Honest comparison

Why not just use Viome?

Viome tests your microbiome and blood and turns the results into food and supplement advice. ProtocolEngine starts from graded evidence, with no test required.

Choose Viome if

You want direct molecular data about your gut and blood and an itemized list of foods to favor or avoid, and you are fine paying for a test first. No questionnaire can measure what a stool test does.

Choose ProtocolEngine if

You want to start without a $279 to $399 test (US prices), see the evidence grade and papers behind each recommendation, and get advice from a service that makes and sells no supplements of its own (some shop links are affiliate links).

Viome and ProtocolEngine, side by side

Measures your biology directlyViome is ahead
Viome
Yes: Yes. Stool, saliva and blood-spot tests across 400+ pathways (company figure).
ProtocolEngine
No: No. Lab results you upload add detail to your protocol.
Itemized food recommendationsViome is ahead
Viome
Yes: Yes. 370+ food recommendations per test.
ProtocolEngine
Partly: Partly. Diet items and patterns are graded and matched to your goals, not to a stool test.
Habits, diet and supplements in one plan
Viome
Yes: Yes. Food, supplements and habit guidance.
ProtocolEngine
Yes: All three are graded on the same scale and combined in one protocol.
Get a plan without buying a test first
Viome
No: No. Advice starts after a test.
ProtocolEngine
Yes: Yes. The quiz builds your protocol right away. Lab results add detail when you have them.
Evidence grade on each recommendation, linked to the papers
Viome
Not shown per recommendation on its public pages. We could not review the logged-in product. Viome cites its own research in general terms.
ProtocolEngine
Yes: Each graded supplement, habit and diet item shows its grade from S to E. Click it to see each paper and how it scored.
Earns nothing from what it recommends
Viome
No: No. It sells personalized supplements based on its own test.
ProtocolEngine
Partly: Partly. We make and sell no supplements, but some shop links are affiliate links. Links never change a grade.
Available in Germany and the EU, in German and French
Viome
Partly: Partly. Its product pages list shipping to Germany, France and other EU countries. The app is in English.
ProtocolEngine
Yes: Yes. Available in English, German and French. Account data is stored in the EU.
Price
Viome
US list prices: gut test $279, full test $399. Supplements are a separate subscription.
ProtocolEngine
Free to browse and to take the quiz. Premium: $12/mo or $99/yr

What you get	Viome	ProtocolEngine
Measures your biology directlyViome is ahead	Yes: Yes. Stool, saliva and blood-spot tests across 400+ pathways (company figure).	No: No. Lab results you upload add detail to your protocol.
Itemized food recommendationsViome is ahead	Yes: Yes. 370+ food recommendations per test.	Partly: Partly. Diet items and patterns are graded and matched to your goals, not to a stool test.
Habits, diet and supplements in one plan	Yes: Yes. Food, supplements and habit guidance.	Yes: All three are graded on the same scale and combined in one protocol.
Get a plan without buying a test first	No: No. Advice starts after a test.	Yes: Yes. The quiz builds your protocol right away. Lab results add detail when you have them.
Evidence grade on each recommendation, linked to the papers	Not shown per recommendation on its public pages. We could not review the logged-in product. Viome cites its own research in general terms.	Yes: Each graded supplement, habit and diet item shows its grade from S to E. Click it to see each paper and how it scored.
Earns nothing from what it recommends	No: No. It sells personalized supplements based on its own test.	Partly: Partly. We make and sell no supplements, but some shop links are affiliate links. Links never change a grade.
Available in Germany and the EU, in German and French	Partly: Partly. Its product pages list shipping to Germany, France and other EU countries. The app is in English.	Yes: Yes. Available in English, German and French. Account data is stored in the EU.
Price	US list prices: gut test $279, full test $399. Supplements are a separate subscription.	Free to browse and to take the quiz. Premium: $12/mo or $99/yr

Check our side yourself

47,268

papers analyzed and graded so far

456

new papers added in the last 7 days

How every grade is calculated Today's research digest Try the interaction checker

The honest difference

Viome measures something a questionnaire cannot. The question is what you do with it. ProtocolEngine shows how strong the evidence is for each option, so you can judge any recommendation, including one from a test.

Start with the quiz. If you test later, upload your lab results from any provider.

Build your protocol in 2 minutes See pricing

Facts about Viome were checked against Viome's own website on October 18, 2026. Prices and features change, so check their site before you buy.

Spotted something out of date or unfair? Tell us and we will correct it: hello@protocolengine.io

ProtocolEngine makes and sells no supplements. Some shop links elsewhere on the site are affiliate links; they never change a grade. ProtocolEngine provides general information based on published research. It is not medical advice, diagnosis or treatment. Affiliate disclosure

Viome is a name or trademark of its owner, used here only to refer to it. ProtocolEngine is not affiliated with or endorsed by Viome.

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