Front vs Sierra: Complete Comparison (2026)
An in-depth comparison of Front and Sierra to help you choose the right tool for your business.
Last updated: November 2026
Front
6.5/10
Front is a customer service platform that combines shared inbox ticketing with AI agents, reply drafting, and quality analytics for 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 | 6.5/10 | 7.4/10 |
| Analytics | 7/10 | 8/10 |
| Cost | 4/10 | 2/10 |
| Customization | 7/10 | 9/10 |
| Ease of Use | 8/10 | 7/10 |
| Integration | 7/10 | 8/10 |
| Output Quality | 6/10 | 9/10 |
| Scalability | 7/10 | 9/10 |
| Security | 7/10 | 9/10 |
| Support | 6/10 | 8/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | $25/user/mo Starter | Contact for pricing |
| Estimated cost for 10 users | $250/mo Starter | Contact for pricing |
| Features | ||
| AI Agents | ||
| Chatbots | ||
| Enterprise Controls | ||
| Knowledge Base Search | ||
| Text Generation | ||
| Workflow Automation | ||
| API Access | Not listed | |
| Data Analysis | Not listed | |
| Voice and Audio | Not listed | |
Front vs Sierra cost by team size
| Team size | Front | Sierra |
|---|---|---|
| 1 user | $25/moStarter | Contact for pricing |
| 5 users | $125/moStarter | Contact for pricing |
| 10 users | $250/moStarter | Contact for pricing |
| 25 users | $1,625/moProfessional | Contact for pricing |
| 50 users | $3,250/moProfessional | 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 Front
- Higher Cost score (4/10 vs 2/10)
- Higher Ease of Use score (8/10 vs 7/10)
- Better fit for small business (6/10 vs 1/10)
- Better fit for mid-market (8/10 vs 5/10)
Why choose Sierra
- Higher Output Quality score (9/10 vs 6/10)
- Higher Customization score (9/10 vs 7/10)
- Better fit for enterprise (10/10 vs 6/10)
Pros & Cons
Front
Pros
- Collaborative shared inbox with comments and assignment, which reviewers say is easy to adopt for teams used to email.
- Autopilot can be tested in simulations before deployment, which lowers the risk of an AI agent misbehaving with customers.
- Smart CSAT estimates satisfaction even when customers skip surveys, alongside automated QA scoring.
- Lets third-party AI agents work inside the platform, so it is not locked to Front's own AI.
- A 14-day trial with Professional features and no credit card required.
Cons
- AI is priced on top of seat fees: Copilot costs $20 per seat and Autopilot is billed per conversation.
- Seat caps of 10 on Starter and 50 on Professional push growing teams into higher tiers.
- Reviewers report weak HubSpot syncing that can require manual data entry.
- Some users report bugs such as threads sorting incorrectly and automation rules not firing.
- The pricing page shows only annual prices, so monthly costs are not public.
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 Front. The largest gap is in Output Quality: 6/10 for Front and 9/10 for Sierra.
No, neither Front nor Sierra lists a free plan.
Front is the better fit for small business: we rate it 6/10 for them, against 1/10 for Sierra.
