# How Rox uses Snorkel AI

**99%** Accuracy achieved with specialized evaluators

As published on [snorkel.ai](https://snorkel.ai/customer-story/how-rox-achieved-99-accuracy-with-snorkel-evaluate/), May 2025. Captured by usedby on 2026-10-05.

- Company: [Rox](https://www.usedby.ai/companies/rox.md)
- Tool: [Snorkel AI](https://www.usedby.ai/tools/snorkel-ai.md)
- Industry: [Sales Tech & CRM](https://www.usedby.ai/companies/industry/sales-tech-crm.md)

## The use case: how Rox deploys Snorkel AI

Rox builds an AI-powered sales platform with agents that write personalized outbound emails. It uses Snorkel's evaluation suite to score its LLM-as-a-judge against human experts, improve the judge's alignment, and use it to find and fix errors in its outbound email model before shipping.

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

> Achieved 99%+ accuracy with specialized evaluators enabling sufficient trust to ship a critical email outbound feature.

- **75%**: “Using the Snorkel Evaluation Suite, Rox scored the judge against human experts and found it aligned only around 75% of the time.”
- **11%**: “The aligned judge surfaced an issue with the prototype outbound model, which used the wrong recipient name around 11% of time, enabling Rox to correct the model’s behavior.”

> Off-the-shelf models aren’t capable of delivering the quality we need to ensure our agents are accurately personalizing outbound emails.
>
> Shriram Sridharan, co-founder, Rox

Source: [snorkel.ai](https://snorkel.ai/customer-story/how-rox-achieved-99-accuracy-with-snorkel-evaluate/), captured 2026-10-05.

## Other AI tools used by Rox

- [Cartesia](https://www.usedby.ai/tools/cartesia.md) — Confirmed
- [Baseten](https://www.usedby.ai/tools/baseten.md) — Observed
- [OpenAI API](https://www.usedby.ai/tools/openai-api.md) — Observed

## Other companies using Snorkel AI

- [Defense Innovation Unit](https://www.usedby.ai/companies/defense-innovation-unit.md) — Confirmed
- [Experian](https://www.usedby.ai/companies/experian.md) — Confirmed
- [Amazon Web Services](https://www.usedby.ai/companies/amazon-web-services.md) — Observed
- [Anthropic](https://www.usedby.ai/companies/anthropic.md) — Observed
- [Brown University](https://www.usedby.ai/companies/brown-university.md) — Observed
- [Google](https://www.usedby.ai/companies/google.md) — Observed

## What usedby checked

We compared the story with its live page on 2026-10-05.

- Checked: the figure 99% is on the page; its label is our wording.
- Checked: the passage quoted above is copied word for word from the page, near the name of Rox.
- Checked: the publication date is read from the page’s own metadata, never guessed.
- Checked: Rox uses Snorkel AI. Confirmed line. Latest check across sources: 2026-10-05.
- Not checked: the result itself. We quote it; we did not measure it.

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