How long does Vapi voice agent development take?

Quick Build: 2 weeks. Production Build: 3–4 weeks. Enterprise: 6–10 weeks. We start within 2 business days of receiving the 40% deposit.

How much does Vapi development cost?

₹75,000 flat for Quick Build + ₹5,000/mo maintenance. ₹1,75,000 for Production Build (multi-flow, CRM integration) + ₹10,000/mo. Vapi's per-minute fees ($0.05+) are billed separately by Vapi to your account.

Do I need a Vapi account before hiring you?

Either way works. If you have one, we work in your existing workspace. If not, we'll help you set up a free account in the discovery call — Vapi gives $10 free credit to start.

What if I want to switch from Vapi later?

Easy. Vapi is API-driven, so the prompts, function specs, and webhook handlers we build are mostly portable. Migration to another platform (or to Edesy) is typically Production-tier pricing.

Do you handle Vapi's webhook latency optimization?

Yes. Webhook handler is deployed close to Vapi's region (us-west typically) to minimize round-trip latency. We target end-to-end conversational latency under 500ms.

Can you set up Vapi function calling for our backend APIs?

Yes. We build the Vapi tool specs, wire them to your endpoints, and handle auth (API key, OAuth, JWT). Up to 5 tools included in Production Build.

Does this work with Vapi Squads (multi-agent)?

Yes — Vapi Squads are part of Production Build scope. We design the squad routing (greeter → specialist → human handoff) and configure handoff logic.

How do you handle Vapi outages or model regressions?

On the maintenance retainer, we monitor health weekly. If Vapi has issues, we help you switch the underlying model/provider in Vapi or migrate to a backup platform on best-effort basis. Vapi outages themselves are not in our scope (we don't control them).

Developer-First Voice AI Platform

Vapi Voice Agent Built for You

You picked Vapi. We'll build the voice agent on it — prompt engineering, voice/STT/TTS selection, telephony, function calling, CRM hooks. Flat ₹75,000 one-time, delivered in 2 weeks.

Get a Vapi Build Quote

Book a 30-min scoping call

₹75,000

Flat one-time price

2 weeks

Standard delivery

₹5,000/mo

Maintenance retainer

14 days

Bug-fix warranty

Vapi build pricing

Quick Build covers a single use case on Vapi. Multi-flow agents with function calling fit Production Build.

Quick Voice Agent Build

₹75,000one-time+ ₹5,000/month maintenance

Single use case, one language, ready in 2 weeks

Single use case: lead qualification, appointment booking, FAQ bot, or order status
One language (English or one Indian language)
Standard voices from the platform's catalog
Production-ready prompt engineering
Basic CRM webhook (1 platform)
Telephony setup (Twilio, Exotel, or platform-native)
End-to-end test calls verified
1 round of revisions
14 days post-launch bug-fix warranty
Setup documentation
Delivery: 2 weeks

What we build on Vapi

Standard configurations included in our packages.

Vapi assistant configuration

Assistant created in your Vapi workspace with carefully tuned prompt, model, and conversation settings.

Voice + STT + TTS selection

We benchmark Deepgram, AssemblyAI, ElevenLabs, OpenAI for your use case and pick the lowest-latency, best-quality combo.

Function calling for external APIs

Vapi tools wired to your APIs — booking systems, CRM lookups, payment links, knowledge base queries.

Twilio / Plivo / Vonage telephony

Phone number provisioned, SIP routing configured, inbound + outbound flows tested end-to-end.

Vapi webhook → your backend

Call events streamed to your endpoint or CRM. Recording URL, transcript, call analysis, intent detection.

50+ test calls before go-live

Internal QA covers happy paths, edge cases, interruptions, silence handling, and platform-specific quirks.

Vapi technical stack we work with

What we'll set up and tune for your build:

Vapi Assistants API (latest version)
Models: OpenAI GPT-4o, Claude, Gemini, Together AI
STT: Deepgram Nova-3, AssemblyAI Universal, Whisper
TTS: ElevenLabs, Cartesia, PlayHT, Deepgram
Telephony: Twilio, Vonage, Telnyx, Vapi-native numbers
Tools/Function calling for external integrations
Webhooks for call lifecycle events

Typical Vapi build deliverables

What you'll have at the end of the project:

Vapi assistant configured in your account (you own it)
Phone number assigned, telephony tested
Prompt template documented for future edits
Function-calling specs documented
Webhook handler deployed (your infra or ours)
Recording + transcript pipeline working
Setup runbook + troubleshooting guide

Have you considered Edesy first?

Vapi is great. But if you're an Indian business needing Hindi/regional languages, bundled Exotel telephony, GST-compliant billing, and one vendor — Edesy is purpose-built for that. Same build service at the same price.

Best for: Indian businesses, Hindi-first products, founders who don't want multi-vendor coordination

Stay on Vapi if

Vapi makes sense when you want developer-first orchestration, are happy with US-centric telephony, prefer to mix-and-match providers, or have already invested in Vapi-specific tooling.

Best for: Developer teams, US-first deployments, builders who want full provider flexibility

How we'll build your voice agent

Predictable 6-step process from first call to deployed agent

Discovery call

30–45 min call to understand your use case, channels, volume estimates, and chosen platform. Free for standard builds, ₹25,000 for enterprise (credited).

Scope + fixed-price quote

1-page scope document with exact deliverables, timeline, prompt strategy, and price. Two days to deliver.

40% deposit, build begins

Work starts within 2 business days of deposit. You get a Slack/email channel for daily updates.

Prompt engineering + flow build

Prompt drafted, flows configured in your chosen platform, voice + STT + TTS selected for your use case.

Internal QA + your UAT

We run 50+ test calls covering happy paths and edge cases. You sign off on UAT before production deploy.

Production deploy + handoff

Number assigned, agent live, final demo, documentation handoff. 60% balance due. Maintenance retainer starts day after launch.

Edesy build service vs. hiring a freelancer or in-house team

What the alternatives actually cost over 12 months

Feature	Dimension	Upwork freelancer	In-house engineer	Edesy
Prompt engineering expertise
Voice/STT/TTS provider knowledge
Latency optimization built-in
Indian language support out-of-box
Telephony setup included
Fixed price, no overruns
Bug-fix warranty post-launch
Maintenance when models/APIs change
12-month total cost (estimate)

Other voice agent platforms we build on

Edesy (Recommended)

India-first voice platform.

Retell AI

Premium US call quality.

Bolna

Indian platform, open-source.

Bland AI

US-focused voice platform.

Ready to build on Vapi?

Book a 30-minute scoping call. We'll send a fixed-price quote within one business day.

Get Vapi Build Quote Contact Sales