About Big O PR

We are a boutique PR agency specializing in helping B2B software companies. Past and current customers include:

  • Airbyte – data integration platform and ELT tool
  • Cloud Foundry – open source, multi-cloud application platform as a service
  • Coder – Self-Hosted Cloud Development Environment
  • Data on Kubernetes Community – Where users go to run data on Kubernetes
  • Datree – Open-source Kubernetes scanner
  • Jetic – Open-source application integration platform
  • Mirantis – open source cloud computing software and services company
  • OpsVerse – Fully managed DevOps tools platform
  • Qovery –  Internal Developer Platform
  • Loft – Virtual Kubernetes Clusters
  • Luos – Open-source and real-time orchestrator for cyber-physical-systems

About our founder

Sylvain Kalache is an entrepreneur and software engineer who has worked in the tech industry for over a decade. He started his media career by leading PR initiatives as a startup entrepreneur, getting his company published in top-tier publications such as The New York Times, The Wall Street Journal, CNN, Fortune, Forbes, and The Financial Times and tier-one trade publications, including TechCrunch, and VentureBeat.

He is the Co-Founder of Holberton School, an education company training the next generation of digital talent at scale. Holberton educates thousands of students in over 25 countries, hired by the best tech companies like Google, LinkedIn, Tesla, Apple, and NASA.

Through his work, he partnered with technology leaders, including LinkedIn CEO Jeff Weiner, Yahoo! Founder Jerry Yang, Docker founder Solomon Hykes, and Facebook VP Payments Stephane Kasriel. But also sports and entertainment leaders like Grammy-Award winner NE-YO,  actress Priyanka Chopra, and New York Jets NFL player Kelvin Beachum.

Before Holberton School, he joined SlideShare as a Software Engineer to support the infrastructure that served 3 billion slides every month. LinkedIn acquired the company, where he worked as a senior software engineer. He co-founded while42, a non-profit organization that became the largest community of french software engineers, located in 40 cities with 3,000 members.

Sylvain regularly writes for

How we work

Big O PR is a consultancy serving tech entrepreneurs by tech entrepreneurs. Our customers hire us to market technical products to a software engineering audience. 

It may be said that developers are not receptive to marketing. We believe software engineers are receptive to marketing, one that is authentic, technical, and provides meaningful insights.

That's where our engineering background comes handy. We make sure to truly understand our customer's products so that the messaging that ensues is precisely crafted.

Like in a tech startup, we work fast and constantly deliver. Our goal is always to be ahead of our customers so we are not a bottleneck but a multiplier of their growth.


Draw in customers


Grow your company brand


Prime for fundraising


Elevate your personal brand