Synthflow
No-code voice agent builder for sales and support — pay-per-minute, no monthly minimum
Overall score
About
Synthflow is a no-code voice AI agent builder aimed at agencies, sales teams, and SMBs that want voice agents without writing code. Build agents in a visual flow editor, deploy on inbound numbers, route through Cal.com or HubSpot. Pricing is pay-as-you-go with no platform floor on the entry tier — you only pay for the calls you make.
Best for: Agencies running outbound for client books, SMB sales teams that want booking and qualification without devs, and customer-ops teams adding inbound voice answering. The no-code builder is the differentiator — pick Synthflow if your team can't write API code.
Pricing
Pay-as-you-go
- Monthly
- Free
- Annual /mo
- Free
- Billing
- usage
- Notes
- Free account creation;Voice engine: $0.09/min;LLM: $0.02-$0.05/min depending on model;Telephony: $0.02/min (Synthflow-managed) or $0/min (BYO Twilio);5 concurrent calls included;Additional concurrency: $20/unit/mo;SOC 2;GDPR;ISO 27001 · Most common combined cost is $0.15-$0.24/min. No platform fee — you only pay for usage.
Enterprise
- Monthly
- n/a
- Annual /mo
- n/a
- Billing
- flat
- Notes
- Starts at 10,000 minutes/month;Unlimited concurrent calls;HIPAA;Advanced compliance features;99.99% uptime SLA · Contact sales — minutes-based custom pricing.
| Tier | Monthly | Annual /mo | Billing | Notes |
|---|---|---|---|---|
| Pay-as-you-go | Free | Free | usage | Free account creation;Voice engine: $0.09/min;LLM: $0.02-$0.05/min depending on model;Telephony: $0.02/min (Synthflow-managed) or $0/min (BYO Twilio);5 concurrent calls included;Additional concurrency: $20/unit/mo;SOC 2;GDPR;ISO 27001 · Most common combined cost is $0.15-$0.24/min. No platform fee — you only pay for usage. |
| Enterprise | n/a | n/a | flat | Starts at 10,000 minutes/month;Unlimited concurrent calls;HIPAA;Advanced compliance features;99.99% uptime SLA · Contact sales — minutes-based custom pricing. |
Key features
- No-code visual agent builder
- Pay-as-you-go with no platform floor
- SOC 2 and GDPR included on entry tier
- BYO Twilio option for cheaper telephony
- 5 concurrent calls included
- Cal.com booking and GoHighLevel integration
- Public API and Zapier app
- ISO 27001 certified
Integrations
Trust & compliance
- Stage range
- Solopreneur → Seed
- Founded
- 2023
- Status
- active
- SOC 2
- yes
- GDPR
- yes
- Data residency
- unknown
- External rating
- n/a
- Last verified
- Jun 2026
Reviews
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