Organization
Sierra
Sierra is an enterprise software company headquartered in San Francisco, California132. This catalog lists 1 evaluation tool from Sierra, under licenses including the MIT License.
Documented roles: Enterprise software
Sierra provides a platform on which businesses build and run AI agents for customer service and customer experience, deployed across chat, messaging, email, and voice. It also maintains τ-bench, an open-source benchmark for evaluating customer-service agents.48911
Using this organization’s offerings
The detailed audience, self-hosting, pricing, and restrictions review has not yet been completed. Consult the sourced product records below and the publisher’s current terms. Missing detail means unknown, not unavailable.
Key facts
- Ownership (separate from openness)
- Privately held
Recorded classification; fact-level ownership verification pending.
- Legal form
- Delaware corporation1
- Founded
- Unknown
- Sectors
- Enterprise, Agents
What is and isn’t public
Products
No hosted model products are recorded for this organization.
Other products
| Product | Kind | Documented delivery and access | Reviewed |
|---|---|---|---|
| Agent Studio (external site: sierra.ai) | Enterprise software | No-code tool in Sierra's platform for customer-experience teams to build and manage AI agents from composable building blocks.6 | Sep 29, 2026 |
| Ghostwriter (external site: sierra.ai) | Enterprise software | AI assistant within Sierra's platform for building and improving agents, including creating agents from standard operating procedures, transcripts, or plain-language descriptions.75 | Sep 29, 2026 |
| Channels (external site: sierra.ai) | Enterprise software | Deployment of Sierra agents to voice calls, website and in-app chat, WhatsApp, Apple Business Chat, SMS, email, live-assist tools for human staff, and ChatGPT.8 | Sep 29, 2026 |
Cataloged artifacts
Evaluation tools
- τ-bench (tau2-bench)Evaluation toolAvailability: Public
Notable documented facts
- Sierra's modern slavery statement for the financial year ending January 31, 2026 identifies Sierra Technologies Ltd as its UK subsidiary.1
In the news
Sierra releases τ-bench 2.0.0 with six language packs and frozen voice and text benchmarks
Sierra's τ-bench repository published τ-bench 2.0.0, which its release notes date October 19, 2026 and title "Multilingual and Voice". The notes say a
--languageoption now selects one of six language packs (English, Spanish, Portuguese, Hindi, Chinese and Korean) with localized databases, tasks and caller personas for the airline, retail and telecom domains, and that frozen, pinned benchmark manifests such asvoice-v2andtext-v1replace ad-hoc task selection. The release also adds anintakedomain for entity capture, a post-hoctau2 judgessuite that the notes say is diagnostic only, and 2.0 leaderboard submission packages. The notes state that 2.0 results are not comparable with 1.x results and point to thev1.0.1tag for comparable runs. USASI has not tested this release.Sierra open-sources Hyper-τ-bench, an evaluation of models that build customer-service agents
On September 8, 2026 Sierra published Hyper-τ-bench, a long-horizon evaluation that measures whether a model can build a customer-service agent rather than only act as one. A developer agent works in a sandboxed workspace with a simulated business's records and a simulated client it can message, must recover the requirements and turn the business's actions into tools, and the finished agent is then tested on held-out tasks the developer never saw. Sierra says it is open-sourcing the benchmark, with code in the sierra-research/hyper-tau-bench repository, a public leaderboard, and a paper on arXiv; the post does not state a license. USASI has not run the benchmark.
What this catalog does not know
- Founding date: not documented in the sources reviewed.
Have a primary source? How to report a correction.
U.S. eligibility
Eligible · basis: U.S. headquarters
Sierra's modern slavery statement (last updated February 4, 2026) states that Sierra Technologies, Inc. is a Delaware corporation headquartered in San Francisco, California. Its careers page also describes the company as headquartered in San Francisco, and its website terms give an address at 150 Sutter St, San Francisco.132
Sources
This listing is not an endorsement or a federal approval.
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APA style
USASI. (2026, October 1). Sierra. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/companies/sierra/
BibTeX
@misc{usasi_sierra,
author = {{USASI}},
title = {Sierra},
year = {2026},
month = oct,
howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/companies/sierra/}},
note = {United States of America Superintelligence. Last updated 2026-10-01}
}The date is when this page was last updated. Add the date you read it if your style needs one.
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