Sistava vs Sierra
AI Customer Support
Sistava vs Sierra
Sierra builds enterprise-grade AI customer service agents using a multi-model "constellation" architecture for companies like SiriusXM, WeightWatchers, and Sonos. Unlike Sierra with 3-6 month implementations and $150K+ annual contracts, Sistava offers pre-built AI employees from a marketplace that handle support plus sales, marketing, and ops, with transparent pricing starting free.
Profile
- Pricing
- Enterprise only. Outcome-based. Reported six-figure setup fees and annual contracts (per public reports).
- Founded
- 2023, San Francisco (co-founded by ex-Salesforce CEO Bret Taylor)
- Funding
- Reportedly $635M raised at a $10B valuation (Sep 2025, per public reports).
- Focus
- Enterprise AI agents for customer service that take real actions
Why Sistava
- Sistava hires pre-built AI teams in minutes from a marketplace. Sierra runs reported 3-6 month custom implementations.
- Sistava covers support, sales, marketing, and ops. Sierra is customer support only.
- Sistava has transparent pricing from Free to $399/mo. Sierra has opaque enterprise contracts (reportedly six figures per year).
- Sistava connects to thousands of apps plus custom MCP servers. Sierra has limited CRM and order management integrations.
- Sistava retains memory across conversations and channels (graph + episodic). Sierra relies on per-conversation context.
Feature Comparison
| Feature | Sierra | Sistava |
|---|---|---|
| Reportedly 3-6 months | Minutes | |
| Reportedly six figures per year | Free ($0/mo) | |
| Customer support only | Support, sales, marketing, ops | |
| ✗ | ✓ | |
| Per-conversation context | Graph + episodic, persistent | |
| CRM + order APIs | Thousands of native + MCP | |
| ✗ | ✓ | |
| ✗ | ✓ | |
| Proprietary | ✓ | |
| Brand safety monitoring | PII detection, approval gates | |
| Omnichannel voice | ✓ | |
| ✗ | ✓ | |
| ✓ | ✗ | |
| Multi-model constellation | OpenAI, Anthropic, Google, open-source |