CloudTalk vs Sierra Comparison
Compare CloudTalk vs Sierra features, pricing, and more.
Last updated: November 2026
CloudTalk
7/10
Cloud phone and call center software with AI voice agents, conversation intelligence and CRM integrations for sales and support teams.
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 | 7/10 | 7.4/10 |
| Integration | 8/10 | 8/10 |
| Analytics | 7/10 | 8/10 |
| Customization | 7/10 | 9/10 |
| Ease of Use | 8/10 | 7/10 |
| Support | 6/10 | 8/10 |
| Cost | 6/10 | 2/10 |
| Scalability | 7/10 | 9/10 |
| Security | 6/10 | 9/10 |
| Output Quality | 7/10 | 9/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | €34/user/mo Starter | Contact for pricing |
| Estimated cost for 10 users | €340/mo Starter | Contact for pricing |
| Features | ||
| AI Agents | ||
| Voice and Audio | ||
| Workflow Automation | ||
| Transcription | Not listed | |
| API Access | Not listed | |
| Text Generation | ||
| Chatbots | Not listed | |
| Knowledge Base Search | Not listed | |
| Enterprise Controls | Not listed | |
Which One Should You Choose?
Why choose CloudTalk
- Higher Cost score (6/10 vs 2/10)
- Higher Ease of Use score (8/10 vs 7/10)
- Better fit for small business (8/10 vs 1/10)
- Better fit for startups (7/10 vs 3/10)
Why choose Sierra
- Higher Security score (9/10 vs 6/10)
- Higher Customization score (9/10 vs 7/10)
- Better fit for enterprise (10/10 vs 5/10)
Pros & Cons
CloudTalk
Pros
- Dialer range from click-to-call up to a 10-line parallel dialer suits high-volume outbound sales.
- More than 95 native CRM and helpdesk integrations, plus API, webhooks and an MCP server, from the Essential tier.
- Low entry price of 25 EUR per user annually, and a 14-day trial with no credit card.
- The AI Receptionist includes 50 minutes at no cost and handles inbound calls 24/7 in more than 70 languages.
- Reviewers frequently praise call quality and an intuitive interface (G2 4.4/5).
Cons
- Power dialer, parallel dialer, conversation intelligence and AI agents are paid add-ons, so the real seat cost climbs.
- The Starter plan has no integrations or API, and keeps recordings for only one month.
- Reviewers report occasional glitches, dropped calls and app bugs.
- Support response is inconsistent according to some reviewers.
- US and Canada customers pay an extra 11% compliance recovery fee, and no refunds are given for partial periods.
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.
