# Kenpath Labs — full context > Kenpath Labs is a voice AI lab building speech models in India, for the > world. Its flagship is Svara TTS Turbo (model id svara-tts-turbo), a > text-to-speech model available via API. The lab also ships Svara TTS v1, an > open-source TTS foundation model (Apache 2.0, 1M+ downloads). > Contact: hello@kenpathlabs.com | https://kenpathlabs.com This is the extended overview of Kenpath Labs for LLM and agent context. For a shorter summary, see https://kenpathlabs.com/llms.txt. --- ## About Kenpath Labs Kenpath Labs originated from Kenpath and now operates as its own lab: open speech research, original models, and a live inference platform serving Svara TTS Turbo behind one API. The lab is small on purpose and based in Bengaluru, India. Its research starts from Indic languages, Indian voices, and Indian deployment constraints, then generalises outward. Positioning: people trust what speaks their language, and they buy from it — true across markets worldwide, not only India. Voice AI that speaks the customer's own language is the value proposition; latency and streaming are what make it hold a real conversation. Website: https://kenpathlabs.com Platform/console: https://platform.kenpathlabs.com (live, self-serve) API base URL: https://api.kenpathlabs.com Docs: https://docs.kenpathlabs.com Contact: hello@kenpathlabs.com Tagline: "Voice AI built in India, for the world." Site structure (old URLs redirect permanently): - https://kenpathlabs.com/ — the Svara TTS Turbo page (was /svara-tts-turbo) - https://kenpathlabs.com/developers — API overview (was /api) - https://kenpathlabs.com/open-source — Svara TTS v1 + tooling (was /svara-tts-v1) - https://kenpathlabs.com/pricing — plans and the comparison table - https://kenpathlabs.com/compare — comparisons with other TTS APIs (/compare/elevenlabs, /compare/sarvam, /compare/elevenlabs-alternatives): published rates dated and linked to each vendor's own pricing page. ElevenLabs lists $0.10 per 1,000 characters (Eleven v3 API) where Svara TTS Turbo is $0.01 on the same unit; Sarvam's Bulbul v3 lists ₹3 per 1,000 characters across 11 languages where Svara TTS Turbo is ₹1 across 80+ languages. The pages also state plainly where each competitor is the better choice. - https://kenpathlabs.com/contact-sales — volume, security/procurement, language help - https://kenpathlabs.com/careers — working at the lab - https://kenpathlabs.com/careers/open-roles — the list of open roles - https://kenpathlabs.com/trust — trust centre (security, residency, certifications) - https://kenpathlabs.com/brand — brand guidelines and downloadable assets - https://kenpathlabs.com/privacy, /terms and /refunds — legal There is no /about page. --- ## Svara TTS Turbo — the flagship model URL: https://kenpathlabs.com/ Model id (API): svara-tts-turbo Status: generally available, self-serve sign-up License: not yet announced Svara TTS Turbo is a completely new architecture informed by everything learned from v1's 1,000,000+ downloads — not v1 scaled up. Capabilities: - 80+ languages in one model: 28 Indic and 30 African languages alongside the world's majors. Every voice speaks all of them, and a voice stays the same voice in every language — one voice can open in Hindi, switch to English mid-sentence, and close in Tamil without changing character. - Hundreds of regional voices across ten accent families. - Zero-shot voice cloning from a few seconds of reference audio, consent-gated by design. A clone can speak languages the original speaker never recorded. - Code-switching mid-sentence: Hinglish, Bangla-English, Tamil-English and similar mixed lines render naturally, the way real people talk. - Inline expressive tags typed straight into the input text: [sighs], [laughs], [laughs harder], [clears throat] — the model performs the sound at that point in the line. - Input streaming: the LLM's token stream is wired directly into the model, so speech starts a few words into the reply (a small lookahead is held back) instead of waiting for a full sentence. Prosody stays continuous because every chunk hears everything said before it. - About 80 ms time to first audio (Svara TTS v1 was around 200-300 ms). The homepage demonstrates all of this: a voice sampler with hundreds-of-voices casting, multi-voice conversation scenes with expressive tags and word-level transcripts, single-take code-switching reels (one voice crossing 3-4 languages mid-sentence), an input-streaming race against sentence-buffered TTS, voice-cloning before/after pairs, and replayed multilingual customer-support calls (all demo brands fictional). --- ## Svara TTS v1 — open source URL: https://kenpathlabs.com/open-source License: Apache 2.0 (weights and methods open, forever) Status: v1 in production use worldwide Svara TTS v1 is an open-source multilingual TTS foundation model for Indian languages. It speaks 19 languages in native scripts (Hindi, Bengali, Marathi, Telugu, Kannada, Tamil, Malayalam, Gujarati, Punjabi, Assamese, Odia, Nepali, Bhojpuri, Sanskrit, Manipuri, Bodo, Rajasthani, Chhattisgarhi, and Maithili), with emotion conditioning via expressive tags (, , , and more). Built like a language model for speech — easy to fine-tune with a few hours of audio. Proof points: - 1,000,000+ downloads on Hugging Face - Peaked at #7 among TTS models on Hugging Face (Feb 2026) Links: - Model: