ThinnestAI vs Retell AI
Retell publishes the cleanest unbundled voice AI pricing in the industry. Here's how ThinnestAI's flat ₹2/min, telephony included, stacks up for Indian teams.
- Retell's all-in per-minute cost is $0.07–$0.31 depending on the LLM and TTS you pick. ThinnestAI is a flat ₹2/min, all-inclusive rate — 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.
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 $0.18/min for a production-grade stack. ThinnestAI is a flat ₹2/min, all-inclusive rate — telephony and the curated model stack are already included. Converted at ₹83/$.
Pricing sourced from public rate cards as of April 2026. Your actual costs depend on prompt length, output tokens, provider choice, and BYOK status. Verify current rates on each vendor's pricing page before committing.
Feature-by-feature comparison
| Feature | ThinnestAI | Retell AI |
|---|---|---|
| Platform model | Flat ₹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 number (BYOK), DLT-compliant | BYO Twilio, DIY compliance |
| No-code flow editor | Yes | 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 |
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.
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 number (DLT-compliant BYOK).
- You want a curated, production-tuned model stack (LLM, STT, TTS) without stitching providers together yourself.
- A flat, all-inclusive ₹2/min rate beats negotiated or unbundled pricing for cost predictability.
Try ThinnestAI free
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Frequently asked questions
Is ThinnestAI cheaper than Retell AI?
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At a typical production stack (mid-cost LLM + standard TTS + phone), Retell lands around $0.18/min (≈ ₹15/min). ThinnestAI is a flat ₹2/min, all-inclusive rate — roughly 85% cheaper.
Does Retell support Hindi and other Indian languages?
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Retell does not advertise production Indian-language support on its pricing or product pages. Quality depends entirely on which STT/TTS you wire in. ThinnestAI has opinionated routing across 100+ languages — every official Indian language plus global — via Sarvam, Deepgram, ElevenLabs and other providers.
When should I pick Retell over ThinnestAI?
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Pick Retell if you are a US support or sales team building English call automation where SOC 2/HIPAA is a hard requirement and call simulation tooling matters more than Indic language quality or INR billing.
Does ThinnestAI let me choose my own LLM, STT and TTS the way Retell does?
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Not the same way. ThinnestAI runs a curated, production-tuned stack (OpenAI, Anthropic, Groq, Gemini, Sarvam for LLM; Deepgram, Sarvam, AssemblyAI for STT; ElevenLabs, Cartesia, Sarvam for TTS) that's routed automatically per agent — all inside the flat ₹2/min rate, instead of the unbundled per-component pricing Retell exposes.