Our approach: Through our own testing and client feedback, we gathered these comparison points to reflect not just product specs but how these tools perform in practice from an end-consumer perspective. This guide was put together by our product and commercial team who is exposed to the market on a daily basis.
We strive to be as honest as humanly possible and tell you where we don't have enough information to compare. We don't shy away from introducing direct competitors publicly, because we believe that if you run an underwear or swimwear business, Brarista is the most complete and helpful AI solution available. If you spot anything that needs clarification or updating, we welcome your feedback. This guide was last reviewed in May 2026.
Prime AI gives personalised size recommendations.
For Brarista, that is where we start.
Lingerie intelligence starting at the product level, not just the point of sale
Prime AI's Bra Size Finder analyses body measurements, preferences, and garment data, learning from sales data over time. For retailers looking for a fast, lightweight plug-in, it is a practical choice.
The limitation is that it intervenes at the point of sale, working with the product data and size chart you already have - which, across the lingerie industry, is accurate only 10% of the time. Brarista starts well before that. During onboarding, our team consults directly on your product catalogue, size chart, and brand- and product-specific fit logic, identifying inconsistencies before they ever reach a shopper. This includes unconventional and bespoke sizing systems that cannot be mapped without specialist input. That intelligence comes from two layers: a baseline of specialist lingerie knowledge co-built with professional fitters, which exists independently of anything your brand provides, and a brand-specific layer built during onboarding. One informs the other.
20k+
real fit records
Bella Trang Ngo
Leslie Lee
I have weak arms which bras work?
Lily Brooks
What's my size in this product?
Anna Reed
Bought one of your bras and the cup are gaping.
Mia Carter
When will the Jade bra be back in stock?
All-in-one conversational AI, built around your brand's voice
Prime AI's approach centres on a structured questionnaire: a shopper inputs their preferences and receives a size recommendation.
Brarista offers that too, but the experience goes further. It holds live conversations that handle fitting edge cases ("I'm in between a 34D and a 32DD"), respond to styling context ("I need this for a backless wedding dress"), suggest sister sizes when a preferred size is out of stock, and guide shoppers through the kind of industry-specific nuance that a size finder cannot capture. Brarista handles customer service queries too, all in your brand's voice. For lingerie retailers, that means one tool handling the full breadth of what a shopper needs, from "what size am I?" through to "would this work under a v-neck?" and "how do I exchange, and what size should I go for?"
Visual fit guidance rooted in fit-by-eye expertise
Brarista's fitting logic is anchored to the fit-by-eye standard used in specialist boutiques. That expertise runs through everything: a fitting quiz that incorporates real fit models of different sizes with visual and video guidance, and a breast shape quiz that assesses spacing, fullness, asymmetry and more. Because Brarista has dedicated fitting logic for maternity, sports, post-surgery, and first bra shoppers, each scenario becomes a distinct fitting experience rather than a generic output.
Prime AI's tool relies on measurement inputs with limited visual guidance. And without specialist logic for different life stages, entire customer segments - the ones with the most specific needs - are left with a generic recommendation.
Full Coverage
Asymmetric Breasts
Your Brarista size is:
32DD
Some items
chosen for you:
Lace Bralette
AI Recommended Size:
32DD
Lace Bra
AI Recommended Size:
80C
Push-Up Bra
AI Recommended Size:
S
Your recommended
bra styles are:
J-hook
Convertible straps
Demi cup
Plunge
Stretchy cup edges
Integrated into your desired customer journey vs. only on product detail pages
Every lingerie retailer we speak to has a different setup. Some already have tools they want to keep. Some want fitting support on specific pages only. Some want it everywhere. A one-size-fits-all deployment was never going to work, and Brarista was built with that in mind.
While Prime AI's Bra Size Finder exists on the product detail page, Brarista can be deployed wherever your customer journey demands it - as a full site chatbot guiding shoppers from browse to post-purchase, a mini chatbot embedded directly on product pages at the exact moment a shopper is deciding whether to buy, or as a standalone sidebar quiz for quick fit verification and size selection. Each format is fully customisable to your brand's tone of voice, styling, and fit philosophy. Read more about our products here.
Fitting expertise
Product recommendation intelligence
UX optimisation and customisation
Analytics and reporting
Ease of integration
+++
++++
Pricing
£££
£££ (Comparable)
Conversational guidance that feels human
"The team really listened to our needs and understood that our customer is going through a very specific stage of life. The conversational size recommendation feels human and reassuring, which aligns beautifully with our brand. I was also pleasantly surprised by how much it helps educate customers about their changing bodies. That added layer of support makes a real difference for our community."
Caroline Rowland - Founder & Director of Marbra
17 bespoke sizings mapped & embedded
"Many of the questions we receive are about issues that are very common, but where clear, accessible information is hard to find. Overall, it’s been a really valuable collaboration and I believe any lingerie brand would benefit from working with them. I especially appreciate their thoroughness and commitment to ensuring the chatbot is secure, reliable, and fully aligned with our brand values."
Kate Taylor - Founder & Director of Evenly
Deep understanding of bra fit and sizing
"The team clearly understands the technical nuances of fit for different chest types. They've been proactive in tailoring the quiz logic to our specific silhouettes, making it feel like a genuine partnership rather than just a plug-in.
The visual component and level of detail of their size and shape quiz is a standout. It's high-tech and aligns perfectly with our 'Engineered for Fit' ethos."
Louise Chen - Founder of LOU Swim
AI Customisation
Share your product catalog and customisation requirements with us to tailor the experience to your brand.
Demo & Integration
While we integrate the AI into your site, you can test the demo with your team and VIPs. We’ll gather feedback and fine-tune the solution.
Launch - or money back!
We'll launch and monitor the first 3 months on a daily basis to make sure everything works. And if we don't go live due to our technical limitation - it's full refund on the onboarding fees!
