Voice AI for the hard use cases.
If you're looking to improve performance and reduce costs for your production calls, we're here to help. Our team includes Stanford AI Lab and Y Combinator alumni, and we've been building in voice AI since 2024. We'd be glad to make ThunderPhone do what you need it to do.
We deliver the outcome, not just the tools.
We'll be with you every step of the way, from scoping the project to measuring the results.
Scope
We map your use case, integrations, compliance needs, etc.
Build
Custom call flows, routing, and integrations on top of ThunderPhone.
Test
Evaluate against real call scenarios before going live.
Launch
Go to production with monitoring and A/B tests.
Tune
Ongoing optimization of models, routing, and cost as you scale.
Special use cases.
Because ThunderPhone owns the full call loop, optimization isn't limited to one modular component — we can add fine-tuning, custom guardrails, lower-cost routing, and specialized integrations. Reach out to learn more.
ThunderSocket
Use ThunderSocket to connect your own model while ThunderPhone handles telephony, speech, turn-taking, testing, and production call operations. We can also support audio-to-audio integration.
ThunderHuman
Cold outbound that stays TCPA-compliant: vetted human agents handle each call, saying only what the AI tells them to say. Just as easy to set up and change prompts/integrations as ThunderPhone, but fully TCPA compliant.
Flux Interpreting
Over-the-phone interpreting (OPI) built for language service providers — powered by ThunderPhone AI. Interpret between any two languages ThunderPhone supports.
See a live demoCustom prices for high volumes.
For some high-volume use cases — outbound with long hold times, voicemail, screeners — we can optimize pricing down to a penny a minute or less.
Because we own telephony, speech, and reasoning end to end, optimization isn't capped by one vendor's margin — and we pass the savings through.
Compliance, residency, SLAs — when you need them.
HIPAA and GDPR are ready out of the box. For larger deployments, we scope the security, legal, and operating package around your requirements.
Start from a production stack,
not a blank slate.
Tell us about your use case, volume, and compliance needs.