AI Voice Agent Platform

Sierra

Enterprise AI agent platform for customer service — voice, chat, and email with outcome-based pricing

sierra.ai Verified April 2026 New York, US Founded 2023 series b

Pricing

Contact sales for pricing

Outcome-based pricing — you pay per successful resolution, not per seat or minute. No public rate card. Industry estimates: $150K+ annually to start; enterprise deployments commonly $200K–$350K+ in Year 1 including implementation. Contact sales only.

Custom enterprise

Capabilities

Capability Sierra
Transcription
Summarization
Sentiment Analysis
Real-Time Agent Assist
Autonomous Voice Agent
Virtual Agent (Chat)
Conversation Intelligence
Automated QA
Intelligent Routing
Predictive Dialer
Voice Cloning
Multilingual
Coaching Workflows
Workforce Management

Compliance & Security

Integrations

CRM

salesforcehubspotmsdynamics

Helpdesk

zendesksalesforce service cloudservicenow

Other

SnowflakeDatabricksGoogle Cloud (BigQuery)AWS (S3, Redshift)Redis
API documented

Alternatives to Sierra