Sierra
by Sierra Technologies, Inc.
Sierra is an enterprise customer-service platform for building AI agents that interact with customers across channels, connect to business systems, follow company policies, and complete service tasks.
Why Abandoned
Sierra continues to operate its official website and announced a $350 million Series B financing in October 2024 to expand its enterprise AI-agent platform.
🩺 Health Signals
- HTTP Status
- 200
- Response
- —
- SSL
- —
- Confidence
- 96%
- Domain expires
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- Last content change
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- Last tweet
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- API status
- —
📅 Timeline
Sierra publicly launches
Bret Taylor and Clay Bavor introduced Sierra and its conversational AI-agent platform for customer experience; Reuters reported that the company launched with $110 million in funding.
Initial funding disclosed
Reuters reported that Sierra had raised $110 million from Benchmark and Sequoia Capital at launch.
Sierra raises $175 million
Sierra announced a $175 million financing led by Greenoaks, valuing the company at $4.5 billion.
Sierra raises $350 million Series B
Sierra announced a $350 million Series B led by Greenoaks, with participation from ICONIQ and existing investors, at a reported $10 billion valuation.
🔄 Alternatives to Sierra
Botpress
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Cohere
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Dify
🟢ActiveDify is an open-source platform for building, testing, deploying, and monitoring generative AI applications and agents. It provides visual workflows, model-provider integrations, retrieval pipelines, prompt tools, APIs, and observability.
Lindy
🟢ActiveLindy is a no-code platform for creating AI agents, called Lindies, that can perform business workflows across email, meetings, customer support, sales, and connected applications.
🪦 Other dead AI Agents tools
Sweep
🟠Possibly DeadSweep was an AI coding agent that converted GitHub issues and bug reports into proposed code changes and pull requests. Its original product was later discontinued as the team shifted to an AI-assisted JetBrains coding plugin.
Ultimate
🟡Acquired / MergedUltimate was a customer-support automation platform that used conversational AI to resolve requests across chat, email, and social channels. Zendesk acquired the company in 2024 and integrated its technology into Zendesk AI.
Hyperlight
🟡Acquired / MergedHyperlight was an AI-agent startup focused on automating customer-service workflows for businesses. Public reporting indicates that the company was acquired by Cresta in 2024 to strengthen Cresta's AI capabilities.
Sana Agents
🟡Acquired / MergedSana Agents is an enterprise AI agent platform from Sana Labs for creating and deploying agents that work with organizational knowledge, connect to business systems, and automate research, analysis, and recurring workflows.
❓ Frequently Asked Questions
What is Sierra AI?
Sierra is an enterprise platform for creating customer-facing AI agents. Its agents can converse with customers, use connected business systems, apply company policies, and take actions such as resolving service requests.
Who founded Sierra AI?
Sierra was co-founded by Bret Taylor, former co-CEO of Salesforce and board chair of OpenAI, and Clay Bavor, a former Google executive.
When did Sierra AI launch?
Sierra publicly launched on February 13, 2024, alongside reporting that it had raised $110 million from Benchmark and Sequoia Capital.
What can Sierra AI agents do?
Sierra agents are designed to handle customer-service conversations across channels, connect with enterprise data and workflows, follow configurable policies, and complete actions rather than only answer questions.
Is Sierra AI still active?
Yes. Sierra maintains an active company website and has continued announcing product development and financing. Its latest clearly sourced major financing announcement was a $350 million Series B in September 2025.