SUCCESS STORY
How Vaillant Group secures and scales its transactional communications with Brevo
By structuring its usage into sub-accounts, Vaillant Group aligned IT governance, GDPR compliance, and sending performance — without slowing down engineering teams.
Results obtained with Brevo
Sector : Heating, ventilation, and air conditioning (HVAC)
Region : Europe (Nordics)
Product: Email API (transactional)
About Vaillant Group
Vaillant Group designs and markets heating, cooling, and hot water solutions for homes and buildings in Europe. Present in several markets (including the Nordics), the group operates with teams and applications that have distinct technical needs, making communications and access governance particularly critical.
The challenge
When a single account becomes a risk (and a bottleneck)
As an international group, Vaillant operates multiple applications across different European markets. Historically, all these applications and the associated development teams shared a single environment for their transactional mailings. This centralization created three major risks for their infrastructure:- A security and compliance risk: Impossible to partition user data according to the principle of least privilege, a key GDPR requirement.
- An operational risk: Shared access increased the probability of accidental changes impacting other countries or applications.
- A performance risk: A shared API quota where a load peak from one application could create bottlenecks for all others.
The solution
Distributed governance, centralized control
To meet these Enterprise-level requirements, Vaillant Group's teams (led by Engineering) restructured their approach using Brevo's Sub-accounts feature. Rather than funneling everything through a single pipe, Vaillant deployed 15 distinct working environments (sub-accounts). Each application and region now has its own separate space.What the multi-account architecture changed
- One sub-account per application/team/market
- More granular access rights
- Better separation of usage and configurations
The impact
Autonomous teams, smoother compliance
By switching to a sub-account architecture, Vaillant Group partitioned its environments to reflect the reality of its applications, teams, and markets. Access is easier to manage and more secure, with permissions better controlled within the right scope.What Vaillant Group gained
- Clear partitioning of usage and data by application / market
- More granular access management to limit risks
- More predictable API capacity, without bottlenecks related to a single account
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