STLSeller is the STLFLIX platform for people who sell 3D prints, on marketplaces or in person. It brings together, in one place, research on trending products, a pricing calculator, an AI ad generator, your marketplace orders and listings, a CRM for direct sales, a production queue and an assistant that answers questions about your own numbers. It is available to subscribers in Brazil and outside Brazil.
Getting started
The first time you log in, the Getting started screen shows a welcome video and a step-by-step guide: find products that sell (Product Finder), price with profit (Pricing calculator), create an ad with AI (Ad generator) and connect your marketplace. A counter shows how many steps you have completed.
Marketplace: Dashboard, Orders and Listings
To connect your marketplace, go to Settings > Marketplaces: the marketplaces available for your account are listed there. Once connected, your orders and listings show up in STLSeller:
Dashboard: revenue, orders, net marketplace revenue with the estimated margin, average order value, revenue over the last 30 days, best-selling products and recent orders. While no marketplace is connected, it shows sample data.
Orders: total orders, revenue, orders awaiting shipment and estimated fees, with filters by period, marketplace and status (awaiting shipment, paid, shipped, delivered, cancelled).
Marketplace listings: published products, total sales, stock, low stock and out of stock, with filters by marketplace and status.
Assistant
The assistant answers questions about your orders and products: what your best product of the month was, which fees were charged in a period, how your financial results look. It does not create new content on request: it does not generate images or write a report different from the ones that already exist; it checks your own data and answers. That is why it only works after you connect a marketplace.
Product Finder
Product Finder (in beta) shows 3D products that are selling well on marketplaces and trending models, to help you decide what to print. It gathers products from Mercado Livre (Brazil and Argentina), Etsy, Shopee and STL Finder. You can search by keyword, filter by price range, material and listing age, sort by best-selling, newest or price, and save favorites. Each product shows price, discount, number of sales, material and country. Using Product Finder does not use any credits.
Ad generator
In STLSeller, registering a product means creating an ad: the button to register your first product opens the Ad generator. The photos you upload are used by the AI as a reference to create the text, images of the product from other angles and in other settings, and the demo video. There are 7 steps, and at each one you can approve or redo:
Photos: upload 1 to 5 photos of the product (JPG, PNG or WebP).
Marketplace and plan: choose the marketplace (or the Other option, which creates a package to download and publish manually) and the plan, Core or Premium.
Information: the AI reads the photo and suggests the fields. The product name, a product description and the dimensions (width, depth and height in cm) are required. The other fields are optional and improve the ad: weight, material, voltage, color, where it is used, what it is for, what makes it different, who buys it, occasion, and more.
Text: main title with 3 variations, description, tags (on Etsy, 13 tags with a score from 0 to 100) and marketplace attributes.
Images: Premium gives you 13: 4 for the listing (cover with a white background, dimensions, features and finish detail), 4 scenes in different settings, used in the video, and 5 extras.
Video (Premium): choose the 4 images for the video.
Result: every part has a copy button, and you can download everything at once. The video takes a few minutes and appears on the same page.
Direct publishing is available for Mercado Livre and Shopee. In other cases, such as Etsy or the Other option, copy the text, download the images and the video and publish manually on the marketplace.
Plan | What it generates | Cost |
Core | 9 images, 4 SEO-optimized titles and 1 SEO-optimized description | 1 credit |
Premium | Everything in Core, plus 4 images (13 in total) and the demo video | 10 credits |
The ads you create or copy are kept in My ads, with the statuses Published, Content ready, Draft, Generating, Generating video and Failed.
Pricing calculator
The calculator suggests the selling price of each piece based on:
Printing: printer (chosen from a list with each model's power consumption, or "other printer"), electricity price, pieces per plate, print time and failure rate. Upload the G-code (.gcode or .bgcode) to fill in the time and weight automatically.
Filament: type, color, weight and price per kg. If the piece uses more than one color or material, add one filament at a time.
Pricing: start from a target price or from a minimum profit margin; enter the tax and, if you like, plan the price with a promotion already applied.
Sales channel: the channel's fees are included in the calculation.
Extra costs per unit: box, bubble wrap, label, tape, plastic bag, labor or others.
Paid traffic: ROAS targets based on the calculated margin.
You can choose the currency symbol (R$, US$, €, AR$ or MX$), but values are not converted: enter your costs in the currency you sell in.
Credits
The Credits screen shows your balance, your history and the button to buy more credits. Each credit costs US$0.99 and never expires. Choose a pack of 10 credits (US$9.90), 25 (US$24.75), 50 (US$49.50) or 100 (US$99.00), or enter another amount. Payment is by credit card, inside STLSeller.
Direct sales
For those who sell in person, at fairs or by negotiating directly with the customer.
Customers: name, phone, company and city.
Deals: create a deal per customer, choosing the product straight from your pricing calculator. Deals are shown on a board, and you drag each one between the stages: New contact, In conversation, Quote sent, Negotiating, Won (became an order) and Lost. A button opens WhatsApp with a ready-made message containing the customer's name, the price and the products; you still send it yourself, from your WhatsApp. Every won deal goes into the production queue automatically.
Points of sale (fairs and stores): register the fair, with city and date (it can repeat weekly or monthly), and the products you will take. Afterwards, enter how many of each you sold: this helps you avoid producing more than you need. It also feeds the production queue.
Summary: your deal numbers (in negotiation, closed, close rate, lost), today's and overdue follow-ups, the next point of sale and what to take to the next fair day.
Production queue
The production queue brings together everything you need to print, from three sources: what you add manually, what comes from your marketplace orders (it comes in when the order is pending and leaves when it is shipped) and what comes from won deals or points of sale in Direct sales. View the queue by order or by product (adding up the quantity of each) and filter by channel. STLSeller does not issue invoices (nota fiscal).
Ad copier
The STLSeller extension for Google Chrome copies a listing into a draft in your account. It currently works with listings from Shopee Brazil; Mercado Livre is coming soon.
Log in to your STLSeller account on the website or through the extension icon.
Open the listing on Shopee and click "Copy to STLSeller", in the corner of the page.
The draft appears in My ads.
The extension copies the title, description, price, up to 5 photos, the video and, when the listing provides them, category, attributes, variations and stock. It copies any public Shopee listing, not just yours: by copying, you confirm that you are responsible for how the content is used. Check the draft before publishing.
After copying, you can publish the ad as it is or generate new text and images with the Ad generator. We recommend generating with AI: that way the copied listing is only a reference, and you end up with a new ad, with your own text and images. Copying does not use credits; generating with AI does. If you publish without going through the generator, enter the stock manually, or the listing will not be validated.
Requirements: an active STLSeller plan, Google Chrome 111 or newer, and reloading any open listing tabs after installing the extension.
Availability by market
STLSeller is available to subscribers in Brazil and outside Brazil. Integrations vary by marketplace:
Shopee: ad copier available (Brazil).
Argentina and Etsy: orders and products are synced, but ads cannot be published through this integration yet.
Etsy: information can take up to 1 day to update.
STLSeller does not issue invoices in any market.