Avo vs Zio
Avo's press release lists DynaMed (EBSCO Clinical Decisions), MCG and KDIGO as partners, and its buyer is a health system's informatics office rolling out guideline pathways. iRhythm sells a monitoring service. A wear-and-send Zio patch feeds a deep-learning arrhythmia analysis, cardiac technicians validate the findings, and a physician report follows. The company is public with 18 FDA 510(k) clearances, the latest the ZEUS Platform in May 2026, and the vendor lists CE, UKCA and PMDA marks. It bills through Medicare-enrolled IDTFs and publishes no price. The record includes an FDA warning letter of May 25, 2023 over Zio AT changes, with a Form 483 after July 2024 inspections, and the 10-K says FDA issues remain open and a further warning letter, consent decree or recall is possible.
A cardiology group that wants ambulatory ECG monitoring cannot get it from Avo, and an informatics office that wants pathways in the chart cannot get them from a patch.
Decision support · Reviewed November 2, 2026

Avo
by AvoMD
Guideline-based clinical decision support and EHR chart assistants for health systems, with ambient documentation.
Zio
by iRhythm Technologies · founded 2006
Zio ECG patch service: a deep-learning algorithm flags arrhythmias, cardiac technicians validate them, and a physician report follows.
When to pick each one
Avo
- DynaMed, MCG and KDIGO named as partners
- Evidence-grounded pathways for health systems
Zio
- 18 FDA 510(k) clearances, public company
- Patch, deep-learning analysis and technician review
Score
Each row shows points earned of points available under the published rubric.
Avo
18of 100
Zio
69of 100
| Dimension | Avo | Zio | Difference |
|---|---|---|---|
| FDA clearance | 0 / 12 | 12 / 12 | -12 |
| HIPAA / SOC2 / BAA | 6 / 10 | 0 / 10 | +6 |
| EHR integrations (count) | 1.7 / 5.6 | 0 / 5.6 | +1.7 |
| Top-3 EHR coverage (Epic / Oracle / Athena) | 3.4 / 4.8 | 0 / 4.8 | +3.4 |
| Bidirectional write-back | 0 / 1.2 | 0 / 1.2 | 0 |
| Peer-reviewed papers | 0 / 21 | 21 / 21 | -21 |
| RCT / meta-analysis / systematic review | 0 / 9 | 9 / 9 | -9 |
| Funding & adoption signal | 3 / 12 | 8.4 / 12 | -5.4 |
| Pricing transparency | 1.3 / 2.5 | 1.3 / 2.5 | 0 |
| Years in market | 0 / 6 | 6 / 6 | -6 |
Scroll horizontally to see every column.
Pricing
Avo
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Enterprise | n/a | n/a | No public price. The pricing page returns 404; the site offers a demo booking only. |
Zio
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Enterprise | n/a | n/a | No public price. |
Evidence
Avo
FDA decisions
No FDA decision cited in our research as of November 2, 2026.
Zio
FDA decisions
K252859 (opens in new tab)510(k)2026-05-29
ZEUS Platform (FG0501US, DQK)
K243650 (opens in new tab)510(k)2025-08-15
Zio monitor (DFG0001)
K240177 (opens in new tab)510(k)2024-10-30
Zio AT device (A100A1001, DSI)
K240029 (opens in new tab)510(k)2024-10-21
Zio AT device (A100A1001, QYX)
K222389 (opens in new tab)510(k)2023-02-15
ZEUS System
Show 13 more
K213409 (opens in new tab)510(k)2022-07-19
ZEUS System (Zio Watch)
K202359 (opens in new tab)510(k)2021-05-21
Zio Monitor
K202527 (opens in new tab)510(k)2021-05-21
ZEUS System
K190593 (opens in new tab)510(k)2019-08-23
Zio XT ECG Monitoring System, Zio AT
K181502 (opens in new tab)510(k)2018-08-29
Zio AT ECG Monitoring System, ZEUS System
K163512 (opens in new tab)510(k)2017-06-02
Zio AT ECG Monitoring System
K143513 (opens in new tab)510(k)2015-06-19
ZIO SR ECG Monitoring Service
K142681 (opens in new tab)510(k)2014-11-21
ZEUS System
K121319 (opens in new tab)510(k)2012-07-18
ZIO PATCH
K113862 (opens in new tab)510(k)2012-02-06
ZIO PATCH
K091075 (opens in new tab)510(k)2009-07-21
ZEUS (ZIO ECG UTILIZATION SERVICE) SYSTEM
K090363 (opens in new tab)510(k)2009-05-08
ZIO PATCH Z100
K081471 (opens in new tab)510(k)2008-06-24
ECARD AND CCARD
Peer-reviewed
5 PubMed records name Zio.
- Physical activity cut-points for older adults using the Zio XT onboard accelerometer. (opens in new tab)
- Validation of a Zio XT Patch Accelerometer for the Objective Assessment of Physical Activity in the Atherosclerosis Risk in Communities (ARIC) Study. (opens in new tab)
- Zio® XT Patches in Pediatrics During the COVID-19 Pandemic: Comparisons Between In-Person and Mail-Home Application. (opens in new tab)
Compliance and integrations
Documented from each vendor’s own pages.
| Spec | Avo | Zio |
|---|---|---|
| Free tier | ||
| HIPAA | ||
| SOC 2 Type II | ||
| EHR integrations | Epic, athenahealth, MEDITECH | Not specified |
| Founded | n/a | 2006 |
| HQ | US | US |
Scroll horizontally to see both columns.
Common questions
Open the full decision support comparison
Differential diagnosis, treatment guidance, drug interactions, evidence-grounded Q&A. The CDS landscape ranges from the UpToDate gold standard to physician-only OpenEvidence. We compared what clinicians actually use.
