Soniox
Soniox provides a unified API and consumer app for multilingual speech-to-text, text-to-speech, and real-time translation across 60+ languages, serving developers and global enterprises building voice products.
- Company typePrivate
- Founded2020
- HeadquartersSan Francisco, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Soniox does
Soniox is a privately held speech AI company that provides a unified API platform for multilingual speech-to-text, text-to-speech, and real-time speech translation across 60+ languages and 3,600 language pairs. Its core technology is the proprietary in-house Soniox v5 model, optimized for real-world conditions including language switching mid-conversation, alphanumerics, names, noisy audio, and sub-200ms streaming latency, with a published third-party-comparable benchmark of 98.8% accuracy on Welsh transcription. The platform is delivered both as a usage-based API for developers and enterprises and as a consumer/prosumer Soniox App (mobile, desktop, web) with Free, Pro ($19.99/month or $120/year), and Business ($30/user/month) tiers, plus a Soniox Sovereign Cloud option for regional data residency.
The go-to-market is hybrid: API-first and product-led, with self-serve developer onboarding through console.soniox.com, comparison-based SEO targeting OpenAI, Google, Azure, Deepgram, Speechmatics, and AssemblyAI, and field sales into enterprises. Named enterprise customers include Samsung, LG, Perplexity, Krisp, Truecaller, Agora, Fireflies, and DeliverHealth, with additional use cases spanning automotive voicebots (mobilApp), real-time translation (Transync), and meeting knowledge management (Tana). Compliance posture includes SOC 2 Type 2, ISO/IEC 27001:2022, HIPAA, and GDPR, supporting adoption in healthcare and other regulated sectors.
The company is headquartered in Foster City, California, with a primary engineering and research hub in Ljubljana, Slovenia, and reports 1-10 employees. It was co-founded by Klemen Simonic (CEO, ex-Facebook, Google, Stanford, University of Ljubljana) and Ambroz Bizjak (Chief Architect). Strategic integrations with Tencent Cloud, LiveKit, and Pipecat position Soniox as a default speech layer in major voice agent and bot ecosystems. No external funding rounds, parent company, or institutional investors are disclosed in the available data, suggesting founder-owned operations.
Soniox firmographics
Firmographics- Name
- Soniox
- Legal name
- Soniox
- Website
- https://soniox.com
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Soniox provides a unified API and consumer app for multilingual speech-to-text, text-to-speech, and real-time translation across 60+ languages, serving developers and global enterprises building voice products.
- Ownership category
- akta.pro rank
Soniox industry classification
Industry- Product category
- Speech AI Platform
- NAICS
- Custom Computer Programming Services (541511)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Conversational AI Platforms (chat/voice bots, orchestration) (HDAAAFAC)
- akta.pro secondary industries
- Text-to-Speech (TTS) & Voice Synthesis (HDAAAFAB), Voice Assistants & Voice UI (VUI) (HDAAAFAD)
Keywords
Where Soniox is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Soniox business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- API Usage-Based Revenue: Soniox API provides speech-to-text, text-to-speech, and translation APIs for developers and enterprises, billed based on usage. The same underlying speech AI models power both the Soniox App and API.
- Soniox App Subscriptions: Consumer/prosumer subscription revenue from the Soniox App across mobile (iOS, Android), desktop (macOS, Windows), and web platforms. Plans include Free (weekly credits), Pro ($19.99/month or $120/year), and Business ($30/user/month).
