Sell faster,
track your margins
Take photos and the AI writes everything: title, description, estimated price and hashtags. Publish to eBay, Vinted, Gumtree and more — then track your purchases, your sales and your real margins.
3 steps, 30 seconds
From the photo to the published listing, in record time.
Generate
Take up to 20 photos of your item. Our vision AI reads them and writes the title, the description, an estimated price and the hashtags.
Edit
Title, description, price, hashtags — everything stays editable. Add your notes, pick your tone. The right listing in seconds.
Publish
Copy and paste to Vinted, Gumtree or Marketplace in one tap — or publish straight to eBay from your own account, no copy-paste. See the eBay guide →
Know what it resells for before you pay
At a car boot sale, a flea market or a consignment shop: photograph an item and Postfast estimates its resale value. You see your potential margin against the asking price — and you check the real figure before your wallet comes out.
Scan on the spot
One photo is enough. The AI identifies the item — a whole job lot too, piece by piece — and estimates its second-hand market value.
Potential margin & ROI
Enter the asking price and Postfast works out your margin and your return if you resell at market value. Enough to haggle on solid ground.
Check the real price
Direct links to items that actually sold on eBay, plus Vinted and Leboncoin. The estimate is a starting point — the call is yours.
Once you have bought the item, record it in one tap: its cost joins your margin tracking. From the estimate to the sale, everything follows through.
Follow your resale margin, from purchase to sale
Postfast does not stop at the listing. Every sale is tied back to its purchase, so your real margin is worked out item by item and lot by lot.
Buy & record
Log what you buy at car boot sales, flea markets or consignment shops, by hand or from a photo. For a job lot, the cost is split automatically across items in proportion to their value.
- Price, date, source, notes and photos
- AI estimate of the resale value
- CSV import of your existing purchases
Generate & sell
Turn each item into a listing in seconds. Split a job lot into several sales (the console on its own, the games as a bundle…), publish to eBay in one tap or copy-paste elsewhere.
- An AI listing ready to publish
- Split one lot into one or many listings
- Mark as sold: price, platform fees, net
Track your margins
Every sale is linked to its purchase, so Postfast works out your real net margin and ROI. Spot your best lots, your dormant stock and anything going out at a loss.
- Net margin & ROI per sale and per lot
- Best and worst buys, by source & category
- Alerts: dormant stock, sales at a loss, time to relist
Writing the listing is only the start. Postfast runs your whole resale business: purchases, sales, stock and profitability in one place.
Write, sell, track your margins — all in one place
Postfast takes the repetitive work off your hands so you can get on with the part that matters: selling.
AI photo analysis
Take up to 20 photos of your item. The AI recognises the object, the brand, the condition and the details that matter, on its own.
Title & description
The AI writes a title that gets found and a description that sells, shaped for the platform you are posting to.
Price estimate
Get a fair price from a read of the market, with direct links to items that actually sold on eBay, plus Vinted and Leboncoin, so you can check it.
Sharp hashtags
Relevant hashtags written for you, to get your listings seen — on Vinted above all.
Multi-platform
27 platforms across 13 countries — eBay, Vinted, Gumtree, Depop, Marketplace, DoneDeal, Wallapop, Kleinanzeigen and more. Only the ones available where you are will show up.
AI photo retouching
A neutral studio background, a styled setting, or an invisible mannequin for clothing. Signs of wear are preserved: the item is presented better, not disguised.
Batch creation
Set up your items back to back and let the generation run in the background: the first listing opens while the others are still being written. Up to 20 at once.
One-tap eBay publishing
Connect your eBay account and publish straight from the app, no copy-paste. Official secure connection (OAuth), revocable whenever you want. Guide →
Purchases & margins
Record what you buy at car boot sales and consignment shops, follow the real profitability of every item and keep a grip on your stock. Reselling becomes a real business.
Make the AI yours
Pick the tone, switch emojis on or off, add your own intro and sign-off. The AI writes the way you sell.
Seller profile
Fill in your profile: private seller or trader, the categories you sell, how you ship, your Vinted handle. The AI folds it into every listing.
Tracking & profitability
A full dashboard: revenue, net margin, ROI, dormant stock, your best and worst lots, and sales by platform, source and category — with alerts on anything going out at a loss.
Easy relisting
An item is not moving? Relaunch it in one tap. Filter for listings due a relist and put them back up across your platforms.
Your country, your platforms, your language
Postfast was built for the French second-hand market and still is. But you might be selling from London, Dublin or Berlin: pick your selling country and the app lines up with what actually exists where you are.
13 selling countries
The United Kingdom, Ireland, France, Belgium, Switzerland, Luxembourg, Germany, Austria, the Netherlands, Spain, Italy, Portugal and Poland. You pick yours when you sign up, and you can change it whenever you like.
