What Is Siena AI and How Much Does It Cost in 2026?

Siena AI is an AI customer experience platform for consumer and ecommerce brands, and it costs a $750 monthly platform fee plus $0.90 per ticket automated, according to its own pricing page (checked 24 September 2026). It runs as a layer on top of help desks like Gorgias and Gladly, has no self-serve trial, and quotes your final price after a short form.

We build AI agents for customer service ourselves, so we read Siena's claims the way a buyer evaluating both products would: what's a real mechanism, what's a case-study number, and what's marketing.

What is Siena AI?

Siena AI was founded in 2023 by Andrei Negrau and Lisa Popovici and raised a $4.7 million seed round that November, backed by Sierra Ventures, Pari Passu Ventures, Spacestation Investments, Village Global, The Council, and OpenSky Ventures. The company's pitch from day one has been "empathic" AI: agents built specifically for direct-to-consumer brands, where tone and brand voice matter as much as resolving the ticket. Its homepage now calls it "the AI CX operating system for consumer brands."

Siena targets ecommerce and consumer brands specifically; it doesn't chase enterprise support in general. Named customers on its homepage include Spanx, Coterie, HexClad, Prose, Everyday Dose, Kitsch and Terra Kaffe. Published results cite Simple Modern reaching 98% customer satisfaction, 65% automation at Coterie and HexClad, and a Spanx VP saying Siena handles 50% of their conversations at 90%+ CSAT. Siena also claims up to 80% automation of customer interactions. Those are vendor-published, customer-specific figures, not an independently audited average across all Siena customers, so treat them as evidence of what's achievable rather than a number you should expect on day one.

How does Siena AI's CORE engine work?

Siena's core technical claim is its CORE engine, described as a cognitive reasoning system that determines the right resolution path for a customer issue rather than just retrieving the closest-matching help article. In practice this means a single conversation can touch multiple systems at once: looking up an order, checking a return policy, and issuing a replacement, without a human stitching those steps together manually.

The platform is organized around distinct agents, each scoped to one job:

• Customer Service Agent handles support inquiries across email, chat and messaging.
• Shopping Agent makes product recommendations and drives sales conversations, blurring the line between support and merchandising.
• Social Agent manages replies and engagement on social channels and comments.
• Reviews Agent is also listed on Siena's homepage, a sign the product now reaches past the support inbox.
• QA Agent automatically scores conversations for quality, a function usually left to a human QA team.
• Topics Explorer and Ask Siena surface recurring themes and voice-of-customer insights across conversations.
• Copilot gives human agents brand-voice-consistent draft replies and translations when a conversation needs a person, alongside newer Memory and Docs features.

The mechanism worth understanding is AI personas: Siena lets a brand define distinct voices for different channels, so a social media reply can sound casual and on-brand while an email about a billing dispute stays formal. The platform bills itself as "platform agnostic", meaning it's built to sit on top of whatever help desk a brand already runs.

Which help desks does Siena connect to?

Siena integrates with Gorgias and Gladly, among other help desks. Per Gorgias' Siena documentation, you connect your Gorgias subdomain from the Channels section of Siena's app, which auto-creates an HTTP integration and a dedicated Siena agent that sends replies on your behalf. Automated tickets get the tag "handled-by-siena" inside Gorgias, so a team can audit what the AI actually sent versus what a human wrote. That tagging detail matters more than it sounds: it's the difference between trusting a vendor's dashboard number and being able to check the work in the help desk your team actually reads.

What features does Siena AI include?

• CORE engine: cognitive reasoning across multiple systems (orders, policies, inventory) inside a single conversation.
• Customer Service, Shopping, Social and Reviews agents: purpose-built agents for support, sales, social replies and reviews rather than one generic bot.
• AI personas: distinct, brand-defined voices per channel, so a casual social reply and a formal billing email don't sound like the same account.
• QA Agent and Topics Explorer: automated conversation scoring and voice-of-customer theme surfacing.
• Subscription management: automated skip, pause and swap handling for subscription-model brands.
• Copilot: draft replies and translations for human agents on complex tickets.
• Multilingual support across text-based channels.

How much does Siena AI cost?

Siena is unusual in this category: it publishes its pricing structure, though the pricing page also opens with a short quiz (team size, tickets per month, then your details) before a custom quote.

We checked the page again on 24 September 2026. Past the quiz, the structure is stated as fixed copy in three parts. The platform fee is $750/month and covers access to Siena's core AI engine and an unlimited sandbox. The automation pack is $0.90 per ticket automated. Support and implementation, described as expert onboarding plus dedicated Slack support, is included rather than sold separately.

The page is explicit that the final number is tailored: "Tell us what you need and we'll send pricing that fits." So the $750 + $0.90 per ticket structure is real and published, but your actual monthly bill depends on volume and terms you won't see until you talk to the Siena team. There's no free trial or self-serve signup on the pricing page.

Worth doing the arithmetic: at 1,000 automated tickets a month, the published structure works out to $750 + $900 = $1,650, or about $1.65 per ticket blended. At 5,000 tickets, it's $750 + $4,500 = $5,250, or about $1.05 per ticket blended, since the flat platform fee dilutes as volume grows. That structure carries a built-in incentive: the $750 is sunk the moment you sign, so every additional automated ticket is closer to pure margin for Siena, which is worth remembering if a sales rep is encouraging you to automate scenarios you wouldn't otherwise hand to AI. A small brand automating a few hundred tickets a month pays a much higher blended rate than a brand automating thousands.

