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Nousu vs Siena AI
Siena is an enterprise AI agent for larger DTC brands, sold through a sales process at $750 per month plus $0.90 per automated ticket. Nousu executes the same category of store actions at a flat €29 to €149 per month, self-serve, on Shopify and WooCommerce. The structural difference is the entry price and the meter.
Nousu vs Siena AI, side by side
Nousu next to Siena AI on the 6 dimensions that decide the fit for an online store.
| Nousu | Siena AI | |
|---|---|---|
| Pricing model | Flat monthly tiers: €29, €79, or €149, sized by conversation volume. Overage never billed. | $750/month platform fee plus $0.90 per automated ticket; final quote via sales (as of July 2026). |
| Entry price | €29/month, sized for 150 conversations. | $750/month, before the first ticket is automated. |
| AI capability | Executes actions: live order lookups, return labels, refunds within approval rules you set. Copilot or autopilot per topic. | Executes end to end: address updates, return labels, refunds, replacements, subscription changes (per siena.cx). |
| Platform coverage | Shopify and WooCommerce, both first-class. | Shopify-first; third-party reviews list Shopify and Fulfil as supported. No WooCommerce. |
| Setup | Self-serve. 14-day trial, no credit card. | Sales-led. Expert onboarding and dedicated Slack support included. |
| Data residency | EU data residency. GDPR. | Not covered by our sources. Ask Siena. |
Pricing model
Siena charges a $750 per month platform fee plus $0.90 per automated ticket, with the final quote settled on a sales call (as of July 2026, per siena.cx/pricing). The meter runs on success: the better the agent performs and the better your sales month goes, the higher the invoice. At 3,000 automated tickets a month, that is $3,450 before discounts.
Nousu tops out at €149 per month, sized for 2,500 conversations, and going over a bundle never bills overage.
Entry price
The gap here is the widest in this category. Siena's platform fee lands before the first ticket is automated, which is why its own pricing page routes you to sales. Nousu's entry tier is €29 per month for 150 conversations (per nousu.chat/pricing), and you can check out with a card.
If your support budget is under roughly $750 a month, the comparison ends at this row. No discount call changes the shape of the model.
AI capability: both execute
Credit where due: Siena executes, and it did so early. Per Siena's site, it updates addresses, generates return labels, issues refunds, sends replacements, and manages subscriptions (skip, pause, swap) inside a single conversation. Its brand-voice work, built on AI Personas, is the part reviewers praise most consistently.
Nousu covers the store-action core: live order lookups, return labels, refunds within approval rules you set, with copilot or autopilot per topic. If subscription management inside support conversations is central to your queue, Siena covers more of that today. If order status, returns, and refunds are the bulk of your queue, both products do the work, at very different prices.
Platform coverage
Siena is Shopify-first. Third-party reviews list Shopify and Fulfil as the supported commerce platforms as of July 2026, so WooCommerce stores are out. Nousu treats WooCommerce and Shopify the same, with the same actions on both.
Setup
Siena is sales-led: no card checkout, no published final price, and once you are in, expert onboarding plus dedicated Slack support (as of July 2026, per siena.cx/pricing). You are buying a service relationship along with the software.
Nousu is self-serve. Connect your store, let it learn your catalog and policies, and test it on your own customer questions during a 14-day trial with no credit card.
Data residency
Nousu offers EU data residency and is GDPR-first. Siena's public pricing page does not cover data residency, so ask during the sales process if it matters to your setup.
Choose Siena AI if
- You are a larger DTC brand with the ticket volume to dilute a $750 monthly fee, and budget for $750/month plus the meter.
- Brand voice depth is a top requirement. Siena's AI Personas are the most consistently praised part of the product in reviews.
- You want managed onboarding and a vendor on the hook, and a sales process is acceptable to you.
- You need subscription management (skip, pause, swap) handled inside support conversations.
Choose Nousu if
- Your support budget is under $750 a month. Nousu's top tier is €149.
- You run on WooCommerce, where Siena's actions are not available.
- You would rather test a product this afternoon than book a call this week.
- You want a flat bill with overage never billed, instead of a meter that peaks in November.
See the numbers at your ticket volume
Set your monthly volume and compare Nousu against Siena AI with sourced prices.
Competitor details checked July 19, 2026. Sources: siena.cx/pricing ($750/mo platform + $0.90 per automated ticket; final quote via sales), nousu.chat/pricing. Vendor pricing changes; verify before you sign.