Comparison
ChannelAdvisor is a powerful multichannel commerce platform built for enterprise retailers managing inventory, feeds, and advertising across dozens of marketplaces. That breadth comes with enterprise-level complexity and cost. If you sell primarily on eBay and need one thing done well — automatic repricing that always protects your margin — Undercut is purpose-built for that job. Plans start free, scale to 10,000 listings, and every tier enforces a hard per-listing price floor so you never accidentally sell below cost.
ChannelAdvisor (now part of CommerceHub) is a multichannel platform covering product feed management, marketplace integrations, advertising automation, and repricing across Amazon, eBay, Walmart, Google Shopping, and more. That breadth is genuinely valuable for large retailers running coordinated campaigns across 10+ channels.
The trade-off is cost and complexity. ChannelAdvisor targets enterprise customers; publicly available information consistently places entry-level contracts in the hundreds of dollars per month, often with onboarding fees, annual commitments, and a significant learning curve. For an eBay seller with a few hundred or a few thousand listings who simply needs competitive prices without selling at a loss, paying for a full multichannel suite is like renting a cargo ship to cross a river.
Undercut's paid plans start at $29/month (Starter, 100 listings) and reach $199/month (Scale, 10,000 listings). There is also a permanently free tier covering 25 listings with hourly repricing and hard floor protection — no credit card ever required to start.
Undercut scans live comparable eBay listings for each of your items and sets your price to just beat the lowest competitor — by a configurable undercut amount that you define as either a fixed number of cents or a percentage of the competitor's price. Every reprice is clamped to your per-listing hard floor, so the price can never drop below the minimum you set, regardless of how low a competitor goes.
Here is a concrete example. Suppose you sell a used graphics card and set a hard floor of $160.00 and a 1% undercut rule. The lowest comparable live listing is $184.00. Undercut calculates 1% of $184.00 = $1.84, subtracts that from the competitor price, and sets your price to $182.16. The next day a competitor drops to $158.00 — below your floor. Undercut does not follow. Your price stays at $160.00, preserving your margin.
You can also set an optional per-listing ceiling. If your card occasionally spikes in demand and you want to capture upside, set a ceiling of, say, $220.00. Undercut will never push your price above that ceiling even if all competitors disappear from the results.
Reprice frequency depends on your plan: hourly on Free and Starter, and every 15 minutes on Pro and Scale.
On the Pro ($79/month) and Scale ($199/month) plans, each listing can optionally have Claude AI aggressiveness tuning enabled. This controls how fast and how far your price moves toward its already-set hard floor — it does not set the floor, change the floor, or override it under any circumstances. Think of it as a dial between cautious (hold price higher, move slowly) and aggressive (close the gap to the floor quickly when competition intensifies).
This is useful when you have listings where you prefer to hold price for a while before discounting, versus listings where you want to respond immediately. You configure the tuning per listing; there is no bulk automation of this setting. Free and Starter plans are rule-based only — no AI component.
To be clear about what the AI does not do: it does not read sales velocity, demand signals, or inventory levels as inputs. It tunes movement speed and depth toward the floor you have already defined, within the constraints of that floor and any ceiling you have set.
Undercut has five tiers. Free covers 25 listings with hourly repricing and hard floor protection — a genuine no-cost option, not a crippled trial. Starter at $29/month adds up to 100 listings. Pro at $79/month jumps to 1,000 listings, cuts repricing to every 15 minutes, and unlocks Claude AI aggressiveness tuning. Scale at $199/month handles up to 10,000 listings with the same 15-minute repricing, AI tuning, and priority support. New accounts receive a 14-day trial at Starter level with no credit card required.
Consider a seller on the Pro plan ($79/month) with 400 active listings averaging $45 each. If faster, more precise repricing improves sell-through by even 5 additional sales per month, that is 5 × $45 = $225 in additional gross revenue. After eBay's final value fee of roughly 13.25% ($225 × 0.1325 = $29.81), the incremental net revenue is approximately $195.19. Against a $79 monthly fee, that is a positive return from fewer than three extra sales — and the hard floor ensures none of those sales happen below cost.
ChannelAdvisor's repricing is one module within a much larger platform priced for enterprises running multi-marketplace operations. If eBay is your primary or only channel, you are paying for capabilities you will never use.
eBay's search algorithm, Best Match, factors in competitive pricing as a signal that influences how prominently your listings appear. Sellers who keep prices competitive without sacrificing margin are better positioned to earn visibility and sales velocity — and sales velocity is itself a Best Match ranking signal on eBay. Undercut's floor-clamped repricing means you stay competitive on price without the risk of a race to the bottom.
eBay does not have an Amazon-style formal Buy Box. Winning visibility on eBay comes from a combination of Best Match signals including price, seller feedback, listing quality, and sales history. Automated repricing addresses the price dimension systematically, freeing you to focus on listing quality, photography, and fulfillment speed.
For sellers using eBay's Promoted Listings or running a Best Offer strategy alongside repricing, Undercut's ceiling feature is particularly useful: you can set a floor that covers your cost plus fees, and a ceiling that acts as your preferred list price, letting Undercut work the range in between based on live competitor data.
14-day free trial at Starter level — no credit card required. Hard floor protection on every plan.
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Is Undercut a direct ChannelAdvisor replacement?
No — and that framing is important. ChannelAdvisor is a full multichannel commerce platform covering product feeds, advertising, and marketplace integrations across many channels. Undercut does one thing: it automatically reprices your eBay listings to beat the lowest comparable competitor while enforcing your hard price floor. If you need multi-marketplace feed management or ad automation, ChannelAdvisor or a similar platform may still be relevant. If you need focused, affordable eBay repricing, Undercut is built for that.
How does the hard price floor prevent me from selling at a loss?
When you create or edit a listing in Undercut, you set a minimum price (the hard floor) for that listing. Every time Undercut recalculates your price, it checks whether the result would fall below that floor and, if so, holds the price at the floor instead of following the competitor down. The floor is absolute — no setting, including the optional AI aggressiveness tuning, can override it.
Which plans include the Claude AI aggressiveness tuning?
AI aggressiveness tuning is available on the Pro ($79/month) and Scale ($199/month) plans. On Free and Starter plans, repricing is rule-based only — you configure a fixed-cent or percentage undercut amount and the engine applies it. The AI tuning on Pro and Scale adds an optional per-listing control over how fast and how far the price moves toward the hard floor, but it never changes or overrides the floor itself.
Can I try Undercut before committing to a paid plan?
Yes. New accounts get a 14-day trial at Starter level (100 listings, hourly repricing, hard floor) with no credit card required. There is also a permanently free tier for up to 25 listings if you want to keep using Undercut at no cost after the trial.
What repricing frequency does Undercut offer, and does it matter?
Free and Starter plans reprice hourly, while Pro and Scale both reprice every 15 minutes — the fastest cadence Undercut offers. Frequency matters most in fast-moving categories — electronics, sneakers, or trading cards — where competitor prices can shift multiple times per day. In slower categories, hourly repricing is often sufficient. The 15-minute cycle on Pro and Scale means your prices reflect the live market closely; Scale's added value over Pro is capacity (up to 10,000 listings) and priority support, not faster cycles.
Related: Compare All Undercut Plans and Pricing · How to Reprice Without Losing Margin · What Is a Price Floor? · eBay Repricing Best Practices · All Repricing Software Alternatives · How to Calculate Your Repricing ROI