Heidi Health vs TORTUS (2026)
Both are strong on governance and they answer different questions with it. Heidi answers what the organisation is certified to do, holding ISO 42001, ISO 27001, ISO 9001 and a SOC 2 Type II across all five criteria, with region appropriate residency and 110 languages. TORTUS answers what the system actually does wrong, publishing a hallucination removal rate, a peer reviewed reduction in major hallucinations and an error ontology built from clinician labelled transcripts, with accent performance tested by the deploying hospital rather than by the vendor. Certification tells you an organisation is managed; measurement tells you a model behaves. For an NHS deployment TORTUS is the deeper choice and is already embedded in that estate. For anywhere else, Heidi is the practical one, because it ships in 190 countries with published prices and TORTUS is evidenced almost entirely inside one health service.
- Reach and availability. 110 languages, 190 countries and more than 200 specialties, with region appropriate data residency operated per market, against a product whose evidence and integrations sit inside the NHS estate.
- You can price it and start today. A free tier with unlimited transcription and a Clinician tier at 150 dollars per user per month billed annually, where the alternative is procured through integrated care board approvals and partner channels with no published price.
- The certification stack is broader and independently examined: ISO 42001 for AI management, ISO/IEC 27001:2022, ISO 9001 and a SOC 2 Type II scoped to all five trust services criteria including privacy.
- It measures its own errors and publishes them, removing 92.7 percent of detected hallucinations before the clinician sees the draft, with a 75 percent reduction in major hallucinations published in npj Digital Medicine rather than asserted in marketing.
- Accent testing was performed by the deploying hospital, which states publicly that transcription held accurate across a wide variety of accents. Heidi publishes no accuracy or benchmark figure of any kind, which is the one weak seam in an otherwise strong record.
- The setting spread is the most unusual in this category, covering ambulance clinical hubs, emergency departments, outpatients and paediatrics on one platform. Pre hospital documentation appears nowhere else in this index and is a harder acoustic environment than an office visit.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Heidi Health and TORTUS 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 | Heidi Health | TORTUS |
|---|---|---|
| Primary category | Ambient Scribes | Ambient Scribes |
| Founded | 2021 | 2022 |
| Headquarters | Melbourne, Australia | London, United Kingdom |
| Website | heidihealth.com | tortus.ai |
Side by Side
Each record in one paragraph
Written to be quoted whole. Each paragraph states what the AI Health Index verified about the vendor, with the caveats attached. Generated from this pair’s live capability grades, so it moves when a grade moves.
The AI Health Index awards Heidi Health its top capability grade on several axes, including AI Centrality, AI Safety and PHI Stewardship and Security Certifications and Trust Center. Set against TORTUS, Heidi Health grades higher on Security Certifications and Trust Center, Deployment Model and Data Residency and Commercial Transparency. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
The AI Health Index awards TORTUS its top capability grade on several axes, including AI Centrality, Autonomy and Oversight Model and Model and Technology Transparency. Set against Heidi Health, TORTUS grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Clinical and Operational Evidence. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
Questions buyers ask
Should we choose Heidi Health or TORTUS?
On the axes where the AI Health Index separates them, Heidi Health grades higher on Security Certifications and Trust Center, Deployment Model and Data Residency and Commercial Transparency, and TORTUS grades higher on several axes, including Autonomy and Oversight Model, Model and Technology Transparency and Clinical and Operational Evidence. TORTUS leads on the greater share of scored axes, but the split means the decision turns on which constraint is binding rather than on an overall winner.
Where do Heidi Health and TORTUS differ most?
The widest separation the AI Health Index records between Heidi Health and TORTUS is on Commercial Transparency, where Heidi Health grades A and TORTUS grades C. That axis sits in the Commercial group, so it should carry the most weight for a buyer whose binding constraint is contracting, scope and what the price actually covers.
Where do Heidi Health and TORTUS grade the same?
The AI Health Index grades Heidi Health and TORTUS the same on several axes, including AI Centrality, Model Supply Chain Disclosure and AI Safety and PHI Stewardship. Neither holds an advantage the index can evidence on those axes, so they should not carry weight in a selection between these two.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Ambient Scribes page.
TORTUS asserts HIPAA alignment through third party listings with no business associate agreement template or scope statement located, so a United States buyer cannot verify the claim before contracting, and its UKCA Class I registration is self certified rather than regulator reviewed. Heidi gates its push to chart integration behind the Practice tier and above.
Its business associate agreement is not tier gated: the vendor's HIPAA page states it makes one available to every covered entity it works with. Corrected 13 September 2026. Third party review of Heidi reports that the scribe does not adaptively learn a clinician's style and that multi problem visits document less reliably than single problem encounters, both worth testing in a pilot.