Sierra
Sierra builds branded voice and chat agents for support, charging per resolved conversation rather than per seat.
Full Sierra record →Head to head
Sierra vs Zapier Agents
Sierra (Sierra) and Zapier Agents (Zapier) both sit in Agents & Automation. Zapier Agents shipped more tracked changes in the last 30 days (4 vs 1). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Sierra Sierra | Zapier Agents Zapier |
|---|---|---|
| Segment | Agents & Automation | Agents & Automation |
| Version | Agent OS 2.0 | Agents |
| Entry cost | Pricing is not published (outcomes-based model: pay for results, not tokens). Contact sales. | Free tier · from $19.99/mo |
| Pricing tiers | Outcome pricing free | Free free · Professional $19.99 · Team $69 |
| Model stack | Claude · GPT-5 class · Sierra Agent OS 2.0 | fine-tuned model · fine-tuned model for research and task management · task management · Zapier Agent fine-tuned model · Zapier Agent's fine-tuned model · Zapier Agent’s fine-tuned model for research · Zapier fine-tuned model |
| Context window | Model-dependent | Not published |
| Public API | ||
| Routes models | ||
| Changes / 30d | 1 | 4 |
| Origin | Global | Global |
| Capabilities | Voice and chat agents, Agent OS, Brand persona control, Supervisor tooling, Outcome analytics, Horizon (Long-horizon agents), Ghostwriter (Agent-building agent), Agent Studio 2.0 | 8000+ app actions, Live data sources, Behaviour instructions, Scheduled triggers, Chatbots, No-code agent builder, 9,000+ app integrations, Knowledge base connection |
Zapier Agents
Autonomous agents that act on top of Zapier's integration catalogue.
Full Zapier Agents record →