There are 6 tiers:
- Tier 0: Basic (<1,000 messages/month)
- Tier 1: Starter (1,000-10,000 messages/month)
- Tier 2: Growth (10,000-50,000 messages/month)
- Tier 3: Pro (50,000-250,000 messages/month)
- Tier 4: Enterprise (250,000+ messages/month)
- Tier 5: VIP (Custom/Strategic partnerships)