Evvy vs Daye: Comparing At-Home Vaginal Microbiome Tests

Both Evvy's Vaginal Microbiome Test and Daye's Vaginal Microbiome Screen are on a mission to close the gender health gap, and both let you test your vaginal microbiome from home. But that's pretty much where the similarities end. 

Evvy uses advanced metagenomic sequencing, includes a physician review, and can take you from results to diagnosis to treatment in one place. Daye uses PCR technology and is designed as a wellness screening tool. Here's what that means in practice, and how to figure out which one is right for you.

What is Evvy?

Evvy’s approach to vaginal health testing

Evvy is built entirely around the vaginal microbiome. You start with a simple swab at home (it takes about 20 seconds), which gets analyzed using metagenomic next-generation sequencing (mNGS). Instead of checking your sample against a fixed list of known pathogens, it reads the DNA of every single microorganism present. Nothing gets filtered out before the analysis even begins.

Evvy is the only at-home vaginal microbiome test performed in a CLIA-certified, CAP-accredited laboratory, and whose assay has received New York State CLEP approval. These certifications mean Evvy's test and testing process have been independently audited for accuracy, reliability, and clinical standards, so you can trust that what's in your report reflects what's actually in your sample. The reference database behind it is built from over 150,000 vaginal microbiome samples and contains twice as many validated genomes as any public database. That's how it can accurately identify over 700 bacteria and fungi, including specific BV subtypes and fertility-linked microbes that other tests simply won't catch. It's also approved for clinical use in all 50 states.

What an Evvy Vaginal Microbiome Test reveals

Your Evvy report breaks down everything living in your vaginal microbiome, including microbes that standard testing don’t pick up. If you have BV, you'll find out which subtype you have (it matters more than you'd think). You'll also get insights into how your microbiome might be affecting your fertility or chances of IVF, plus health scores for BV, fertility, and menopause.

All Evvy results are reviewed by a licensed provider who can put together a personalized treatment plan — including prescriptions, if appropriate — without you having to book a separate appointment. A free one-on-one session with a certified health coach is part of the package too, along with access to EvvyAI, an AI tool trained on data from over 100,000 vaginal microbiome tests. And if you want to go deeper, the Expanded PCR Panel add-on screens for four STIs, ten antibiotic resistances, and eleven additional microbes, all from the same swab.

What is Daye?

Daye’s testing and wellness offerings

Daye is a femcare brand best known for its organic and CBD tampons. Their Vaginal Microbiome Test uses a proprietary diagnostic tampon to collect vaginal fluid, which absorbs it from the entire vaginal canal and cervix. Instead of a swab, you insert one of their tampons, wear it for 20 minutes, remove it, and mail it to a lab.

Daye’s test uses PCR (polymerase chain reaction) technology. PCR is excellent at detecting a specific microbe you're looking for, but it works from a fixed list of targets. Anything not on that list won't show up in your results. For vaginal health, that's a real limitation. There are thousands of species living in your microbiome, and a PCR panel can only tell you whether certain ones are present or absent if you already know what to look for.

Results, which typically arrive in 10 business days, include information about your microbiome composition and a personalized plan with lifestyle recommendations to optimize vaginal health. In the U.S., Daye’s Vaginal Microbiome Testing Kit is marketed as a general wellness test, and its website states that it “is not intended to diagnose, treat, cure, or prevent any disease” and that test results “should not be used to make medical decisions.” Coaches can offer wellness support but can't diagnose conditions or prescribe medications.

Test focus and target audience

Evvy is built for anyone navigating a real vaginal health concern, whether that’s recurring BV, yeast infections, unexplained symptoms, fertility questions, or the microbiome changes that come with perimenopause. The platform is also used by over 2,000 healthcare providers with their own patients, and has academic partnerships with Stanford, UVA, and Washington University. Because every result comes with a licensed provider review and the option to get a prescription through the platform, Evvy is designed to take you from test to diagnosis to treatment in one place.

