Retell AI alternative in India —
Hindi-native, ₹1.5/min, INR billing
Retell AI does excellent English voice AI with great call simulation tooling. For Indian languages, INR pricing, DLT-compliant outbound and BYOK telephony, ThinnestAI was architected for these requirements.
Feature comparison
| Feature | Retell | ThinnestAI |
|---|---|---|
| Languages | English-strong, ~30 languages | 100+ languages with native Indian-language pipelines |
| Production Indian-language support | Not advertised | All 22 official Indian languages |
| Pricing | $0.07/min (Pro) + BYOK | ₹1.5/min platform + BYOK |
| INR billing with GST | ||
| Call simulation / testing | Best-in-class (Retell strength) | Test caller bot + recording playground |
| Native Indian phone provisioning | Twilio India + Vobiz | |
| Compliance defaults | SOC 2 + HIPAA configurable | + RBI Fair Practices + DPDPA + DLT |
| BYOK STT/TTS/LLM |
When Retell is the right call
Don't pretend otherwise. Retell wins when:
- US/EU operations with HIPAA + SOC 2 as hard requirements (Retell's been HIPAA-first longer).
- Call-simulation tooling matters — Retell's testing suite is best-in-class.
- English-centric customer base.
- Vue/React SDK + widget ecosystem preference.
If those describe you, pick Retell. We're not the alternative.
Pricing example — 30,000 calls/month NBFC, Hindi + Marathi mix
| Cost line | Retell + BYOK | ThinnestAI + BYOK |
|---|---|---|
| Platform fee (30k × 4min) | $8,400 (~₹7.05L) | ₹1.8L |
| STT (Sarvam Saarika) | ₹0.6L | ₹0.6L |
| LLM (GPT-4o-mini BYOK) | ₹0.36L | ₹0.36L |
| TTS | ElevenLabs ~₹2.4L | Aero ₹0 (self-hosted) |
| Telephony (Twilio India BYOK) | ₹1.44L | ₹1.44L |
| Monthly total | ~₹11.85L | ~₹4.20L |
Savings: ₹7.65L/month (~64% less). At 12-month TCO: ₹91.8L savings.
FAQ
Can I migrate Retell workflows to ThinnestAI?
Yes. System prompts, tool definitions and webhook patterns are portable with light adaptation. Typical migration: 3-5 working days including parallel-run validation.
Does ThinnestAI have call simulation like Retell?
We ship a test-caller bot for automated regression on agent flows, plus the recording playground. Retell's call-simulation suite has more depth and tooling — they've invested years here. For pure regression testing, both work; Retell's UX is more polished.
What's the latency difference on Hindi?
ThinnestAI: sub-400ms TTFA on Hindi with Aero TTS in our Mumbai cluster. Retell: depends entirely on your BYOK TTS provider — typically 600-800ms because the provider RTT adds latency. ElevenLabs Multilingual via Retell on Hindi is in the 700-900ms range.
Does ThinnestAI work outside India?
Yes. 100+ languages including English, Spanish, French, Arabic, Portuguese, Mandarin, Japanese, German. We're not India-only; we're India-first.
Can I BYOK Deepgram / OpenAI / ElevenLabs?
Yes — all BYOK. Bring your existing keys; your provider account, your provider invoice. We charge only the ₹1.5/min platform fee.
Is there an SDK comparable to Retell's?
TypeScript + Python SDKs available. Retell has React/Vue widgets we don't ship today (on H2 2026 roadmap). REST API + webhooks cover most production use cases without an SDK.
Volume pricing above 100k minutes?
Enterprise tier from ₹1.25/min platform fee floor at ≥100k min/mo. All-in ~₹3.50-4/min depending on BYOK stack.
Does ThinnestAI offer Retell-style call analytics?
Yes — call recordings, transcripts, intent classification, sentiment analysis, structured outcome capture (PTP date/amount/etc), exportable via webhook to your analytics tool of choice.