Alternatives
Products that do what Sigma Voice does
Phone trees + compliant voice alerts for teams
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Get your whole team (humans and agents!) on speed dial
Jun 2026 · getcarbon.app
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Hi, HN, we’re building Mia & Leo: AI personalities backed by purpose-built duplex speech models for revenue calls. Teams building real-world agents told us that more than 40% of callers hang up within the first 30 seconds. On a revenue call, that meant a lost booking, an unpaid balance, a cold lead, or a customer who does not come back. This happens because humans interrupt, correct dates, pause halfway through a sentence, or speak over someone in the background. The agent misses it, talks over them, or loses the thread. That’s because of how the current voice systems work. They sequentially…
Jul 2026 · metavoice.io
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