Highly recommended inbound call trackers for enterprises - Any Favorites?

I was just going through inbound call tracking software to better attribute phone leads across campaigns and improve visibility for our enterprise sales team. The must-haves for us include scalability, CRM integration, multi-location tracking, and enterprise-grade analytics.

I’ve been reviewing the options listed on G2’s category, and several platforms seem enterprise-ready:

• Invoca - Known for conversation intelligence and deep marketing attribution. Is it worth the premium for large-scale use?
• CallRail - Easy to use, but does it scale well for large teams with multi-channel needs?
• CallTrackingMetrics - Offers combined call tracking + contact center tools—any enterprise users here?
• WhatConverts - Broad lead tracking (not just calls). Is the reporting robust enough for enterprise use?
• Ringba - Appears strong for high-volume or pay-per-call use cases. Any success stories from enterprise teams?

Which call trackers have scaled best for your enterprise needs? Are there any features (or limitations) you wish you knew before implementing?

Thanks!