What Sonde Health does

Sonde Health is a Boston-based digital medicine company, founded in 2015 and spun out of PureTech Health, that has built a voice-based health monitoring platform using AI/ML-driven vocal biomarker analysis. The platform processes short voice samples (typically 30 seconds, 6 seconds for respiratory) to generate biomarkers across four modular solutions: Mental Fitness (depression and anxiety screening), Cognitive Fitness (mental effort and cognitive performance tracking), Respiratory Fitness (COVID-19, asthma, COPD detection), and Stress Biomarker. Underlying the application layer are proprietary audio signal processing, speech science, and machine learning pipelines trained on more than 1.2 million medically-labeled voice samples from 85,000+ individuals across four continents, with deployment options spanning cloud, edge, and embedded-on-chipset inference.

The company operates three go-to-market motions: direct B2B enterprise sales to industrial, healthcare, and government buyers; API/SDK licensing to developers and health-focused applications; and OEM embedding into consumer devices, notably through partnerships with Qualcomm for Snapdragon AR1 Gen 1 (smart glasses/AR) and Snapdragon S7+ Gen 1 (hearing aids, earbuds, headphones). Revenue streams are predominantly recurring: enterprise subscriptions for the Sonde Enterprise Performance workforce platform, API/SDK licensing fees, and per-use health check pricing for consumer and screening applications. Select enterprise and clinical customers include SHI International (COVID-19 screening, 65,000+ health checks), GN Group, Cognitive Behavior Institute, Massachusetts General Hospital (MassAITC cognitive impairment pilot), the Department of the Air Force (SBIR Phase II contract), and Together AI (Mental Vitals feature, 20%+ of daily active users).

Sonde has raised $35.25 million in total funding, with a $19.25 million Series B closed in December 2022 led by Partners Investment and supported by NEOM Company, KT Corporation, and existing investors including co-founder PureTech Health and M Ventures. Footprint spans Boston (headquarters), New York, Denver, Mumbai, and Seoul. Certifications include SOC 2 Type 1 and Type 2, HIPAA, GDPR, FDA Breakthrough Device designation, and NIST CSF 2.0 in progress. Notable competitive risks include vocal biomarker model commoditization by large foundation-model speech APIs, slower-than-expected OEM adoption at Qualcomm licensees, and the need to demonstrate reproducible clinical utility across geographies outside the US.

Name

Sonde Health

Legal name

Sonde Health, Inc.

Website

https://www.sondehealth.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

11–50 employees

Short description

Sonde Health is a Boston-based digital medicine company that uses AI-powered vocal biomarker analysis to detect mental, cognitive, and respiratory health conditions from short voice samples, serving industrial enterprises, healthcare providers, and consumer device manufacturers via API/SDK licensing and enterprise subscriptions.

Ownership category

akta.pro rank

Product category

Digital Health / Vocal Biomarker Software

NAICS

Medical and Diagnostic Laboratories (62151)

SIC

Surgical & Medical Instruments & Apparatus (3841), Services-Prepackaged Software (7372), Services-Health Services (8000)

akta.pro primary industry

SaMD – Digital Biomarkers & Algorithmic Endpoints (HLACANAF)

akta.pro secondary industries

DTx/SaMD Evidence, Outcomes & Real-World Data (RWE) Platforms (HLACANAM), SaMD – Imaging & Signal Analysis (AI/ML) (HLACANAG)

Keywords

• Vocal biomarker analysis
• Digital health monitoring
• Voice-based diagnostics
• Mental health screening
• Workforce wellbeing platform

Headquarters

HQ city

Boston

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. API/SDK Licensing: Licensing of Sonde's vocal biomarker API/SDK to enterprise customers, health-focused companies, organizations, and providers to integrate voice-based health tracking into their offerings.
2. Enterprise Platform Subscription: Sonde Enterprise Performance platform for workforce wellbeing monitoring sold to industrial enterprises, offering real-time health insights and organizational dashboard access.
3. Per-Use Health Checks: Pricing model at a few cents per health check when used daily for respiratory symptom monitoring.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

Sonde Health develops and licenses a clinically validated vocal biomarker platform that analyzes short voice samples (6–30 seconds) to detect and monitor mental, cognitive, and respiratory health conditions. The platform is delivered via API/SDK to enterprise customers, device manufacturers (OEMs), and health partners for integration into their apps, devices, and workforce wellness programs. The company also sells a workforce wellbeing enterprise platform and consumer/enterprise health screening apps.

