Dust vs Sierra Comparison
Compare Dust vs Sierra features, pricing, and more.
Last updated: November 2026
Dust
6.9/10
Dust is a Paris-founded platform where companies build custom AI agents that work on their internal data across tools like Slack, Notion and GitHub.
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 | 6.9/10 | 7.4/10 |
| Integration | 7/10 | 8/10 |
| Analytics | 6/10 | 8/10 |
| Customization | 8/10 | 9/10 |
| Ease of Use | 7/10 | 7/10 |
| Support | 6/10 | 8/10 |
| Cost | 6/10 | 2/10 |
| Scalability | 7/10 | 9/10 |
| Security | 8/10 | 9/10 |
| Output Quality | 7/10 | 9/10 |
| Pricing | ||
| Free plan | Yes | No |
| Cheapest paid plan | €30/user/mo Business - Pro seat | Contact for pricing |
| Estimated cost for 10 users | €300/mo Business - Pro seat | Contact for pricing |
| Features | ||
| AI Agents | ||
| Chatbots | ||
| Enterprise Controls | ||
| Knowledge Base Search | ||
| Text Generation | ||
| Workflow Automation | ||
| API Access | Not listed | |
| Private Deployment | Not listed | |
| Voice and Audio | Not listed | |
Dust vs Sierra cost by team size
| Team size | Dust | Sierra |
|---|---|---|
| 1 user | €30/moBusiness - Pro seat | Contact for pricing |
| 5 users | €150/moBusiness - Pro seat | Contact for pricing |
| 10 users | €300/moBusiness - Pro seat | Contact for pricing |
| 25 users | €750/moBusiness - Pro seat | Contact for pricing |
| 50 users | €1,500/moBusiness - Pro seat | 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 Dust
- Has a free plan (Sierra does not)
- Higher Cost score (6/10 vs 2/10)
- Better fit for small business (7/10 vs 1/10)
- Better fit for mid-market (9/10 vs 5/10)
Why choose Sierra
- Higher Analytics score (8/10 vs 6/10)
- Higher Support score (8/10 vs 6/10)
- Better fit for customer support teams (10/10 vs 5/10)
- Better fit for enterprise (10/10 vs 8/10)
Pros & Cons
Dust
Pros
- Model-agnostic: more than 20 models from OpenAI, Anthropic, Google, Mistral and DeepSeek, with none locked behind a higher plan.
- Agents inherit permissions from connected sources, which reduces the risk of leaking data.
- SOC 2 Type II and a choice of US or EU data residency, with single-tenant deployment on Enterprise.
- G2 reviewers rate it highly, with 22 reviews averaging 4.9 out of 5, and say non-technical staff can build agents.
- Monthly seats can be cancelled anytime, and seat types can be changed per user.
Cons
- The Business plan is capped at 3 connectors, 5 MCP servers and 5 Spaces.
- Agent answers are only as good as the structure and freshness of the connected data.
- Its native integration catalogue is smaller than Microsoft Copilot's or Glean's, and some G2 reviewers ask for more integrations.
- Credits that run out need admin-approved overage, and unused credits do not roll over.
- Business customers get email support only.
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 6.9/10 for Dust. The largest gap is in Cost: 6/10 for Dust and 2/10 for Sierra.
Dust has a free plan; Sierra does not list one.
Dust is the better fit for small business: we rate it 7/10 for them, against 1/10 for Sierra.
