SigmaMind AI is a leading enterprise-grade Voice AI platform currently handling ~90k calls/day with ultra-low latency and best-in-class scalable voice infra.
Known for its sub-800ms latency, SigmaMind enables natural, real-time conversations at scale. Its no-code agent builder allows business users to quickly create voice agents, while full APIs give developers deep customization and integration capabilities. SigmaMind accelerates deployment using industry-ready templates where agents live in minutes, provides analytics dashboards to monitor call volume, costs, terminations, and optimize AI agent performance, and has a vibrant developer community.
Recently a customer doing outbound calling in the wellness space came to SigmaMind and needed text-to-speech (TTS) with human-level realism, perfect pronunciation for their brand and products, and the capability to scale up immediately.
After evaluating multiple providers, SigmaMind recommended Rime because of its combination of voice quality, scalability, cost efficiency, and unmatched support.
Rime’s impact
“SigmaMind’s customers run tens of thousands of voice interactions every single day and what matters to them is consistency, clarity, and predictable cost at scale. Rime delivers all three.
The voices sound natural, the latency stays low even under heavy load, and the enterprise TTS pricing model makes it feasible for businesses to deploy voice AI not just as a demo, but as a true production-grade system.
For us at SigmaMind AI, Rime has become a trusted part of our stack, empowering our customers to build human-like voice experiences without worrying about infrastructure limits or runaway TTS bills. It’s the kind of reliability and balance you only appreciate when you’re operating at scale.”
Challenges Before Rime
SigmaMind AI and their customer faced numerous challenges before Rime:
Needed better control over voice speed, clarity, and tone
Difficulty fixing model pronunciation issues
Concerns around scaling as call volumes increased
Limited support, slow response, minimal guidance
High TTS costs with previous providers
Why SigmaMind Chose Rime
Predictable Enterprise Scaling
Rime’s models, built intentionally for high-volume use cases, handled SigmaMind’s rapid growth effortlessly. With 750k monthly calls (and rapidly growing), Rime ensured uptime, low latency, and consistent performance.
Voice Quality & Personalization
Rime’s TTS model provided best-in-class performance
Personalized voice cloning now in progress
Better pronunciation control than previous vendors
Exceptional Support
SigmaMind emphasized support as a critical differentiator. With Rime:
Sigmamind has a dedicated Slack channel with SLAs
Any issues get addressed insanely fast
Voice tuning and mispronunciation fixes are handled by Rime, not by SigmaMind engineers
Collaborative improvement of models and workflows
We are excited to continue partnering with SigmaMind and deliver more reliable, natural-sounding voices to our customers!
