The short version. Jack and Fellow are both mail-in kits analyzed by CLIA-certified labs, which puts them in the same top tier on the thing that matters most: a real lab result, not a strip. The right choice comes down to what you are testing for, price, and turnaround, so match the kit to your goal.
- Both are real lab analyses, which already beats any instant strip.
- Decide by purpose: confirming a vasectomy, checking fertility, or storing sperm.
- Compare current price and turnaround on each site before you buy.
- Either way, your urologist gives the formal clearance for a vasectomy.
If you have narrowed your at-home semen analysis down to Jack and Fellow, you have already made the most important decision: both are mail-in kits read by certified labs, so you are choosing between two real analyses rather than settling for a strip. That is the right tier to be shopping in. From here, the choice is about fit, not fundamentals.
What they have in common
Start with the shared ground, because it is most of the picture:
- Real lab analysis. Both send your sample to a CLIA-certified lab that performs an actual semen analysis, rather than reacting to a cutoff like an instant strip does.
- At-home collection. Both remove the clinic-room collection and the drive, using a preservative to keep the sample readable in transit.
- Secure digital results. Both return results through a secure online portal within a few days of the lab receiving your sample.
On the axis that separates a trustworthy result from a guess, real lab versus strip, they land in the same place. The at-home sperm tests compared guide explains why that axis matters most.
How to choose between them
Since the core science is comparable, choose by what you actually need:
What are you testing for?
- Confirming a vasectomy. You want a lab-verified pass/fail that follows the AUA clearance standard. Jack offers a dedicated post-vasectomy test built for exactly this, covered in the at-home post-vasectomy semen analysis guide.
- Checking fertility. You want the full five-marker panel: count, concentration, motility, total motile count, and morphology. Jack’s RSA analysis covers this, and it is the panel described in the male fertility testing guide.
- Storing sperm. If long-term sperm freezing and storage is your goal rather than a one-time analysis, factor that into which service fits.
Price and turnaround. Pricing and result timelines change, so check the current numbers on each company’s site rather than relying on a figure that may be out of date. Compare the total cost for the specific test you need, not just a headline price.
The experience. Packaging discretion, collection instructions, and how results are presented differ between services. If one makes the process clearer for you, that is a legitimate tiebreaker.
Where Jack fits
Jack’s lineup is built around two clear jobs: a dedicated post-vasectomy test to confirm a vasectomy worked, and a routine semen analysis (RSA) for a full fertility panel. If your need is one of those two, Jack is designed for it specifically rather than as a general-purpose kit.
The honest bottom line
There is no wrong answer between two real, lab-read mail-in tests, and you should feel free to compare current pricing and pick what fits. What you should not do is drop down to an instant strip to save money on a result that actually matters, whether that is confirming a vasectomy or evaluating fertility. The strip-versus-lab gap is far bigger than any difference between two reputable lab kits. And for a vasectomy, remember that whichever kit you use, your urologist provides the formal clearance to stop other contraception.
FAQ
Are Jack and Fellow both real lab tests? Yes. Both are mail-in kits analyzed by CLIA-certified labs. For a vasectomy that means a lab-verified pass/fail (not a strip you read yourself); their fertility analyses report the full count and motility panel.
Which is better for confirming a vasectomy? Choose a kit with a dedicated, lab-analyzed post-vasectomy test that returns a verified pass/fail. Jack offers a test built specifically for that purpose.
Which is better for checking fertility? Choose the full five-marker panel. Jack’s RSA analysis covers count, concentration, motility, total motile count, and morphology.
How do their prices compare? Pricing changes over time, so compare the current cost of the specific test you need on each company’s site before buying.
Does either replace seeing a urologist? For a vasectomy, no. Both give a lab result, but your urologist provides the formal clearance to stop using other contraception.
Sources
- American Urological Association Vasectomy Guideline. Post-vasectomy semen analysis standards.
- Cleveland Clinic: Semen Analysis. What a lab analysis measures.
- Mayo Clinic: Semen Analysis. How semen analysis works.
Undeez is not a medical provider. Confirm current product details with each provider and your clearance with your urologist.
