True Fit vs Fit Analytics vs Kiwi Sizing vs Sizely (2026)

Every size recommender promises fewer returns and better fit. Getting a straight answer on what they cost, which platforms they run on, and how well they actually work is harder than it should be. Two of the four biggest names won't show you a price without a sales call. So we pulled the numbers that are public, dated them, and set them next to ours.

How we compared these tools#

We only used facts we could check against a primary source: the vendor's own pricing page, its Shopify App Store listing, or a named third party like TrustRadius. Where a figure came from somewhere other than the vendor, the row says so. Every price here was checked in July 2026. Pricing in this niche moves, so treat the dated cells as a snapshot and click through before you commit.

We left cells blank instead of guessing. If a vendor doesn't publish its accuracy or its price, that gap is the finding. Our own numbers sit in the same table under the same rule: 96.1% exact and 96.9% within one size, measured rather than estimated. If we ask you to trust a claim, we show where it comes from.

Size recommender comparison (checked July 2026)#

True Fit in detail#

True Fit is built for large apparel brands. Pricing is handled by a sales team, not a public page, and the one dated figure we could verify is a reported floor near $1,000 per month on TrustRadius (checked July 2026). Its Shopify app has been live since July 2023 and carries a 4.0 rating from 19 reviews as of this writing.

None of that makes it a weak tool. If you run a brand with a deep catalog and the purchase data to feed a recommendation model, True Fit belongs on your shortlist, and we come back to that below. At a reported floor near $1,000 a month, though, the math rarely pencils out for a small shop or a one-person reselling operation.

Fit Analytics in detail#

Fit Analytics sits in the same enterprise lane as True Fit. The company has been independent since January 2024, and it works with roughly 250 partners. There is no public price. You request a quote, and the number depends on your catalog and your traffic.

For a large retailer already talking to vendors, that's ordinary procurement. For everyone smaller, a quote-only tool is hard to compare, which is part of why this article exists. We can't put a Fit Analytics price in the table, because there isn't a public one to put there.

Kiwi Sizing in detail#

Kiwi Sizing is the popular Shopify pick, and it's also the one whose bill tends to surprise people. The size recommender isn't on the free tier. To use it you need at least the Plus plan at $12.49 per month, which caps you at 10 recommenders. Unlimited recommenders means moving up to Ultimate at $24.49 per month (both checked July 2026).

Then there's the part that scales with your success. As your monthly orders climb, Kiwi adds an order-volume surcharge on top of the plan. It reaches up to an extra $350 per month on Plus, and up to an extra $700 per month on Ultimate, once you pass 20,000 orders a month.

In the middle of the range, the math is easy to run. A store doing 2,000 to 6,000 orders a month lands roughly between $72.49 and $144.49 per month all in, plan plus surcharge (checked July 2026). That's for the recommender alone. A recurring note from Shopify App Store reviewers in 2025 and 2026 is surprise at the surcharge. One June 2026 review put it plainly: the app "can quickly cost you hundreds a month ... without you knowing about it." The price you sign up at isn't the price you pay once the store grows.

Two more things worth knowing. Kiwi is Shopify only as of July 2026, after its WordPress plugin closed in December 2021, so it's off the table if you sell anywhere else. And it has no shoe recommender and no published accuracy figure, so you're trusting the fit logic without a number attached to it.

Other vendors you'll come across#

The size and fit space has more than four names in it. You may run into Sizebay and Bold Metrics as you shop around. 3DLOOK, Virtusize, and MySize come up as well. We left them out of the main table on purpose.

We could not put a verified July 2026 price next to each of them from a primary source, so they stay out rather than go in with a guess. That's not a knock on any of them. It's the same standard we hold ourselves to. If you're evaluating one seriously, ask for its current pricing and its accuracy methodology in writing, then hold the answer next to the dated numbers above.

What it costs at three store sizes#

Prices only mean something against real volume, so here are three stores. Every figure was checked in July 2026 and covers the size recommender only.

A small store doing about 500 orders a month can build its charts and preview Sizely's recommender free, then go live on the Store plan at $39 a month, a number that sits on the public pricing page rather than in a quote. Kiwi runs $12.49 a month for the recommender at that volume, before surcharges. True Fit and Fit Analytics both begin with a sales call, and True Fit's reported floor near $1,000 a month usually rules it out at this size.

A mid-size store at 2,000 to 6,000 orders a month is where Kiwi's surcharge shows up, landing the bill between $72.49 and $144.49 a month. Sizely stays on public plan pricing you can read before you buy, $39 a month on Store or $149 on Brand as your volume grows. True Fit and Fit Analytics are still quote-only, so you can't budget for either without a call.

A high-volume store past 20,000 orders a month is squarely in enterprise territory. Kiwi's surcharge alone can add up to $350 a month on Plus, or $700 on Ultimate, on top of the plan. True Fit's reported floor points to four-figure monthly commitments, and Fit Analytics' quote will depend on your catalog and traffic. Sizely's Brand plan is $149 a month, on the public page. This is also the size where an enterprise fit platform can earn its keep, which brings us to the honest part.

Which one fits your store#

If you're a large apparel brand with a deep catalog, a data team, and budget for a four-figure monthly tool, True Fit and Fit Analytics are legitimate picks. They're built for that scale, they've been at it for years, and the enterprise support and data modeling can pay for themselves once you're moving serious volume. We're not going to pretend otherwise. If that's you, get quotes from both and compare them properly.

If you run a Shopify store, you want a recommender live this week, and you're comfortable with a bill that grows with your orders, Kiwi Sizing does the job. Just read the surcharge tiers before you install, so the month-six invoice doesn't catch you off guard.

If you sell on marketplaces like eBay, Poshmark, or Mercari, or you run a store and want public pricing with a published accuracy number, that's where Sizely fits. You can make a size chart free in about a minute for a listing, or add the size recommender to your own product pages, sized against your own charts. Because it works from your own measured charts, you get a recommendation from day one, with no purchase history to collect first. It covers apparel and shoes, the pricing is public from $39 a month, and the accuracy is in the table above, not behind a sales call.

Whichever tool you pick, the job is the same: fewer "it didn't fit" returns. Apparel gets sent back more than any other category, and the causes are well documented in our roundup of ecommerce return statistics. A recommender is one piece of that, and there are other ways to reduce clothing returns worth stacking alongside it.

Frequently asked questions#

Is True Fit free?#

No. True Fit is sales-led and enterprise-priced, with no public free tier. The one dated figure we could verify is a reported floor near $1,000 per month on TrustRadius (checked July 2026). You get an actual price by contacting their sales team.

What does Fit Analytics cost?#

Fit Analytics is quote-only, so there is no public price. The cost depends on your catalog size and traffic, and you get it by requesting a quote. As of July 2026 the company has been independent since January 2024 and works with roughly 250 partners.

Does Kiwi Sizing work outside Shopify?#

Not anymore. Kiwi is Shopify only as of July 2026. Its WordPress plugin closed in December 2021, so if you sell on WooCommerce, a marketplace, or a custom stack, Kiwi isn't an option.

What makes Sizely different?#

Two things: public pricing and published accuracy. You can see every plan and price without a sales call, and the recommendations run at 96.1% exact and 96.9% within one size, measured rather than estimated. Sizely also covers both apparel and shoes, works on marketplace listings and store pages, and every price is public, with charts free to make and the recommender live from $39 a month on the Store plan.

Related reading#

• Ecommerce return statistics 2026
• How to reduce clothing returns
• Sizely size recommender for your store
• Make a size chart free