Hopper
Hopper is a YC Fall 2026 (F26) company. Based in San Francisco, CA, USA. Team of 2.
About Hopper
Summary
Hopper builds a specialized inference platform for voice AI, serving companies that run speech-to-text, text-to-speech, and speech language models in production. It fine-tunes those models on a customer's own call traffic and continuously improves them against live usage, replacing generic hosted model APIs. The result is lower latency and lower cost per token than general-purpose alternatives.
Business model
$0.50 per one million input tokens
Go-to-market
B2B teams building voice agents start via a self-serve onboarding flow or by talking directly to an engineer.
From the Y Combinator listing
Inference and post-training for realtime agents
Hopper trains open-weight models on your production traces, then serves and improves them against your live traffic.
Facts
- B2B / B2B -> Infrastructure
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
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