- Freemium Model: Free plan provides weekly credits for transcribing, translating, and voice typing on all platforms. Drives adoption for conversion to Pro and Business paid tiers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Weekly | Free - For individuals getting started |
| Subscription | Monthly | Pro - For individuals who use voice every day |
| Subscription | Monthly | Business - For teams and organizations |
Go-to-market motion3 records
Distribution channels5 records
Marketing channels5 records
Soniox product offering
Product offeringCore offering
Soniox provides a unified multilingual speech AI platform delivered through a single API that combines real-time speech-to-text, text-to-speech, and speech translation across 60+ languages and 3,600 language pairs. The same underlying Soniox v5 models power a consumer and team application (Soniox App) available on iOS, Android, macOS, Windows, and web, used for live transcription, real-time translation, and voice typing. Customers include global enterprises such as Perplexity, Samsung, LG, Krisp, Truecaller, and Agora, as well as individual developers building voice agents, wearables, and dictation products.
Product overview
Soniox is a multilingual Speech AI platform offering both a unified API product and consumer application. The API product consists of three core APIs: Speech-to-Text API, Text-to-Speech API, and Speech Translation API, all powered by the Soniox v5 model and designed for real-time applications. The Soniox App is a consumer/team application that bundles Smart Scribe (transcription), Translator (translation), and Voice Typing features across mobile, desktop, and web platforms. Both the API and App use the same underlying speech AI models, enabling developers to build with the API while end users access the same technology through the App.
Differentiator
Problem solved
Functional benefit
Brands
- Soniox App: Ready-to-use speech transcription and translation app for individuals and teams on mobile, desktop, and web
- Speech-to-Text API
- Text-to-Speech API
- Speech Translation API
- Smart Scribe
- Translator
- Voice Typing
- Soniox Sovereign Cloud
Products and services
- Speech-to-Text API Real-time speech-to-text API that converts spoken language into text across 60+ languages with sub-200ms latency, supporting multilingual conversations, mid-sentence language switching, alphanumerics, names, and multi-speaker detection. Built for developers and enterprises constructing voice agents, meeting platforms, contact center transcription, and wearables.
- Text-to-Speech API API that produces high-fidelity, hallucination-free audio output in 60+ languages with precise handling of alphanumerics, foreign names, borrowed words, language switching, and ultra-low-latency streaming. Targets developers and enterprises building voice agents, accessibility tools, and conversational products.
- Speech Translation API Real-time speech translation API that translates spoken input across 60+ languages and 3,600 language pairs with low-latency output before sentences finish. Designed for code-switching environments where speakers switch languages mid-sentence. Targets developers and enterprises building multilingual meeting, conferencing, and agent products.
- Soniox App Ready-to-use application that provides Smart Scribe for live conversation transcription, Translator for real-time translation between 60+ languages, and Voice Typing for dictation in any app. Available on mobile (iOS, Android), desktop (macOS, Windows), and web, with Free, Pro ($19.99/month or $120/year), and Business ($30/user/month) tiers. Targets individuals, prosumers, and teams needing voice capture and translation without technical integration.
Quantifiable outcome
- Sub-200ms latency for real-time transcription
- +2 more outcomes
Companies that use Soniox
Customer profileNamed customers13 records
Segments6 records
Ideal customer profiles3 records
Soniox technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration3 records
AI capability7 records
Feature9 records
Soniox partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core.
- Tencent CloudcoreSoniox is natively integrated into Tencent Cloud, bringing multilingual voice AI to a wider developer audience through Tencent Cloud's platform and ecosystem.
- LiveKitcoreSoniox Speech-to-Text and Text-to-Speech APIs are fully integrated with LiveKit, enabling developers to build multilingual voice agents with a unified speech layer.
- PipecatcoreSoniox Text-to-Speech is fully available in Pipecat, allowing developers to build multilingual voice bots using Soniox API within the Pipecat platform.
Scale indicators3 records
Recent moves6 records
Expansion highlights7 records
Soniox competitors and assessment
Company assessmentDirect peers
- Deepgram: Deepgram offers a developer-focused speech-to-text API with real-time streaming, similar pricing model, and an explicit head-to-head comparison page on Soniox's site. Closest direct competitor to Soniox's STT API.
- AssemblyAI: AssemblyAI provides speech-to-text and speech understanding APIs to developers and enterprises, competing on accuracy and feature breadth. Listed as a direct competitor on Soniox's comparison page.
