What it is
Siena AI is an autonomous support agent for direct-to-consumer brands that runs on top of the helpdesk you already have instead of replacing it. Its integrations page lists six helpdesks — Gorgias, Zendesk, Intercom, Kustomer, Gladly, and Dixa — so tickets still land in the same queue, and Siena answers, acts, or hands off from inside it. The actions come from the store and the post-purchase stack: Shopify and Fulfil for orders, Loop Returns for returns, Recharge, Skio, Ordergroove, Stay AI, Smartrr, and Prive for subscriptions, AfterShip, ShipBob, ShipMonk, and Wonderment for tracking, plus Stripe, Klaviyo, Yotpo, and Okendo.
The product has grown from one support agent into a set of them: the Customer Service Agent, a Shopping Agent for product recommendations, a Social Agent for comment moderation, a Reviews Agent (August 2025), a QA Agent, and Topics Explorer for voice-of-customer analysis. Recent changelog entries are video understanding for warranty and troubleshooting claims (January 2026) and AI-built custom vendor connections (May 2026). A voice agent is in development, not shipping.
The company was founded in 2022 by Andrei Negrau and Lisa Popovici and is based in New York. It raised a $4.7M seed in November 2023 and announced a $17M Series A led by York IE on 2026-10-06, with Joyance Ventures, Aglaé Ventures, and Sierra Ventures, bringing total funding to $29.7M. It names SPANX, FIGS, HexClad, Kitsch, and Comfrt as customers and says “hundreds of brands” run it in production.
Why it shows up in Customer Success stacks
- No re-platforming. A CX team that just finished a Zendesk or Gorgias rollout can add autonomous resolution without migrating macros, reporting, or agent habits. That is the whole pitch, and the reason our Gorgias and Richpanel pages send readers here when only the automation is missing.
- Brand voice is the product focus. Siena’s case studies lean on CSAT, not only deflection: SPANX reports 50% of conversations handled at 90%-plus CSAT and handle time cut in half, and Kitsch reports over 68% of support automated. These are vendor-published figures from its best accounts.
- Subscription depth. Six subscription platforms are integrated, more than most ecommerce helpdesks ship natively, which matters for supplement, coffee, and consumables brands where “skip, swap, pause” is the top intent.
- Procurement-ready. The trust center lists SOC 2 Type II reports for 2023 through 2026 and claims GDPR, CPRA, and HIPAA compliance. OpenAI and Anthropic appear as subprocessors, with processing listed in the United States.
Pricing
As published on 2026-10-08: a $750 per month platform fee for the core engine and an unlimited sandbox, an Automation Pack at $0.90 per automated ticket, and a separate, unpriced Support & Implementation tier. No free trial is listed and the final number comes through a sales form.
Model it next to your helpdesk bill, not instead of it. A brand handling 3,000 tickets a month that automates 40% pays $750 plus 1,200 tickets at $0.90 — $1,830 a month to Siena, on top of the helpdesk. The same 1,200 resolutions through Gorgias’ own AI Agent cost $1,080 on annual billing, so Siena carries a $750 monthly premium at equal performance. Each extra resolution Siena wins over the native agent also bills $0.90, so the premium pays back only through agent time saved: if a human-handled ticket costs you $4, Siena needs about 240 more resolutions a month than the native agent to break even ($750 ÷ $3.10). Measure the native agent’s rate first; that number decides the purchase.
Best for
Heads of CX at Shopify DTC brands handling roughly 2,000 tickets a month or more, with a helpdesk they intend to keep and a queue dominated by order status, returns, and subscription changes. It is the wrong pick below about 1,000 tickets a month, where the platform fee alone outweighs the work it removes, and for B2B or software support, where tickets turn into engineering work rather than refunds.
Watch-outs
- You pay two meters for one ticket. A ticket Siena resolves still exists in your helpdesk — on Gorgias it can count toward the plan’s ticket allowance, on Zendesk you keep paying for every agent seat — and Siena bills $0.90 on top. The guard: before signing, list both charges for one resolved ticket in a single spreadsheet row, and ask Siena in writing whether an “automated ticket” bills when the agent starts the conversation and then escalates.
- Handoffs are the weak spot reviewers name. A June 2026 teardown of its G2 reviews — 4.8/5 across 28 reviews, written by a competitor — found the most common complaint is escalation: the agent keeps replying after a human takes over, or closes out-of-scope tickets. The guard: during the pilot, sample 50 escalated conversations a week and fail the pilot if the agent posts after a human assignment or closes a ticket outside its configured intents.
- Vendor-published automation rates are ceilings. “Up to 80% of interactions” is the best deployment, not your baseline. The guard: write a resolved-without-human-reply-within-72-hours floor, measured on your own tickets, into the contract, and tie the renewal price to it.
Alternatives, and when to pick them instead
Gorgias and Zendesk are the market-share leaders, and both now sell a native AI agent billed per resolution. Pick Gorgias’ agent when you run Gorgias and want one vendor owning the resolution without a platform fee. Pick Zendesk’s agents (about $1.50 per resolution on committed volume) when support spans B2C and B2B. Pick Siena when your measured automation rate on the native agent has stalled and you need the extra resolutions or the brand-voice control.
eesel AI is the budget overlay: $0.40 per handled ticket and no platform fee. Pick it under 2,000 tickets a month or when you also run non-ecommerce support. Richpanel replaces the helpdesk too, at $0.20 per AI-handled conversation; pick it when you are leaving your helpdesk anyway. Yuma AI is the closest overlay rival on Shopify; pick it when you want per-resolution-only pricing. Decagon (a reported ~$50,000 annual platform fee) and Lorikeet (from $18,000 a year) fit enterprise and regulated support where the agent writes to systems of record. Under 500 tickets a month, buy none of them — helpdesk macros and a returns portal will do.