# Sierra vs Aisera

> A look at the two generations of AI customer service through Sierra and Aisera. Sierra, founded by Bret Taylor and Clay Bavor, raised $950M at a $15.8B valuation in May 2026 on the back of autonomous agents that take real actions. Aisera, an earlier intent-classification pioneer, was acquired by Automation Anywhere in November 2025. Together they map the shift from bots that route tickets to agents that resolve them.

## Achievements

- Sierra reached a $15.8B valuation within roughly three years of founding.
- Sierra reported about $150M ARR in under two years.
- Aisera built one of the earliest enterprise agentic platforms for IT, HR, and customer service and grew a team of 100+ AI engineers.
- Aisera raised roughly $150M and reached a ~$772M valuation before being acquired.
- Sierra signed enterprise partners including SoftBank, Kraken (utilities), IBEX, and Plaid.

## Latest updates

- **2026-08** — Sierra adds a Plaid integration so its agents can securely connect to customer bank accounts for financial workflows.
- **2026-07** — Sierra announces a partnership with SoftBank Corp. in Japan.
- **2026-05** — Sierra raises $950M at a $15.8B valuation as demand for AI agents surges.
- **2025-11** — Automation Anywhere completes its acquisition of Aisera.

## Links

- Website: https://sierra.ai
- LinkedIn: https://www.linkedin.com/company/sierra
- Twitter/X: https://twitter.com/sierra

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Profile page: https://yespress.io/sierra-aisera-agents-grew-up
Published by YesPress — https://yespress.io
Last updated: 2026-08-07