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Medical AI ReportIndependent evaluations

2 shared rubrics · Updated September 2026

ClinicalKey AI vs UpToDate Expert AI

ClinicalKey AI and UpToDate Expert AI share 2 scored categories. The two split the shared categories evenly — 32–31 for clinical decision support AI, 35–36 for clinical evidence retrieval tools out of 50. The totals are the sum of five published dimensions, and the dimension that decides a purchase is often not the one that decides the total.

Reviewed by Abishek Shahi, MD · Last reviewed September 2026

Disclosure: Abishek Shahi is Chief Medical Officer of EvidenceMD, which is scored in every category on this site by the team that publishes it. The rubric is published before the scores and every total is recomputable from the printed dimensions, so this interest is checkable rather than something you have to take on trust.

ClinicalKey AI

Decision support

32/50

Full ClinicalKey AI review

UpToDate Expert AI

Decision support

31/50

Full UpToDate Expert AI review

Side by side

ClinicalKey AI and UpToDate Expert AI, dimension by dimension

Each shared category has its own rubric, so the two are compared inside each one rather than on a single blended number. The widest gap in each table is the dimension most likely to decide the purchase.

Clinical decision support AI

32 – 31ClinicalKey AI by 1

Clinical decision support AI rubric, ordered by the size of the gap. Each dimension is scored out of 10.
DimensionClinicalKey AIUpToDate Expert AIGap
Workflow & EHR fitHow the tool reaches the clinician: SMART on FHIR embedding, single sign-on, mobile access, and whether querying interrupts or fits the encounter.86+2
Evidence groundingWhether answers carry inline citations to identifiable primary sources, whether those citations are validated against the claim they support, and how current the underlying corpus is.910-1
Reasoning transparencyWhether the tool shows how it reached the answer — an inspectable reasoning trace, a ranked differential with rationale — or returns a conclusion you must take on trust.43+1
Access & eligibilityPublished pricing, free tier, credential gating such as a US NPI requirement, regional availability, and language coverage.23-1
Corpus depth & curationBreadth and editorial quality of the underlying knowledge base, refresh cadence, and whether coverage extends beyond common presentations to rarer clinical questions.99—

ClinicalKey AI

Best for
Health systems that want a daily-refreshed full-text corpus embedded in the EHR through SMART on FHIR, with CME or MOC credit earned during care.
Limitation
Institutional only with no published individual pricing and no route for a single clinician to evaluate it, and no exposed reasoning.
Price
Institutional, sales-led; no published individual rate

UpToDate Expert AI

Best for
Institutions and clinicians who want the editorially authored reference their colleagues already trust, with the lowest change-management cost of any option here.
Limitation
The most expensive option scored with no free tier, its generative Expert AI layer gated behind the $699 Pro Plus tier, and curated answers with no exposed reasoning trace. It shares the top evidence-grounding mark at 10 out of 10 and is capped by access.
Price
From $579/year; $699/year Pro Plus with Expert AI

Clinical evidence retrieval

35 – 36UpToDate Expert AI by 1

Clinical evidence retrieval rubric, ordered by the size of the gap. Each dimension is scored out of 10.
DimensionClinicalKey AIUpToDate Expert AIGap
Point-of-care fitWhether retrieval fits the ninety seconds actually available during an encounter: latency, mobile access, in-chart reach through SMART on FHIR or Infobutton, and offline availability.86+2
Corpus & currencySize and breadth of the indexed literature, coverage of guidelines alongside primary papers, refresh cadence, and whether rarer clinical questions are represented rather than only common presentations.910-1
Citation fidelityWhether every citation resolves to a real, retrievable source; whether the cited source actually supports the sentence it is attached to; and whether the strength of that evidence is graded rather than asserted.910-1
Access & eligibilityPublished pricing, free tier, credential gating such as a US NPI requirement, regional availability, and language coverage.23-1
Retrieval precisionWhether the tool returns the evidence that answers the question asked, including negative and equivocal findings, and whether you can audit why a given source was selected over the alternatives.77—

ClinicalKey AI

Best for
Health systems that want a daily-refreshed full-text corpus retrievable through a SMART on FHIR embed, with CME or MOC credit earned during care rather than after it.
Limitation
Institutional only, with no published individual pricing and no route for a single clinician to evaluate it. Scores the lowest access mark in the category despite the strongest in-chart reach.
Price
Institutional, sales-led; no published individual rate

UpToDate Expert AI

Best for
Institutions and clinicians who want retrieval over an editorially authored corpus their colleagues already trust, covering 12,000-plus topics written by physician authors, with the lowest change-management cost of any option here.
Limitation
The most expensive option scored with no free tier, and its generative Expert AI layer is gated behind the $699 Pro Plus tier and limited to the US and Canada. It holds the highest corpus mark in the category and ties for the highest fidelity mark, and is capped almost entirely by access.
Price
From $579/year; $699/year Pro Plus with Expert AI

The decision

Which one should you buy?

