Lead Qualification
Instantly screen inbound contacts, confirm match criteria, and log results.
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Harmony.ai vs Cresta: managed voice AI for revenue qualification, live in days.
Harmony.ai is a managed voice AI platform for teams handling 500+ calls a month. White-glove implementation, live in days, every call transcribed and scored. Our own models, built for the phone.
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Harmony.ai vs Cresta
 | Cresta | |
|---|---|---|
| Platform | ||
| Built for | Revenue teams: AI receptionist, AI SDR, scheduling | Enterprise contact-center AI for Fortune 1000 service and sales teams: agent assist, conversation intelligence and autonomous AI Agents; 50 to 100+ agents (published) |
| Model | Our own models, built for the phone | LLMs orchestrated through Cresta Opera; model providers not named on cresta.com |
| Sounds human | Our own conversation models handle interruptions, timing and tone, so calls feel human | Multilingual voice and digital with real-time translation (published); voice providers not named |
| Implementation | White-glove | Customer builds, tests and governs agents in Opera (no-code); runs on your existing CCaaS (published) |
| Calling & scale | ||
| Latency | Sub-200ms median response | Not published |
| Concurrency | 1 to 10,000 parallel calls | Not published |
| Telephony | Built-in telephony or bring your own trunks; buy, assign and retire numbers across regions from one inventory; port or forward | Runs on your CCaaS: NICE CXone, Genesys Cloud, Five9, Amazon Connect, Twilio (published); no numbers sold |
| Spam remediation | Number-reputation monitoring, automatic quarantine of flagged numbers, remediation, branded caller ID and local presence | Not published |
| IVR, screeners and gatekeepers | Navigates external phone trees, hold queues and human gatekeepers to reach the right party; DTMF both ways; voicemail detection and retry | Inbound service and sales conversations; outbound not documented on cresta.com |
| Insight & improvement | ||
| Reporting | Funnel, call-flow and conversation analytics on 100% of calls; ask for a report in plain language and get it built on the spot | Conversation Intelligence: analytics, quality management and coaching on every conversation (published) |
| Self-improvement | Reasoning trace on every call, simulate changes on past calls, agent proposes knowledge-base updates you approve | Automated testing and guardrails built in; changes configured in Opera (published) |
| Experimentation | A/B live or synthetic traffic, publish the winner, roll back; agent keeps what converts across a campaign | Not published |
| Pricing & compliance | ||
| Pricing | Plans start at $3K/month | Custom, scoped by products, agent count, conversation volume, channels and languages; no self-serve tier (published) |
| Compliance | SOC 2 Type II, HIPAA, GDPR, ISO 27001 | ISO 42001, SOC 2 Type 2, HIPAA, GDPR, PCI DSS, ISO 27701 (published) |
Cresta figures from cresta.com (home, LLM information and trust pages), checked 12 Oct 2026. Cresta is a trademark of its owner. Harmony.ai is not affiliated with Cresta.
Hear it for yourself.
Three scenarios. One AI agent under pressure.
The interruption test
The caller changes their mind mid-sentence. The agent keeps up, no reset.
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The edge case
An off-script question gets a controlled answer, then straight back to the flow.
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The handoff
When it's genuinely human territory, the agent transfers warm, with a summary.
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Proactive Sales Use Cases
Our agents integrate with your CRM to handle operations across the entire customer lifecycle.
Hear it on your own use case.
Four quick questions, then we’ll configure an agent on your use case and let you listen before you commit to anything.
Why teams choose Harmony.ai over Cresta
Built for revenue, not a toolkit
Inbound and outbound on one platform. The agent dials, qualifies, and books meetings in your CRM.
Implementation is included
White-glove setup, live in days. No engineering project to stand up telephony, models, and workflows.
Every call becomes data
Every call transcribed and scored. Warm transfers with context, PII redaction, TCPA and DNC aware.
Scale without a quota request
1 to 10,000 parallel calls. Sub-200ms median response at any volume.
Meet Siena, your AI assistant
Enterprise-grade security
Enterprise-grade AI infrastructure with built-in protection and security, data privacy, governance, permissions, and compliance.