- Speechmatics: Speechmatics offers speech recognition APIs with a focus on accuracy across accents and languages. Explicitly compared by Soniox and competes for the same multilingual enterprise STT use cases.
- ElevenLabs: ElevenLabs provides high-fidelity text-to-speech and voice synthesis APIs, directly overlapping Soniox's TTS API product. Both target developers building multilingual voice agents and prosumer applications.
- Rev AI: Rev AI provides automated speech recognition APIs for developers, including real-time and async transcription. Competes in the same developer-focused STT market as Soniox.
- PlayHT: PlayHT offers AI text-to-speech APIs with voice cloning capabilities for developers and content creators. Directly comparable to Soniox's TTS API in target market and pricing model.
Broad incumbents
- OpenAI (Whisper / Realtime API): OpenAI offers Whisper for STT and the Realtime API for speech, embedded in the broader GPT ecosystem. Listed as a benchmark competitor by Soniox and has massive distribution via ChatGPT and the OpenAI platform.
- Google Cloud Speech-to-Text: Google Cloud Speech-to-Text is a hyperscaler speech AI service. Listed as a direct comparison on Soniox's site and competes on price-bundling and language coverage as part of Google Cloud.
- Azure AI Speech: Microsoft Azure offers STT, TTS, and speech translation APIs integrated with the Azure cloud ecosystem. Competes with Soniox for enterprise customers already standardized on Microsoft.
- Amazon Transcribe: Amazon Transcribe is the AWS speech-to-text service, bundled with broader AWS services. A relevant incumbent competitor, particularly for AWS-centric enterprise customers.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Soniox social profiles
Digital presenceSoniox compliance and trust
Trust signalCompliance4 records
Soniox financial estimates
Financial estimateRevenue estimate
Valuation estimate
Soniox leadership team
Management profileNumber of profiles
Profiles2 records
Soniox funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Soniox M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Soniox
What does Soniox do?
Soniox provides a unified multilingual speech AI platform delivered through a single API that combines real-time speech-to-text, text-to-speech, and speech translation across 60+ languages and 3,600 language pairs. The same underlying Soniox v5 models power a consumer and team application (Soniox App) available on iOS, Android, macOS, Windows, and web, used for live transcription, real-time translation, and voice typing. Customers include global enterprises such as Perplexity, Samsung, LG, Krisp, Truecaller, and Agora, as well as individual developers building voice agents, wearables, and dictation products.
Is Soniox a public or private company?
Soniox is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Soniox founded?
Soniox was founded in 2020. It employs 1 to 10 people.
Where is Soniox based?
Soniox is headquartered in San Francisco, United States, in the North America region.
How does Soniox make money?
Three revenue lines are on record. API Usage-Based Revenue is the primary driver. The others are soniox App Subscriptions and freemium Model.
Who are Soniox's main competitors?
Direct peers on record are Deepgram, AssemblyAI, Speechmatics, ElevenLabs, Rev AI and PlayHT. Broad incumbents are OpenAI (Whisper / Realtime API), Google Cloud Speech-to-Text, Azure AI Speech and Amazon Transcribe.
Does Soniox have an API?
Yes. Soniox provides production-ready real-time speech-to-text, text-to-speech, and speech translation APIs for developers and enterprises. The APIs support live applications, voice agents, meetings, and large-scale enterprise systems. They feature low-latency real-time streaming, high accuracy across accents and domains, and scalable infrastructure. Developer documentation is at soniox.com/docs.
What industry is Soniox in?
Soniox's product category is Speech AI Platform. Its primary akta.pro industry code is HDAAAFAC, Conversational AI Platforms (chat/voice bots, orchestration), with a secondary code of HDAAAFAB, Text-to-Speech (TTS) & Voice Synthesis. Its NAICS code is 541511 and its SIC code is 7372.