Ambience Healthcare
AI medical scribe and ambient clinical documentation platform for US health systems — real-time conversation capture, structured clinical-note generation, specialty-tuned templates and an Inpatient CDI module (built on OpenAI) deployed across 30+ health systems including UCSF Health, John Muir Health, Houston Methodist and Cleveland Clinic, with Epic Toolbox program inclusion.
The Business
Ambience Healthcare builds AI medical scribe and ambient clinical-documentation infrastructure for US health systems — real-time capture of the in-room patient-clinician conversation, structured clinical-note generation across specialty-tuned templates, and an Inpatient CDI (Clinical Documentation Integrity) module that BusinessWire reporting identifies as built on OpenAI. The company was founded in 2020 in San Francisco by Mike Ng (co-founder, now President & Chairman) and Nikhil Buduma (co-founder, now CEO since 22 September 2025), with OpenAI Startup Fund on the cap table from the seed round — the structural underpinning for the deep OpenAI relationship across both funding and foundation-model layers. By the July 2025 Series C Ambience had raised approximately $345M cumulatively at a $1.25B post-money valuation, with Oak HC/FT and Andreessen Horowitz leading and OpenAI Startup Fund, Kleiner Perkins and Optum Ventures returning. Product surface spans the ambient-scribe core, specialty-tuned documentation flows across primary care and specialty practice, and the Inpatient CDI module — the differentiated bet against Abridge’s broader installed-base position.
Customers and Distribution
Ambience serves 30+ US health systems with named flagship deployments at UCSF Health, John Muir Health, Houston Methodist, Memorial Hermann, the Oncology Institute and the GI Alliance, plus the Cleveland Clinic 5-year exclusive partnership selected over five competing scribes — the highest-signal reference print in the company’s installed base and the principal evidence supporting the D1c portability-and-substitutability sub-rubric score of 8. Sacra reports approximately 13% market share at the #2 position in the ambient-scribe cohort behind Abridge. Distribution rides Epic Toolbox program inclusion as the workflow channel into the Epic-native health-system base, with a direct-to-health-system enterprise GTM motion under Chief Commercial Officer Eric Kim that the P3c GTM-maturity sub-rubric scores 8 on. Revenue trajectory anchors at $19M ARR YE 2024 to $30M ARR May 2025 — a +58% increase over five months on a five-year-old company — the P1d time-to-revenue stage-appropriateness sub-rubric scores 7 on this evidence. The 100% US footprint is a deliberate concentration consistent with the apps_vertical bet on US-specific clinical-AI workflow; no UK / EU / APAC expansion has been announced.
Model Strategy
Ambience’s defining technical asset is the specialty-tuned template engine plus the Inpatient CDI module — the per-specialty clinical-content layer that makes the Epic Toolbox program inclusion a multi-quarter clinical-validation project to replicate, and the principal portability constraint that the D1c portability-and-substitutability sub-rubric scores 8 on. HL7 / FHIR standards are theoretically available as the industry export path, but per-specialty template tuning and the Epic Toolbox-resident integration make migration a workflow-validation project rather than a configuration switch. Foundation-model strategy is single-frontier-model on the disclosed evidence: OpenAI Startup Fund is on the cap table from the seed round and the Inpatient CDI module is built on OpenAI per BusinessWire reporting — the D4a supplier-diversity sub-rubric scores 4 on this evidence with single-frontier-model dependency as the structural risk. Multi-model routing is not publicly disclosed. Infrastructure operates HIPAA-compliant audio channels per the company website; the D4c regulatory-exposure sub-rubric scores 5 against the regulatory_high context flag flagged in the brief and against rising FDA scrutiny on clinical AI. No FDA approval is disclosed at time of writing.
At A Glance
The Numbers
Trend charts are not shown for Ambience Healthcare — only single-point data is currently available. See At A Glance above for the most recent disclosed values.
