Elina L.

Founder atZennIP, Finland

I am handling everything in my business by myself, therefore it was really good to get advice from the customer’s perspective. Working with Menteli helped me see my services through their eyes, spot the gaps, and I received practical guidance on how to address these gaps.
What stood out was the honest and enthusiastic approach, and the time taken to truly understand both me and my business. The psychological insight into marketing, along with detailed and practical suggestions, made the guidance not only valuable but also inspiring. I recommend Menteli!

September 2025

Ekaterina M.

Entrepreneur, Finland

“Olia demonstrated a solid understanding of marketing principles, campaign planning and execution and exhibited strong analytical and problem-solving skills. Her proficiency in using online marketing tools [...] was impressive and contributed significantly to our campaign objectives. Additionally, she displayed excellent communication and teamwork abilities. Her performance reflected a high level of professionalism.”

May 2024

Topornikov S.

Commercial DirectorReal Estate Agency "PIA Real Estate"

For nearly two years our agency cooperated with the marketing agency headed by Olga Lange. During this period, we received not only professional support but also a non-standard, creative approach that delivered tangible, practical results.We would especially like to highlight the effective work on segmenting target audiences [...]. In addition to digital channels, the agency offered a number of original and economically efficient offline solutions. For example, the “Horrors of a Real Estate Buyer” brochures [...]. This approach proved to be a simple and effective way to build an emotional connection with the local community.Working with Olga Lange has always been a combination of professionalism, reliability, and genuine engagement. We confidently recommend her as a specialist with whom it is both pleasant and productive to cooperate.

October 2017

Nikita P.

SSL Group

HR brand service.“You definitely know your stuff! We recruit 10 logisticians per month now, whereas before, we were recruiting just one per year—and they weren’t really up to standard. We’d love to work exclusively with you!”

December 2020

Jakob S.

Art Gallery

“I like the way you work! Take my friend as a client. Can I give him your contacts?”

January 2021

Maksim D.

Big Bag

“We were pleased to cooperate with you! It's great to choose a brand style from options you like, rather than picking the best from those you don't.”

June 2018