TIER Mobility expands its offering by selling refurbished e-scooters from its own fleet (TIER Mobility alkaa myydä käytettyjä sähköpotkulautoja Saksassa – hinta 699 euroa) | TIER Mobility
Tier, the Berlin-based scooter rental startup, raises €25M as European e- scooter market heats up | TechCrunch
TIER Unveils TIER 6 e-Scooter in Europe | Future Transport-News
Battle of the European e-scooter startups: Dott, Tier, Voi, Wind | EU-Startups