enercity success story: 23.3% more sales in just four months

Short overview of enercity:

enercity is one of Germany’s largest municipal energy providers, employing more than 3,500 people. The company supplies around one million people with electricity, heating, and drinking water, while also offering a wide range of energy-related services. These include electromobility, decentralized energy generation, energy efficiency solutions, telecommunications, and smart infrastructure.

With a strong focus on sustainability and innovation, enercity is committed to supporting customers on their journey toward climate neutrality.

Limited transparency and the ambition to improve efficiency

enercity’s marketing team manages paid campaigns across five different channels, including Google Ads, Meta, DV360, Bing, and TikTok. With significant budgets invested in performance marketing, continuously optimizing these cross-channel campaigns is essential. However, optimizing campaigns across multiple platforms was time-consuming and difficult to manage efficiently.

Amy Wilpert, SEA and SEO Manager at enercity, knew that dynamic optimization was key to improving performance. At the same time, the team was looking for a smarter way to manage their growing advertising portfolio. Their goal was to automate optimization processes, reduce manual work, and gain greater transparency into performance across channels, especially when it came to understanding and improving their cost per acquisition (CPA).

“We manage several channels simultaneously, and each platform provides its own data and optimization logic,” explains Amy Wilpert, SEA and SEO Manager at enercity. “Bringing all of this together to understand where we could improve performance and lower our acquisition costs was both time-consuming and complex.”

The team wanted to rely less on assumptions and manual adjustments, and instead adopt a more data-driven approach to optimize their acquisition costs.

When enercity discovered Nexoya, they realized the platform could help solve these challenges.

Smooth onboarding and a strong start to the collaboration

The collaboration began with a seamless onboarding experience. During the first meeting, enercity was assigned a dedicated Customer Success Manager who supported the team throughout the setup process and was available to answer any questions along the way.

All relevant marketing channels were integrated quickly, allowing the team to start working with the platform within a short time. enercity’s agency partner was also smoothly onboarded, ensuring that everyone involved in campaign management could collaborate efficiently from the start.

With the support of Nexoya’s Customer Success team, a tailored portfolio was set up to match enercity’s main objective: optimizing campaigns toward their target cost per acquisition.

Reaping the rewards. Significant performance uplift and automated optimization

+23.3% increase in sales within four months

One of the most impressive outcomes of the collaboration was the significant performance improvement. Within just four months, enercity achieved a 23.3% increase in sales thanks to Nexoya’s AI-powered optimization.

By dynamically allocating budgets across channels, the platform continuously identified the most efficient opportunities for investment. The algorithm automatically adapted to seasonal fluctuations and changing market conditions, ensuring that budget was always directed toward the channels and campaigns delivering the strongest results.

“The +23.3% increase in purchases clearly shows that automation with Nexoya not only saves time but also drives measurable growth,”

Amy Wilpert, SEA and SEO Manager at enercity.

Maintaining target CPA while increasing sales

While sales increased significantly, enercity also managed to maintain strong cost efficiency. Despite the higher sales volume, the team successfully kept their cost per acquisition at the desired target level and in some cases even lowered it further.
As a result, with Nexoya’s AI continuously optimizing the campaign portfolio, the team was able to scale performance without sacrificing efficiency.
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Automated optimization that saves valuable time

Another major benefit for the marketing team was the reduction of manual work. Previously, optimizing campaigns across multiple platforms required time-consuming and often repetitive adjustments.
With Nexoya automating cross-channel budget allocation and optimization, the team could rely on data-driven recommendations and dynamic budget adjustments instead of manual intervention. This allowed them to react faster to market developments and seasonal changes while freeing up valuable time for strategic tasks.

“With Nexoya, we automated time-consuming manual tasks, saving several hours each week. Today, we can focus on strategic testing and forward-looking planning – with clearly measurable results.”

Maike Schack, Produktmarketing Manager at enercity

Full transparency and a holistic cross-channel view

Beyond performance improvements and efficiency gains, enercity also benefited from greater transparency across their marketing activities. Instead of working with multiple reports from individual advertising platforms, the team could now monitor performance across all channels in one place.

This unified view allowed them to closely track key metrics such as CPA while also gaining deeper insights into performance across the entire marketing funnel.

enercity also leveraged Nexoya’s Events feature to further improve optimization accuracy. By adding important business events such as price changes as an input to the optimization, the algorithm could better understand how these factors influenced campaign performance. Over time, the system learned how such events affected results and adjusted optimization strategies accordingly, enabling even more precise budget allocation during critical periods.

Key benefits for enercity:

• +23.3% increase in sales within four months, driven by dynamic cross-channel optimization
• Lower cost per acquisition, consistently meeting and sometimes outperforming the target CPA
• Holistic performance overview across all advertising channels in a single platform
• High prediction accuracy, reaching 90% for sales predictions and 95% overall
• Smooth collaboration across teams and stakeholders

“Overall, Nexoya didn’t just save us time through automation – it also grew our sales by 23%, all while keeping acquisition costs right where we needed them. The platform made sure we were always investing smartly, shifting budgets dynamically based on performance, patterns, and seasonality.”

Oliver König, Head of Digital Sales

Future outlook

Following the strong results achieved so far, enercity is looking forward to continuing the collaboration with Nexoya. Building on the success of AI-driven optimization, the team is also exploring additional platform capabilities to further enhance their marketing strategy.

In particular, enercity is interested in testing Nexoya’s attribution feature, to gain even deeper insights into how different channels contribute to conversions and overall performance.

With a strong foundation in place and measurable results already achieved, the team is excited to further develop the partnership and continue driving data-driven marketing success together.