# How Gem uses Vespa

As published on [vespa.ai](https://vespa.ai/case-studies/gem/), October 2026. Captured by usedby on 2026-11-03.

- Company: [Gem](https://www.usedby.ai/companies/gem.md)
- Tool: [Vespa](https://www.usedby.ai/tools/vespa.md)
- Industry: [HR & Recruiting](https://www.usedby.ai/companies/industry/hr-recruiting-hr-tech.md)

## The use case: how Gem deploys Vespa

GEM, a search engine for secondhand and vintage fashion, uses Vespa to power saved image-search alerts. Vespa matches each incoming listing against stored image searches using vector similarity thresholds and structured filters such as size and price, returning every qualifying saved search.

Summary written by usedby from the source page, in English. The figures are those of Vespa and Gem, not ours.

> With saved image-search alerts running on Vespa, GEM can now notify shoppers when matching items arrive, without requiring them to repeatedly search the marketplace.

> The ability for users to save image searches is something that would not exist at all if we hadn’t started with Vespa.
>
> Sampo Karjalainen, Co-founder, GEM

Source: [vespa.ai](https://vespa.ai/case-studies/gem/), captured 2026-11-03.

## Other AI tools used by Gem

- [Amplemarket](https://www.usedby.ai/tools/amplemarket.md) — Observed
- [UserGems](https://www.usedby.ai/tools/usergems.md) — Observed

## Other companies using Vespa

- [DeviantArt](https://www.usedby.ai/companies/deviantart.md) — Confirmed
- [Onyx](https://www.usedby.ai/companies/onyx.md) — Confirmed
- [Perplexity](https://www.usedby.ai/companies/perplexity.md) — Confirmed
- [AlphaSense](https://www.usedby.ai/companies/alphasense.md) — Observed
- [Clarm](https://www.usedby.ai/companies/clarm.md) — Observed
- [Decathlon](https://www.usedby.ai/companies/decathlon.md) — Observed

## What usedby checked

We compared the story with its live page on 2026-11-03.

- Checked: the passage quoted above is copied word for word from the page, near the name of Gem.
- Checked: the publication date is read from the page’s own metadata, never guessed.
- Checked: Gem uses Vespa. Confirmed line. Latest check across sources: 2026-11-03.
- Not checked: the result itself. We quote it; we did not measure it.

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Source: https://www.usedby.ai/case-studies/gem-vespa · How we check: https://www.usedby.ai/methodology