Compare · Aidoc and Viz.ai

Aidoc vs Viz.ai vs RapidAI and how the three acute triage AI platforms compare

The short answer

Aidoc, Viz.ai and RapidAI all flag time-critical findings on CT and push an alert to a care team, but each was built around a different problem. Aidoc is the broadest: its January 2026 FDA clearance brings 14 body CT indications into one triage workflow. Viz.ai is a care coordination network built around the stroke pathway, and Viz LVO holds the first New Technology Add-on Payment CMS ever granted to AI software. RapidAI is the deepest in stroke imaging itself, spanning non-contrast CT, perfusion and vessel analysis. None of the three drafts your routine reports.

Most US groups shortlisting acute triage AI end up with these three names, and the comparison is harder than it looks because the products are not really competing on the same axis. Aidoc sells breadth: one platform, many cleared indications, run as a workflow layer across the health system. Viz.ai sells speed of coordination: the alert goes to the interventional team in parallel with the radiologist, so the clock starts earlier. RapidAI sells depth in one pathway: the imaging analysis that stroke decisions actually turn on.

The table below compares all three on published vendor material only, including the parts where each one wins. It is worth being clear about what is not in it. All three are triage and notification tools aimed at the urgent slice of the worklist. Radiological.ai sits in a different place, flagging suspected findings, prioritizing the worklist and drafting the structured report across X-ray, CT and MRI through the whole shift. It is decision support, and the radiologist reviews, edits and signs every study.

The Reading Station

Assistant ready

Worklist

Not for diagnostic use

Structured report

Draft

Run the assistant to draft this report for review.

You review & sign

Decision support. The radiologist reviews and signs every study.

Drafted in · you review & sign Worklist re-prioritized

Decision support for qualified clinicians. Radiological.ai does not provide a diagnosis and is not a substitute for professional judgment.

See the comparison

Flag · prioritize · draft · you review and sign

Aidoc is the broadest triage platform, Viz.ai owns the coordinated stroke pathway and the only AI add-on payment, RapidAI is deepest in stroke imaging; all three stop at triage, while Radiological.ai carries the whole read through to a drafted report.

Side by side

Aidoc vs Viz.ai vs RapidAI, side by side

Compiled only from each company's own published announcements and product material. No column is the sales column, and each vendor leads on different rows.

What you are comparing	Aidoc	Viz.ai	RapidAI
What it was built around	Broad multi-pathology triage across body CT	The acute stroke pathway and the team coordination around it	Stroke imaging analysis, starting from perfusion
Platform name	aiOS, running the CARE foundation model, which the company expands as Clinical AI Reasoning Engine	Viz.ai One	Rapid Edge Cloud, with Rapid Navigator Pro and mobile and web apps
Landmark FDA clearance	January 26, 2026, a comprehensive body CT triage solution the company describes as the first built on a healthcare foundation model	February 2018 De Novo for Viz LVO, the first computer-aided triage and notification software the FDA cleared	April 18, 2023 for Rapid NCCT Stroke, which the company describes as the first and only cleared device to flag suspected ICH and LVO from non-contrast CT
Breadth of cleared indications	11 newly cleared indications combined with 3 previously cleared into a single workflow, 14 in total	Centered on stroke, extended into further vascular pathways	Five more modules cleared November 25, 2025: DeltaFuse, LMVO, MLS, OH and Aortic
Performance the vendor publishes	Pivotal study mean 97% sensitivity and 98% specificity, reported up to 98.5% and 99.7%	Reduced time to treatment, the basis of the CMS submission	Describes its CT and MR perfusion as the only such analysis clinically validated in randomized trials
Non-contrast CT entry point	Part of the body CT indication set	Not the entry point; LVO detection runs on CT angiography	Rapid NCCT Stroke is built for exactly this, before any contrast study
Medicare add-on payment	No AI-specific add-on payment published	Viz LVO received the first New Technology Add-on Payment CMS granted to any AI software, up to $1,040 per eligible patient, later renewed	No AI-specific add-on payment published
Deployment model	A centralized operating layer for running and scaling multiple cleared solutions	Cloud platform built around mobile alerting	Cloud-first with on-premise capability
How the alert reaches people	Through the aiOS workflow layer into existing clinical systems	Mobile-first alerts to the specialist team in parallel with the radiologist	PACS, email and mobile app
Scale the vendor claims	More than 100 million patient cases analyzed	No comparable figure in the material reviewed	Nearly 10 million scans across more than 2,000 hospitals
Report drafting	Breakthrough Device Designation granted June 2026 for First Read, which drafts preliminary chest radiograph report text. A designation is not a clearance and not yet a shipping product	Not a reporting product	Not a reporting product
Where it stops	Triage and notification; routine reads and report drafting sit outside it today	Triage and coordination; the report is still written elsewhere	Stroke imaging analysis; the rest of the worklist is untouched
Best suited for	Health systems standardizing many cleared AI tools on one platform	Hospitals whose bottleneck is getting the right specialist moving fast	Comprehensive stroke centers that want the deepest imaging analysis

Compiled from the Aidoc FDA clearance announcement of January 26, 2026 and the June 2026 Breakthrough Device Designation, the Viz.ai De Novo and CMS New Technology Add-on Payment announcements, and the RapidAI clearance announcements of April 18, 2023 and November 25, 2025. Clearance lists change quickly, so confirm current indications and contract terms with each vendor before building a shortlist around this table.

