expertise: The firm’s team brings a blend of traditional venture capital rigor and specialized knowledge in Bitcoin and Lightning Network technologies.
Founder Support: Stillmark emphasizes close collaboration with founders, providing operational insights and support through all stages of company growth.
Cross-Sector Vision: While Bitcoin-focused, Stillmark invests across multiple sectors where Bitcoin technology can unlock new value, such as financial services, software, and retail[2][3][4].

Role in the Broader Tech Landscape

Stillmark rides the wave of increasing adoption and innovation around Bitcoin as a foundational technology for decentralized finance, payments, and digital asset ownership. The timing is critical as Bitcoin’s Lightning Network and related Layer 2 technologies mature, enabling scalable, low-cost transactions that can serve global populations underserved by traditional finance. Market forces such as growing demand for financial inclusion, regulatory clarity, and institutional interest in digital assets favor Stillmark’s investment thesis. By backing companies that leverage Bitcoin’s unique properties, Stillmark influences the broader ecosystem by accelerating the development of infrastructure and applications that could redefine finance, banking, and payments worldwide[3][5].

Quick Take & Future Outlook

Looking ahead, Stillmark is poised to deepen its influence as Bitcoin technology continues to evolve and gain mainstream traction. Trends shaping its journey include the expansion of Layer 2 solutions like Lightning, the integration of Bitcoin into new financial products, and the growing global push for decentralized, permissionless money systems. Stillmark’s continued focus on founder support and network leverage positions it to identify and nurture the next generation of Bitcoin-powered companies. Its role as a pioneer Bitcoin-focused VC gives it a durable competitive advantage, likely enabling it to shape the future of digital finance and related sectors for years to come[2][3][5].

Sources

Core Differentiators

Bitcoin-Dedicated Focus: Stillmark is the first venture capital firm dedicated exclusively to Bitcoin, combining traditional VC experience with deep technical insight into Bitcoin’s open-source protocols.
Network Strength: Nearly a decade in the Bitcoin ecosystem has built Stillmark a vast network of founders, operators, and collaborators, which supports deal sourcing, diligence, and portfolio company growth.
Investment Expertise: The firm’s team brings a blend of traditional venture capital rigor and specialized knowledge in Bitcoin and Lightning Network technologies.
Founder Support: Stillmark emphasizes close collaboration with founders, providing operational insights and support through all stages of company growth.
Cross-Sector Vision: While Bitcoin-focused, Stillmark invests across multiple sectors where Bitcoin technology can unlock new value, such as financial services, software, and retail[2][3][4].