The Sierra Insider’s Guide
Everything we know about Sierra in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Sierra
The Insider’s Guide
Conversational AI agents for customer service at large brands
Every plan, grade, refund rule and rival among AI agents, read from Sierra’s own pages.
Made by Sierra · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Sierra’s own pages, its app-store listings and our grades. Every fact in it is on Sierra’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
1.6
GPA, above 0 of the 101 other AI agents we grade
Sierra builds AI agents that handle customer conversations across chat, SMS, WhatsApp, email, voice and ChatGPT. Its Ghostwriter tool builds an agent from documents and plain-English instructions, and its Insights tools monitor and test it. Sierra says it uses outcome-based pricing, but it publishes no prices.
To get you started, here are 7 things to know about Sierra, taken from its own pages and our grades.
No price is published, there is no self-serve sign-up or free plan, and the site gives no list of integrations.
- 1
Best for big consumer brands buying a service agent from the vendor
Sierra builds conversational AI agents for customer service at large brands, priced by outcome.
- 2
It runs on Web
Web.
- 3
Ghostwriter agent builder
Builds an agent from uploaded SOPs, transcripts and recordings or a plain-English description, with guardrails and multilingual support.
- 4
Channels
A single agent can be deployed on chat, SMS, WhatsApp, email, voice and ChatGPT.
- 5
Insights
Explorer analyzes conversations, Monitors flags the ones that need attention, and Experiments runs multivariate tests.
- 6
A 1.6 GPA, above 0 of 101
That is against the other AI agents we grade, on value, the free plan, features, ease of use and platforms.
- 7
Keep it
To replace Sierra you would be making an AI agent, with the models and the safeguards behind it. That is not a weekend's work, with an AI app builder or without one.
Sierra at a glance
- Pricing
- Paid
- Free plan
- No
- Free trial
- None stated
- Runs on
- Web
- Made by
- Sierra
- Category
- AI Agents
- Our grade
- 1.6 GPA, weak
The report card
Best for big consumer brands buying a service agent from the vendor
Sierra builds conversational AI agents for customer service at large brands, priced by outcome. No price is published, there is no self-serve sign-up or free plan, and the site gives no list of integrations.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | No price is published; the site says pricing is outcome-based and points to a sales call. |
| Free plan and trial | F | No free plan and no sign-up. The route is a sales conversation. |
| Features | C | An agent builder, channels, insights and observability are listed, but nothing in the listing says how far each goes. |
| Ease of use | C | No store rating on record, and a large brand has to onboard it with the vendor. |
| Platforms and integrations | C | Web only, and the site lists no integrations. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Sierra is for
- Fits if you are a large brand with heavy customer service volume
- Makes sense if you want to pay by outcome rather than seat
Who it is not for
- Not for you if you want a price, as none is published
- Not for you if you want to try it, since there is no self-serve sign-up or free plan
- Skip it if you are small, because the site is aimed at large brands
- Watch out: no integrations are listed, so ask what it connects to
Good to know
Good for
- Large consumer brands handling high volumes of conversations
- Teams that want to build agents with or without engineers
- Companies that want a vendor paid by results
Worth knowing
- No prices are published; Sierra says pricing is outcome-based and points visitors to a sales conversation.
- No self-serve sign-up or free plan is shown on the site.
- The site gives no list of integrations.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
Sierra's current pricing could not be confirmed from its own site.
No price is published; the site says pricing is outcome-based and points to a sales call.
We could not confirm Sierra’s current prices from its own site, so this guide lists no plans. sierra.ai has them.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Conversational AI agents for customer service at large brands. Here is what it does, as its own site describes it, and what it covers: AI features, AI agents, AI support agent, chatbots.
An agent builder, channels, insights and observability are listed, but nothing in the listing says how far each goes.
- Ghostwriter agent builder
- Builds an agent from uploaded SOPs, transcripts and recordings or a plain-English description, with guardrails and multilingual support.
