# Sardine vs Unit21: who uses which

On usedby, 32 companies use Sardine and 40 use Unit21. 3 companies use both, including Intuit, Gusto and FIS. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-08: 72 of 72 public lines checked.

## Side by side

|  | [Sardine](https://www.usedby.ai/tools/sardine.md) | [Unit21](https://www.usedby.ai/tools/unit21.md) |
|---|---|---|
| Public customers | 32 | 40 |
| Confirmed | 9 | 21 |
| Observed | 23 | 19 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Fintech & Payments (6), HR & Recruiting (2), DevTools & Infrastructure (1) | Crypto & Web3 (3), Fintech & Payments (3), HR & Recruiting (2) |
| Category | Fraud & AML | Fraud & AML |
| Security | — | SOC 2 Type II ([unit21.ai](https://www.unit21.ai/security), checked 2026-10-07) |
| Integrations | — | AIPrise, Alacriti, Alkami, Aurora MySQL, Bankjoy, BigQuery, Castle, Chainalysis, Corelation, Databricks, Elliptic, Finastra ([unit21.ai](https://www.unit21.ai/integrations), checked 2026-10-07) |

## Companies named on both

Confirmed or observed on each side.

| Company |
|---|
| [Intuit](https://www.usedby.ai/companies/intuit.md) |
| [Gusto](https://www.usedby.ai/companies/gusto.md) |
| [FIS](https://www.usedby.ai/companies/fis.md) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Sardine: [RAISE](https://www.usedby.ai/case-studies/raise-sardine.md): **45%**: “Raise has cut chargebacks by 45%” (captured by usedby 2026-10-08)
- Sardine: [Asoview](https://www.usedby.ai/case-studies/asoview-sardine.md): **under a month**: “Asoview's in-house development team handled the integration and was live in under a month” (captured by usedby 2026-10-08)
- Unit21: [Sila](https://www.usedby.ai/case-studies/sila-unit21.md): **2 days**: “Audit-ready in 2 days rather than 2 weeks” (captured by usedby 2026-10-07)
- Unit21: [Metal Pay](https://www.usedby.ai/case-studies/metal-pay-unit21.md): **50%**: “each analyst now spends 50% less time on cases and filings” (captured by usedby 2026-10-07)

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Source: https://www.usedby.ai/compare/sardine-vs-unit21 · How we check: https://www.usedby.ai/methodology