EY vs Gartner: full comparison for 2026
Quick verdict
EY (4.2/5) edges ahead of Gartner (4.2/5) overall. EY is the better choice for enterprises building AI risk into existing controls. Gartner is the stronger option for CIOs and CDOs choosing AI vendors. The right choice depends on how independent you need the advice to be, your regulatory exposure, and your budget.
EY vs Gartner: head-to-head summary
| Criterion | EY | Gartner |
|---|---|---|
| Founded | 1989 | 1979 |
| HQ | London, UK | Stamford, USA |
| Team size | ~400,000 | ~21,000 |
| Rating | 4.2 / 5 | 4.2 / 5 |
| Primary differentiator | AI risk work folded into existing technology risk and controls programs | Analyst advice on AI vendors and governance with no implementation work to sell |
| Pricing model | Engagement fees per scope; rates not published | Annual research and advisory subscriptions; rates not published |
| Min. engagement | Not disclosed | Not disclosed |
| Primary tech stack | EU AI Act, NIST AI RMF, GDPR | NIST AI RMF, EU AI Act |
| Industries served | Financial services, Insurance, Public sector, Energy, Consumer | Financial services, Public sector, Healthcare, Manufacturing, Retail |
EY vs Gartner: overview
EY
EY was formed by the 1989 merger of Ernst & Whinney and Arthur Young and employs about 400,000 people. Its advisory teams cover responsible AI, AI risk, and compliance programs, and its technology risk leaders have spoken publicly about how far real AI assurance still has to go. That candor is useful for buyers who want an honest view of what can be certified today. Like the rest of the Big Four, it sells implementation as well.
Gartner
Gartner was founded in 1979, is based in Stamford, Connecticut, and has around 21,000 employees. It sells research subscriptions and analyst access, and it doesn't implement anything, so its advice on AI vendors, build-or-buy choices, and governance carries no delivery sale. There is a catch. Technology vendors are also Gartner clients, and the advice is general research applied to your case more than a bespoke plan. CDOs and CIOs use it most for vendor selection and benchmarking.
Services and capabilities: EY vs Gartner
| Capability | EY | Gartner |
|---|---|---|
| Readiness assessment | ✓ | ✗ |
| Use-case prioritization | ✗ | ✗ |
| TCO / ROI modeling | ✗ | ✗ |
| AI governance & EU AI Act | ✓ | ✓ |
| Build vs. buy advice | ✗ | ✓ |
| Independent audit or assurance | ✓ | ✗ |
| Roadmap any vendor can implement | ✗ | ✓ |
| Delivery capability after advice | ✓ | ✗ |
Frameworks and platforms: EY vs Gartner
| Framework / platform | EY | Gartner |
|---|---|---|
| EU AI Act | ✓ | ✓ |
| GDPR | ✓ | N/A |
| DORA | N/A | N/A |
| NIST AI RMF | ✓ | ✓ |
| ISO/IEC 42001 | N/A | N/A |
| Azure | ✓ | N/A |
| AWS | N/A | N/A |
| Google Cloud | N/A | N/A |
Pricing comparison: EY vs Gartner
| Criterion | EY | Gartner |
|---|---|---|
| Minimum engagement | Not disclosed | Not disclosed |
| Engagement models | Fixed-scope assessment, Multi-use-case advisory, Audit or certification, Delivery team | Ongoing advisory |
| Rate transparency | Not public | Not public |
| Price tier | Mid-market | Mid-market |
Target audience comparison: EY vs Gartner
| Dimension | EY | Gartner |
|---|---|---|
| Best company size | Enterprise | Enterprise |
| Best industries | Financial services, Insurance, Public sector | Financial services, Public sector, Healthcare |
| Best use cases | Adding AI risk to an existing controls framework., Responsible AI policies for a large insurer. | Shortlisting AI vendors before a purchase., Benchmarking AI spending against peers. |
| Typical project type | Fixed-scope assessment | Ongoing advisory |
EY vs Gartner: pros and cons
| EY | |
|---|---|
| + | Ties AI risk to controls frameworks finance teams already use |
| + | Realistic public view on the limits of AI assurance |
| + | Large global bench |
| - | Premium fees |
| - | Sells delivery alongside advice |
| - | Audit-client independence rules apply |
| Gartner | |
|---|---|
| + | Doesn't sell implementation, so no build contract follows the advice |
| + | Broad view of AI vendors and their pricing |
| + | Benchmarks against many peer organizations |
| - | Technology vendors are also its clients |
| - | Advice is research-based, without hands-on data work in your systems |
| - | Subscription pricing is a fixed annual commitment |
Who should choose EY?
A typical fit: adding AI risk to an existing controls framework.
AI risk work folded into existing technology risk and controls programs. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Insurance, Public sector, Energy, Consumer.
Who should choose Gartner?
A typical fit: shortlisting AI vendors before a purchase.
Analyst advice on AI vendors and governance with no implementation work to sell. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Public sector, Healthcare, Manufacturing, Retail.
Decision matrix: EY vs Gartner
| Your situation | Recommended choice |
|---|---|
| You want advice with no build contract attached | Gartner |
| Finance needs run costs before approving anything | Neither lists cost modeling; ask for a sample |
| Some of your use cases may be high-risk under the EU AI Act | Both cover AI Act classification |
| You need an outside check on a system already built | EY |
| You want the same firm to build what it recommends | EY |
| Your budget is at the lower end | Compare: EY (Not disclosed) vs Gartner (Not disclosed) |
| You need advisers in many countries at once | EY |
Use case fit: EY vs Gartner
| Use case | EY fit | Gartner fit | Winner |
|---|---|---|---|
| Adding AI risk to an existing controls framework. | Strong | Limited | EY |
| Responsible AI policies for a large insurer. | Strong | Limited | EY |
| Shortlisting AI vendors before a purchase. | Limited | Strong | Gartner |
| Benchmarking AI spending against peers. | Limited | Strong | Gartner |
Verdict: EY vs Gartner
EY (4.2/5) is the stronger overall choice for most AI Advisory projects. AI risk work folded into existing technology risk and controls programs.
Gartner (4.2/5) is worth a look if you need benchmarking AI spending against peers. If your situation matches that, Gartner is a competitive option.
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EY vs Gartner FAQ
Is EY better than Gartner?
EY (4.2/5) scores higher overall, but "better" depends on your use case. EY's strongest advantage: ties AI risk to controls frameworks finance teams already use. Gartner's strongest advantage: Doesn't sell implementation, so no build contract follows the advice.
How do EY and Gartner differ in pricing?
EY's pricing: engagement fees per scope; rates not published. Gartner's pricing: annual research and advisory subscriptions; rates not published. Any hourly bands shown come from Clutch, not a published rate card, so a scoping call is still needed for a project quote.
Which is better for enterprise: EY or Gartner?
EY is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each firm before shortlisting.
What are the main differences between EY and Gartner?
EY's primary differentiator is: AI risk work folded into existing technology risk and controls programs. Gartner's primary differentiator is: analyst advice on AI vendors and governance with no implementation work to sell. They also differ in team size (~400,000 vs ~21,000), minimum engagement (Not disclosed vs Not disclosed), and primary industries served (Financial services, Insurance vs Financial services, Public sector).
Verify all details directly with each firm before making a decision.