Sergey Butko

Search

Search

Sergey Butko

Sergey Butko

CEO and Co-Founder

Sergey is a tech entrepreneur based in Kraków, Poland, recognized by Forbes 30 Under 30 Europe (2019, for CallPage) and Forbes 30 Under 30 Poland (2023, for Certifier). He co-founded CallPage, a VC-backed B2B SaaS that raised $4.5M and was later acquired by SaaS Labs in 2021, where he led marketing, growth, and lead acquisition.

In 2020, Sergey launched Certifier, a platform building digital credential infrastructure through APIs and tools for issuing, managing, and verifying certificates, diplomas, and badges. Today, Certifier serves more than 2,000 business and institutional clients worldwide, and Sergey is a frequent public voice on digital certification, identity, and the future of credentialing.

Expertise:

SaaS Growth

Digital Credentials

APIs

Product Marketing

Company Operations

Education:

  • BA Economics at Krakow University of Economics, Poland

    Studied economics and business management with a curriculum covering economic theory, finance, and quantitative analysis. Built a foundation in organizational strategy, international business, and market-driven decision-making.

Latest articles by Sergey

The Most Popular Webinar Tools and How to Use Them for Your Online Course cover image

14 Feb, 2022

The Most Popular Webinar Tools and How to Use Them for Your Online Course

How to Send Certificates Through Email in Bulk? 3 Ways to Do It In 2025 cover image

How to Send Certificates Through Email in Bulk? 3 Ways to Do It In 2025

30+ Best Certificate Design Ideas for Your Online Course cover image

30+ Best Certificate Design Ideas for Your Online Course

14 Best Practices of Certificate Design (Google, Harvard, AWS, etc.) cover image

14 Best Practices of Certificate Design (Google, Harvard, AWS, etc.)

How To Improve the Effectiveness of Your Online Webinar cover image

14 Feb, 2022

How To Improve the Effectiveness of Your Online Webinar

How To Use Certificates in B2B or B2C Marketing - Certificates as a Marketing Tool cover image

How To Use Certificates in B2B or B2C Marketing - Certificates as a Marketing Tool

The Best Online Software to Create Certificates - 9 Professional Certificate Makers (2025 update) cover image

The Best Online Software to Create Certificates - 9 Professional Certificate Makers (2025 update)

Best Apps for Online Course Creators in 2021 cover image

14 Feb, 2022

Best Apps for Online Course Creators in 2021

Why Course Certificates Are a Must for Your Online Course cover image

Why Course Certificates Are a Must for Your Online Course

Create and Send Digital Credentials

Take your digital certificate creation process to the next level. Design, issue, send, and track highly personalized certificates & badges in minutes.

G2 Rating