The closest alternatives to Sierra are Forethought, Replicant and Yellow.ai. Sierra generates $200M in revenue with 700 employees. Every one of the 9 alternatives below is compared with Sierra on revenue, funding, customers, team size and founding year.
Sierra is pinned as the first column so every figure is read against it. Blank cells are figures we have not verified, never zeros.
| Company |  SierraThis company |  Forethought |  Replicant |  Yellow.ai |  Intercom |  Ada |  Cognigy |  Quiq |  Decagon |  PolyAI |
|---|---|---|---|---|---|---|---|---|---|---|
| Revenue | $200M | $15.7M | $24.2M | $79.5M | $400M | $70.6M | $37M | $20M | $5.2M | $35M |
| Valuation | $15.8B | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed |
| Funding raised | $1.6B | $92M | $34M | $102.2M | $241.9M | $192.2M | $54.8M | $44M | Not disclosed | Not disclosed |
| Customers | Not disclosed | Not disclosed | 20 | 1K | 30K | 5K | 1K | Not disclosed | Not disclosed | Not disclosed |
| Team size | 700 | 106 | 209 | 1K | 1.5K | 558 | 221 | 98 | 47 | 248 |
| Growth | 100% | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed | Not disclosed |
| Founded | 2023 | 2017 | 2017 | 2016 | 2011 | 2016 | 2016 | 2015 | Not disclosed | 2023 |
| HQ | San Francisco, United States | United States | United States | United States | United States | Canada | Germany | United States | United States | United Kingdom |
United States · Conversational Intelligence Software
Forethought.ai is an AI-powered customer service platform that uses natural language processing and machine learning to help customer support teams provide faster and more accurate responses to customer inquiries.
United States · Conversational Intelligence Software
Yellow.ai is an enterprise-grade conversational AI platform founded in 2016 and headquartered in Bangalore, India. The company builds Dynamic AI Agents that automate customer service and employee engagement interactions…
United States · Conversational Intelligence Software
A platform to provide a seamless customer experience across AI and human support, delivering increased customer satisfaction while reducing costs.
Canada · Conversational Intelligence Software
Ada's AI-powered platform enables enterprise businesses around the world to automate an incredible customer experience that saves time, reduces cost, and strengthens support. Our industry-leading clients like Telus…
Germany · Conversational Intelligence Software
Cognigy is the leading Enterprise Conversational AI Platform for customer & employee support process automation.
United States · Conversational Intelligence Software
Provider of a cloud-based messaging platform intended to connect customers with enterprises. The company's platform allows consumers to talk and interact with their favorite brands by letting them text or message agents…
United States · Conversational Intelligence Software
Decagon is a leading innovator in AI-powered customer support agents for enterprises. Their platform automates customer interactions, resolves routine queries, and enhances support operations using advanced AI models…
United Kingdom · Conversational Intelligence Software
The leading provider of enterprise AI agents for customer service.
Sierra ranks #12 of 2,679 Conversational Intelligence Software companies by annual revenue, putting it in the top 1% of the market.
| Date | Round | Amount | Valuation |
|---|---|---|---|
| May 2026 | Series E | $950M | $15.8B |
| May 2026 | Funding round | Not disclosed | $15.8B |
| Sep 2025 | Series C | $350M | $10B |
| Oct 2024 | Series B | $175M | $4.5B |
| Feb 2024 | Seed | $110M | $1B |
The closest alternatives to Sierra are Forethought, Replicant and Yellow.ai. This page compares each of them with Sierra on revenue, funding, customers and team size.
Forethought is the closest alternative to Sierra, generating $15.7M in revenue. Which alternative fits best depends on budget and company size, so compare all 9 alternatives above before choosing.
Sierra generates $200M in revenue.
Sierra has raised $1.6B in funding.
Yes. Sierra generates $200M in revenue versus $15.7M at Forethought.
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