# Fieldguide vs Trullion: who uses which

On usedby, 35 companies use Fieldguide and 20 use Trullion. 1 company uses both, including Rehmann. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-10: 55 of 55 public lines checked.

## Side by side

|  | [Fieldguide](https://www.usedby.ai/tools/fieldguide.md) | [Trullion](https://www.usedby.ai/tools/trullion.md) |
|---|---|---|
| Public customers | 35 | 20 |
| Confirmed | 7 | 10 |
| Observed | 28 | 10 |
| Signals (job posts) | 0 | 0 |
| Top industries of named customers (confirmed or observed) | Accounting & Audit (28), Management Consulting (1) | Accounting & Audit (4), Telecommunications (3), Advertising & AdTech (1) |
| Category | Finance & Accounting AI | Finance & Accounting AI |
| Data processing terms | A data processing agreement is available. ([fieldguide.com](https://www.fieldguide.com/trust), checked 2026-10-08) | A data processing agreement is available. ([trullion.com](https://trullion.com/privacy-policy/), checked 2026-10-08) |
| Integrations | — | Netsuite, Secure File Transfer Protocol ([trullion.com](https://trullion.com/product-updates/integrations-for-effortless-workflows/), checked 2026-10-08) |

## Companies named on both

Confirmed or observed on each side.

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

## Published results

Reviewed stories only; usedby did not measure the figures.

- Fieldguide: [Holbrook & Manter](https://www.usedby.ai/case-studies/holbrook-manter-fieldguide.md): **35-50%**: “Holbrook & Manter’s teams are already saving 35-50% in hours per engagement.” (captured by usedby 2026-10-07)
- Fieldguide: [BerryDunn](https://www.usedby.ai/case-studies/berrydunn-fieldguide.md): **75%**: “helping reduce the amount of on-site travel by 75%” (captured by usedby 2026-10-07)
- Trullion: [GRF CPAs & Advisors](https://www.usedby.ai/case-studies/grf-cpas-advisors-trullion.md): **40%**: “workflow time was reduced by 40%” (published 2023-10-04)
- Trullion: [Claroty](https://www.usedby.ai/case-studies/claroty-trullion.md): **90%**: “Over 90% time savings” (published 2024-06-14)

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