Side by side

Radiological.ai vs Aidoc and Viz.ai, honestly

A fair look at what each does well. Both are capable tools. Here is where they differ.

What matters	Radiological.ai	Aidoc and Viz.ai
Scope of the worklist covered	The whole shift, routine and urgent studies alike	All three focus on the acute, time-critical slice
Structured report drafting	Drafts the structured report in your template for you to edit and sign	Not a reporting product; Aidoc has a designation, not a cleared product
Finding flags for review	Flags suspected findings as a second set of eyes you confirm	Strongest on specific cleared acute indications
Modality coverage	X-ray, CT and MRI across common study types in one pane	Strongest in acute CT pathways
Regulatory status	Decision support; we make no regulatory-status claims on this site	Each publishes its own FDA clearances, listed in the table above
Best suited for	Groups wanting one assistant for flagging, triage and drafting	Teams whose priority is acute-care triage above all

Comparison reflects general, publicly understood positioning. Capabilities change, so check each product for the latest.

Each vendor also has a dedicated page here comparing it directly with Radiological.ai: the Aidoc alternative page, the Viz.ai alternative page and the RapidAI alternative page, which carries a feature by feature RapidAI and Viz.ai perfusion comparison drawn from the AJNR study. If the third name has already dropped off your shortlist, Aidoc vs RapidAI takes the remaining two head to head on clearance coverage and published evidence.

If your shortlist is really about one pathway rather than a platform, the workflow underneath is on our AI stroke triage and pulmonary embolism detection pages, and the queue mechanics that decide what a radiologist actually sees first are on radiology worklist prioritization software. To see every vendor comparison grouped by what you would be replacing, start at the radiology AI alternatives hub.

Why groups pick Radiological.ai

One assistant across the whole read

These three answer a different question than we do

Aidoc, Viz.ai and RapidAI are strong at what they were built for, and if your only problem is acute triage one of them is probably the right buy. The question worth asking first is what happens to the other ninety percent of the worklist once the urgent cases are handled.

Flag, prioritize and draft in one place

Instead of stitching a triage vendor to a separate drafting tool, your team gets finding flags, worklist prioritization and a structured report draft from one assistant, across X-ray, CT and MRI, for routine studies as well as urgent ones.

Decision support, you always sign

Every flag is a suggestion and every report is a draft. The responsible radiologist reviews, edits and signs each study, which keeps clinical judgment exactly where it belongs.

Good questions

Aidoc and Viz.ai vs Radiological.ai, answered

Aidoc is a broad triage platform: its January 2026 clearance covers 14 body CT indications running through one workflow layer. Viz.ai is narrower and built around coordination, alerting the specialist team on mobile in parallel with the radiologist so treatment starts sooner. Aidoc optimizes how many conditions you catch; Viz.ai optimizes how fast the right person moves.

Neither is better in general, and the honest answer depends on your bottleneck. If cases sit unread across many pathologies, Aidoc covers more ground with more cleared indications. If your stroke cases are found quickly but the interventional team mobilizes slowly, Viz.ai targets exactly that delay and is the only one of the three with a Medicare add-on payment attached.

No free, independent score separates them. KLAS covers imaging AI only in paid reports. Viz.ai cites a 2025 Black Book survey ranking it first in 11 of 18 measures, strongest on speed to alert and mobile team coordination. For care coordination across stroke and neurovascular teams, Viz.ai is built for it; for radiologist worklist triage across many CT findings, Aidoc. Ask each for three hospital references your size.

RapidAI goes deeper in the stroke pathway specifically. It clears non-contrast CT triage, perfusion and vessel analysis, and describes its CT and MR perfusion as validated in randomized trials. Aidoc covers stroke as one indication among many. A comprehensive stroke center usually wants RapidAI depth; a health system standardizing broadly usually wants Aidoc breadth.

In one specific case, yes. CMS granted Viz LVO the first New Technology Add-on Payment ever awarded to AI software, reimbursing up to $1,040 per eligible patient, and later renewed it. That is a targeted payment tied to that product and eligibility rules, not general coverage for radiology AI, and no equivalent add-on payment is published for Aidoc or RapidAI.

Yes, and many US health systems do, which is part of why platform layers exist. The practical costs are integration work, a separate contract and security review per vendor, and more places for an alert to appear. Before adding a second vendor, check whether the overlap in cleared indications is worth the extra surface area.

Not today. All three are triage and notification products, so the report is still written in your reporting platform. Aidoc received a Breakthrough Device Designation in June 2026 for First Read, which drafts preliminary chest radiograph text, but a designation is not a clearance and it is not a shipping product yet.

