Pricing
Not listed
Official monthly price not confirmed
- API
- Not confirmed
Voice · Vendor site 2026-10-04
Hopper builds fast inference for voice agents by training and serving custom STT, TTS, and speech LLMs on a customer’s production calls. The company compares its models on latency and token cost versus general-purpose LLMs and offers engineering-led onboarding for voice stacks.
Teams running production voice agents who need low-latency speech models tuned on their own call traffic.
Homepage highlights benchmarked latency and token pricing but does not publish named monthly subscription plans.
Hopper trains and serves speech models on your production calls to cut voice-agent latency and inference cost compared with general LLM stacks.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Models | Site markets custom STT, TTS, and speech LLMs trained on production calls and served against live traffic. | Facts sourced | 2026-10-04 |
| Performance | Homepage cites about 80 ms time to first token versus 600 ms for GPT-4.1 in its comparison block. | Facts sourced | 2026-10-04 |
| Onboarding | Primary calls to action are Get started and Talk to an Engineer rather than self-serve checkout. | Facts sourced | 2026-10-04 |
Understand the total cost
Pricing
Not listed
Official monthly price not confirmed
Altered provides professional AI voice changing software for real-time calls and post-production workflows. Altered Studio focuses on speech-to-speech voice morphing, cloning, and editing, while Real-Time Pro targets gamers, call centers, and voice restoration use cases.
Explore toolRoark is a voice-AI QA and evaluation platform for teams running production voice agents. It simulates hundreds of caller scenarios before launch, scores live calls on audio-native metrics, supports human review, and documents fixes so teams can ship voice agents with evidence.
Explore toolai-coustics provides real-time audio intelligence SDKs that clean speech, remove background voices, and score audio quality for voice-AI pipelines. Voice Focus and related models target sub-30ms enhancement for production voice agents, with minute-based SaaS plans and enterprise SLAs.
Explore toolThe practical questions
Hopper builds fast inference for voice agents by training and serving custom STT, TTS, and speech LLMs on a customer’s production calls. The company compares its models on latency and token cost versus general-purpose LLMs and offers engineering-led onboarding for voice stacks.
Not confirmed. This record does not confirm an ongoing free plan.
A listed monthly price has not been confirmed. See the plan cards for entitlements, billing commitments and seat minimums.
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
Homepage highlights benchmarked latency and token pricing but does not publish named monthly subscription plans.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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