Leadership Team
Co-founders Mike Ng (now President & Chairman) and Nikhil Buduma (now CEO since 22 September 2025) remain the founder team; the prior listing of a "Brendan Fitzgerald, CTO" appears to have been a fabrication (likely confusion with Brendan Fortuner, Head of Engineering); the D4e key-person-dependency sub-rubric scores 6 on a founder-team-led structure that is executing well across funding, product and customer dimensions. C-suite layer below the founders is materially less disclosed than at later-stage peers; further public C-suite disclosure would lift the bench-depth print at the next evidence pass.
IM Framework Scoring
IM’s structured assessment of Ambience Healthcare’s competitive position. The summary below is the headline; expand “Show the full analyst-grade analysis” near the bottom for the per-dimension reasoning and evidence. Methodology →
Funding History
| Date | Round | Raised | Post-money | Lead investor(s) |
|---|---|---|---|---|
| Jul 2025 | Series C | $243M | $1.25B | Oak HC/FT, Andreessen Horowitz |
| Feb 2024 | Series B | $70M | — | Kleiner Perkins, OpenAI Startup Fund |
| 2022 | Series A | Undisclosed | — | Kleiner Perkins, OpenAI Startup Fund |
| 2020 | Seed | Undisclosed | — | OpenAI Startup Fund |
Cumulative ~$345M raised through the July 2025 Series C at $1.25B post-money — the round crossed the $1B mark and was led by Oak HC/FT and Andreessen Horowitz, with OpenAI Startup Fund, Kleiner Perkins and Optum Ventures returning on the cap table. Round-by-round figures from Fierce Healthcare, statnews and BusinessWire coverage of the Series C announcement; earlier-round figures from BusinessWire and Sacra company profile. OpenAI Startup Fund has been on the cap table since the seed round, which is the structural underpinning for the Inpatient CDI module being built on OpenAI.
Competitive Landscape
Ambience’s competitive set sits in three concentric rings: the closest independent rival on capability and EHR-integration breadth (Abridge, with a broader 200+ health-system installed base), incumbent ambient-scribe platforms inside larger parents (DAX Copilot / Microsoft-Nuance and Augmedix inside Commure), and the workflow-assistant and SMB flanking plays (Suki AI and Heidi Health). The standout competitive cut is the Abridge head-to-head on US large-health-system procurement, where Ambience holds the Epic Toolbox program slot plus the Cleveland Clinic 5-year exclusive reference and Abridge holds the broader installed base.
| Competitor | Positioning | Distribution edge | Threat profile |
|---|---|---|---|
| Abridge | Ambient AI clinical documentation grounded in the Contextual Reasoning Engine and Ghostwriter platform, with deep Epic Hyperdrive / Haiku and Oracle Cerner integration; 200+ US health-system installed base. | Direct-to-health-system enterprise GTM with the broadest US health-system installed base in the cohort, including UPMC scaling to 12,000 clinicians and Kaiser Permanente’s industry-largest generative-AI deployment. | High — the closest independent rival; competes head-to-head on the ambient-scribe selection committee with the broader installed base and the Best in KLAS 2026 ambient-speech recognition. |
| Suki AI | AI clinical-documentation assistant with a workflow-assistant framing rather than ambient-only; supports clinician dictation, ambient scribing and EHR-task automation. | Direct to health-system IT and clinician channels; partnerships with Epic, Oracle Cerner, MEDITECH and athenahealth on documentation workflows. | High — the workflow-assistant framing flanks the ambient-only positioning Ambience occupies; competes for the same EHR-integration procurement slot. |
| DAX Copilot (Microsoft (Nuance)) |
Ambient clinical documentation grounded in the Nuance Dragon Medical legacy installed base; rebuilt as DAX Copilot under Microsoft post the Nuance acquisition. The incumbent ambient-scribe in the US health-system market. | Microsoft enterprise sales motion plus the Nuance Dragon Medical installed base across US health systems; Azure-native deployment. | High and asymmetric — the symmetric incumbent on health-system procurement; deepest installed-base distribution and the Microsoft Cloud for Healthcare bundle that Ambience cannot match standalone. |
| Augmedix (Commure (acquired Jul 2024)) |
