Corti vs Heidi Health (2026)
Two answers to where clinical audio lives and who controls it. Heidi runs residency by region, holding US data for US users and Canadian data only in Canadian data centers, discards audio as soon as it is transcribed, and backs that with ISO 42001, ISO 27001, ISO 9001 and a SOC 2 Type II covering all five trust services criteria. Corti goes further toward control, with a sovereign cloud that runs on any cloud or on premise so recordings can stay inside a health system's own infrastructure, plus EU or US instances with no cross border transfer. The practical split is what you are buying. Heidi is a finished product with published prices from a free tier. Corti is infrastructure you build on, with FactsR for live fact by fact review. If you want to deploy this quarter, start with Heidi. If you want to own the stack, start with Corti.
- Recordings can stay inside a health system's own infrastructure, on a sovereign cloud that runs on any cloud or on premise, with per customer encryption keys.
- FactsR moves review into the visit, surfacing discrete clinical facts as the consultation unfolds for the clinician to accept or adjust live.
- Certifications are named and dated, including ISO/IEC 27001 renewed in June 2026, ISO/IEC 42001 for AI management, SOC 2 Type II and BSI C5 Type II, and its assistant is registered as a Class I medical device in the UK and the EU.
- It is ready to use and priced in public, with a free tier, Clinician at $110 per user a month billed annually, and Teams priced on request.
- Residency is set by region, with US data held for US users and Canadian information stored only in Canadian data centers, and audio is discarded as soon as it is transcribed.
- Heidi holds ISO 42001 for AI management alongside ISO 27001, ISO 9001 and a SOC 2 Type II covering all five trust services criteria, privacy included.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Corti and Heidi Health are each graded against the same capability taxonomy, from each vendor's own public materials and the regulatory record, under the AI Health Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Fact | Corti | Heidi Health |
|---|---|---|
| Primary category | Ambient Scribes | Ambient Scribes |
| Founded | 2016 | Not recorded |
| Headquarters | Copenhagen, Denmark | Melbourne, Australia |
| Website | corti.ai | heidihealth.com |
Side by Side
Select any grade to read the note behind it.
Product updates
The latest logged changes from each vendor, newest first, each linked to its source.
Corti
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Product / capability
Corti's Symphony for Medical Coding made ICD-O-3, the WHO oncology classification used by cancer registries, generally available in English, German and French editions, returning topography and morphology codes as a pair.
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Model / architecture
Corti moved the frontier tier behind its corti-s1 and corti-s1-instant model IDs from GLM 5.2 to GLM 5.3 on its EU infrastructure.
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Model / architecture
Corti released updated speech to text models for German, for Germany and Switzerland, and French, for France and Switzerland.
Source
Heidi Health
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Clinical evidence
Heidi Health released an impact report analyzing five real-world pilots across Ontario, Canada, involving 333 active clinicians and over 111,000 documented patient visits.
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Pricing / packaging
Heidi restructured its pricing in February 2026 and moved upmarket.
Source
Each vendor in one paragraph
Written to be quoted whole. Each paragraph opens the AI Health Index profile of the vendor: what the product is, who buys it and what it does.
Corti is a Copenhagen company that builds healthcare AI models and sells them as infrastructure. Developers and EHR companies reach its speech recognition, clinical note generation, medical coding for ICD-10 and CPT, and an agent framework through APIs and SDKs, and Corti also ships its own application, Corti Assistant, including a version registered as a Class I medical device in the UK and the EU.
Source: AI Health Index, August 2026
Heidi is a global ambient AI scribe that generates structured clinical notes from the patient encounter. It reports more than 175 million patient interactions supported across more than 190 countries, and solutions are published for family medicine, specialists, nurses, mental health, allied health, dentists, veterinarians and trainees.
Source: AI Health Index, August 2026
Questions buyers ask
How do Corti and Heidi Health work with the EHR?
For Corti, the API streams audio, extracts facts and generates structured notes for a partner to write into its EHR.
With Heidi Health, the Teams integrations reach the main hospital and ambulatory systems. For Epic, Heidi describes ambient documentation, structured writeback and clinical task automation across Hyperspace, Hyperdrive and Haiku. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified August 4, 2026. No vendor pays for placement.
How are Corti and Heidi Health priced and sold?
Corti gives new accounts $50 of free credits and then charges pay as you go, with speech to text at $0.0065 a minute and note generation, medical coding and agents at $4 per million input tokens and $16 per million output tokens, all drawn from one credit wallet.
For Heidi Health, a Max seat carries five times the usage allowance of a Standard seat for agents and Routines, and costs $299 per user per month billed annually. Scribing and evidence questions never draw on that allowance, and Heidi says it never charges overages. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified August 4, 2026. No vendor pays for placement.
How do Corti and Heidi Health handle patient data?
Corti's data processing agreement keeps personal data for the life of the contract and deletes it 30 days after termination.
In Heidi Health's case, data is never used for secondary purposes such as model training or commercialization, and clinical data is never shared or sold. Identifiable details are removed from transcripts and notes and processed separately from the rest. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified August 4, 2026. No vendor pays for placement.
Which settings and specialties do Corti and Heidi Health cover?
Corti started in emergency call triage and now documents primary care, telehealth and hospital ward care, with NHS Grampian using it on a ward at Inverurie Hospital and other NHS trusts working with it elsewhere in the UK. Language coverage is built model by model, with clinical speech models for Danish and French among them, rather than claimed across a long list.
With Heidi Health, the company reports around 2.8 million patient visits a week in 110 languages from 190 countries, and states coverage of more than 200 specialties. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified August 4, 2026. No vendor pays for placement.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers.
Heidi's EHR integration comes with its Teams plan, priced on request. An earlier version of this comparison said Heidi's business associate agreement was gated the same way and that its lower tiers could not be used in production; Heidi's HIPAA page makes the agreement available to every covered entity it works with, with no tier condition. That statement was corrected on 13 September 2026.
Corti publishes no business associate agreement position, and its evidence is research on its models and a 2026 KLAS First Look score rather than a study of documentation in care. Heidi's published research is three preprints by its own team using simulated visits or synthetic speech.