The app in 8 languages
The interface is translated into English, French, Spanish, Italian, German, Dutch, Portuguese and Polish. It follows your phone's language, and you can change it in the settings.
The AI writes in 8 languages
Your listings are written in all eight languages of the app — English, French, Spanish, Italian, German, Dutch, Portuguese and Polish. Each of the thirteen selling countries has its own, and you can ask for up to three on the same listing.
Three separate settings, on purpose: the language of the app, the language your listings are written in, and your selling country. A British seller living in Berlin keeps the app in English, publishes on Kleinanzeigen, and has listings written in English.
Simple: free, or no monthly limit
Every feature is in the free plan. We only charge for volume: listing generations and photo retouches.
- ✓ Full AI generation (title, description, price, hashtags)
- ✓ Every platform in your country, eBay publishing included
- ✓ Purchase tracking, margins & dashboard
- ✓ 3 free photo retouches, once
- ✓ Batch creation: 5 listings at a time
- ✓ CSV export included
or €69.99 / year — soon €89.99
- ✓ Everything in Free
- ✓ Listing generation with no monthly limit
- ✓ AI buying estimates with no monthly limit
- ✓ 10 photo retouches per month
- ✓ Batch creation: 20 listings at a time
- ✓ Built for high-volume resellers & traders
Need more photo retouches? Packs are sold one-off, no subscription: 30 retouches for €2.49, 70 for €4.99 or 180 for €9.99. They work on the free plan just as well as on Plus.
Frequently asked questions
Postfast uses the latest generation of AI vision models. You take photos of your item and the AI identifies the object, the brand, the condition, the dimensions and every detail worth putting in a complete listing.
It depends on your selling country: you pick it when you sign up, and Postfast only shows the platforms that actually exist where you are. In the UK that means eBay, Vinted, Gumtree, Depop and Facebook Marketplace; in Ireland, DoneDeal and Adverts.ie join them. Across 13 countries, 27 platforms are covered in total — including Kleinanzeigen in Germany, Wallapop in Spain, Subito in Italy, Marktplaats in the Netherlands and Leboncoin in France.
Yes, and eBay is the only platform where publishing goes through an API. Connect your eBay account with the official secure flow (OAuth) and publish in one tap straight from Postfast. Everywhere else, Postfast writes the text and copies it for you: publishing stays an assisted copy-paste. Postfast never sees your password, and you can revoke the connection at any time. Our eBay guide walks you through it.
Yes, and it is the heart of the app. Record your purchases (including job lots, with the cost split across items automatically), link each sale to its purchase, enter the sale price and the platform fees: Postfast works out your real net margin and ROI. The dashboard then shows your best and worst lots, your dormant stock, your sales per platform, and flags anything sold at a loss.
The AI estimates a price from what it knows of the second-hand market. On top of that, Postfast gives you direct links to comparable sales on eBay (real sold prices), Vinted and Leboncoin so you can check the figure and adjust it yourself.
Yes. In Buying mode, photograph an item at a car boot sale, a flea market or a consignment shop: Postfast estimates its resale value and your potential margin against the asking price, and links you to real eBay sales so you can verify. The estimate helps you decide with your eyes open — the decision to buy stays yours.
The app and the AI work in the same eight languages: English, French, Spanish, Italian, German, Dutch, Portuguese and Polish. The interface is translated into all eight, and listings are written in all eight. The two settings stay separate: you can run the app in Polish and have your listings written in English, or ask for up to three languages on the same listing.
Yes. When you sign up you choose your selling country from 13: France, Belgium, Switzerland, Luxembourg, Germany, Austria, the Netherlands, Spain, Italy, Portugal, Ireland, the United Kingdom and Poland. Postfast then narrows the platform list to what genuinely exists where you are, and pre-selects the country's two dominant channels. You can change country at any time in the settings.
From one of your photos, the AI produces a version that sells better: a neutral studio background, a styled setting, or an invisible mannequin for clothing. Signs of wear and defects are preserved — the point is to present the item better, not to disguise it. The free plan includes 3 retouches once, PostFast Plus gives 10 per month, and packs of 30, 70 or 180 retouches start at €2.49.
Yes. With batch creation you set up your items one after another, then start the generation in the background: the first listing opens for review while the rest are still being written. The free plan allows 5 listings per batch, PostFast Plus allows 20.
Absolutely. You choose the tone (casual or professional), turn emojis and hashtags on or off, and add your own intro and sign-off to every listing. The AI writes in your voice.
Up to 20 photos per item. The 5 best are sent to the AI for analysis, and all of them stay available for your listing. Photos are compressed intelligently so uploads stay fast.
Yes. Your photos are sent securely to the AI for analysis and are not kept beyond processing. Your personal data is hosted on Supabase (European infrastructure) and protected in line with the GDPR.
Sell fast,
sell smarter
Your photos become listings, and your business stays under control: purchases, sales, margins. Free, on iOS & Android.
