by Decagon AI · founded 2023 · updated Jul 2026
Decagon builds enterprise AI customer support agents around Agent Operating Procedures (AOPs), agent logic written in plain English by CX teams themselves. After an engineering-led setup, business users own the workflows, making it the control-oriented counterpart to Sierra's managed model.
Fixed weights, sources attached, the formula
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| Claim | Source | Checked |
|---|---|---|
| Valued at ~$4.5B within two years of launch· re-check | Funding press coverage | Feb 2026 |
| Agent Operating Procedures let CX teams write agent logic in plain English | Product documentation & press | Jan 2026 |
| Founded 2023 by Jesse Zhang and Ashwin Sreenivas· re-check | Company announcements | Jan 2025 |
Sierra's Series E (led by GV and Tiger Global) pushes total funding past $1.5B on ~$200M ARR. Its agents now run revenue-cycle workflows between providers and payers and process insurance claims. Healthcare collections and RCM buyers should have it on the list.
New governance products operationalize real-time TCPA, DNC and TSR compliance across collections and regulated outreach, a response to AI voice agents scaling in debt recovery. If you run AI collections calls, a documented consent-and-suppression control layer is now table stakes.
Industry analyses put AI-handled calls at $0.30–0.50 versus $17+ for human contacts, a ~35x gap. Autonomous handling (Sierra, Decagon, Retell) now competes head-on with assist-layer incumbents.
The two enterprise AI-agent leaders reached $4.5B valuations within two years of launch. Sierra sells managed 'Agent OS' deployments; Decagon bets on CX teams programming agents in plain English.
Intercom
The most widely deployed AI agent for customer service.
Sierra AI
The enterprise Agent OS for customer experience, from Bret Taylor's team.
Retell AI
Production voice AI agents in days, priced per minute.