Redial vs Vapi et al.

Infrastructure vs Assistant

Vapi/etc build assistants for front offices. Vapi helps businesses build rigid, agentic AI phone assistants. They take a middle of the road approach with their platform that’s neither no-code nor developer friendly.
Redial builds infrastructure. Redial enables agentic apps to place AI phone calls, customized per user, per request. We are developer first.
The difference in our approach is akin to Resend vs Mailchimp, or Flask vs Django.

Use Case	Vapi et al.	Redial
Singleton Integrations
(One calendar, email, etc)	✅ Built in	🟨 With tool calling
Call-center use
(e.g. one business w one shared calendar, one type of task, etc)	✅ Well-matched	✅ Works just as well
Thousands of users, each with their own data, apps, accounts, integrations	❌ Complicated and brittle	✅ Built for this
Auto Prompt Enhancement	❌ Unavailable	✅ Easy
Customization per call,
Dynamic Context	⚠️ Hacky, limited, difficult	✅ Easy
Time to First Call in Code	⚠️ 30+ minutes	✅ 3 minutes
Conversation Flow	⚠️ Platform setup required	✅ Set up in code in plain text,
or auto-generated based on context

Singleton Integrations
- Vapi assistants can natively only handle one set of integrations (e.g., the business’s calendar, the business’s email system).
- This breaks down when apps need per-user integrations for thousands of users.
Static Assistants
- Assistants are rigid and configured much ahead of time.
- Even small tweaks (e.g., personalizing with a user’s name or context) require complicated workarounds on the developer’s part.
Heavy Developer Overhead
- Developers must build extra backend infrastructure to pass even basic data and context into calls.
- Developers must use their platform to tweak assistants or conversation flows.
Quality Requires Manual Effort
1. Developers must use one of the platform’s templates, drag-and-drop flows, or carefully study and construct their own.

Per-User Integration
- Redial make it easy to let developers build per-user integrations.
- Redial offers an easy tool calling integration. Upon developer specified conditions LLMs can trigger a GET request from Redial to their own backend.
- These requests to the app’s backend can do user-integrations or customize LLM response, e.g. schedule an event on the user’s calendar, provide their availability, etc.