| eBay saved search | eBay documents alerts for newly listed matches; cadence is not specified in the reviewed US help. | Email, eBay app, or SMS/text settings are documented. | The filters saved with the eBay query. | Not assessed for this comparison. | Free with an eBay account. |
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| SearchDome | Advertises 10-minute, 15-minute, hourly, or daily schedules. | Email alerts are advertised. | Advertises price caps, seller exclusions, seller-feedback filters, and bulk Power Search. | Yes—advertises distance from a US ZIP code. | Most features advertised as free; optional Rapid Searches are paid. |
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| Item Alert | Advertises 20-second checks while a search is running. | Audio, email, or automatically opened listing tabs. | Multiple auction/fixed-price modes plus marketplace and seller restrictions. | Not established in the reviewed first-party evidence. | Advertised as free. |
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| AuctionMapper Hunt | Background monitoring with new matches collected on the My Hunts page; no speed promise. | On-site match collection, with an optional daily match-summary email linking to My Hunts when email delivery is available. | Keywords, condition, format, price band, and an item-plus-shipping-estimate cap. Numeric category and available aspect filters can be carried over from an AuctionMapper search; a department label alone is a hint. | The builder exposes ZIP and radius, but background monitoring does not enforce either. | Free. |
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