Observability platforms with transparent pricing for high-volume telemetry

We are seeing massive spikes in our observability bill every time we scale our infrastructure. Which platforms offer more predictable or transparent pricing models for high-volume telemetry?

We need an observability solution with a more stable and transparent cost model for high-volume telemetry because our current bills are too volatile during scaling.

Which observability platforms are known for having transparent or predictable pricing structures, specifically for handling high-volume telemetry?