The useful read
hub vs hub
┌─ generated from funding, org, model, compute, and overlap signals ─────────────────────────────── ┐
Toronto concentrates more capital; Boston has the wider org bench.
Boston's biggest carrier is OpenEvidence: $700M (34.6% of tracked side funding). Toronto's biggest carrier is Cohere: $1.6B (38.7% of tracked side funding).
The org treemap is shown because both sides have enough funded orgs for area to mean something.
Funding is HQ-based and limited to AI-native orgs. Compute is counted by datacenter location, so it can disagree with headquarters funding.