SUCCESS STORY

How Doctolib uses Brevo to deliver 75 million transactional emails a month

Leveraging Brevo's reliable API, Doctolib was able to optimize its transactional emails significantly. This case study reveals the strategies deployed to improve deliverability, strengthen data security, and deliver a flawless user experience.

99% deliverability rate
95% of emails delivered in under 5 seconds
75M emails sent per month

About Doctolib

Founded in 2013 with one ambition — building the healthcare system we all dream of — Doctolib has grown into Europe's leading health tech platform. Using innovative technologies, the company improves the day-to-day lives of healthcare professionals and makes it easier for patients to access care securely.

2,900 employees in France, Germany, Italy and the Netherlands
> 1 million professional users
30 million teleconsultations carried out
7 billion documents shared in total security

The challenge

Transactional emails at healthcare scale

As Doctolib's user base grew, so did the volume and criticality of its transactional communications. Appointment reminders, teleconsultation alerts, verification codes, account notifications, these emails aren't marketing. They're part of the care experience. A bounce or a delay has real consequences.Doctolib needed a technology partner that could meet three non-negotiable requirements: reach 99% deliverability at scale, process high-priority emails in under 600ms, and comply with the security standards of the healthcare sector — GDPR, European data hosting, and full traceability.

Why Brevo?

A European provider built for volume

Capable of processing up to 130 million emails per month and millions of simultaneous API calls without degraded performance during peak periods.

GDPR compliance and healthcare-grade security

Health data hosted and encrypted within the EU, with certified infrastructure and strict access controls ensuring sensitive information.

Responsive 24/7 support

Not just a ticket system, but a true partnership model with dedicated account management, monthly business reviews, and escalation processes for critical incidents.

How it works?

Brevo's API at the core of Doctolib's communications

Doctolib uses Brevo's public API to send all its transactional emails. The integration is straightforward by design: Doctolib sends parameters and email content via the API, and Brevo handles creation, management, and dispatch — guaranteeing fast, secure delivery at every step.

The result

95% of emails are delivered in under 5 seconds.

The infrastructure behind this performance combines dedicated Mail Transport Agent (MTA) processing with Brevo's public IP infrastructure, secured specifically for Doctolib's usage and compliant with GDPR at every stage of the sending chain. Real-time webhooks give Doctolib instant visibility into what's been sent and received, while dedicated monitoring flags incidents before they escalate — with optimized resolution times when they do.

Brevo's API at the core of Doctolib's communications

4 use cases that make a difference

Appointment reminders

Automated reminder emails sent before consultations significantly reduce no-shows, freeing up valuable medical time and improving the efficiency of healthcare professionals. Every reminder is personalized, timely, and reliably delivered.

Account verification

When a patient or practitioner logs in from an unknown device, a one-time verification code needs to arrive in seconds — not minutes. Brevo's API handles these high-priority sends with a processing time of 600ms, ensuring fast and seamless access to care with no friction.

Teleconsultation alerts

Before each video consultation, Doctolib sends pre-consultation emails prompting patients to test their equipment (webcam, microphone) and prepare the session. These alerts reduce technical interruptions and ensure smoother, stress-free teleconsultations for both sides.

Account management

From email address updates to account modifications, Doctolib uses precise transactional emails to keep patients and practitioners informed of any change to their account — guaranteeing a consistent and secure experience throughout.

The partnership model

What makes the Brevo x Doctolib relationship work isn't just the technology, it's how both teams operate together.

Relationship strengthening — Monthly meetings to review key figures and Brevo product updates, with daily resolution of operational issues when they arise.
Volume anticipation — Regular follow-up on shared objectives and an annual contract structured to accommodate Doctolib's delivery seasonality.
Service quality focused on performance — A monthly monitoring dashboard and an API-based alert system that triggers immediately in case of incidents, ensuring nothing falls through the cracks.