If you sell on Teachers Pay Teachers, you've probably seen both tools recommended in the same Reddit threads, Facebook groups, and seller podcasts. They look similar from the outside — both promise to surface profitable keywords, both have a "free tier", both have annual pricing. The differences only matter once you sit down to do the actual research. This page walks through where each tool wins, where each loses, and which kind of seller should pick which.
| Feature | JustNiches | SellerSpy |
|---|---|---|
| Keyword research | ✓ | ✓ |
| Keyword generator (related ideas) | ✓ | ✓ |
| Title analyzer | ✓ | ✓ |
| Rank checker | ✓ | ✓ |
| Opportunity Score (0–100) | ✓ five-factor synthesis | — raw data only |
| Multi-page competition analysis | Up to 5 pages (~120 products) | Page 1 only (typical) |
| Google Trends integration | ✓ live curve per keyword | — not bundled |
| KW-in-title / KW-in-description % | ✓ surfaces under-optimized SERPs | — not exposed |
| CSV export | ✓ Pro + Unlimited | ✓ |
| Free plan | 10 searches/day, no card | Limited (check current site) |
| Pro annual price | $70/year (Early Adopter → $99 soon) | Typically higher per month |
| Bilingual UI (EN + TH) | ✓ | EN only |
30-second verdict
If you already use SellerSpy and your workflow is working — keep it. If you're choosing fresh, JustNiches gives you a single Opportunity Score, deeper page-2-to-5 visibility, and a bilingual interface at a lower annual price. Try the free tier on a keyword you already know is competitive and see if the score matches your gut.
Try JustNiches Free →About SellerSpy
SellerSpy is one of the longest-running TPT-focused SEO tools. The team behind it has documented experience in marketplace SEO, and the product has earned a steady base of paying users — the kind of users who recommend it by name in Facebook seller groups. Their feature set covers the standard pillars of TPT keyword research: a search-volume-style metric, a related-keyword generator, a title analyzer, and a rank checker.
Where SellerSpy is genuinely strong: brand recognition, a mature affiliate program, and a UX that veteran sellers find comfortable to navigate. Their public-facing page mostly converts on direct brand searches — meaning if you've already heard of them, you'll find a smooth onboarding. They also have a meaningful presence on guest podcasts in the niche, which is something most newer tools have not earned yet.
Where SellerSpy is weaker: their organic blog traction is modest, they don't currently surface a single synthesized opportunity score, their multi-page analysis depth is limited compared to what's possible, and they don't bundle Google Trends data. Pricing skews higher per month than JustNiches' Early Adopter plan.
About JustNiches
JustNiches is built and maintained by a working TPT seller. The whole product started because the founder spent a year guessing which products to create and watching most of them not sell — then built an internal tool to score keywords by opportunity, demand, and dominance, and turned it into a SaaS once it actually worked.
JustNiches' core differentiator is the Opportunity Score: a 0–100 number that combines five factors (total competition, ratio of products with under five reviews, median review count, popularity, and average rating) into a single decision-friendly answer. Instead of squinting at four separate metrics, you get one score and a confidence breakdown. The tool also analyzes up to five pages of TPT search results — about 120 products — so you see the long tail of competition, not just the established sellers on page 1.
What JustNiches does not do: it isn't a sales-tracking Chrome extension (try TpT Informer for that), it doesn't run an affiliate dashboard for resellers, and it doesn't have the brand maturity of a tool that's been around since 2019. It's a younger product with a tighter feature focus.
Feature deep-dive
1. Opportunity Score: the headline metric
JustNiches' Opportunity Score is the reason most users try the tool. Each component contributes a weighted slice — competition gets up to 20 points, low-review ratio another 20, median reviews 10, popularity 30, and rating 20 — for a 0–100 total. A keyword that scores 75+ usually means demand exists, products are not all five-star established giants, and the long tail has under-optimized titles you can outrank.
SellerSpy reports the underlying data points but does not synthesize them into a single comparable number. That's a deliberate choice — they let users weight things themselves. If you're a researcher who already has a mental model, you may prefer SellerSpy's neutrality. If you want a defensible "yes / no / maybe" answer per keyword, JustNiches' score is the more direct workflow.
2. Multi-page competition analysis
Most TPT tools — including SellerSpy in its standard view — analyze the first page of search results. That gives you the obvious top sellers, but it hides the long tail of mid-rank competitors who are easier to displace. JustNiches Pro fetches up to five pages (about 120 products), so the competition score reflects the realistic landscape, not the top 24 listings. If you've ever picked a "low competition" keyword based on page 1 and then realized pages 2–5 were stuffed with stale-but-still-ranking listings, you already know why this matters.