Product overview

Sonde Health offers a vocal biomarker platform with modular health solutions. The core Sonde Vocal Biomarker API/SDK Platform enables voice-based health monitoring through apps and devices. Four distinct health solutions are built on this platform: Mental Fitness for depression and anxiety detection, Cognitive Fitness for cognitive health tracking, Respiratory Fitness for pulmonary condition monitoring, and Stress Biomarker for stress level assessment. The Enterprise Performance Platform bundles these capabilities for workforce health management with dashboard analytics and population health insights. The platform processes everyday speech to deliver continuous, non-invasive health monitoring.

Differentiator

Problem solved

Functional benefit

Brands

• Sonde Mental Fitness: Voice-based mental fitness tracking platform that monitors depression and anxiety through vocal biomarkers
• Sonde Cognitive Fitness
• Sonde Respiratory Fitness
• Sonde One
• Sonde Enterprise Performance
• SurveyLex
• Mental Vitals

Products and services

• Mental Fitness Clinically validated voice-based mental health tracking platform that analyzes vocal biomarkers to assess mental fitness and detect symptoms of depression, anxiety, and related conditions through 30-second voice samples. Targeted at enterprise workforces, healthcare providers, and consumer health partners.
• Cognitive Fitness Voice-based cognitive health monitoring solution that measures mental effort and cognitive state using acoustic and prosodic voice features. Helps detect mild cognitive impairment and track cognitive performance over time.
• Respiratory Fitness Clinically validated voice-based respiratory health tracking platform that detects and monitors symptoms of COVID-19, asthma, COPD, and other pulmonary conditions from 6-second voice samples with approximately 70% accuracy.
• Stress Biomarker Voice-based stress tracking solution that analyzes subtle changes in tone, strain, and speech flow to generate real-time stress scores reflecting the user's current stress response state.
• Enterprise Performance Platform Workforce health management platform combining Mental Fitness and Cognitive Fitness solutions. Provides real-time visibility into workforce health trends, risk stratification, compliance tracking, and ROI analysis for industrial enterprises.
• Sonde Vocal Biomarker API/SDK Platform Core vocal biomarker platform enabling voice-based health monitoring. Provides API and SDK for integrating vocal biomarker analysis into partner apps and devices, delivering continuous insights into mental, cognitive, and respiratory health from everyday speech. Supports cloud, edge, and embedded deployment.
• Sonde One Mobile app for daily health screening using voice analysis, particularly used for COVID-19 respiratory symptom screening before workplace entry. Deployed by enterprise customers such as SHI International.
• SurveyLex Survey-building platform for creating voice-based research protocols and collecting voice data in clinical studies. Includes validated protocols from published vocal biomarker research, sold to pharmaceutical, academic, and clinical research customers.

Quantifiable outcome

• Projected ROI exceeding 15x in industrial enterprise deployments
• +5 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration10 records

