Zendesk vs Intercom! Using Competitor's Name for Brand Awareness.

Can you identify revenue figure of Zendesk & Intercom? [2021]
Brand 1: 20 Crore USD
Brand 2: 134 Crore USD

Using competitor's name is common practice in B2C ads. They are effective strategy for challenger brand shaking market share of leader. It's interesting if it works in SAAS.