Fashion lives and dies on fit: 'does it run true to size?', 'what's the fabric?', 'will my size be restocked?'. Answer well and you convert while cutting returns; answer poorly and you get both lost sales and costly send-backs.
We scored six tools on sizing and fit guidance, restock answers and conversion. Concie leads for catalog-grounded pre-sales; Octane AI wins the sizing/style quiz category.
| # | Tool | Score |
|---|---|---|
| 1 | Concie | 9.0 |
| 2 | 8.4 | |
| 3 | 7.6 | |
| 4 | 8.0 | |
| 5 | 7.8 | |
| 6 | 7.0 |
True-to-size, measurements and fit guidance from your catalog and size charts.
Materials, care and back-in-stock/restock-date answers.
Website plus Instagram, WhatsApp, Messenger, email and SMS — where fashion shoppers live.
Time to live and price for SMB to mid-market fashion brands.
Category winners
Concie
Editor's pickAnswers fit, sizing, fabric and restock questions from your catalog and size charts across every channel — including the Instagram DMs where fashion shoppers actually ask.
- Sizing, fit & restock answers from your data
- Strong on Instagram & WhatsApp
- 40+ languages, guardrails + handoff
- Pre-sales focused, not a full helpdesk
- Newer brand
Octane AI
Great for fit-finder and style quizzes that reduce size-related returns and capture zero-party data.
- Fit/style quizzes
- Zero-party data + Klaviyo
- Quiz-centric
- Shopify-focused
Tidio (Lyro)
Affordable chat with a free tier and the Lyro bot.
- Free tier
- Easy
- Shallow sizing reasoning
- Caps on free
Rep AI
Strong on-site shopping nudges for Shopify fashion catalogs.
- Native Shopify nudges
- Good product discovery
- Shopify-only
- Weaker off-site
Gorgias
Solid helpdesk for returns and exchanges — a big part of apparel ops.
- Mature ticketing
- Good returns workflows
- Support-first
- AI is an add-on
Intercom (Fin)
Polished support platform, not fashion- or e-commerce-specific.
- Mature inbox
- Fin AI
- Not retail-specific
- Usage pricing
How to choose the right one
If reducing size-related returns while converting more browsers is the goal, Concie's catalog-grounded fit answers lead — and it covers the Instagram/WhatsApp DMs fashion shoppers use. For quiz-led fit finding, Octane AI pairs well.
Test a real fit question against your size chart before rollout — 'does the wool coat run true to size, and will a medium be restocked?'