- Channels
- A single agent can be deployed on chat, SMS, WhatsApp, email, voice and ChatGPT.
- Insights
- Explorer analyzes conversations, Monitors flags the ones that need attention, and Experiments runs multivariate tests.
- Observability
- Shows each agent action, including tool calls and knowledge lookups, along with latency.
- Horizon
- Plans multi-step outcomes over days or months, using memory of the customer across conversations and systems.
Where it runs
- Web
What it works with
Its own pages name no integrations.
Sierra is made by Sierra.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
0/101
Other AI agents it is graded above
Sierra's GPA of 1.6 is higher than 0 of the 101 other AI agents we grade, and level with 10.
It stands best on value for money (C, above 17 of 101) and worst on free plan and trial (F, above 0).
Each grade against the category
Every bar is all 102 AI agents we grade, cut by the letter each got. Sierra’s own letter is outlined.
- CValue for moneyAbove 17 of 101
- FFree plan and trialAbove 0 of 101
- CFeaturesAbove 1 of 101
- CEase of useAbove 14 of 101
- CPlatforms and integrationsAbove 0 of 101
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
To replace Sierra you would be making an AI agent, with the models and the safeguards behind it. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 91 of the 101 other AI agents grade higher.
What you could not
- An AI agent, with the models and the safeguards behind it.
- An AI model answering your customers from your own help articles.
- A chatbot builder hooked into the messaging apps.
What this rests on. Sierra’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Decagon, Intercom Fin, Ada, Kore.ai and Parloa
The 5 tools Sierra is most often weighed against, with where each one differs from it.
- 1.6GPA
Decagon
Paid
AI concierge agents for customer support across voice, chat and email.
- Decagon also covers a/B testing.
- 2.2GPA
Intercom Fin
Free trial · from $19/mo
AI customer service agent billed per resolved conversation.
- Intercom Fin also covers help desk and live chat.
- 1.6GPA
Ada
Paid
AI customer service agent platform for chat, email, voice and social.
- 1.6GPA
Kore.ai
Paid
Enterprise agent platform for service, work and process automation.
- Kore.ai also covers AI search and workflow automation.
- 1.8GPA
Parloa
Paid
AI agent platform for enterprise customer service.
- Sierra also covers chatbots.
- Parloa also covers no-code.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
9
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Sierra free?
No. Sierra is a paid product.
What platforms does Sierra work on?
Sierra is available on Web.
Does Sierra have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Sierra is listed for Web.
Does Sierra have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Sierra is listed for Web.
Is Sierra open source?
Sierra is not described as open source on its own site, as read on Nov 12, 2026.
Who makes Sierra?
Sierra is made by a company of the same name.
What are the alternatives to Sierra?
The closest alternatives to Sierra in our directory are Decagon, Intercom Fin, Ada, Kore.ai and Parloa.
How does Sierra compare with other AI agents?
Sierra's GPA of 1.6 is higher than 0 of the 101 other AI agents we grade, and level with 10.
Could I make my own version of Sierra?
To replace Sierra you would be making an AI agent, with the models and the safeguards behind it.
Where this guide comes from
The prices, plans, platforms and features were read from Sierra’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from Sierra's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Sierra. Prices change, so check sierra.ai before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Sierra, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/sierra
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Sierra: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/sierra
Know someone choosing between AI agents?
Send them this guide: toolgpa.com/tools/sierra/guide
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See our other guides
The best-graded AI agents after Sierra, each with an Insider's Guide of its own.
- AI Agents Insider's GuideEvery one of the 102 AI agents we grade, compared
- Genspark Insider's GuideAI workspace with an agent for research, slides, sheets and docs3.2 GPA
- Manus Insider's GuideGeneral AI agent for research, slides, websites and browser tasks3.2 GPA
- OpenClaw Insider's GuideOpen-source personal AI agent you run yourself and message in chat3.2 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Sierra’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Sierra is a trademark of its owner, and this guide is not made, paid for or approved by Sierra. Prices and plans change: check sierra.ai before you buy.