# Observe Ai vs Sierra: who uses which

On usedby, 24 companies use Observe Ai and 50 use Sierra. 1 company uses both, including SoFi. 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: 73 of 74 public lines checked.

## Side by side

|  | [Observe Ai](https://www.usedby.ai/tools/observe-ai.md) | [Sierra](https://www.usedby.ai/tools/sierra.md) |
|---|---|---|
| Public customers | 24 | 50 |
| Confirmed | 23 | 37 |
| Observed | 1 | 13 |
| Signals (job posts) | 0 | 0 |
| Top industries of customers | Fintech & Payments (3), HealthTech & Digital Health (2), Insurance & InsurTech (2) | Fintech & Payments (5), Telecommunications (3), Banking & Mortgages (2) |
| Category | Customer Service Automation | Customer Service Automation |
| Data residency | US, CA, EU, AU ([observe.ai](https://www.observe.ai/platform/trust-security-responsible-ai), checked 2026-10-07) | — |
| Integrations | Salesforce, ServiceNow, Shopify, Slack from Salesforce, Snowflake, Tableau from Salesforce, Talkdesk, Genesys, Five9, Zendesk, Zoom, Amazon Connect ([observe.ai](https://www.observe.ai/platform/integrations), checked 2026-10-07) | — |
| Data processing terms | — | A data processing agreement is available. ([sierra.ai](https://sierra.ai/privacy-policy), checked 2026-10-04) |

## Companies named on both

Confirmed or observed on each side. The first public proof is not an adoption date.

| Company | First public proof, Sierra |
|---|---|
| [SoFi](https://www.usedby.ai/companies/sofi.md) | On or before September 2025 |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Observe Ai: [Personify Health](https://www.usedby.ai/case-studies/personify-health-observe-ai.md): **100%**: “With 100% QA coverage—up from just 2%” (captured by usedby 2026-10-05)
- Observe Ai: [Boundless Learning](https://www.usedby.ai/case-studies/boundless-learning-observe-ai.md): **90+**: “Elevated focus of 90+ advisors toward high-value, learner-centered conversations” (captured by usedby 2026-10-05)
- Sierra: [RunBuggy](https://www.usedby.ai/case-studies/runbuggy-sierra.md): **1,000 hours**: “Nearly 1,000 hours per month returned to exception handling and high-value work” (published 2026-02-03)
- Sierra: [Next](https://www.usedby.ai/case-studies/next-sierra.md): **6 weeks**: “Time to live 6 weeks” (published 2026-02-25)

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