3. Google Trends integration
JustNiches Pro includes a built-in Google Trends curve for any keyword. That tells you whether a search term is genuinely growing, seasonally cyclic, or quietly fading — without having to switch tabs into trends.google.com and re-type the keyword. SellerSpy doesn't bundle Google Trends, so the seasonal signal is something you'd reconstruct manually.
4. Title and description optimization signals
Both tools include a title analyzer. JustNiches additionally surfaces "% of top results with the keyword in the title" and "% with it in the description" — two numbers that tell you whether competitors are even bothering to optimize for the term. A high-popularity keyword with a 20% title-match rate is a gift: half the SERP is leaking traffic to anyone who optimizes properly. SellerSpy's title analysis exists but doesn't expose the same SERP-level optimization gap directly.
5. Pricing model
JustNiches sits at $9/month or $70/year for Early Adopters (locked-in forever as long as the subscription stays active; the regular annual price moves to $99). Unlimited is $39/month. Free tier is 10 searches/day, no credit card. SellerSpy's published pricing is generally higher per month for the equivalent comparison tier — check their site for the current numbers, since both tools occasionally adjust pricing. For solo sellers and side-hustle teachers, JustNiches' Early Adopter year tends to be the cheapest path to a full feature set.
When to choose SellerSpy
SellerSpy is the better pick if any of these apply
- You've used SellerSpy for a year or more, your workflow already runs on it, and changing tools means re-learning something that already works.
- You actively contribute to the SellerSpy affiliate program (or want to). They've built a more mature reseller dashboard than JustNiches has.
- You prefer to see raw underlying metrics rather than a single synthesized score, and you have your own mental model for weighting demand vs competition.
- You sell into the SellerSpy podcast / community ecosystem and want continuity with the tools the other guests reference.
If you fit one of these descriptions, switching tools just to save a few dollars per month is rarely worth the workflow disruption. Both products are good — pick the one whose mental model matches yours.
When to choose JustNiches
JustNiches is the better pick if any of these apply
- You're a newer TPT seller (under two years) and want a single Opportunity Score to make "yes / no" decisions per keyword without learning a four-metric weighting system.
- You sell into competitive subjects (ELA worksheets, math centers, holiday-themed printables) where understanding pages 2–5 of competition matters as much as page 1.
- You want Google Trends data inline, not in another tab.
- You want bilingual UI (English / Thai) — JustNiches is the only TPT-focused tool that ships Thai out of the box.
- You're price-sensitive and want the most feature-complete tier under $80/year locked in.
The free tier is the best test: pick three keywords you already know are competitive in your subject area and see if the Opportunity Score lines up with your gut. If the scores match what you'd intuitively rate the niches, the tool is calibrated correctly for your category and worth upgrading.
What sellers are saying
"Real testimonial slot — collecting first three before publishing."— Founder note
"Real testimonial slot — collecting first three before publishing."— Founder note
"Real testimonial slot — collecting first three before publishing."— Founder note
Frequently asked questions
Is JustNiches a free SellerSpy alternative?
JustNiches has a forever-free plan with 10 keyword searches per day, no credit card required. That's enough to test the tool against your existing keyword shortlist before deciding whether to upgrade.
Does JustNiches have an Opportunity Score like SellerSpy?
JustNiches has its own 0–100 Opportunity Score that combines five factors: total products, ratio of products with under five reviews, median review count, popularity, and average rating. SellerSpy publishes its own metrics but does not synthesize them into a single comparable score.
How does pricing compare?
JustNiches Pro is $9/month or $70/year for Early Adopters (regular price moves to $99/year). Unlimited is $39/month. SellerSpy's published pricing has historically been higher per month for the comparable tier; check their site for current pricing.
Can JustNiches analyze more than the first page of TPT results?
Yes. JustNiches Pro analyzes up to 5 pages (about 120 products) so you see the long tail of competition, not just the established sellers on page 1.
Do I need both tools?
No. They overlap heavily on keyword suggestions and basic competition data. Pick the one whose scoring methodology fits how you actually decide what to create.
Does JustNiches integrate with Google Trends?
Yes — JustNiches Pro shows the Google Trends curve for any keyword so you can spot seasonal demand and rising terms. SellerSpy does not bundle Google Trends data in the comparison tier.
Can I export results to CSV?
Both tools support CSV export. JustNiches Pro and Unlimited include unlimited exports; the Free plan supports preview-level exports.
Is JustNiches built by an actual TPT seller?
Yes — JustNiches is built and maintained by a working TPT seller. Every scoring change is tested against real listings before shipping. See the About page for the founder's profile.
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