An AI IVR answers a phone line with an AI agent instead of a keypad menu. The caller says what they need in their own words, and the agent answers, asks follow-up questions or sends the call to the right person. Komms does this for $0.08 a minute with the phone call included.

Can an AI agent replace a phone menu?

Yes. A Komms agent answers every call, works out what the caller needs, answers from your documents, screens and qualifies callers, takes messages and transfers to a person or team. Callers do not press keys or sit through a list of options.

How much does it cost to replace an IVR with Komms?

$0.08 a minute with the phone call, the AI and a standard voice included, plus $15 a month per phone number. 3,000 calls a month at one minute each is about $255. There is no setup fee and no per-agent fee.

Can Komms send calls to my team's computers?

Yes, with Kurrent. Kurrent routes each call to a phone, a softphone or a browser, and your website can have a call button that rings through the browser too. Komms can answer first and transfer to the right person.

Does Komms work with my existing phone number?

Yes. Forward your number to Komms, or move the number over. Forwarding can be for all calls, when busy, or when no one answers.

Compare · Sierra

Sierra AI pricing: paid per outcome, set by contract

Sierra builds customer-service agents for large brands and charges when its agent achieves an outcome, such as a resolved conversation. The rates are set in a contract and not published, and you start through its sales team. Komms is $0.08/min, phone call included, and you can sign up online.

Sierra read on its own site on 28 October 2026.

Sierra vs. Komms

	Sierra	Komms
How you start	Through its sales team; no sign-up form or free trial on its site	Sign up online: 50,000 free tokens, about 625 minutes, no card
Price	Per resolved outcome, such as a resolved conversation or a saved cancellation; rates set by contract, not published	$0.08/min, phone call, AI and standard voice included; $15 a month per number
Unresolved or escalated calls	“In most cases, there’s no charge”	Billed by the minute, in 6-second steps
Calls at once	Not published	No concurrency limits
Channels	Voice, website and app chat, SMS, WhatsApp, Apple Messages, email and ChatGPT	Voice and website chat
Languages	“Over 55 languages”	English and Spanish, switching mid-call
Building an agent	Agent Studio (no code) and an Agent SDK for developers	A no-code flow of questions; test it in Chat before a call goes out
Versions	Tested before new versions are released	Copy or share a campaign as many times as you like
Inbound and outbound calls	Yes	Yes
Transfer to a person	Yes, warm transfer with context	Yes, warm or cold; on a warm transfer the person presses a key to accept
Voicemail on outbound	Handles voicemail and wrong numbers	Detects voicemail and leaves the message you wrote
Booking appointments	Not stated	Google and Microsoft calendars, with an email-code check
Speed	“Low-latency”; no figure published	Reply starts a median 77 ms after the caller’s words arrive as text, live calls, 21–22 October 2026
Security certifications	SOC 2, PCI DSS Level 1, ISO 27001 and others listed	None listed

Sierra from sierra.ai, its channels, voice, Agent Studio and trust pages and its post on outcome-based pricing, read 28 October 2026. “Not stated” means Sierra’s pages do not say.

Per outcome or per minute

Sierra charges for results that both sides agree on up front, such as a resolved support conversation, a saved cancellation or an upsell. Its post on the model says that if a conversation is unresolved or escalated, in most cases there is no charge, and that calls such as routing or greeting can be paid per conversation instead.

Komms bills the minutes of each call, in 6-second steps, at one published rate with the phone call, the AI and a standard voice included. There is nothing to agree before you start, and you can see the price before you talk to anyone.

Which one costs less depends on how many of your calls end in an outcome and what Sierra’s contract rate is, and that rate is not public.

Komms pricing:

$0.08 a minute, phone call included
$15/mo per phone number

Also compared: Sierra alternatives · PolyAI · Retell · Bland · Vapi

Questions

How much does Sierra AI cost?

Sierra does not publish its prices. It charges per outcome, such as a resolved support conversation or a saved cancellation, at rates set in a contract with its sales team. Komms is $0.08/min with the phone call, the AI and a standard voice included, plus $15 a month per phone number.