More comparisons

See how Radiological.ai compares

vs Aidoc

Aidoc alternative

One assistant across the whole read, not acute triage alone.

vs Rad AI

Rad AI alternative

Drafting plus flagging and triage, in one assistant.

vs DeepHealth

DeepHealth alternative

Reporting AI without buying it from a competitor.

vs Fluency for Imaging

PowerScribe vs Fluency for Imaging

The two reporting platforms most US groups actually shortlist.

vs Annalise.ai

Annalise.ai alternative

Finding flags plus triage and drafting, together.

vs Nuance PowerScribe

Nuance PowerScribe alternative

More than dictation: flagging, triage and drafting.

vs Qure.ai

Qure.ai alternative

Flags plus triage and drafting, in one assistant.

vs Viz.ai

Viz.ai alternative

Beyond acute stroke triage, across the whole read.

vs Nuance DAX

Nuance DAX alternative

Built for the read, not for the patient conversation.

vs Lunit

Lunit alternative

One assistant across the whole read, not detection on two modalities.

vs Gleamer

Gleamer alternative

One assistant across X-ray, CT and MRI, not a suite of per-exam detectors.

vs PowerScribe One

PowerScribe One vs 360

What actually changes in the cloud move, and the third option.

vs Sirona Medical

Sirona Medical alternative

Add the assistant to the PACS you already run, without replacing the stack.

vs New Lantern

New Lantern alternative

AI drafting and triage on the PACS you keep, not a new platform.

vs RapidAI

RapidAI alternative

Past the stroke pathway, across the whole reading list.

vs Dragon Medical One

Dragon Medical One pricing

Microsoft publishes no price. Here are 25 real federal contracts that do.

vs PowerScribe

PowerScribe pricing

No list price exists. Here are the only verifiable numbers that do.

vs PowerScribe

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What AutoText actually is, how to get yours out, and what survives a migration.

vs RADPAIR and PowerScribe

RadPair vs PowerScribe

Three ways to write the report, compared on what each one actually replaces.

vs vRad (Virtual Radiologic)

vRad alternative

vRad publishes no rate card. 357 federal contract awards do.

vs ONRAD

ONRAD alternative

ONRAD publishes no rate card. 80 federal contract awards do.

vs Real Radiology

Real Radiology alternative

Real Radiology publishes no rate card. 41 Army and VA contract awards do.

vs Experity Teleradiology

Experity Teleradiology alternative

The urgent care reading service that started as one Scottsdale radiologist and now sits inside an EMR company.

vs Sectra PACS

Sectra PACS alternative

The PACS that keeps winning satisfaction surveys, sold as a cloud subscription with no public price.

vs Visage PACS

Visage PACS alternative

The fastest-growing enterprise viewer in US radiology, priced per transaction and disclosed deal by deal.

vs Intelerad PACS

Intelerad PACS alternative

The teleradiology favorite, now a GE HealthCare business, with a renewal conversation that just changed.

vs Exa PACS

Exa PACS alternative

Often sold alongside a Konica X-ray room, with a thin public record you should fill in before you sign.

vs GE Centricity PACS

GE Centricity PACS alternative

An aging install base, three GE PACS lines under one owner, and a recall record you should read before the renewal.

vs Agfa PACS

Agfa PACS alternative

A Best in KLAS platform, a federal record over $300 million, and an IMPAX install base being moved to the cloud.

vs McKesson PACS

McKesson PACS alternative

A Horizon Medical Imaging install base now owned by Optum, a $98 million federal record and a cloud PACS sold per study.

vs Mach7

Mach7 alternative

A Vermont-run, ASX-listed enterprise imaging vendor with a new CEO, falling revenue and a seat on the VA teleradiology PACS.

vs iCAD

iCAD ProFound AI alternative

The first FDA-cleared AI for breast tomosynthesis, now owned by RadNet, the largest operator of US outpatient imaging centers.

vs ScreenPoint Transpara

Transpara alternative

Dutch mammography AI sold in the US through Siemens Healthineers and Fujifilm units, with the strongest trial record in the category.

vs Cortechs.ai NeuroQuant

NeuroQuant alternative

The longest-cleared brain volumetrics product in the US, bought by imaging centers, neurology groups, the VA and military hospitals.

vs Avicenna.AI CINA

Avicenna AI alternative

CT triage for stroke, pulmonary embolism and spine fractures, usually bought inside a scanner or platform vendor's bundle.

vs VIDIStar

VIDIStar alternative

A Greenville cardiology PACS bought by Hitachi in 2018, inherited by Fujifilm in 2021 and sold today as Synapse Select.

vs Subtle Medical

Subtle Medical alternative

Two vendor-neutral MRI acceleration products, four scanner makers with their own, and the FDA and federal purchase records behind each.

See every radiology use case

From the blog: what the PowerScribe 360 end of life means for radiology groups, how much radiology AI costs, and the full comparison of the best AI radiology software in 2026.

See how Radiological.ai reads alongside your group

One assistant that flags suspected findings, prioritizes the worklist, and drafts the structured report on X-ray, CT and MRI. You review and sign every study.

See pricing

Decision support for qualified clinicians. Radiological.ai does not provide a diagnosis and is not a substitute for professional medical judgment.