What reviewers say: G2's Siena AI page listed 28 reviews when we checked on 21 September 2026, and Siena has no Capterra listing. G2 would not serve us the star rating in a way we could verify, so we are not quoting one here. The review count is what we could confirm, and 28 is a small sample either way.

What are Siena AI's pros and cons?

Pros

• Publishes its price structure, unusual for AI CX platforms at this scope.
• Purpose-built for ecommerce workflows: shopping, subscriptions and social replies, in one system.
• AI personas give real brand-voice control per channel.
• QA Agent and Topics Explorer add value beyond ticket automation, covering tasks a human QA analyst would otherwise do.
• Transparent tagging in Gorgias lets a team audit AI-sent replies against human ones.

Cons

• No free trial or self-serve signup; you talk to sales before testing anything.
• The $750 platform fee is a fixed cost that hits small-volume brands hardest on a blended per-ticket basis.
• Built specifically for consumer and ecommerce brands, so a B2B or non-retail support team is a weaker fit.
• Case-study automation and CSAT numbers are vendor-published and specific to each brand's setup.

Who is Siena AI best for?

Siena AI suits teams at a direct-to-consumer or ecommerce brand already running Gorgias or Gladly that want one AI system covering support, shopping recommendations and social replies with a consistent, on-brand voice. The subscription management and QA scoring features target the operational pain of a growing DTC brand: skip, pause and swap requests, and checking whether AI-sent replies actually sound like the brand.

It's the wrong choice if you run a B2B support team, sit outside ecommerce, or want to test a tool before signing anything: Siena's pricing page collects your details for a quote instead of offering a signup button.

How does Siena AI compare with alternatives?

Siena's pricing structure is closer to Macha's than most vendors in this category: both charge per ticket, both publish a number, and both include setup, since Siena's platform fee covers expert onboarding and dedicated Slack support. The difference is scope, platform choice and the fixed fee. Macha runs on top of whichever help desk your team already uses, including Zendesk, Intercom and HubSpot, and doesn't carry a fixed monthly platform fee: $299 a month covers 750 tickets, about $0.40 a ticket, where Siena's $750 platform fee comes before its $0.90 per automated ticket. Macha's setup is done for you too: the Macha team analyzes your past tickets, builds the knowledge base and the agent, and runs it in safe mode, with drafts as internal notes in your help desk, until the drafts are right, and the price includes a dedicated success manager who handles your changes. If your brand's whole operation already centers on shopping and social replies alongside support, Siena's combined scope may be worth its price. If you mainly need agents answering tickets inside the help desk you already run, compare the blended cost at your real volume against Macha's pricing before choosing.

Two ecommerce alternatives belong on the same shortlist and have full guides here: Zowie, which sells the same brand-voice AI to the same retailers, and Yuma AI, if Shopify support actions rather than social and shopping channels are the real job.

How we researched this: The features, pricing and customer figures above come from Siena AI's own public pages and the third-party sources linked inline. We re-checked Siena's pricing page, homepage and Gorgias integration docs, plus Gorgias' own pricing, on 24 September 2026. The G2 review count was read on 21 September 2026; we could not verify a star rating, so none is claimed.

FAQ

What is Siena AI? Siena AI is an AI customer experience platform, founded in 2023, built for ecommerce and direct-to-consumer brands, covering support, shopping recommendations, social media replies, and conversation quality scoring.

How much does Siena AI cost? Siena publishes its structure: a $750/month platform fee (core AI engine plus an unlimited sandbox) plus $0.90 per ticket automated, with onboarding and Slack support included. The final quote is tailored after you share your needs.

Does Siena AI have a free trial? No. There's no self-serve trial or signup listed; the pricing page collects your details for a custom quote.

What is Siena AI's CORE engine? CORE is Siena's cognitive reasoning system. It determines the right resolution path across multiple systems (orders, policies, inventory) within a single conversation, going beyond a simple help-article match.

What help desks does Siena AI integrate with? Siena integrates with Gorgias and Gladly, among others, and describes itself as platform agnostic. The Gorgias integration connects via your Gorgias subdomain, creates a dedicated Siena agent, and tags automated tickets "handled-by-siena" for auditing.

Who uses Siena AI? Publicly named customers include Spanx, Coterie, HexClad, Prose, Everyday Dose, Kitsch and Terra Kaffe. Siena cites Simple Modern at 98% customer satisfaction and 65% automation at Coterie and HexClad.

How much funding has Siena AI raised? $4.7 million in a seed round announced November 2023, backed by Sierra Ventures, Pari Passu Ventures, Spacestation Investments, Village Global, The Council, and OpenSky Ventures.

What are good alternatives to Siena AI? For a brand fully committed to one help desk, that help desk's own native AI agent (such as Gorgias') is a lighter-weight option. For a team that wants published, per-ticket pricing without a fixed platform fee, Macha is a comparable alternative that runs on top of the help desk you already use, set up and run for you by the Macha team at about $0.40 a ticket, with a dedicated success manager included.

Does Siena AI work outside ecommerce? It can, but its features (Shopping Agent, subscription management, Social Agent) are built around retail and DTC workflows, so a non-ecommerce support team will pay for capability it won't use.

Sources: Siena AI homepage, Siena AI pricing, TechCrunch: Siena AI raises $4.7M, Siena AI on Gorgias docs, Gorgias pricing.