Synthflow vs Vapi
Two of the most-asked-about agents in the voice-agents space. Here's how they actually stack up.
Synthflow
No-code voice agent builder with pre-built templates for receptionists, sales, and lead qualification
From $29/mo
Read full review →Vapi
Developer-focused voice AI platform for building production-grade voice agents via API
Free tier
Read full review →Side-by-side comparison
| Synthflow | Vapi | |
|---|---|---|
| Tagline | No-code voice agent builder with pre-built templates for receptionists, sales, and lead qualification | Developer-focused voice AI platform for building production-grade voice agents via API |
| Pricing | From $29/mo | Free tier |
| Categories | voice-agents, no-code | voice-agents, api, conversational-ai |
| Made by | Synthflow AI | Vapi |
| Launched | 2023 | 2022 |
| Platforms | Web, Phone | API, Web, Phone |
| Status | active | active |
Synthflow highlights
- + Visual drag-and-drop agent builder with no coding required
- + Pre-built templates for AI receptionist, outbound sales caller, and lead qualifier roles
- + Phone number provisioning included at Pro and above tiers
- + CRM integrations with HubSpot, Salesforce, and GoHighLevel out of the box
- + Calendar integration for real-time appointment scheduling during calls
Vapi highlights
- + Real-time streaming voice with sub-500ms response latency on most configurations
- + Bring your own LLM: works with OpenAI, Anthropic, Groq, Together, and local models
- + Bring your own STT and TTS providers including Deepgram, ElevenLabs, and Play.ht
- + Phone number provisioning and outbound/inbound call management via API
- + Function calling and tool use for external integrations mid-conversation
Frequently Asked Questions
Which is better, Synthflow or Vapi?
Neither is universally better. Synthflow (From $29/mo) leans into voice-agents, while Vapi (Free tier) is closer to voice-agents. Pick based on which workflow you actually do every day.
What is the price difference between Synthflow and Vapi?
Synthflow is from $29/mo. Vapi is free tier. See the pricing row in the comparison table.
Can I use Synthflow and Vapi together?
In most cases, yes. They serve overlapping but distinct needs, so running them side by side is common until you decide which fits your workflow.