Nikita Vershinin VP of Engineering at Ankorstore

5.0★

Software Development Review from Nikita Vershinin

We've partnered with Sigma Software for almost three years, and they proved to be a strong partner with whom we'll keep working. Their adaptability and willingness to get things done are unique, settingthem apart from other providers. Moreover, they demonstrate a strong sense of ownership.

Michael Meyer Managing director at trendwaerts GmbH

5.0★

Software Development Review from Michael Meyer

We were so positively surpised and happy about Sigmas services - as usual I might add. It is a pleasure working with their software engineers. After we provided a briefing, the effort estimation came right away. Shortly after the project started we could see first tangible results. The code quality was excellent and comprehensive. Minor feedback was implemented right away. What can I say more: 10 out of 10 points!

Esther Howard Founder / CEO at Bezyl

5.0★

Mobile App Development Review from Esther Howard

The client is incredibly happy with Sigma's services and work. It has referred 3 other clients who also say how much they really love the team and process to get set up with the agency. Sigma is a fantastic company with excellent experienced professionals. Its experts care about quality and customer satisfaction, and they operate like the internal team's extension. (Verified via email)

Helen Guzenko Partnership Manager at Wezom

5.0★

Startup Review from Helen Guzenko

Wezom is an enterprise software development company with more than 275 specialists. We brought RGray in for startup marketing and growth marketing for a FinTech SaaS platform we had built for a client, an early stage startup with a finished product and almost no market presence. RGray started with their startup marketing foundation: market and competitor research, positioning and messaging, and a growth strategy built on three prioritized hypotheses, each with its own funnel and success metrics. They then implemented the channels: SEO, GEO for visibility inside AI search and AI assistants, PR and digital media, and paid user acquisition to test the funnels fast. Analytics and attribution were in place from the start.They also built AI into the daily marketing work: a custom multi agent system using Claude, Grok, Perplexity and Gemini for research, content production and localization, handed over with workflows, prompts and checklists. Two of the three hypotheses proved out, so we elaborated those two and their funnels. CAC started at $31 and fell to $16 by the end of the test campaign, below the industry average. The campaign brought around 2,500 activated users, which boosted revenue and gave us real data for funnel, user and product analysis. The client finished with a working acquisition system and the documentation to run it, not a set of campaigns. Project management was on time and on budget: weekly calls, a shared board with owners and deadlines, monthly reporting against the strategy metrics, same day answers. When our client's roadmap moved, they resequenced the plan in days. Most impressive: they think like product owners, not like a service agency, and they challenged our ICP and pricing assumptions correctly. One improvement: the early reports were denser than we needed, and they added an executive summary once we asked.

Irena Bulka Account Manager at Grono Corporate

5.0★

Small Businesses Website Development Review from Irena Bulka

We collaborated with 5Hz on the development of a corporate website for our custom Christmas ornament business, and overall, the experience was very positive.Our main goal was to create a modern, user-friendly website that would clearly present our brand, services, and values. The 5Hz team handled the full development cycle, including business analysis, requirements clarification, UX/UI design, development, and technical implementation. As a result, we received a fully functional website with a clear structure, responsive design across different devices, and an easy-to-manage content system. They also supported the testing, launch, and post-launch stages, ensuring everything worked smoothly.The project was delivered on time and according to the agreed scope. The new website significantly improved our online presence: it clearly reflects our brand positioning, is intuitive for users, and provides a better overall experience. It also helped streamline communication with potential clients and partners by making information more structured and accessible.From a technical standpoint, the website is stable, performs reliably across devices and browsers, and is easy for our team to update without сложности. This gives us a strong foundation for further digital growth.We also appreciated their professional approach to project management. Communication was smooth and efficient throughout the process via virtual meetings, email, and messaging apps.Overall, we are very satisfied with the collaboration and have no areas for improvement to highlight.