Ultra-high-speed broadband at the core of the regions

Terralpha, a subsidiary of SNCF Réseau, sovereign infrastructure operator

We operate a secure, ultra-high-speed, ultra-low-latency telecoms network deployed along railway lines, offering operators, businesses and public sector bodies reliable, high-performance data transport services of up to 800Gbps throughout France. This unique rail location is a strategic asset, enabling critical flows to be secured via alternative routes, thus contributing to sovereign connectivity.

We also provide Digital Dalles, land ready to host data centres as close as possible to local needs, reducing latency while optimising energy efficiency.

Terralpha offers

Wave

TerraWave - Illuminated fibre

Fast, secure, multi-protocol dedicated connectivity solution between two points on our photonic network

Spectre

TerraSpectrum - Amplified FON

Neutral and transparent data transport solution for your optical signals through our photonic network

DN

TerraPoP - Accommodation

Solutions for hosting local data centres on our prepared sites or space in our shelters for your equipment

The Terralpha network

With an optical network spanning more than 20,000 km and 6,000 municipalities, Terralpha is helping to reduce the digital divide by deploying ultra-high-speed points of presence in the heart of the country.

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Our latest news

22 Jul 2026
news-terralpha

Résilience des infrastructures WDM : Comment garantir une continuité de service en toutes circonstances ?

Dans un contexte où les entreprises dépendent de plus en plus de la disponibilité permanente de l...
3 Jul 2026
news-terralpha

Terralpha décroche la médaille d’argent EcoVadis 2025 et franchit un nouveau cap dans sa démarche RSE

Avec un percentile de 93, Terralpha figure désormais parmi les 7 % des entreprises les mieux éval...
15 Jun 2026
events

Terralpha à VivaTech 2026 : la souveraineté du transport de la donnée au cœur de l’innovation

Terralpha participera à VivaTech, le plus grand salon tech d'Europe !

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