All comparisons
Stellar vs Vapi
Vapi is voice AI infrastructure for developers. It provides the building blocks (telephony, STT, LLM, TTS) but requires engineering to assemble them into business workflows. Stellar is built on top of Vapi's infrastructure with a complete no-code layer.
Feature
Stellar
Vapi
Target User
Business users (no-code)
Developers (API-first)
Pre-Built Templates
3 business workflow templates
None. Raw infrastructure
Knowledge Base
Built-in upload + auto-embed
Custom RAG integration
Calendar Booking
Native Google Calendar integration
Build your own
Self-Learning
Automatic prompt improvement
Manual iteration
Compliance
Built-in TCPA + GDPR
You handle compliance
Analytics
Dashboard + AI insights
Raw webhook data
Pricing
Subscription + per-minute
Per-minute infrastructure
Where Stellar wins
- No engineering needed. Live in minutes
- Business-ready templates and workflows
- Built-in compliance, analytics, and CRM
- Self-improving agents reduce manual tuning
Where Vapi wins
- More flexibility for custom voice applications
- Lower-level infrastructure access
- Wider model and provider selection
- Better for developers building voice products
Try Stellar free
See the difference for yourself. No credit card required.