kitio.aiRetell AI vs Synthflow
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Retell AI starts at See pricing page and Synthflow starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Voice agent builder
- Telephony and SIP support
- Function calling
- Call analytics
- Batch outbound calls
- No-code voice agent builder
- Built-in telephony
- Calendar and CRM integrations
- White-label for agencies
- Call analytics
| Feature | Retell AI | Synthflow |
|---|---|---|
| Best for | Platform for building and running AI phone agents for call centers | No-code builder for AI voice agents in call centers and BPOs |
| Category | Customer support | Customer support |
| Pricing model | Free trial | Free trial |
| Starting price | See pricing page | See pricing page |
| Free plan | No, trial available | No, trial available |
| Made by | Retell AI | Synthflow AI |
| Based in | United States | Germany |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Both offer: Call analytics.
Pricing compared
Retell AI starts at See pricing page and Synthflow starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
2 plans
Pay as you go
$0.07-$0.31 / min
- $10 in free credits
- Chat agents from $0.002/msg
- Call analytics and transcripts
- Simulation testing
Enterprise
Custom
- Custom MSA/DPA terms
- Role-based access control
- Custom SSO
- PII removal
1 plan
Enterprise
From $30,000/yr
- Scoped by call volume and concurrency
- Native telephony or SIP trunking
- Enterprise SLA and security review
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Retell AI
- Low latency voice calls
- Flexible API and builder
- Usage-based pricing
- Costs vary with model choice
- Needs tuning for complex flows
- Less suited to non-technical teams
Synthflow
- No coding needed
- Agency white-label option
- Fast to launch simple agents
- Less control than API platforms
- Costs rise with concurrency
- Complex flows get unwieldy
Which one should you choose?
Choose Retell AI if you want:
- Low latency voice calls
- Flexible API and builder
- Usage-based pricing
Watch out: costs vary with model choice.
Choose Synthflow if you want:
- No coding needed
- Agency white-label option
- Fast to launch simple agents
Watch out: less control than api platforms.
Retell AI vs Synthflow FAQ
What is the difference between Retell AI and Synthflow?
Retell AI: Platform for building and running AI phone agents for call centers. Synthflow: No-code builder for AI voice agents in call centers and BPOs. Both are customer support tools.
Is Retell AI or Synthflow cheaper?
Retell AI starts at See pricing page and Synthflow starts at See pricing page. Check both pricing pages for current plans.
Do Retell AI and Synthflow have free plans?
Retell AI: No, trial available. Synthflow: No, trial available.
Who makes Retell AI?
Retell AI is made by Retell AI, based in United States.
Who makes Synthflow?
Synthflow is made by Synthflow AI, based in Germany.
Which should I choose, Retell AI or Synthflow?
Choose Retell AI if you value low latency voice calls and flexible api and builder. Choose Synthflow if you value no coding needed and agency white-label option.