World’s most accurate Portuguese speech-to-text
The world’s most accurate real-time speech-to-text API for Portuguese, powering voice agents, live systems, and applications across 60+ languages.
Trusted by teams building global voice products
Unmatched accuracy in Portuguese and 60+ languages
Portuguese is spoken by over 280 million people worldwide — across Brazil, Portugal, Angola, Mozambique, Guinea-Bissau, Cape Verde, São Tomé and Príncipe, and beyond. For years, Portuguese speech-to-text has fallen short, failing at fundamentals like accurate and reliable recognition, multiple languages, and alphanumerics. It converted Portuguese audio into words, but the words lacked meaning and context.
Soniox reimagined everything Portuguese speech-to-text got wrong. You can speak naturally, switch languages mid-sentence, spell out codes and names, or ask for instant Portuguese translation, all in real-time. Soniox doesn’t just transcribe Portuguese speech – it understands it.
Portuguese native-speaker accuracy
Accurate Portuguese speech recognition across accents, dialects, and real-world conversational speech.
“We tried a dozen speech-to-text and translation services. Soniox is the best, so that's what we use.”
Cayden Pierce, CEO/CTO at MentraAutomatically detect and switch languages with Portuguese
Soniox identifies the language automatically and follows changes between Portuguese and other languages as they happen, even within the same sentence.
Get every character right in Portuguese
Names, phone numbers, addresses, IDs, serial numbers, and other structured information spoken in Portuguese are recognized precisely.
Phone number
O meu número é +49 172 684 9317.
Reference ID
O número do processo é AX-4927-B.
Mixed alphanumeric
O número de série do dispositivo é XR8Q-19F2.
International name
Nguyễn Minh Anh vai juntar-se à reunião às três.
Improve Portuguese accuracy with context
Provide terminology, names, or custom vocabulary to guide Portuguese recognition toward the right words, without retraining models.
Know when the speaker is finished
Soniox detects when a Portuguese speaker has actually completed their thought, not just when they pause.
Know who said what in Portuguese
Soniox separates Portuguese speakers in real time, so every word stays connected to the person who said it.
Estimate your Portuguese speech-to-text cost
Choose real-time or async transcription and set your monthly audio volume to estimate your Soniox API cost.
Pricing calculator
Stop overpaying for Portuguese speech AI
1,000 hours of audio / month
Pricing assumptions
Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.
Speech infrastructure for massive scale
Build on one API and deploy in your region
Use the same models and API everywhere, with in-region processing to meet latency, data residency, and regulatory requirements.
Available: US, EU, Japan, India
Coming soon: Korea, Australia, Canada, Saudi Arabia, UK, Brazil
Run mission-critical systems with confidence
- 99.9% uptime
Production-hardened infrastructure with monitoring and redundancy. - low-latency streaming
Process speech in real time with low latency for responsive voice applications. - Priority support
Severity-based incident response with direct access to the Soniox team.
"Before Soniox, our international users always had a noticeably different experience. Now accuracy and responsiveness match across all regions…it feels like one system instead of five."
Alon Yair CTO of Onvego
Portuguese speech-to-text use cases
Soniox is built for Portuguese voice applications where accuracy, latency, and reliability matter at scale.
Call center
Real-time transcription, agent assist, and searchable records for every Portuguese customer interaction.
Medical transcription
Accurate transcription of Portuguese clinical speech, including specialist terminology and patient documentation.
Media transcription
Fast, accurate transcripts of Portuguese audio and video content at any scale.
Speech analytics
Extract insights, trends, and signals from large volumes of spoken Portuguese conversation data.
Speech translation
Real-time or batch translation of spoken Portuguese content across 60+ languages with no loss of accuracy.
Voice agents
Low-latency, high-accuracy Portuguese speech input as the foundation for conversational AI products.
Start transcribing Portuguese speech from $0.10 per hour of audio.
Use Soniox in popular frameworks
Soniox integrates seamlessly with leading real-time communication platforms, AI frameworks, automation tools, and developer SDKs.
An open source framework and developer platform for building, testing, deploying, scaling, and observing agents in production.
Twilio is a cloud-based customer engagement platform (CPaaS) that provides APIs, allowing developers to integrate voice, messaging (SMS, WhatsApp), email, and authentication capabilities into applications.
Open-source development framework designed to build applications powered by large language models (LLMs).
The open-source AI toolkit designed to help developers build AI-powered applications and agents with React, Next.js, Vue, Svelte, Node.js, and more.
Open-source AI SDK with a unified interface across multiple providers. No vendor lock-in, no proprietary formats.
n8n is a powerful, low-code/pro-code workflow automation tool that connects various applications, APIs, and databases to automate tasks.
Build the next generation of voice products, from agents and wearables to dictation, translation, and real-time multilingual experiences.
Go global with one API
Get production-ready speech-to-text recognition, transcription, and translation in 60+ languages.
Privacy and compliance, built right in
Never stored, never saved.
Audio stays in memory, everything is processed in real-time.
Built for privacy-critical use cases.
Adhering to leading global security, privacy, and compliance standards.
Trusted where privacy matters most.
Used in industries where speech is sensitive, from healthcare to enterprise.
Frequently asked questions
Does Soniox support real-time speech-to-text for Portuguese?
How accurate is Soniox for Portuguese?
Can Soniox handle mixed-language speech involving Portuguese?
Does Soniox support real-time translation from and to Portuguese?
Can Soniox recognize numbers, names, and alphanumerics in Portuguese?
Does Soniox support speaker identification in Portuguese?
Can I improve accuracy for domain-specific Portuguese use cases?
Where is Portuguese speech data processed and stored?
How does Soniox handle privacy and data security?
Is Soniox suitable for production and enterprise workloads in Portuguese?
- Sub-200ms streaming latency
- Production-hardened infrastructure
- Priority enterprise support
How do I get started?
Get started with the Soniox API
Create an account instantly, or contact us to design a custom package for your business.
Build with APIDocumentation
Get up and running in minutes and spend your time building, not wrestling with the API.
Explore docsSee what you’ll pay
Pay only for what you use with our flexible pricing. Built to scale with you.
Pricing details