Eugenia Kuyda has spent over a decade building at the frontier of AI consumer products. First by founding Replika in 2014, hitting 30M users in conversational AI before ChatGPT even existed. Now, building Wabi: giving everyone the ability to build personal software. In this episode, she breaks down why she’s repeatedly chosen the solo founder path, why “co-founders by pressure” create long-term damage, and what it actually takes to keep going when things get brutally hard.

This is a conversation about conviction, authorship, loneliness, team-building, and the emotional reality of leading through uncertainty. Eugenia shares the difference between being truly solo vs. being isolated, why she treats founding as a team sport anyway, and how she thinks about hiring high-agency people who can operate like owners.

Topics covered

- Why many “co-founder” setups are functionally one decision-maker anyway
- The risk of “co-founder by default” decisions
- Why it’s better to be solo than misaligned at the top
- Streamlining your startup's layers from three down to two by removing co-founders
- Storytelling as a core founder advantage
- Team-building without co-founder hierarchy
- The emotional bear case for solo founding
- The speed and clarity bull case for solo founding

Guest: Eugenia Kuyda — founder and CEO behind visionary AI products like Replika and Wabi.

Charles Hudson is the founder and managing partner of Precursor Ventures, where he's invested in over 500 companies as a solo GP. He shares a data point that challenges the co-founder consensus: 25-30% of his portfolio companies lose a co-founder before Series A. In this conversation, he explains why talented solo founders beat mismatched teams, the real cost of dead equity, and why you should never give away 40% of your company just to make fundraising easier.

Topics covered:
- The co-founder breakup rate: 25-30% before Series A
- Dead equity and cap table damage from co-founder departures
- Rivalry and resentment dynamics in co-founding teams
- Why investors underrate solo founders
- The "team sport" analogy reframed
- Denominator delusion: failed co-founding teams nobody counts
- Don't give away 40% of your company for fundraising optics
- Authorship and full accountability as a solo founder
- Fundraising advice: don't apologize for being solo
- Late-joining co-founders and how to evaluate them
- The solo GP / solo founder kinship
- The emotional reality: loneliness is 10x what you expect
- Bear case and bull case for solo founding

Guest: Charles Hudson — Founder and Managing Partner, Precursor Ventures. Solo GP. 500+ investments. Former partner at SoftTech VC (now Uncork Capital). Former Google and Genentech.

Paul Klein IV applied to 500 internships and got rejected from 498. Now he's the solo founder of Browserbase – a headless browser infrastructure company for AI agents – valued at $300M in under 14 months. He didn't choose to be a solo founder. He tried to find a co-founder and couldn't. In this conversation, he explains why that turned out to be the right thing.

Topics covered:

• Why Paul thinks first-time founders should not be solo founders
• The five-tool founder concept: product, sales, fundraising, hiring, and operations
• StreamClub founding story and lessons from having co-founders
• How a 3,000-word memo validated the Browserbase idea
• Solo founder by circumstance: trying and failing to find a co-founder
• Hiring philosophy: contractors as work trials, DM recruiting on Twitter
• Fundraising as relationship building, not a tight process
• Company culture: emotional vulnerability, second chances, non-traditional backgrounds
• The quarterback to head coach to GM evolution of a solo founder CEO
• Operating cadence: daily standups, weekly syncs, monthly all-hands, quarterly board meetings
• Brand building through word of mouth
• The honest case for and against solo founding

Guest: Paul Klein IV, Solo founder and CEO of Browserbase. Former CTO/co-founder of StreamClub (acquired by Mux). Former software engineer at Twilio.

Notes & more from this episode: https://solofounders.com/blog/from-500-rejections-to-a-300m-company-paul-klein-iv-on-solo-founding-browserbase/

Apply to Solo Founders Program: https://solofounders.com/program

Ben ran global teams at Travis Kalanick's Cloud Kitchens and left to build Polsia — an AI company builder — completely solo. Now he's hit $1.5M ARR in two weeks with 1,500 companies running on the platform.

In this conversation, we explore how his method of building might be the future of solo founding: his 80/20 framework for AI-native companies, why he designed his product after a video game about an AI apocalypse, the Daft Punk song on his about page, and what it actually looks like to run engineering, support, marketing, and strategy with zero employees.

Topics covered:

• The 80/20 framework for AI-native companies
• Scoping AI agents like real employees: trust boundaries and authority
• Building for yourself vs. building for imaginary customers
• Universal Paperclips and Daft Punk as design inspiration
• The Polsia product: how it builds and runs businesses autonomously
• Making a company 100% AI-autonomous: the thought experiment
• Advice for new builders: push AI to the edge

Guest: Ben Cera — Solo founder of Polsia, an AI company builder. Former Global GM at Cloud Kitchens.

Notes & more from this episode: https://solofounders.com/blog/80-ai-20-taste-ben-cera-on-the-future-of-solo-founding/

Apply to Solo Founders Program: https://solofounders.com/program