21 in 21
Episodes
21 in 21: Mark Suman on Privacy-First AI
13 Jan 2026
Contributed by Lukas
Mark Suman, co-founder and CEO of Maple AI, a privacy-first AI chat platform known as “the Signal of AI,” joins Haley Berkoe on 21 in 21. Mark exp...
21 in 21: David Gumberg on the Chaincode ₿OSS Challenge and Becoming a Bitcoin Core Contributor
17 Dec 2025
Contributed by Lukas
Haley Berkoe sits down with David Gumberg, a Bitcoin Core contributor at Localhost, a bitcoin-focused research center in the Bay Area. David shares ho...
21 in 21: Rod Roudi
11 Dec 2025
Contributed by Lukas
In this episode of 21 in 21, Haley sits down with Rod Roudi, co-founder of Bitcoin Park in Nashville and Austin. Rod breaks down how Bitcoin Park bega...
21 in 21: Joe Carlo on How Bitcoin Changed Pink Owl Coffee Forever
30 Oct 2025
Contributed by Lukas
Haley Berkoe sits down with Joe Carlo, co-owner of Pink Owl Coffee, a café that began in San Rafael, California, and has since expanded to three loca...
21 in 21: Kyle Olney
28 Oct 2025
Contributed by Lukas
Kyle Olney joins Haley Berkoe to talk about defending bitcoin’s foundational freedoms. A longtime Silicon Valley product leader turned bitcoin advoc...
21 in 21: Nick Slaney
21 Oct 2025
Contributed by Lukas
In this episode of 21 in 21, Nick Slaney joins Haley Berkoe during Presidio Bitcoin Design Week. Nick is the founder of Money Dev Kit, a new startup b...
21 in 21: Erik Cativo
15 Oct 2025
Contributed by Lukas
During Bitcoin Design Week at Presidio Bitcoin, product designer and HRF grantee Erik Cativo joined the show to talk about designing the future of mon...
21 in 21: Kyle Fletcher
02 Oct 2025
Contributed by Lukas
Haley Berkoe is joined by Kyle Fletcher, Principal Design Director at Block, to explore the intersection of bitcoin, design, and culture. They discuss...
21 in 21: Christoph Ono
24 Sep 2025
Contributed by Lukas
In this episode of 21 in 21, Haley is joined by Christoph Ono, co-founder of the Bitcoin Design Foundation and longtime contributor to the Bitcoin Des...
21 in 21: Conor Okus
05 Sep 2025
Contributed by Lukas
In this episode, Haley Berkoe interviews Conor Okus, a Product Manager at Spiral. Conor shares his journey from playing football to becoming a grantee...
21 in 21: Mogashni Naidoo
28 Aug 2025
Contributed by Lukas
Haley Berkoe sits down with Mogashni “Mo” Naidoo — UX researcher, designer, and co-founder of the Bitcoin Design Foundation. Mo shares her path ...
21 in 21: Matthew Pines
19 Aug 2025
Contributed by Lukas
Haley Berkoe talks with Matthew Pines, Executive Director of the Bitcoin Policy Institute, about bitcoin’s growing role in U.S. policy. They cover b...
21 in 21: Tadge Dryja
12 Aug 2025
Contributed by Lukas
Haley Berkoe met with Tadge Dryja, a bitcoin developer, researcher, and co-creator of the Lightning Network. They discussed the importance of preparin...
21 in 21: Jameson Lopp
07 Aug 2025
Contributed by Lukas
In this episode, Haley Berkoe chats with Jameson Lopp, longtime bitcoiner, cypherpunk, and Chief Security Officer at Casa, to explore the long-term th...
21 in 21: Alex Pruden
05 Aug 2025
Contributed by Lukas
This episode features Alex Pruden, the Chairman of Aleo and the CEO of Project Eleven, an applied R&D lab focused on the intersection of quantum compu...
21 in 21: Alex Gladstein
31 Jul 2025
Contributed by Lukas
In this episode, Haley Berkoe sits down with Alex Gladstein, Chief Strategy Officer at the Human Rights Foundation. They discuss how AI tools are empo...
21 in 21: Ryan Loomba
15 Jul 2025
Contributed by Lukas
Haley Berkoe sat down with Ryan Loomba, a Bitcoin Engineer at Block. Ryan shares his journey from early startup life to working across Square, Cash Ap...
21 in 21: Alex Zukauskas
10 Jul 2025
Contributed by Lukas
In this episode, Haley Berkoe interviews Alex Zukauskas, the Presidio Bitcoin Lead. Alex shares his background, discusses past and upcoming events, an...
21 in 21: Clara Shikhelman
02 Jul 2025
Contributed by Lukas
Haley Berkoe met with Clara Shikhelman, the Head of Research at Chaincode Labs. Clara has been researching complex mathematical problems for nearly a ...
21 in 21: Ben Carman
26 Jun 2025
Contributed by Lukas
Haley Berkoe met with Ben Carman, who recently joined the Spiral team to work on the Lightning Development Kit and LDK-related projects. Previously he...
21 in 21: Stephen DeLorme
05 Jun 2025
Contributed by Lukas
In this episode, Haley Berkoe sat down with Stephen DeLorme, a Product Designer at Voltage and co-founder of ATL BitLab, a bitcoin-focused hackerspace...
21 in 21: Ella Hough
03 Jun 2025
Contributed by Lukas
Haley Berkoe met with Ella Hough, who has dedicated significant time to educating younger generations about bitcoin. She just completed her bitcoin-fo...
21 in 21: Laolu Osuntokun
24 May 2025
Contributed by Lukas
Haley Berkoe interviewed Laolu Osuntokun, also known as Roasbeef. He’s a longtime bitcoiner, the CTO and co-founder of Lightning Labs, and lead deve...
21 in 21: Daniel Nordh
13 May 2025
Contributed by Lukas
Haley Berkoe interviewed Daniel Nordh, co-founder of the Bitcoin Design Foundation and one of the longest-serving contributors to the Bitcoin Design C...
21 in 21: Neha Narula
06 May 2025
Contributed by Lukas
Haley Berkoe sat down with Neha Narula, the Director of the MIT Digital Currency Initiative, which supports research in cryptocurrency and blockchain ...
21 in 21: Shehzan Maredia
16 Apr 2025
Contributed by Lukas
Haley Berkoe met with Shehzan Maredia, the founder and CEO of Lava, a self-custodial solution for borrowing against bitcoin. FOLLOW: Shehzan Maredia: ...
21 in 21: Pierre Rochard
11 Apr 2025
Contributed by Lukas
Haley Berkoe sat down with Pierre Rochard, who recently launched The Bitcoin Bond Company. Rochard is a longtime bitcoiner, having previously served a...
21 in 21: Niftynei
08 Apr 2025
Contributed by Lukas
Haley sat down with Niftynei, a seasoned Lightning developer, bitcoin educator, and conference organizer. Be sure to check out Bitcoin++, the global d...
21 in 21: Jack Dorsey
01 Apr 2025
Contributed by Lukas
Haley Berkoe interviews Jack Dorsey, the CEO of Block, former CEO of Twitter, and prominent supporter of the bitcoin open-source ecosystem. FOLLOW: Ja...
21 in 21: Rockstar Dev
26 Mar 2025
Contributed by Lukas
In this inaugural episode of 21 in 21, Haley Berkoe interviews Rockstar Dev, a longtime contributor to BTCPayServer, one of the most important project...