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VAPI

First met in aicp-c3-basecamp-06 · Voice

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A developer-first voice agent platform — the same job as Retell, aimed at people comfortable in code.

Pick this when

You're a developer who wants API-level control over the call pipeline more than a friendly builder UI.

What makes it different

Developer-oriented surface where Retell is UI-oriented

Near feature parity with Retell on the fundamentals

What it does

Builds and runs voice agents with LLM, voice and function wiring

What it does not do

Common wrong expectations

Doesn't match Retell's tuning UI, which is why the trainer prefers Retell

Where it sits in a stack

The same voice-agent seat as Retell; pick on interface preference.

Shelf

Voice

Our status · not-using

No voice use case.

For your projects

None.

Freshness

current

Related tools

competes withRetell AI

retell-ai: near-identical; the choice is developer-first vs builder-first

Every moment the course touched it (11)

SessionCoverageMomentWhat happened
Day 3: Markdown Prompting, Content DNA and Skills, MCP Everywhere (Vapi Call, Zomato, Apify), Goose and Local Models, a Voice Agent, and the Full n8n Customer-Support BuilddemonstratedMCP phone call; voice agent build
Day 2: Custom GPTs and Gems, Markdown Prompting, Cloning Your Writing Style, MCP in Daily Use, a Vibe-Coded Calorie Counter, and the Consultant-to-SaaS RoaddemonstratedVoice agent; MCP phone call
Day 12: MCP Ultra-Hard Mode — Editing the Config Safely, Building Your Own MCP Server in n8n, Opal, Cross-LLM Memory, and an Early Look at Claude CoworkexplainedComplex voice-only agents
Basecamp 6: Voice Agentsmentioned0:37:26Comparable platform, more developer-aimed; trainer prefers Retell's UI and settings
Office Hours IV: PostHog over Plausible, the Launch-Fast Loop, Scraping Ethics, Agent Swarms with Memory, and Why You Never Give Credits Away FreementionedVoice calling API
Session 7: The Outreach Enginementioned2:18:20The cold-DM success story: his email-copy skill booked VAPI's CTO for his podcast
Session 14: Claude Code — Advanced Workflowsmentioned0:21:30Used both ways in the CLI-vs-MCP decision rule
Session 30: C3 Town Hall — Four Cohort Products Under the Knife, Outcome Selling, and the Rest of the ProgrammementionedThe voice layer of Sarah's receptionist.
Day 6: Voice Agents That Talk Like Humans — the 5-Step Pipeline, Retell Settings That Matter, the 5-Section Prompt, cal.com Booking, and Call LoggingmentionedNamed only as a slip/contrast to Retell
Pillar 2 - Your Specialty: Own One Thing, the Specificity Formula, and the 'Get Ultra Specific' Interrogation Workflowmentioned
Turn Content Into Leads: the 3:2:1 Ratio, Hand-Raise Posts, Three Tiers of Lead Magnet, the Comment-to-DM Funnel, and the Rule of 100mentionedTrainer's voice-agent tool, in the example

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