Top 7 AI Voice Models for Phone Agents (Retell, Vapi, & More)
HighLevel vs Synthflow
The honest breakdown. Why agencies are switching from Synthflow to HighLevel.
WINNER
HighLevel
The All-In-One AgencyOS
Unlimited Everything
Unlimited sub-accounts, users, and contacts for one flat fee.
White-Labeling
Rebrand the entire platform and resell it to your clients.
Integrated Features
CRM + Email + SMS + Funnels + Booking in one place.
Synthflow
The Specialised Tool
A no-code wrapper for voice AI. Good for beginners who don’t want to touch APIs, but HighLevel native is smoother.
Key Limitations
- Often requires expensive integrations (Zapier).
- Per-user or per-contact pricing models.
- No native white-labeling capability.