Agentic Index
Decagon vs Sierra (2026)
Decagon and Sierra are the two most talked about AI native enterprise support agents, and both score strongly in our matrix, so the choice is about pricing model and tooling philosophy. Sierra leans on outcome based pricing with standout testing, observability, and model flexibility, while Decagon emphasizes deep support toolchain integration with strong knowledge grounding, orchestration, and memory. Both are contact sales and priced for large support organizations.
| At a glance | Decagon | Sierra |
|---|---|---|
| Category | Customer support agent | Customer support agent |
| Entry price | Contact sales | Outcome-based (per resolution) · contact sales |
| Free / trial | n/p | — |
| Pricing confidence | contact only | contact only |
| Feature |
D
Decagon
|
S
Sierra
|
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Full / Explicit | Full / Explicit |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Full / Explicit | Full / Explicit |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Full / Explicit | Full / Explicit |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
Full / Explicit | Full / Explicit |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
Full / Explicit | Full / Explicit |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Partial | Full / Explicit |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Full / Explicit | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Partial | Full / Explicit |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Partial | Partial |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Full / Explicit | Partial |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
No / Not documented | Full / Explicit |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Full / Explicit | Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
Partial | Full / Explicit |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing |
D
Decagon
|
S
Sierra
|
|---|---|---|
|
Entry price Lowest public entry point |
Contact sales | Outcome-based (per resolution) · contact sales |
|
Pricing confidence How public the numbers are |
Contact only | Contact only |
|
Billing Primary billing axis |
hybrid | outcome-based (per resolution/outcome) |
|
Variable cost Workload / overage exposure |
High variable cost | High variable cost |
|
Free tier / trial Try before you buy |
No free tier
|
No free tier
|
|
Buying motion Self-serve vs sales call |
Sales call | Sales call |
Choose Decagon if
- You want an agent built specifically for support with deep integration, strong knowledge grounding, and durable memory across conversations.
- You prefer a focused support agent over a broader conversational platform.
- Tight integration into your helpdesk and internal systems is the deciding factor.
Choose Sierra if
- You want outcome based pricing that bills on resolution, plus strong testing and observability around the agent.
- Model flexibility and a polished agent platform weigh heavily.
- You have the volume and budget for an enterprise engagement, often six figures at scale.