Sergiy Korolov
Co-CEO of Railsware and co-founder of Mailtrap, an email testing and delivery platform; discusses Mailtrap's origin, growth to seven-figure ARR, and product strategy.
Best podcasts with Sergiy Korolov
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Oct 9, 2025 • 59min
456: Mailtrap: From 20,000 Email Disaster to 7-Figure SaaS - with Sergiy Korolov
Sergiy Korolov, Co-CEO of Railsware and co-founder of Mailtrap, shares a riveting journey from a 20,000-test-email fiasco to crafting a seven-figure SaaS success. He explains how releasing an internal tool to the Rails community sparked viral growth and the slow pivot from blocking to sending emails. Discover his insights on using customer interviews for pricing strategies, the surprising role of signup surveys, and validating features with a fake menu item. Sergiy also delves into the challenges of scaling and competing in the email delivery space.
Oct 29, 2025 • 26min
The Railsware Way - Vibe Coding vs. Traditional SDLC, with Sergiy Korolov
Sergiy Korolov, Co-CEO of Railsware and co-founder of Mailtrap, explores the emerging trend of vibe-coding versus traditional software development approaches. He defines vibe-coding, discussing its potential influence and limitations. The conversation delves into why vibe-coding has surfaced, the role of AI tools in enhancing development, and engineers' reactions to this innovate method. Sergiy also shares best use cases, highlighting that while vibe-coding can help with prototypes, it struggles to scale for complex products.