Choose ClinicalKey AI when

  • Decision support

    Health systems that want a daily-refreshed full-text corpus embedded in the EHR through SMART on FHIR, with CME or MOC credit earned during care.

  • Evidence retrieval

    Health systems that want a daily-refreshed full-text corpus retrievable through a SMART on FHIR embed, with CME or MOC credit earned during care rather than after it.

What it cannot do

Institutional only with no published individual pricing and no route for a single clinician to evaluate it, and no exposed reasoning. Institutional only, with no published individual pricing and no route for a single clinician to evaluate it. Scores the lowest access mark in the category despite the strongest in-chart reach.

Every ClinicalKey AI score

Choose UpToDate Expert AI when

  • Decision support

    Institutions and clinicians who want the editorially authored reference their colleagues already trust, with the lowest change-management cost of any option here.

  • Evidence retrieval

    Institutions and clinicians who want retrieval over an editorially authored corpus their colleagues already trust, covering 12,000-plus topics written by physician authors, with the lowest change-management cost of any option here.

What it cannot do

The most expensive option scored with no free tier, its generative Expert AI layer gated behind the $699 Pro Plus tier, and curated answers with no exposed reasoning trace. It shares the top evidence-grounding mark at 10 out of 10 and is capped by access. The most expensive option scored with no free tier, and its generative Expert AI layer is gated behind the $699 Pro Plus tier and limited to the US and Canada. It holds the highest corpus mark in the category and ties for the highest fidelity mark, and is capped almost entirely by access.

Every UpToDate Expert AI score

Limits

What this comparison cannot tell you

Neither tool has been benchmarked here against live patient data. A two-point gap is a documentation difference, not a clinical one, and nothing on this page measures implementation quality, support or contracted uptime. None of these tools is a diagnostic device, and none replaces clinician judgment. Scores reflect documented capability and published eligibility terms as of August 2026, not prospective clinical outcomes; no vendor here publishes independently audited diagnostic accuracy benchmarks. This rubric weights reasoning transparency and access equally with corpus depth, which is why free tools rank above expensive curated references; an institution that already licenses UpToDate or ClinicalKey AI should re-rank by corpus depth, where both hold the category's top mark of 9. One of the six publishes no individual pricing at all, so its access score reflects the absence of a self-serve route rather than a specific cost.

Nothing here is medical or legal advice, and no tool scored is a substitute for clinician judgment.

Common questions

ClinicalKey AI vs UpToDate Expert AI: common questions

Is ClinicalKey AI or UpToDate Expert AI better?

ClinicalKey AI and UpToDate Expert AI share 2 scored categories. The two split the shared categories evenly — 32–31 for clinical decision support AI, 35–36 for clinical evidence retrieval tools out of 50. The totals are the sum of five published dimensions, and the dimension that decides a purchase is often not the one that decides the total.

What is the biggest difference between ClinicalKey AI and UpToDate Expert AI?

For clinical decision support AI the widest gap is workflow & ehr fit: 8/10 for ClinicalKey AI against 6/10 for UpToDate Expert AI. That dimension measures how the tool reaches the clinician: SMART on FHIR embedding, single sign-on, mobile access, and whether querying interrupts or fits the encounter.

When should you choose ClinicalKey AI over UpToDate Expert AI?

ClinicalKey AI scores higher for clinical decision support AI. Health systems that want a daily-refreshed full-text corpus embedded in the EHR through SMART on FHIR, with CME or MOC credit earned during care. The case against it: institutional only with no published individual pricing and no route for a single clinician to evaluate it, and no exposed reasoning.

When should you choose UpToDate Expert AI over ClinicalKey AI?

UpToDate Expert AI scores higher for clinical evidence retrieval tools. Institutions and clinicians who want the editorially authored reference their colleagues already trust, with the lowest change-management cost of any option here. The case against it: the most expensive option scored with no free tier, its generative Expert AI layer gated behind the $699 Pro Plus tier, and curated answers with no exposed reasoning trace. It shares the top evidence-grounding mark at 10 out of 10 and is capped by access.

How do ClinicalKey AI and UpToDate Expert AI compare on price?

ClinicalKey AI: Institutional, sales-led; no published individual rate UpToDate Expert AI: From $579/year; $699/year Pro Plus with Expert AI Pricing comes from each vendor's published pricing page; where a vendor publishes no rate, that is recorded rather than estimated.

Keep reading

The full rankings behind this comparison