Milestones
- Company foundedAug 2023Complete.
- $250M Series D at $4.5B27 Jan 2026Complete.
- Duet Autopilot: agents that propose their own fixes9 Jun 2026Complete.
- Voice 3 and Chord, its own speech model1 Oct 2026Complete.
by DecagonUS
Replace hold queues with an AI concierge that solves most customer problems instantly in any channel and language, while the company keeps control of policy and tone.
Voice 3 and Chord speech model launched Oct 2026; self-improving Duet Autopilot since June.
Updated 10d agoChecked 11 Oct0 updates this week
Support teams describe each process, such as a refund, in plain language plus code for exact rules; the agent follows it.
Integrations let the agent look up orders, change bookings or issue refunds instead of only answering questions.
A quick conversational model listens and replies while a stronger model works on the request in parallel.
Autopilot finds failures, drafts fixes, tests them on a set of past chats and waits for human approval.
| Spec | Decagon agents |
|---|---|
| Channels | Chat, email, voice, SMSR (reported) |
| Voice languages | 70+R (reported) |
| Listeners who spotted the human | About 10% (blind test)R (reported) |
| New enterprise customers, past year | 100+ (to Jan 2026)R (reported) |
R reported by the company
Decagon
Customer service AI agents, voice agents
Decagon builds AI agents that answer customers by chat, email and phone and take actions like refunds, for companies such as Chime, Avis and Deutsche Telekom. Sierra's main rival.