Remote-scribe and ambient AI documentation; combines human medical documentation specialists with AI assistance. Acquired by Commure for ~$139M in July 2024. | Commure’s broader US health-system go-to-market with embedded clinical-workflow software; long-running health-system contracts inherited from Augmedix’s independent years. | Medium — the human-plus-AI model is structurally higher cost per encounter than pure-ambient AI; threat is the Commure-channel breadth rather than the standalone product. |
| Heidi Health | Ambient AI medical scribe with a faster self-serve onboarding motion than the enterprise health-system incumbents; clinician-direct distribution including SMB and mid-market practices. | Self-serve and direct-to-clinician GTM; international footprint (Australia, UK, US) that is differentiated against the US-centric Ambience positioning. | Medium — flanking risk on the SMB / mid-market segment Ambience under-serves, and on international clinician adoption where Ambience has no announced presence. |
Pricing benchmark: ambient-scribe pricing in the US health-system market is generally enterprise-negotiated per-clinician-per-month, with reported figures clustered in the $200-600 / clinician / month range for the named-incumbent set; Ambience has not publicly disclosed list pricing. The competitive cut is on Epic Toolbox program inclusion, specialty-template breadth, the Inpatient CDI module (built on OpenAI) and reference-customer ROI prints rather than headline per-seat price.
Potential Risks
The case for Ambience at IM Framework 7.00 rests on the Epic Toolbox program slot, the Cleveland Clinic 5-year exclusive partnership selected over five competing scribes, the 30+ named-health-system installed base (UCSF Health, John Muir Health, Houston Methodist, Memorial Hermann, Oncology Institute, GI Alliance), the $30M ARR May 2025 print (+58% in five months) and the $243M Series C at $1.25B post-money. The case against splits into five risks of differing magnitude — with the symmetric-incumbent head-to-head with Abridge the most active and the single-frontier-model dependency on OpenAI the most structural framing constraint.
Symmetric-incumbent head-to-head — Abridge on US large-health-system procurement
Abridge competes for the same US large-health-system ambient-scribe procurement slot with a broader 200+ installed base, the Best in KLAS 2026 ambient-speech recognition, the UPMC scale-out to 12,000 clinicians and Kaiser Permanente’s industry-largest generative-AI deployment. Ambience wins on the Epic Toolbox program slot and the Cleveland Clinic 5-year exclusive selected over five competing scribes; Abridge wins on installed-base breadth and KLAS positioning. The risk is procurement-cycle defaulting to the larger installed base on multi-year renewals.
Single-frontier-model dependency — OpenAI on the cap table and inside the Inpatient CDI module
OpenAI Startup Fund has been on the Ambience cap table since the seed round and the Inpatient CDI module is built on OpenAI per BusinessWire reporting — the D4a supplier-diversity sub-rubric scores 4 on this evidence. Multi-model routing is not publicly disclosed. The asymmetric risk is OpenAI itself: a frontier-model provider that is simultaneously a cap-table partner, a foundation-model supplier and a potential horizontal-clinical-AI competitor at the foundation-model layer. Public multi-model-routing disclosure would materially lift this score at the next evidence pass.
Regulatory exposure — HIPAA-compliant audio channels and rising FDA scrutiny on clinical AI
Ambience operates HIPAA-compliant audio channels per the company website; the D4c regulatory-exposure sub-rubric scores 5 against the regulatory_high context flag flagged in the brief. FDA scrutiny on clinical AI is rising and the 2026 HIPAA Security Rule changes flagged industry-wide require increased cybersecurity investment for HIPAA-regulated entities. Clinical-documentation AI sits in an evolving regulatory grey zone with active state-level AI-in-clinical-care rulemaking. No FDA approval is disclosed.
Valuation-to-revenue ratio and 2026 capital-markets compression risk
$1.25B post-money on a $30M ARR May 2025 print is approximately 42x — a premium multiple justified by the +58% ARR growth over five months and the Epic Toolbox program slot plus the Cleveland Clinic 5-year exclusive, but with compression risk if growth slows or if Abridge or DAX Copilot materially close the workflow-integration gap. The Series C closed in July 2025; the next priced round will reset the multiple against a higher-ARR base and a more crowded competitive set.
