{
  "name": "Sierra",
  "slug": "sierra",
  "country": "US",
  "founded": 2023,
  "description": "Conversational AI agents for enterprise.",
  "lastRound": "Series E",
  "lastRoundDate": "2026-05-04",
  "valuation": 15800000000,
  "totalRaised": 1500000000,
  "monthsBetweenRaises": 9,
  "revenueARR": 200000000,
  "employees": 500,
  "employeesChange": 60,
  "revPerEmployee": 400000,
  "investorTier": 1,
  "repeatFounder": true,
  "curationLists": [],
  "momentum": 78,
  "momentumBreakdown": {
    "funding": 28,
    "hiring": 22,
    "backers": 20,
    "curation": 0,
    "heat": 8
  },
  "confidence": "reported",
  "playbookUrl": "https://www.startupriders.com/p/sierra-growth-playbook",
  "sources": [
    {
      "label": "Startup Riders - Sierra Growth Playbook",
      "url": "https://www.startupriders.com/p/sierra-growth-playbook"
    },
    {
      "label": "Sierra - announced $200M ARR (June 2026)",
      "url": "https://sierra.ai"
    },
    {
      "label": "CNBC - $950M Series E at $15.8B (May 2026)",
      "url": "https://www.cnbc.com/2026/05/04/bret-taylor-sierra-fundraise-openai.html"
    }
  ],
  "investors": [
    "Sequoia",
    "Benchmark",
    "Greenoaks"
  ],
  "careersUrl": "https://sierra.ai/careers",
  "openRoles": 35,
  "openRolesChange": 5,
  "rankChange": 3,
  "verifiedDate": "2026-06-21",
  "newEntry": false,
  "socialFollowers": null,
  "socialFollowersChange": null,
  "arrHistory": [
    {
      "date": "2024-10",
      "value": 20000000
    },
    {
      "date": "2025-11",
      "value": 100000000
    },
    {
      "date": "2026-01",
      "value": 150000000
    },
    {
      "date": "2026-06",
      "value": 200000000
    }
  ],
  "changelog": [
    {
      "date": "2026-06-15",
      "tag": "metric",
      "summary": "ARR crossed $200M — added the second $100M in just two quarters",
      "source": {
        "label": "GetLatka",
        "url": "https://getlatka.com/companies/sierra"
      }
    },
    {
      "date": "2026-05-04",
      "tag": "funding",
      "summary": "Raised $950M Series E at a $15.8B valuation, led by Tiger Global and GV",
      "source": {
        "label": "CNBC",
        "url": "https://www.cnbc.com/2026/05/04/bret-taylor-sierra-fundraise-openai.html"
      }
    },
    {
      "date": "2026-03-25",
      "tag": "product",
      "summary": "Launched Ghostwriter — an AI that builds AI agents from plain English",
      "source": {
        "label": "Sacra",
        "url": "https://sacra.com/c/sierra/"
      }
    },
    {
      "date": "2026-03-01",
      "tag": "expansion",
      "summary": "Acquired Fragment (Paris AI-ops) and opened a Sydney office",
      "source": {
        "label": "Sacra",
        "url": "https://sacra.com/c/sierra/"
      }
    },
    {
      "date": "2026-06-21",
      "tag": "news",
      "summary": "Added to the Class of 2026",
      "source": {
        "label": "Startup Riders",
        "url": "https://www.startupriders.com/p/sierra-growth-playbook"
      }
    }
  ]
}