Cleerly ISCHEMIA vs HeartFlow Analysis

Direct competitors — feature-level head-to-head below. Comparability 92/100 Comparability is an AI-graded 0–100 score of how directly these two tools compete — higher means a more apples-to-apples comparison.
by Cleerly
VS
by HeartFlow

AI Verdict

Cleerly ISCHEMIA and HeartFlow Analysis are direct competitors, both being FDA-cleared AI tools that analyze CCTA scans to provide non-invasive assessments of coronary artery disease. Cleerly focuses on vessel-level ischemia likelihood and FFR estimation, while HeartFlow leverages computational fluid dynamics for FFRct analysis and offers established reimbursement through specific CPT codes. Both aim to enhance personalized diagnosis and treatment planning for heart disease.

Choose Cleerly ISCHEMIA if…

Choose Cleerly ISCHEMIA if you require a comprehensive, vessel-level assessment of coronary artery disease that includes detailed plaque characterization (volume, type, location) and stenosis severity, alongside the likelihood of ischemia. This tool is ideal for understanding the full burden of atherosclerosis and guiding personalized treatment plans based on both anatomical and functional insights.

View Cleerly ISCHEMIA →

Choose HeartFlow Analysis if…

Choose HeartFlow Analysis if your primary clinical need is to non-invasively determine the functional significance of coronary stenoses through highly accurate Fractional Flow Reserve derived from CT (FFRct) analysis. This tool is particularly well-suited for situations where assessing the hemodynamic impact of a lesion is critical for guiding revascularization decisions and optimizing patient management.

View HeartFlow Analysis →

When choosing between Cleerly ISCHEMIA and HeartFlow Analysis, physicians should consider their primary diagnostic focus: detailed plaque characterization versus functional blood flow assessment. Both tools leverage AI to analyze CCTA scans for coronary artery disease (CAD) and provide non-invasive insights, but their core strengths differ. Cleerly ISCHEMIA excels at quantifying and characterizing coronary plaque (volume, type, and location) and assessing stenosis severity, offering a comprehensive anatomical view of atherosclerosis. It also determines the likelihood of vessel-level ischemia based on these characteristics.

HeartFlow Analysis, on the other hand, specializes in creating personalized 3D models of coronary arteries from CCTA scans and uses computational fluid dynamics to simulate blood flow, providing non-invasive Fractional Flow Reserve derived from CT (FFRct) values. This directly assesses the functional impact of blockages on blood flow to the heart. The key practical difference lies in Cleerly’s emphasis on the morphology and composition of plaque, while HeartFlow focuses on the hemodynamic significance of a stenosis.

Therefore, a physician primarily interested in understanding the extent and nature of plaque burden, including high-risk plaque features, for early detection and personalized treatment planning, might favor Cleerly ISCHEMIA. Conversely, if the main objective is to determine whether a known or suspected blockage is functionally limiting blood flow to guide revascularization decisions and avoid unnecessary invasive procedures, HeartFlow Analysis with its FFRct capabilities would be the more suitable choice.

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Quick Comparison

Feature Cleerly ISCHEMIA HeartFlow Analysis
Pricing Contact for details Contact vendor for pricing
Deployment Web-based platform; data transfer via Cleerly Proxy (VPN or virtual appliance) Cloud-based (AWS)
BAA Available Unknown Yes AI-estimated
FDA Status 1 AI-estimated Yes AI-estimated
HIPAA Unknown Yes AI-estimated

Head-to-Head

AI-generated assessment across six dimensions based on each tool's documented features and compliance posture. Grounded in public data — not a substitute for hands-on evaluation.

Usability

Tie

Both tools offer web-based or cloud-based platforms for analysis and reporting, suggesting good accessibility. Cleerly highlights 'comprehensive interactive web-based reports' and 'integration with PowerScribe via API' for streamlined workflow. HeartFlow emphasizes 'seamless clinical integration via upgraded workflow' and 'Roadmapu2122 Analysis' for efficient CCTA reading, along with quick patient results. Given both focus on intuitive interfaces and workflow integration, neither has a clear advantage in overall usability without direct user feedback.

Clinical Value

HeartFlow Analysis

Both are FDA-cleared and provide non-invasive assessment of CAD. Cleerly demonstrates high diagnostic accuracy and prognostic utility in trials like CREDENCE and PACIFIC, offering a '3-in-1 approach' for atherosclerosis, stenosis, and ischemia. HeartFlow boasts an extensive body of over '600 peer-reviewed publications', high accuracy against invasive FFR and IVUS, and has demonstrated a reduction in the need for invasive procedures and overall cost of care. HeartFlow's broader and longer-standing clinical evidence base and proven impact on patient pathways give it a slight edge.