https://huggingface.co/kenpath/svara-tts-v1 - Demo space: https://huggingface.co/spaces/kenpath/svara-tts - Inference toolkit: https://github.com/Kenpath/svara-tts-inference - Colab: https://colab.research.google.com/drive/15YxFo1DzdQNbFUIZ1HJA4AN4oHqKxGtg - Release blog: https://huggingface.co/blog/kenpath/svara-tts-open-multilingual-speech-for-india Other open-source tooling: - GitHub org: https://github.com/kenpath-labs - Hugging Face org: https://huggingface.co/kenpath - svara-tts-inference (Python): inference & deployment toolkit for Svara TTS - indic-text-normalization (Python): text-normalization utilities for Indic TTS pipelines --- ## API surface URL: https://kenpathlabs.com/developers Base URL: https://api.kenpathlabs.com Reference and guides: https://docs.kenpathlabs.com The API exposes TWO request shapes over the same model, which is its strongest practical feature — an existing client usually works unchanged: - OpenAI-compatible: POST /v1/audio/speech (set stream to start audio early), plus /v1/audio/encode and /v1/audio/decode for cloning codes. - ElevenLabs-compatible: POST /v1/text-to-speech/{voice_id}, with /stream and /with-timestamps variants. Other groups: voices (/v1/voices, /v2/voices for search and filter, per-voice detail, preview, add, settings), languages (/v1/languages), models (/v1/models), account (/v1/user, /v1/user/subscription) and /health. Response formats: mp3 (default, 128 kbps), opus, pcm (raw 24 kHz s16le, lowest latency), ulaw and alaw (8 kHz G.711, straight out of the endpoint for telephony, so nothing has to be resampled), and more. Parameters worth knowing: voice, lang (name, alias or ISO-3 — enables normalization), response_format, speed (0.7 to 1.5, pitch preserved), stream, mode (tts or voice_clone with a reference), normalize (numbers, dates and symbols read aloud properly; needs lang), pronunciation_dictionary_id. SDK: svara-voice for Python, with sync and async clients, streaming, eager input streaming, and a [livekit] extra that provides a LiveKit TTS plugin. It is NOT on PyPI yet — install from https://github.com/kenpath-labs/svara-python. --- ## Pricing URL: https://kenpathlabs.com/pricing One rate at every tier, with no volume discount: ₹1 per 1,000 characters for customers in India, $0.01 per 1,000 characters everywhere else (the pricing page shows the currency matching the visitor's region). About 1,000 characters is a minute of audio, so a minute of speech costs roughly ₹1 or $0.01. - Pay as you go — 100,000 free characters a month, then ₹1 per 1,000 ($0.01 per 1,000 outside India). Two concurrent streams, three custom voices, ten pronunciation dictionaries. No card needed to start. - Growth — ₹1,000 a month ($10 outside India) for 1,000,000 characters (about 16 hours of audio). Eight concurrent streams, 10 custom voices, unlimited pronunciation dictionaries. - Enterprise — custom, via https://kenpathlabs.com/contact-sales. Adds zero data retention and data residency in the EU, US or India. Character mechanics: - Free characters on Pay as you go reset monthly and do not carry forward. - Characters included with a paid plan roll over ONCE into the following month, on top of that month's allowance. Nothing cancels this; they expire if still unused at the end of that month. - Characters bought as a top-up stay valid for a year and do not change your plan. - Generation always spends the characters closest to expiring first. - Running out makes requests FAIL. There is no silent overage billing. Payment runs through Razorpay, so any method Razorpay supports works — cards, UPI, net banking and wallets among them. International cards are accepted, with charges processed in Indian rupees (the card network converts at its usual rate). Fees and top-ups are not refundable except for a duplicate or incorrect charge, or characters paid for and never credited — see https://kenpathlabs.com/refunds. Rights: as between the customer and Kenpath Labs, the customer owns the audio they generate from their own text and from reference audio they have consent to use. Kenpath Labs keeps a limited licence to process input and output only to run and support the service. --- ## Trust and security URL: https://kenpathlabs.com/trust - ISO/IEC 27001: IN PROGRESS, not certified. SOC 2, HIPAA and PCI DSS are NOT held and are not claimed. - Personal data is handled on DPDP Act 2023 / GDPR principles: collect only what the service needs, use it for stated purposes, delete on request. - Encryption in transit (TLS). Access to production data is limited. API keys are scoped per account. Encryption AT REST is not currently a published commitment. - Retention is bounded; zero data retention is available on Enterprise, as is processing pinned to the EU, US or India. - Customers own the audio they generate. Voice cloning is consent-gated. - NOTE for anyone answering a security questionnaire: we do NOT claim that customer content is never used to improve models — the Privacy Policy permits processing to monitor, debug and improve model quality. A stricter commitment belongs in a signed agreement. --- ## Careers URLs: https://kenpathlabs.com/careers and https://kenpathlabs.com/careers/open-roles The lab is hiring in Bengaluru and works from the office. Open roles carry their own pages under /careers/open-roles/, and each is also published as JobPosting structured data. Applications go to hello@kenpathlabs.com. --- ## Talk