Synthflow AI
by Synthflow · Berlin, Germany · Founded 2023
No-code builder for custom phone agents
Overview
Synthflow sits between the turnkey receptionists and the developer platforms: a no-code builder where you design the agent's conversation, actions and integrations yourself, then deploy it on a phone number. That flexibility suits businesses whose call handling does not fit a packaged product, and agencies building receptionists for clients under their own brand. It handles inbound and outbound, integrates broadly through webhooks and native connectors, and publishes pricing. The trade is that you are building a receptionist rather than buying one — expect configuration work, and expect a rougher result than Rosie or Slang.ai deliver out of the box.
Our verdict
The right choice when no packaged receptionist fits your call flow, and a strong agency platform thanks to white-labelling and GoHighLevel integration. You are building rather than buying, so budget configuration time and expect a rougher first version than a turnkey product.
Best for
Agencies and businesses whose call handling does not fit a packaged receptionist product.
Avoid if
You want something that works on day one with no configuration.
Pros
- Genuine no-code builder with broad integration options
- White-label and GoHighLevel support for agencies
- Free tier and published pricing from $29/mo
Cons
- You build the receptionist rather than buying one
- Out-of-the-box quality below turnkey specialists
- Per-minute costs add up on high call volume
Key capabilities
Frequently asked questions
Is Synthflow a receptionist or a builder?
A builder. You design the agent's conversation, actions and integrations yourself, then deploy it on a phone number. That is more flexible than a packaged receptionist but requires configuration work.
How much does Synthflow cost?
There is a free tier with limited minutes, and paid plans from around $29 per month scaling by call minutes. Terms are monthly.
Can agencies white-label Synthflow?
Yes. White-label deployment plus native GoHighLevel integration make it a common choice for agencies building branded voice agents for their own clients.