Founder-team concentration and below-founder C-suite disclosure gap
Mike Ng (now President & Chairman) and Nikhil Buduma (CEO since 22 September 2025) remain the public operational leadership pair; the founder team is executing well across funding, product and customer dimensions but the D4e key-person-dependency sub-rubric scores 6 on a structure where the C-suite layer below the founders is materially less publicly disclosed than at later-stage peers such as Abridge (CTO, COO, CCO, CFO all named in April 2026). Further public C-suite disclosure would reduce the founder-CEO concentration and lift the bench-depth print at the next evidence pass.
Recent IM Coverage
Show recent press coverage of Ambience Healthcare
- Jul 2025 — Ambience banks $243M Series C as investors continue to bet big on ambient AI.
- Jul 2025 — Ambience Healthcare raises $243M Series C at $1.25B valuation for AI medical scribe.
- 2026 — Epic adds Ambience Healthcare’s AI to its Toolbox program.
- 2026 — Ambience KLAS ROI report — reference-customer ROI prints across the installed base.
- Feb 2024 — Ambience Healthcare closes $70M Series B led by Kleiner Perkins and OpenAI Startup Fund.
- 2025 — Ambience Healthcare company profile and ARR trajectory analysis.
- 2025 — Ambience Healthcare partners with Cleveland Clinic on 5-year exclusive ambient AI scribe agreement.
Curated feed of named-source coverage from approved publications — named-author healthcare-IT press (Fierce Healthcare, Healthcare Innovation), tier-1 medical and tech press (STAT News), the company’s own announcement wire (BusinessWire) and analyst-research disclosures (Sacra free company profile). We exclude PR-wire reposts of the same release and unsourced “industry round-up” pieces.
Show the source register for the figures on this page
IM operates a primary-source-where-possible discipline. The figures above come from:
- Revenue — ARR trajectory: Sacra company profile records the ARR trajectory at $30M (May 2025), up from $19M YE 2024 — a +58% increase over five months — see Sacra Ambience profile. Ambience has not separately disclosed a primary ARR figure for FY2026 beyond the May 2025 print at time of writing.
- Customer base — 30+ US health systems: Ambience discloses 30+ US health-system deployments including UCSF Health, John Muir Health, Houston Methodist, Memorial Hermann, Oncology Institute, GI Alliance and the Cleveland Clinic 5-year exclusive partnership selected over five competing scribes — see Fierce Healthcare on the Epic Toolbox program inclusion and Fierce Healthcare on the KLAS ROI report. Sacra reports approximately 13% market share at the
- Leadership — founder team: Co-founder, President & Chairman Mike Ng (CEO Sep 2020 – Sep 2025) plus co-founder Nikhil Buduma (CEO since 22 September 2025); the prior listing of a "Brendan Fitzgerald, CTO" appears to have been a fabrication. See the Ambience website and the BusinessWire Series B announcement. C-suite layer below the founders is less publicly disclosed than at later-stage peers; further public C-suite disclosure would lift the bench-depth print at the next evidence pass.
- Funding to date — ~$345M raised at $1.25B post-money: $70M Series B February 2024 led by Kleiner Perkins and OpenAI Startup Fund per BusinessWire; $243M Series C July 2025 at $1.25B post-money led by Oak HC/FT and Andreessen Horowitz with OpenAI Startup Fund, Kleiner Perkins and Optum Ventures returning per Fierce Healthcare and STAT News.
Methodology & Disclaimer
For metric definitions, source-tier hierarchy, and decline-to-publish rules, see the tracker methodology. Confidence dots (• green / • amber / • red) follow the same convention as the AI Tracker.
Spotted a figure you believe is wrong? Send corrections to info@informationmatters.net.
Information Matters Framework scores are the considered opinion of the IM team — human and AI — applied to publicly-available evidence under a disclosed methodology. They are not statements of fact about the companies scored and they are not investment advice.
