Comparison
Siena is autonomy-first commerce support. Archet centers merchant-controlled execution: draft supported Shopify order actions, approve them in one click, and retain the outcome.
Free plan on the web, or a 14-day trial when you install Archet through Shopify.
Governed selected actions
Archet currently supports order cancellation without automatically refunding, shipping-address changes, fulfillment and governed merchant-initiated refunds. Returns and inventory writes are not shipped. On Pro and above, approval and audit controls are included.
Control posture you can choose
Every supported action drafts for one-click approval by default. Merchants can explicitly auto-approve cancellation, fulfillment and capped refunds with no fraud signal, while address changes stay approval-gated. Every request and outcome is recorded.
| Feature | Archet | Siena |
|---|---|---|
| Order actions | On Pro and above, Archet drafts supported order actions and merchant-initiated refunds for one-click approval. Merchants may opt into auto-approval for cancellation, fulfillment and capped refunds with no fraud signal. Every request and outcome is recorded. | Siena documents automatic cancellations, refunds, replacements and order edits through its Shopify integration. |
| Execution control | Draft-first by default, with explicit one-click approval and narrowly opt-in auto-approval for cancellation, fulfillment and capped refunds with no fraud signal. | Autonomy-first, end-to-end resolution positioned around immediate handling without agent involvement. |
| Auditability | Approval and audit controls are included on Pro and above, with the request, decision and execution outcome recorded. | Evaluate Siena's conversation history, action trace and approval controls against your organization's evidence requirements. |
| Merchant operations | Connect Slack to ask a dedicated Operations agent about orders, revenue, inventory and fulfillment. | Customer-experience automation is the documented focus; merchant operations is not presented as a separate agent surface. |
| Shopify context | Uses Shopify Storefront, Customer Account and Admin connections for shopper context and selected governed operations. | Uses order history, product data and customer context for personalized Shopify responses and automatic order management. See Siena’s integration overview. |
| Operating model | Shopper Support and merchant Operations agents are provisioned together, with separate channel bindings and connector access. | Integrates with the existing helpdesk and commerce stack for autonomous customer resolutions, as described in Siena’s product positioning. |
| Pricing structure | Published base plans use model-weighted units; usage-dependent cost overage can apply above the plan ceiling. | Siena’s pricing flow says pricing is based on ticket volume and team structure. Verify current platform, automation and implementation terms directly. |
Siena details reflect its official Shopify integration, product positioning and pricing flow as reviewed in July 2026. Archet is not affiliated with or endorsed by Siena. Features and commercial terms may change; verify current terms.
Governance checklist
Autonomy can be useful. The operational question is how each write is controlled and proven.
Archet starts with a merchant approval step for supported writes. Ask any autonomy-first platform which actions can be held for review before execution.
Archet limits opt-in auto-approval to cancellation, fulfillment and capped refunds with no fraud signal. Shipping-address changes remain approval-gated.
Archet records the request and execution outcome. Compare the exact event-level record, retention and export behavior you need.
Setup normally provisions shopper Support and merchant Operations agents. Connect Slack separately to bind the Operations agent for your team.