Ilek improves cloud efficiency and achieves 33% savings with Opsima’s continuous optimization

What does the company do?

Ilek is a leading French supplier of 100% renewable electricity and gas, connecting households and small businesses directly with local producers of solar, wind, hydro, and biogas energy. With a strong commitment to transparency and sustainability, Ilek has built a reputation as a mission-driven energy retailer and was one of the first in the sector to earn B Corp certification in France. Its digital platform plays a central role in ensuring reliable delivery, real-time customer engagement, and scalable growth across France.

What were the cloud challenges?

As a cloud-native company supporting a fast-growing customer base, Ilek had already established a well-structured approach to AWS cost management. They were using Reserved Instances and EC2 Savings Plans to secure meaningful savings while keeping operations predictable.

However, because their internal process operated on a yearly review cycle, some optimization opportunities remained out of reach. Usage patterns naturally evolved throughout the year, but the annual cadence made it difficult to adjust commitments in step with these changes without creating unnecessary risk.

To stay conservative and flexible, Ilek maintained commitment coverage around 83%, striking a balanced approach that delivered solid results but left room to optimize further. Their Net Savings Rate (NSR) was a healthy 28%, yet the team recognized that greater savings were possible if they could refine commitments more often without increasing operational overhead or risk.

What did Opsima do for them?

Ilek partnered with Opsima to augment their existing strategy with continuous, automated optimization, ensuring their cloud commitments evolved at the same pace as their platform and customer traffic.

• From annual cycles to real-time optimization
  Opsima introduced dynamic adjustments based on weekly usage trends. Instead of a single annual moment to reshape commitments, Ilek now benefits from a system that monitors and optimizes continuously, identifying and executing actions the moment additional efficiencies are available.
  
  
• Full coverage with flexibility preserved
  Thanks to Opsima’s optimized mix of Savings Plans and RIs, including varied terms and convertible instruments, Ilek’s coverage increased from 83% to nearly 100% without compromising agility. The company retains the ability to adapt to shifting workloads, while the platform automatically ensures the commitments remain aligned with real usage.
  
  
• A fully outsourced, low-effort model
  The optimization workflow is now entirely handled by Opsima. Ilek’s teams no longer need to conduct analyses or manually adjust their strategy. What previously required periodic planning and review is now fully automated, saving an estimated 1 hour per week across finance and engineering, and eliminating the cognitive load associated with cloud cost forecasting.
  
  

What are the outcomes for the company?

The transition to Opsima’s automated model produced measurable financial and operational benefits:

• NSR increased from 28% to 33%, delivering stronger cloud savings without requiring changes to the underlying architecture.
  
  
• Coverage reached close to 100%, ensuring all steady-state workloads benefit from discounted rates while maintaining the flexibility Ilek needs for ongoing product evolution.
  
  
• Risk-free optimization became part of Ilek’s continuous operations. No overcommitment concerns, no manual oversight, and no effort required from internal teams.
  
  
• Time savings and peace of mind were immediate: the team regained focus for higher-value initiatives, confident that their cloud spend is continuously optimized in the background.
  
  

Opsima didn’t replace Ilek’s existing approach; it simply enhanced it, unlocking the additional value that continuous optimization can create for organizations already operating with strong FinOps principles. Today, Ilek benefits from a hands-off, always-on optimization model that ensures every possible saving is captured automatically.

About Opsima

Opsima automates AWS commitment management to save businesses time and money. We use proprietary algorithms embedding FinOps best practices to optimize Reserved Instances and Savings Plans. With over 250 satisfied clients, Opsima delivers up to 40% cost savings through fully automated cloud optimization without technical trade-offs.