Planview AdaptiveWork vs Sierra Comparison
Compare Planview AdaptiveWork vs Sierra features, pricing, and more.
Last updated: November 2026
Planview AdaptiveWork
6.6/10
Enterprise project and portfolio management platform, formerly Clarizen, for PMOs and professional services teams that need resource, financial and portfolio control.
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 | 6.6/10 | 7.4/10 |
| Integration | 8/10 | 8/10 |
| Analytics | 8/10 | 8/10 |
| Customization | 9/10 | 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 | 7/10 | 9/10 |
| Output Quality | Not listed | 9/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | Contact for pricing | Contact for pricing |
| Estimated cost for 10 users | Contact for pricing | Contact for pricing |
| Features | ||
| AI Agents | Not listed | |
| Chatbots | Not listed | |
| Enterprise Controls | Not listed | |
| Knowledge Base Search | Not listed | |
| Text Generation | Not listed | |
| Voice and Audio | Not listed | |
| Workflow Automation | Not listed | |
| More features | ||
| File sharing | Not listed | |
| Client collaboration | Not listed | |
| App integrations | Not listed | |
| Task lists | Not listed | |
| Gantt charts | Not listed | |
| Timeline view | Not listed | |
| Task management | Not listed | |
| Time tracking | Not listed | |
| Workflow automation | Not listed | |
| Dashboards | Not listed | |
| Kanban boards | Not listed | |
| Collaboration tools | Not listed | |
| Reporting | Not listed | |
| Goals and OKRs | Not listed | |
Which One Should You Choose?
Why choose Planview AdaptiveWork
- Higher Cost score (3/10 vs 2/10)
- Better fit for small business (3/10 vs 1/10)
Why choose Sierra
- Higher Support score (8/10 vs 5/10)
- Higher Ease of Use score (7/10 vs 5/10)
- Better fit for customer support teams (10/10 vs 2/10)
Pros & Cons
Planview AdaptiveWork
Pros
- Deep customization, including custom objects and fields, dependent picklists and custom workflow actions.
- Reviewers single out reporting as a strength, and Slide Publisher automates PowerPoint status decks.
- Professional services financials, including rate cards, billable time, utilization and revenue forecasting, are built in.
- An External Collaborator portal gives clients access to projects, files and requests.
- It has a broad set of enterprise connectors, including Jira, Salesforce, ServiceNow, SAP and Microsoft Teams.
Cons
- No public pricing, and reviewers frequently call it expensive compared with similar tools.
- There is a steep learning curve, and some users find it overwhelming at first.
- Heavy customization can slow performance, especially over a VPN.
- Reviewers report mixed support, with slower resolution of complex issues.
- There is no separate development environment for testing workflows against live data.
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 6.6/10 for Planview AdaptiveWork. The largest gap is in Support: 5/10 for Planview AdaptiveWork and 8/10 for Sierra.
No, neither Planview AdaptiveWork nor Sierra lists a free plan.
Sierra is the better fit for customer support teams: we rate it 10/10 for them, against 2/10 for Planview AdaptiveWork.
