WHO ARE WE?

Thrivelia was founded in 2021 by Trayan Hristov, our Founder and CEO. We are a Klaviyo Platinum Master Partner supporting ecommerce, subscription and SaaS brands with a hybrid team across London and Sofia.

Trayan founded the agency around a simple belief: a stronger brand keeps earning its customers’ trust after checkout. The Marketing Hourglass connects discovery and first purchase with product adoption, repeat purchases and advocacy. Progressive Personalisation makes the next message more useful as the relationship develops.

That thinking became Retention. Perfected. and the principles our team puts to work: understand the customer, make the creative useful and measure what changes. Read the Hourglass playbook for the framework behind the work.

Our team brings lifecycle strategy, account management, copy, design and implementation together. Strategy sets the customer transition and commercial priority. Creative gives the message a reason to be read. Technical execution turns it into a tested journey with appropriate entry conditions, exclusions and timing. Measurement helps the team decide what to repair, develop or simplify next.

We begin with customer research and account evidence. A welcome programme for apparel, a replenishment journey for supplements and activation for a software product need different messages and success measures. We coordinate with the brand’s internal team and agree responsibilities before building.

Our client case studies explain the challenge, work and reported results. Where figures are available, the reporting period and attribution context matter. They describe that client’s experience rather than promise a result for another business.

Explore our services and ways to work together, including audits, ongoing retention partnerships, flow projects and consultancy. The first conversation helps establish the right scope for your team.

​Trayan has contributed to the Klaviyo blog. Read his article on enterprise customer data, published on 19 October 2026, and view his Klaviyo author page.