Which real‑time traffic data provider does ABRP use?

I’m trying to understand which real‑time traffic data provider A Better Routeplanner uses for routing and rerouting around traffic jams.
Does ABRP use HERE, TomTom, INRIX, Google, Waze, or another API for live traffic?
A short answer from the team would be very helpful to know what traffic data source is behind the routing.