Daye’s vaginal screen sits in a different category. In the U.S., it’s a wellness and education product. It can give you a general sense of your microbiome composition, but it can’t diagnose a condition, involve a provider, or connect you to treatment. For someone who is broadly curious about their microbiome and has no active symptoms or health concerns, that might be enough. For anyone dealing with a specific health question, it’s not designed to answer it.

Accuracy and testing method

Evvy uses mNGS, which reads the entire genetic material of every microorganism in your sample — including organisms that no one has explicitly programmed the test to look for. 

Daye uses PCR, which checks your sample against a fixed panel of pre-selected microbial targets. If something isn’t on that panel, it won’t show up in your results. For a vaginal microbiome that contains thousands of bacterial species, that’s a meaningful limitation. PCR is excellent at confirming the presence or absence of specific, known pathogens (like chlamydia or gonorrhea), but it’s not designed to provide a comprehensive view of your entire microbiome.

Evvy’s mNGS methodology has been independently validated and published in the peer-reviewed journal Diagnostics, with demonstrated sensitivity of 93% and specificity of 90%. Daye hasn’t published a comparable peer-reviewed validation of its vaginal microbiome testing methodology, so there’s no independent benchmark for assessing its accuracy.

On their website, Daye claims that using a tampon “collects more vaginal fluid than a standard swab and covers the whole vaginal canal,” suggesting this leads to more comprehensive results. It’s a reasonable-sounding claim, but Daye has not published peer-reviewed data to support it specifically in the context of its vaginal microbiome testing. They also claim it makes the collection experience less invasive, but wearing (and removing) a dry tampon is likely more uncomfortable for many people than a 20-second swab. 

Price, turnaround, and accessibility

Evvy’s Vaginal Microbiome Test is $159, or $129 per test on a subscription. That price includes physician-reviewed results, a personalized treatment protocol, and a free health coaching session. Evvy test results arrive in about a week, with the PCR add-on offering preliminary findings in 1 to 3 business days. Daye’s Vaginal Microbiome Screen is $149.90, and results arrive in 5 to 10 business days. Both tests are HSA/FSA eligible.

Which brand fits your needs?

If you're dealing with symptoms, trying to get to the bottom of a recurring infection, or want results you can actually act on, Evvy is the stronger choice. You'll get a complete picture of your vaginal microbiome (built on data from over 150,000 real samples and independently verified accuracy), plus a licensed provider who reviews your results and can prescribe treatment, and a clear path forward without having to book a separate doctor's appointment.

Daye is worth considering if you're more curious than concerned. Maybe you want a general sense of your vaginal microbiome, have no active symptoms, and prefer the familiarity of a tampon. But if you're hoping for clinical answers rather than a wellness overview, Daye's product isn't designed to provide them.

FAQs about Evvy vs Daye

Is Evvy a reliable health test?

Yes. Evvy holds CLIA, CAP, and NYS CLEP certification, which reflects the rigor of the full testing and reporting process. Its methodology has been independently published in a peer-reviewed journal, and a licensed physician reviews every report before it reaches you. With over 150,000 tests completed and more than 2,000 providers using Evvy with their patients, it’s the most thoroughly validated at-home vaginal microbiome test available.

What is the most accurate microbiome test, Evvy or Daye?

When it comes to microbiome testing, the technology determines what the test can actually find. Daye uses PCR, which checks for a short list of targets, so anything not on that list won't show up. Evvy's metagenomic sequencing reads the DNA of every microorganism in your sample, identifying 700+ bacteria and fungi without filtering anything out first. It's a more complete picture of your vaginal microbiome, and the only at-home option with peer-reviewed accuracy data to back it up.

How does Evvy compare to other screening kits like Daye?

The main differences between Evvy and Daye lie in their technology and what you can do with your results. Evvy uses a method called mNGS, which can find many more types of microbes than PCR tests. Its accuracy is backed by research, and a licensed provider checks every report and can prescribe treatment if needed. On the other hand, Daye’s product is a wellness test. It provides information about your microbiome, but cannot diagnose any vaginal infections or connect you to clinical care. If you want medical results you can act on, choose Evvy. Daye doesn’t provide that.