Pricing & Value

HeartFlow Analysis

While both require contacting for pricing, HeartFlow provides significantly more transparency regarding reimbursement. It operates on a 'fee-for-service model' and is 'covered by Medicare and most U.S. commercial payers,' with established Category I CPT codes for FFRct Analysis (75580) and AI-Enabled Quantitative Plaque Analysis (75577 for 2026), and established CMS payment rates. This clear reimbursement pathway and broad coverage reduce financial uncertainty for providers, offering a stronger value proposition.

Enterprise Readiness

HeartFlow Analysis

Both tools are FDA-cleared, HIPAA compliant, and provide BAAs, indicating foundational readiness. However, HeartFlow explicitly states adherence to a broader range of international security and quality standards, including 'HITRUST, SOC 2 Type 2, ISO 13485, and ISO 27001'. Furthermore, HeartFlow has been adopted by 'more than 1,400 institutions' globally, including '80% of the top 50 heart hospitals in the U.S.', demonstrating a more extensive track record of enterprise-level deployment and trust.

Innovation

HeartFlow Analysis

Both are highly innovative in applying AI to non-invasive CAD diagnosis. HeartFlow's pioneering use of 'Computational Fluid Dynamics (CFD) for blood flow simulation' to derive FFRct represents a foundational and sophisticated technological innovation in the field. HeartFlow also leverages a 'proprietary data pipeline built from more than 160 million annotated CTA images'. While Cleerly offers a 'first-of-its-kind' approach with '37 measures of heart health' and a '3-in-1 approach', HeartFlow's deep integration of CFD for physiological assessment provides a distinct innovative edge.

Support & Docs

HeartFlow Analysis

HeartFlow provides a more detailed and comprehensive array of support services, including 'hands-on training,' 'expert coding support,' 'peer mentorship,' 'technology integration,' and 'case support'. This indicates a robust and multi-faceted support system designed for successful implementation and ongoing use within an enterprise setting. Cleerly also commits to customer success and provides resources like billing guidelines and patient education, but HeartFlow's listed services are more specific and extensive for enterprise clients.

Feature-by-Feature

Detail beyond the Quick Comparison summary. For pricing, deployment, BAA, FDA, and HIPAA see the Overview tab.

Feature Cleerly ISCHEMIA HeartFlow Analysis
Tool Name Cleerly ISCHEMIA HeartFlow Analysis
Company Cleerly HeartFlow
Core Analysis Method AI-enabled CCTA analysis AI-powered 3D modeling of coronary arteries from standard CT scans; Computational Fluid Dynamics (CFD) for blood flow simulation
Key Diagnostic Output Vessel-level ischemia likelihood determination; Non-invasive fractional flow reserve (FFR) estimation Fractional Flow Reserve derived from CT (FFRct) analysis
Plaque Characterization Coronary plaque characterization (volume, type, location) Plaque Analysis (quantification and characterization)

Videos

Demos, reviews, and walkthroughs featuring Cleerly ISCHEMIA and HeartFlow Analysis.

Loading videos…
Videos need JavaScript to load. Search YouTube directly →

View all on YouTube

Frequently Asked Questions

Cleerly ISCHEMIA non-invasively determines the likelihood of coronary artery ischemia at a vessel level and provides non-invasive fractional flow reserve (FFR) estimation, alongside coronary plaque characterization and stenosis severity assessment. HeartFlow Analysis focuses on Fractional Flow Reserve derived from CT (FFRct) analysis, utilizing computational fluid dynamics for blood flow simulation, and also offers plaque analysis.
Cleerly ISCHEMIA provides coronary plaque characterization, detailing volume, type, and location, along with stenosis severity assessment. HeartFlow Analysis offers plaque analysis, which includes quantification and characterization of plaque.
Yes, both tools generate 3D models of coronary arteries. Cleerly ISCHEMIA creates 3D digital models, while HeartFlow Analysis develops personalized 3D models of patients' coronary arteries from standard CT scans.
Cleerly ISCHEMIA offers vessel-level ischemia likelihood determination and integration with PowerScribe via API, providing comprehensive interactive web-based reports. HeartFlow Analysis utilizes Computational Fluid Dynamics (CFD) for blood flow simulation and includes Roadmapu2122 Analysis for CCTA reading, aiming for high diagnostic accuracy.

Backers

Who funded each tool's parent company.

AI Tool Finder
AI-powered search. Results may not be comprehensive.