NiCE CXone Mpower vs Sierra: Complete Comparison (2026)
An in-depth comparison of NiCE CXone Mpower and Sierra to help you choose the right tool for your business.
Last updated: November 2026
NiCE CXone Mpower
6.5/10
NiCE CXone Mpower is a cloud contact center platform for mid-size and large enterprise customer service operations. It combines omnichannel routing, workforce management, AI agents and copilots.
Sierra
7.4/10
Sierra is an enterprise conversational AI platform that builds and runs customer service agents across chat, voice, SMS, WhatsApp and email.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 6.5/10 | 7.4/10 |
| Integration | 7/10 | 8/10 |
| Analytics | 8/10 | 8/10 |
| Customization | 8/10 | 9/10 |
| Ease of Use | 5/10 | 7/10 |
| Support | 5/10 | 8/10 |
| Cost | 3/10 | 2/10 |
| Scalability | 9/10 | 9/10 |
| Security | 9/10 | 9/10 |
| Output Quality | 7/10 | 9/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | $110/user/mo Omnichannel Suite | Contact for pricing |
| Estimated cost for 10 users | $1,100/mo Omnichannel Suite | Contact for pricing |
| Features | ||
| AI Agents | ||
| Chatbots | ||
| Knowledge Base Search | ||
| Text Generation | ||
| Workflow Automation | ||
| API Access | Not listed | |
| Data Analysis | Not listed | |
| Enterprise Controls | Not listed | |
| Voice and Audio | Not listed | |
NiCE CXone Mpower vs Sierra cost by team size
| Team size | NiCE CXone Mpower | Sierra |
|---|---|---|
| 1 user | $110/moOmnichannel Suite | Contact for pricing |
| 5 users | $550/moOmnichannel Suite | Contact for pricing |
| 10 users | $1,100/moOmnichannel Suite | Contact for pricing |
| 25 users | $2,750/moOmnichannel Suite | Contact for pricing |
| 50 users | $5,500/moOmnichannel Suite | Contact for pricing |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose NiCE CXone Mpower
- Higher Cost score (3/10 vs 2/10)
- Better fit for government (7/10 vs 4/10)
- Better fit for healthcare (7/10 vs 5/10)
Why choose Sierra
- Higher Support score (8/10 vs 5/10)
- Higher Ease of Use score (7/10 vs 5/10)
Pros & Cons
NiCE CXone Mpower
Pros
- NiCE publishes per-agent prices for every suite, which is uncommon among enterprise contact center vendors.
- A single vendor covers routing, workforce management, quality management, analytics and AI agents.
- NiCE reports FedRAMP Moderate authorization since 2018, along with PCI DSS and HIPAA support, which suits regulated buyers.
- Copilot for Agents writes live summaries and email drafts and pulls answers from the knowledge base during interactions.
- NiCE is building Cognigy's agentic AI into CXone, following its 955-million-dollar acquisition of the company, announced in July 2025.
Cons
- Most of the advanced AI is only in the 249-dollar Ultimate tier.
- Per-session charges are easy to underestimate when budgeting.
- Reviewers on Capterra and PeerSpot say integrations with internal and third-party systems are hard to set up.
- Users report gaps in documentation, a dated interface and slow support on complex issues.
- Some users report delays in syncing real-time dashboards.
Sierra
Pros
- Outcome-based billing means customers usually pay only for resolved conversations or other agreed results, not for each seat.
- Three build options cover both CX teams and engineers: the no-code Agent Studio, the code-first Agent SDK, and Ghostwriter for building agents from SOPs.
- One agent runs across chat, voice, SMS, WhatsApp, email and ChatGPT, keeping context between channels.
- Its list of compliance attestations is broad, covering SOC 2, ISO 27001, ISO 42001, HIPAA, PCI DSS and FedRAMP.
- It has a strong roster of enterprise customers, including SiriusXM, ADT, Rocket Mortgage and SoFi.
Cons
- There is no public pricing, and competitor estimates put annual contracts at about $150,000 or more.
- There is no self-serve or trial tier, so small teams cannot try it on their own.
- Implementation is largely vendor-led, which can make customers depend on Sierra's team for changes.
- There are few public reviews (7 on Gartner Peer Insights) to verify claims against.
- Some reviewers say voice quality still falls short of human level, and that complex telephony setups depend on how far the integration goes.
Not sold on either?
Frequently Asked Questions
Sierra scores higher on our AI Software criteria: 7.4/10 against 6.5/10 for NiCE CXone Mpower. The largest gap is in Support: 5/10 for NiCE CXone Mpower and 8/10 for Sierra.
No, neither NiCE CXone Mpower nor Sierra lists a free plan.
NiCE CXone Mpower is the better fit for government: we rate it 7/10 for them, against 4/10 for Sierra.