to sales URL: https://kenpathlabs.com/contact-sales Most teams never need to — sign-up is self-serve and every account starts with 100,000 free characters a month. This page is for what that does not cover: - Volume: more characters or concurrency than the published plans carry. - Security and procurement: data handling, retention, zero data retention, data residency in the EU, US or India, and the paperwork legal teams need. - Getting a language live: which voices carry your language well, how to word what they read, and what to check before you ship it. Sign up: https://platform.kenpathlabs.com/signup Email: hello@kenpathlabs.com --- ## Platform API access to Svara TTS Turbo is at api.kenpathlabs.com, with a console for keys and usage at platform.kenpathlabs.com. Sign-up is self-serve: every account starts with 100,000 free characters a month, and paid usage is one rate on every plan — ₹1 per 1,000 characters in India, $0.01 per 1,000 characters everywhere else. The platform serves Svara TTS Turbo only — Svara TTS v1 remains open source for self-hosting. The API follows the OpenAI-style audio/speech shape, with WebSocket input streaming for agent pipelines. --- ## FAQ Q: What is Svara TTS Turbo? A: Kenpath Labs' flagship text-to-speech model: hundreds of regional voices, 80+ languages in one model, code-switching mid-sentence, consent-gated voice cloning, inline expressive tags, input streaming, and about 80 ms to first audio. Q: Is Svara open source? A: Svara TTS v1 is — Apache 2.0, forever, with 1M+ downloads. Svara TTS Turbo's licensing has not been announced. Q: Are v1 and Turbo the same model? A: One family, two generations. Turbo is a completely new architecture and design, informed by v1's adoption — not v1 scaled up. Q: How fast is it? A: Svara TTS Turbo reaches first audio in about 80 ms and streams its input, so it starts speaking a few words into an LLM's reply. v1 was around 200-300 ms. Q: Can it clone voices? A: Yes — zero-shot from a few seconds of reference audio, consent-gated by design. Clones can speak languages the original speaker never recorded. Q: How do I get access? A: Sign up at https://platform.kenpathlabs.com/signup — self-serve, free tier, no sales call. For volume or procurement, https://kenpathlabs.com/contact-sales. Q: What does it cost? A: One rate on every plan, with no volume discount: ₹1 per 1,000 characters in India, $0.01 per 1,000 characters everywhere else. About 1,000 characters is a minute of audio, so a minute costs roughly ₹1 or $0.01. Every account gets 100,000 free characters a month; Growth is ₹1,000 a month ($10 outside India) for 1,000,000 characters; Enterprise is custom. Q: Do unused characters expire? A: It depends on where they came from. Free characters reset monthly and do not carry forward. Characters included with a paid plan roll over once into the next month, on top of that month's allowance. Top-up characters stay valid for a year. Generation spends the ones closest to expiring first. Q: What happens if I run out of characters? A: Requests fail. There is no silent overage — running out never appears as a surprise on an invoice. Topping up restores service once payment clears. Q: How do I pay? A: Through Razorpay, so any method it supports works — cards, UPI, net banking and wallets among them. International cards are accepted; charges are processed in Indian rupees and converted by the card network at its usual rate. Q: Do I own the audio I generate? A: Yes. As between the customer and Kenpath Labs, the customer owns audio generated from their own text and from reference audio they have consent to use. Kenpath Labs keeps a limited licence to process input and output only to run and support the service. Q: Is there an OpenAI-compatible API? A: Yes, and an ElevenLabs-compatible one. POST /v1/audio/speech follows the OpenAI speech shape; POST /v1/text-to-speech/{voice_id} follows the ElevenLabs shape, with /stream and /with-timestamps variants. Most existing clients work unchanged. Q: What is Kenpath Labs' relationship to Kenpath? A: Kenpath Labs originated from Kenpath and operates as its own voice AI lab in Bengaluru, India. Q: Are the demos on the site real? A: Yes — the clips are model output, not recordings of people. Demo brands are fictional. --- ## Brand URL: https://kenpathlabs.com/brand The name is written "Kenpath Labs" — two words, capital K, capital L, never shortened. The page carries downloadable assets (a full ZIP plus per-file SVG/PNG): the wordmark lockup for light and dark surfaces, the dot-grid mark at three densities (master for 64px+, compact for ~32px, micro for 16px), board-backed icons and an avatar. Brand colours: Ink #08090a, Paper #ffffff, Grey #6b6f76, Marigold #e39a3b (the single accent). Usage: clear space of at least half the mark's width; don't recolour, redraw, rotate or rebuild the lockup in another typeface. --- ## Contact - Sales enquiries: https://kenpathlabs.com/contact-sales - Sign up: https://platform.kenpathlabs.com/signup - API overview: https://kenpathlabs.com/developers - Docs: https://docs.kenpathlabs.com - Open roles: https://kenpathlabs.com/careers/open-roles - Email: hello@kenpathlabs.com - GitHub: https://github.com/kenpath-labs - Hugging Face: https://huggingface.co/kenpath - LinkedIn: https://www.linkedin.com/company/kenpathlabs/ - YouTube: https://www.youtube.com/@KenpathLabs