AI capability3 records

Feature6 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Qualcomm TechnologiescoreTechnology or Integration · 6 November 2025Collaboration to embed Sonde's vocal biomarker platform into devices powered by Snapdragon AR1 Gen 1 processor for smart glasses and AR glasses, enabling ambient wellness monitoring through everyday speech analysis.
• Saaya HealthcoreStrategic or Co-development Partner · 8 May 2025Strategic partnership delivering comprehensive performance health tracking and proactive support to enterprises employing large blue-collar workforces. Combines Sonde's vocal biomarkers with Saaya's mental health support services.
• Qualcomm Technologies (Snapdragon S7+ Gen 1)coreTechnology or Integration · 9 January 2025Integration of Sonde's voice-based health monitoring technology into Qualcomm's Snapdragon S7+ Gen 1 Sound Platform for hearing aids, earbuds, headphones, and wearables.
• AFWERX / Department of the Air ForcecoreStrategic or Co-development Partner · 26 August 2024SBIR Phase II contract ($1,215,606) for developing voice-based mental health monitoring solutions for Department of the Air Force personnel.
• Together (AI Health Assistant)coreTechnology or Integration · 1 November 2023Sonde powers Together's Mental Vitals feature for early detection of depression and anxiety. Over 20% of Together's daily users are already using the Sonde-powered feature.
• Massachusetts General Hospital (MGH)coreStrategic or Co-development Partner · 27 February 2023Collaboration on MassAITC pilot study for remote detection and monitoring of mild cognitive impairment using vocal biomarkers in older adults' home environments.
• Koye PharmaceuticalscoreStrategic or Co-development Partner · 26 August 2022Multi-year partnership to develop vocal biomarker detection and monitoring capability for COPD in India. Sonde's first partnership with a pharmaceutical company.
• Michigan State UniversityminorStrategic or Co-development Partner · 22 June 2022Research collaboration to assess COVID-19 impact on physical activity and mental health in Africa, partnering with universities in Botswana, Ghana, Tanzania, and Nigeria.
• GN GroupcoreStrategic or Co-development Partner · 18 January 2022Strategic partnership for voice AI performance tracking. GN Group integrates Sonde technology to give people insights on how their bodies work and put metrics to the brain.

Scale indicators12 records

Recent moves7 records

Expansion highlights7 records

Direct peers

• Ellipsis Health: Voice-based mental health biomarker company that analyzes speech to detect anxiety and depression. Closely comparable to Sonde's Mental Fitness product in technology, clinical validation approach, and target customers (health plans, providers, employers).
• Kintsugi: Develops voice biomarker software for real-time detection of depression and anxiety from short voice samples. Directly competes with Sonde Mental Fitness in the digital mental health biomarker category, serving payers, providers, and digital health platforms via API.
• Canary Speech: Voice biomarker platform that uses machine learning on speech to identify cognitive and behavioral health conditions. Comparable to Sonde in vocal biomarker technology, clinical focus areas (mental health, neurological), and enterprise/B2B go-to-market.
• Winterlight Labs: Speech analysis company focused on cognitive health assessment, including dementia and Alzheimer's detection from voice samples. Overlaps with Sonde Cognitive Fitness in technology and clinical end markets, particularly pharma trials and neurology research.
• Modality.AI: AI-driven speech assessment platform for neurological and psychiatric conditions, including depression, ALS, and Parkinson's. Comparable to Sonde in clinical validation focus and remote monitoring use cases for mental and cognitive health.

Emerging players

• Element Science: Digital health company developing wearable cardiac monitoring devices. Less direct overlap, but comparable as a PureTech Health-backed digital therapeutics/digital medicine company pursuing FDA-cleared monitoring products.
• Evidation Health: Digital health measurement platform that aggregates passive and active data to detect health changes. Comparable to Sonde in digital biomarker and real-world data approach, serving similar enterprise, pharma, and research customers.
• Mindstrong (historical): Formerly a digital biomarker company using smartphone interaction patterns to detect mental health conditions; wound down operations. Useful as a historical comparable for the voice/digital biomarker space, illustrating both the opportunity and the execution risks Sonde faces.

Broad incumbents

• Headspace Health: Large mental health and wellness platform offering therapy, coaching, and meditation. Overlaps with Sonde in workforce mental health/wellness use cases, but delivers intervention services rather than biomarkers; could be a partner or competitive distribution channel.
• Apple (Apple Health): Consumer health platform integrated across iPhone, Apple Watch, and AirPods, with growing speech and respiratory health research. Relevant as a potential platform competitor or distribution partner for Sonde's vocal biomarker technology on iOS.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/sondehealth

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds4 records

Investors10 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sonde Health