# Ivo vs Sirion: who uses which

On usedby, 25 companies use Ivo and 24 use Sirion. 1 company uses both, including IBM. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-07: 49 of 49 public lines checked.

## Side by side

|  | [Ivo](https://www.usedby.ai/tools/ivo.md) | [Sirion](https://www.usedby.ai/tools/sirion.md) |
|---|---|---|
| Public customers | 25 | 24 |
| Confirmed | 14 | 11 |
| Observed | 11 | 13 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Marketing Tech (3), Media & Publishing (3), DevTools & Infrastructure (2) | Energy, Utilities & Cleantech (3), Biotech & Pharma (2), Aerospace & Defense (1) |
| Category | Legal AI | Legal AI |

## Companies named on both

Confirmed or observed on each side.

| Company |
|---|
| [IBM](https://www.usedby.ai/companies/ibm.md) |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Ivo: [Sunrider](https://www.usedby.ai/case-studies/sunrider-ivo.md): **weeks to hours**: “Cut review time from weeks to hours” (captured by usedby 2026-10-07)
- Ivo: [Vantage Data Centers](https://www.usedby.ai/case-studies/vantage-data-centers-ivo.md): **4–5+ hours**: “Large GC and construction agreements: Saving 4–5+ hours per review” (captured by usedby 2026-10-07)
- Sirion: [DP World](https://www.usedby.ai/case-studies/dp-world-sirion.md): **~80%**: “DP World Cut Contract Cycle Time by ~80%” (published 2026-05-30)
- Sirion: [Zalando](https://www.usedby.ai/case-studies/zalando-sirion.md): **80,000+**: “80,000+ contracts ingested using AI-driven extraction, deduplication, and quality controls” (published 2026-05-31)

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