24/7
24/7 monitoring and execution — no humans needed
Pricing, analytics, data parsing, research: the routine runs around the clock — including while you sleep.
AI workflows · Custom software · For marketplace sellers
Custom AI automation, embedded into your business processes.
SellerUp is a software agency that builds custom AI automation, AI agents and bespoke internal software for marketplace sellers — Amazon first, Allegro second, plus Kaufland, Castorama and other EU platforms. Integrated into your team’s process, not bolted on as another tool.
Trusted by sellers operating across Amazon, Allegro and EU marketplaces.
More profit · Less overhead · Work that runs itself
Is this AI for the sake of the trend, or does it pay for itself?
It cuts future spend on specialists, takes the routine off your team — and above all, makes you more dangerous to your competitors.
$5–10K
$5–10K saved every month
Average across SellerUp automation projects delivered in 2023–2026: saved on staff you no longer need to hire, redundant software, and everything you hand over to automation.
Your CRM
Your own CRM, built around your metrics and your automation
Your own system, shaped to your needs: the numbers that matter to you, the automation that fits exactly you. That is the next few years — arriving early.
Sound familiar?
You open Seller Central in the morning. Fourteen things need checking. Again.
Prices
A competitor cut their price at 3 a.m. You are finding out just now.
Listings
One of your listings went suppressed — and sat like that all night.
Stock
Your bestseller has 12 days of stock left. The reorder window was last week.
Reimbursements
Amazon owes you money for lost and damaged inventory. The claims never got filed — again.
Fees
Amazon raised its selling fees again in 2025 — check the current fee schedule. Your prices never caught up fast enough.
Reports
The owner report is built by hand again: exports, spreadsheets, copy-paste.
Research
New-niche research has been sitting in the “when there is time” list for three weeks.
That is a morning without a system. And that was only seven of the fourteen.
And Sunday you spend in Seller Central again — not with your family.
Tools and metrics are scattered, every decision is made by hand — and every missed decision costs money. Humans cannot keep up. AI agents can — and should.
With SellerUp agents the morning looks different: by 7:00 the digest is already in your Telegram.
- Prices adjusted
- Reorder calculated
- Report built
- Research done
All that is left are the decisions that should not happen without you.
What we build
Which parts of your operation can software actually take over?
End-to-end engineering for marketplace sellers — built around your data, your operations, your goals. Not a SaaS subscription. A system that becomes part of your team.
AI agents in your process
Agents that watch listings, prices, inventory, ads, and supply chain — and act on rules you define. Plugged into the tools you already use.
Workflow automation
We map your operations, find the repetitive bottlenecks, and ship pipelines that run on their own — keeping your team focused on strategy.
Custom software
Internal dashboards, server-side platforms, integrations with marketplaces and suppliers. Built specifically for how your business actually works.
One system
What breaks when your marketplace runs on disconnected tools?
Signals come in messy — prices, ads, stock, competitors. SellerUp agents sit in the middle: they decide what matters, route the work, and execute inside your guardrails.
Where your business moves
Marketplaces and ad consoles — signals in, actions back.
- Amazon Ads
- Seller Central
- Walmart
- Shopify
- Allegro
- eMAG
Tools you already use
Agents read the same data your team already trusts.
- Helium 10
- Keepa
- Sellerboard
- Sellerise
- YSELL
- Seller Assistant
- Jungle Scout
Your models, your way
Built on the model that fits the task — not locked to one vendor.
- Claude Code
- OpenAI
- Gemini
- AI agents
SellerUp AI agents decide · route · execute
You stay in control
Owner dashboards, price alerts and reports — in channels you already read.
- Telegram
- Slack
- In-app
- Dashboards
Recent work
Three problems we built solutions for.
Each case is a production system shipped for a real seller. Short summaries below — full write-ups linked under each card.
01Supply chain · Forecasting
Forecasting delivery and procurement from China to Amazon and other marketplaces.
Custom pipeline that predicts inbound timing, reorder windows, and out-of-stock risk across Amazon and other marketplaces — factoring supplier lead times, freight routing, and inventory burn rate.
02Operations · Amazon
Custom internal system for an Amazon seller.
Server-side platform unifying stock, orders, suppliers, and resource planning. One source of truth for the operations team — instead of seven scattered spreadsheets.
03Multi-marketplace · Aggregation
Unified data layer across European marketplaces.
Connectors for Allegro, Amazon, Kaufland, Castorama and others — sales aggregation, ads orchestration, unit economics, and operational dashboards in one place.
Questions sellers ask before the first call
What does SellerUp actually build?
Custom AI automation, AI agents and bespoke internal software for marketplace sellers, plus the analytics layer underneath them. In practice that means agents watching listings, prices, stock and ads, pipelines that run on their own, dashboards with unit economics down to SKU, and internal platforms that replace scattered spreadsheets.
Is this a subscription, or do we own what you build?
You own it. We build a system around your business rather than renting you a seat, and the code and the data run on your infrastructure. There is no per-seat licence and no dependency on a SellerUp product. After launch we either stay on support or hand the system over with documentation and training.
Which marketplaces do you work with?
Amazon is the core and Allegro is the second line, with a dedicated service track for the Polish market. Beyond those we build integrations for Kaufland, Castorama, Leroy Merlin, eMAG, Bol and other European platforms. If a marketplace publishes a usable API, an agent can work against it.
How long before something is actually working?
A first working piece usually lands in weeks, and a full build in two to four months. Most engagements start smaller than that — a strategy session or a process and data audit that ends in a written automation plan, which you are free to execute with us or without us.
How do you work out our real profit per SKU?
By modelling your costs, not the marketplace’s view of them. We reconcile Amazon’s published referral and FBA fees against your own landed cost, freight, warehousing and salaries, so unit economics compare across platforms and agree with your accounting rather than with a dashboard someone else designed.
Start a conversation
Tell us what you’d automate.
Short brief is enough. We reply within one business day with a clear yes/no and next steps.
- Reply within 1 business day
- Honest go / no-go answer
- No “boilerplate proposal”