What is Sierra's outcome-based pricing?

Sierra charges when its agent achieves a result both sides agree on up front, such as a resolved conversation, a saved cancellation or an upsell. Sierra says that if a conversation is unresolved or escalated, in most cases there is no charge. Komms charges per minute of call instead, in 6-second steps.

Does Sierra have a free trial?

Sierra's site shows no sign-up form or free trial; you start through its sales team. Komms gives new accounts 50,000 free tokens, about 625 minutes, with no card.

Is Komms cheaper than Sierra?

Published prices cannot settle it, because Sierra's rates are set by contract and not published. Komms is $0.08/min all in, with the phone call, the AI and a standard voice. Ask Sierra for its rate per outcome and compare it with your minutes per outcome on Komms.

Is there a Sierra alternative you can sign up for online?

Komms: sign up online with 50,000 free tokens and no card, and build an agent as a flow of questions with no code. It handles inbound and outbound calls and website chat, in English and Spanish, with transfer to a person. See the full list of Sierra alternatives for others.

Komms · AI IVR

Replace your phone menu with an AI agent

No more “press 1 for sales.” A Komms agent answers every call, asks what the caller needs, and handles it the way a live agent would: answers the question, screens and qualifies the caller, takes a message or transfers to the right person.

Start free How Komms works

Phone menu vs. Komms

	Phone menu (IVR)	Komms
How callers say what they want	Press keys from a list	Say it in their own words
A question nobody planned for	No option for it	Answers from your documents, or takes a message
Screening and qualifying	Not possible	Asks your questions and checks the answers
Getting to a person	Press 0 and wait	Transfers to the right person or team, with the details
Languages	One menu per language	English and Spanish

What the agent does on each call

Answers every call: Day or night, every call at once. No hold queue for the menu.
Screens callers: Asks who is calling and why, and can check the number against your own systems before going on.
Qualifies callers: Asks your questions one at a time and takes the call down a different path for each answer.
Answers questions: Hours, prices, addresses, policies: from the documents you load.
Takes messages: Name, number and what it is about, read back to the caller, then sent to your inbox, CRM or other software.
Transfers to a person: To the right team or person, and callers can always ask to speak to someone.

Ring your team anywhere, with Kurrent

Pair Komms with Kurrent to route calls the agent passes on: to a phone, a softphone or straight to a browser, with a call button on your website that rings through the browser too. What is WebRTC?

What it costs

What	Amount	Cost a month
Talk time	3,000 calls × 1 min = 3,000 minutes at $0.08	$240
Phone number	1 × $15 a month	$15
Total	The phone call, the AI model and a standard voice are inside the $0.08, billed in 6-second steps	$255

New accounts get 50,000 free tokens first (about 625 minutes). Contact us: lower prices may apply at your volume. Full pricing.

More Komms setups: AI receptionist · AI answering service · AI call center · AI voice agent · What is an IVR?

Questions

What is an AI IVR?: An AI IVR answers a phone line with an AI agent instead of a keypad menu. The caller says what they need in their own words, and the agent answers, asks follow-up questions or sends the call to the right person. Komms does this for $0.08 a minute with the phone call included.
Can an AI agent replace a phone menu?: Yes. A Komms agent answers every call, works out what the caller needs, answers from your documents, screens and qualifies callers, takes messages and transfers to a person or team. Callers do not press keys or sit through a list of options.
How much does it cost to replace an IVR with Komms?: $0.08 a minute with the phone call, the AI and a standard voice included, plus $15 a month per phone number. 3,000 calls a month at one minute each is about $255. There is no setup fee and no per-agent fee.
Can Komms send calls to my team's computers?: Yes, with Kurrent. Kurrent routes each call to a phone, a softphone or a browser, and your website can have a call button that rings through the browser too. Komms can answer first and transfer to the right person.
Does Komms work with my existing phone number?: Yes. Forward your number to Komms, or move the number over. Forwarding can be for all calls, when busy, or when no one answers.