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ThinnestAI vs Retell AI
Retell publishes the cleanest unbundled voice AI pricing in the industry. Here's how ThinnestAI's flat rate from ₹2/min, telephony included, stacks up for Indian teams.
TL;DR
- Retell's all-in per-minute cost is $0.07–$0.31 depending on the LLM and TTS you pick. ThinnestAI is a flat, all-inclusive rate from ₹2/min — no separate LLM or TTS line items.
- Retell has no documented India presence — no INR billing, no GST, no Indic-tuned voice routing, no DLT-compliant phone numbers.
- Retell wins on simulation tooling and SOC 2 / HIPAA compliance for US teams. ThinnestAI wins on Indian-language production quality and local phone ops.
Pricing math
Real pricing math, three volume tiers
Retell's public rate card shows $0.07 (Gemini Flash Lite) to $0.31/min (Claude 4.5 Sonnet). We use a mid-point of $0.18/min for a production-grade stack. ThinnestAI is a flat, all-inclusive rate — ₹2/min on standard voices and ₹2.5/min on premium voices, with telephony and the curated model stack already included either way; the math below uses the ₹2/min standard-voice rate. Converted at ₹83/$.
Startup
10,000 min / month
You save
₹1.30 L/ month
Growth
1,00,000 min / month
You save
₹13.00 L/ month
Scale
10,00,000 min / month
You save
₹1.30 Cr/ month
Pricing sourced from public rate cards as of April 2026. On the competitor's side your actual costs depend on prompt length, output tokens, provider choice and whether you bring your own keys. ThinnestAI's side is the flat, all-inclusive per-minute rate, pre-GST, billed in 30-second pulses. Verify current rates on each vendor's pricing page before committing.
Features
Feature-by-feature comparison
| Feature | ThinnestAI | Retell AI |
|---|---|---|
| Platform model | Flat from ₹2/min (telephony included), curated stack | Unbundled per-component |
| INR / GST billing | Yes | No — USD only |
| Indian phone numbers | Native — buy from us, or import a Plivo, Vobiz, Twilio or Telnyx number (BYOK), DLT-compliant | BYO Twilio, DIY compliance |
| No-code agent setup | Yes — tabbed settings, no visual flow canvas | Yes — Conversation Flow |
| Indic-tuned voice routing | Opinionated routing across Indic providers | Not advertised, English-first |
| SOC 2 / HIPAA | Enterprise tier | Yes — production-ready |
| Call simulation / testing | Basic | Best-in-class simulation tooling |
Honest fit
When each one wins
Choose Retell AI when
You are a US support/sales team
- Your audience is English-speaking.
- You need SOC 2 and HIPAA certification for regulated US buyers.
- You want Retell's industry-leading call simulation and testing tools.
- Unbundled billing transparency is more valuable to you than a flat, all-inclusive rate.
Choose ThinnestAI when
You are building for India or going global from India
- You serve Hindi, Marathi, Tamil, Telugu or any Indian-language audience.
- You need INR billing and GST-compliant tax invoices, not USD Stripe charges.
- You want native Indian phone number procurement — buy from us directly, or import an existing Plivo, Vobiz, Twilio or Telnyx number (DLT-compliant BYOK).
- You want a curated, production-tuned model stack (LLM, STT, TTS) without stitching providers together yourself.
- A flat, all-inclusive rate from ₹2/min beats negotiated or unbundled pricing for cost predictability.
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