
Haley Berkoe asks some of the biggest names in bitcoin and Silicon Valley 21 questions in 21 minutes, from the personalities you know and love to tech’s unsung heroes. A new episode drops when someone stops by Presidio Bitcoin. Reach out if you are or will be in the area and are interested in being on the show. presidiobitcoin.substack.com
| Publishes | Twice monthly | Episodes | 39 | Founded | a year ago |
|---|---|---|---|---|---|
| Number of Listeners | Categories | TechnologyBusiness | |||

0xSero joins Haley Berkoe on 21 in 21 to discuss local AI, open models, and his soon-to-be-released platform for benchmarking open models and hardware (local.ai). He explains how his team benchmarks models and hardware, why local AI is becoming more ... more
Haley Berkoe sits down with Bradley Axen, who is leading many of Block's AI initiatives, including Buzz, a new open-source collaboration platform designed for humans and AI agents to work together. He also helped create goose, the open-source AI agen... more
Mic Neale, a member of the Spiral team at Block and a core developer of goose, an open source AI agent, joins Haley Berkoe on 21 in 21 to discuss goose, Mesh LLM, and open source AI. Mic shares how goose has evolved from a desktop app and CLI into th... more
Patrick Ball, Director of Research at the Human Rights Data Analysis Group, joins Haley Berkoe on 21 in 21 to discuss how data, bitcoin, and AI can help defend human rights. Patrick explains how his team uses statistics to document mass violence, how... more
People also subscribe to these shows.





Key themes from listener reviews, highlighting what works and what could be improved about the show.
How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.
Apple Podcasts | #114 | |
Apple Podcasts | #119 |
Recent interactions between the hosts and their guests.
Listeners, social reach, demographics and more for this podcast.
| Listeners per Episode | |
|---|---|
| Gender Skew | |
| Location | |
| Interests | |
| Professions | |
| Age Range | |
| Household Income | |
| Social Media Reach |
A short-form interview series features high-profile figures from Bitcoin, tech, and Silicon Valley answering 21 rapid questions in about 21 minutes. Conversations span Bitcoin adoption, AI intersections, developer tooling, and community-building, with a consistent thread of practical, real-world impact—from merchant adoption to open-source projects and design-focused UX. The format tends to surface bold visions for digital money, privacy-preserving tech, and the ways builders can turn ideas into products quickly, making complex topics accessible for practitioners and enthusiasts alike. Noteworthy is the recurring emphasis on hands-on projects, open collaboration, and a bias toward actionable takeaways for developers, founders, and merchants... more
Rephonic provides a wide range of podcast stats for 21 in 21. We scanned the web and collated all of the information that we could find in our comprehensive podcast database. See how many people listen to 21 in 21 and access YouTube viewership numbers, download stats, audience demographics, chart rankings, ratings, reviews and more.
Rephonic provides a full set of podcast information for three million podcasts, including the number of listeners. View further listenership figures for 21 in 21, including podcast download numbers and subscriber numbers, so you can make better decisions about which podcasts to sponsor or be a guest on. You will need to upgrade your account to access this premium data.
Rephonic provides comprehensive predictive audience data for 21 in 21, including gender skew, age, country, political leaning, income, professions, education level, and interests. You can access these listener demographics by upgrading your account.
To see how many followers or subscribers 21 in 21 has on Spotify and other platforms such as Castbox and Podcast Addict, simply upgrade your account. You'll also find viewership figures for their YouTube channel if they have one.
These podcasts share a similar audience with 21 in 21:
1. PBJ
2. Rabbit Hole Recap
3. TFTC: A Bitcoin Podcast
4. What Bitcoin Did
5. Coin Stories with Natalie Brunell
21 in 21 launched a year ago and published 39 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.
Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.
Rephonic pulls ratings and reviews for 21 in 21 from multiple sources, including Spotify, Apple Podcasts, Castbox, and Podcast Addict.
View all the reviews in one place instead of visiting each platform individually and use this information to decide if a show is worth pitching or not.
Rephonic provides full transcripts for episodes of 21 in 21. Search within each transcript for your keywords, whether they be topics, brands or people, and figure out if it's worth pitching as a guest or sponsor. You can even set-up alerts to get notified when your keywords are mentioned.
Recent guests on 21 in 21 include:
1. Sharif (0xSero)
2. Bradley Axen
3. Mic Neale
4. Patrick Ball
5. Linn Bieske
6. Rainey Reitman
7. Michael Saylor
8. Andi Pitt
To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.