Threecolts review: Seller 365, Margin Pro, UniCon and AI Operator for marketplace sellers. Seller 365+ plans from $65/mo billed annually, 14-day free trial.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Threecolts is a commerce software company serving Amazon and marketplace sellers, brands and vendors. Its website describes the platform as one that more than 30,000 sellers and brands use to protect margin and run leaner without adding headcount. The product line covers margin recovery, catalog syndication, seller operations, vendor finance and AI automation.
The company was founded in 2021 by Yoda Yee and says it grew by acquiring and integrating commerce technology companies. Tools such as InventoryLab and Tactical Arbitrage now sit inside its Seller 365 bundle. Threecolts frames its goal as replacing fragmented spreadsheets, disconnected apps and manual work with a single operating system for commerce.
Threecolts is organized as separate products that can be bought on their own or together. Seller 365 bundles ten tools under one login, one bill and one support team. Margin Pro audits vendor deductions, FBA losses and carrier overbilling, files claims and tracks them until they are paid. UniCon manages a central catalog across marketplaces.
Retail 365 connects purchase orders, invoices, payments and deductions from Vendor Central data into one Amazon Vendor P&L view. AI Operator accepts plain-English requests and acts inside connected Threecolts tools for Amazon sellers. Onsite Support is listed as a product that turns support tickets into an operational workspace, though the sources give few details about it.
On the sourcing side, Tactical Arbitrage searches more than 1,400 retailers and uses a 7-stage AI pipeline to match products to Amazon listings when no barcode exists. ScoutX checks ASINs for gating, hazmat and brand restrictions. ScoutIQ and Scoutify add mobile scanning, including offline scanning and real-time Amazon pricing for profit, ROI and fees.
InventoryLab guides listing, MSKU generation, box content labels and shipment tracking without opening Seller Central. SmartRepricer reprices within 60 seconds using a 16-rule engine with margin floors and fee bracket protection. FeedbackWhiz covers compliant feedback requests, catalog alerts for Buy Box loss and suppressions, and per-unit profit tracking.
Threecolts is an ecommerce software platform for marketplace sellers, brands and vendors. Its products include Seller 365, Margin Pro, UniCon, Retail 365 and AI Operator. The company says more than 30,000 sellers and brands use it.
Seller 365+ costs $69/mo for Standard, $129/mo for Teams and $199/mo for Pro on monthly billing. Annual billing lowers these to $65, $119 and $183 per month. UniCon starts at $49/mo as an add-on, and Enterprise pricing is custom.
Seller 365+ plans include a 14-day free trial. Users get 7 days instantly and 7 more after connecting an Amazon Seller Pro or Walmart Seller account. UniCon also lists a free trial.
Seller 365 includes Tactical Arbitrage, ScoutIQ, Scoutify, ScoutX, InventoryLab, InventoryLab Accounting, SmartRepricer and three FeedbackWhiz tools (Emails, Alerts, Profits). AI Operator is also included with a monthly usage allowance.
UniCon connects to Amazon, Walmart, Shopify, TikTok Shop, Shein, Temu, eBay and Target+. The other tools work with Amazon Seller Central and Vendor Central data. The sources do not name other integrations.
It suits Amazon resellers doing online arbitrage, retail arbitrage or wholesale, plus 3P sellers, brands and 1P vendors. Teams that want sourcing, repricing and profit tracking in one subscription are the clearest fit.
The Standard plan is aimed at independent resellers with one user, and Teams adds 10 seats for growing businesses. The trial lets small sellers test the tools before committing. Larger teams can ask about Enterprise terms.
Margin Pro finds money owed through vendor deductions, FBA losses and carrier overbilling, files the claim and tracks it until it is paid. The company offers a free audit. Pricing is not shown in the sources.