Cresta vs Sierra

Conversational research tool: poses natural-language questions over customer interaction data and returns evidence-grounded charts, comparisons and written answers.

Automated 24/7 phone-answering system for small businesses that captures leads, books/reschedules appointments, answers questions and routes calls.

A supervision surface for a contact centre running both people and AI agents, giving real-time oversight and guidance across the two.

Identifies which customer conversations are automation candidates, assigns a readiness score by volume/complexity/resolution rate, and exports discovered flows into Cresta's AI Agent Builder.

Real-time AI that listens to live contact-center conversations and surfaces behavioral coaching, source-backed answers and after-call summaries directly inside an agent's existing tools.

Analyzes 100% of customer conversations across human and AI agents to surface behavioral drivers of CSAT, handle time and revenue, combining Cresta Insights, Quality Management and Coach.

The no-code AI workflow engine that powers every Cresta product ('Opera GenAI Intents, Opera Workflows, Opera Analyzer'), letting contact-center teams configure and continuously optimize AI without writing code.

Continuously listens during customer interactions and surfaces precise answers in real time, grounded in conversation and on-screen context (account status, order history), guiding agents through complex workflows.

Analyzes conversation data to generate realistic customer personas, ranked by traffic volume and traced to source conversations, for AI-agent testing, human-agent training and voice-of-customer simulation.

Lets contact-center agents practice against AI-simulated customers built from real conversations, for onboarding, continuous skill development and targeted coaching.

Cresta's autonomous contact-centre agent, handling customer conversations end to end rather than coaching a human through them.

Empower customer experience teams to build and manage agents—without writing a line of code. Set up customer journeys, configure knowledge, and define brand guidelines effortlessly.

Create consistent experiences across voice, chat, email, and more in 58 languages, available 24/7/365.

Ask any question in natural language, and Explorer will use analytics and sample customer conversations to provide answers and actionable recommendations.

Build or modify your agent simply by describing how you want your agent to behave. Prompt workflows, systems integrations, guardrails, tone, and style.

Long-horizon agents that get more intelligent with every interaction.

Measure what matters, test what works, and understand every agent decision with analytics, experimentation, and observability built for continuous improvement.

Platform for building and running customer-facing agents that handle support conversations over chat and voice.