AI Phone Answering Service Research Highlights (2026)

The joint research highlights across ten AI answering services

How often each service completes the caller’s task

Service	Answer accuracy	Call resolution	Booking success	Transfer success
Ring Jenny	97.3%	92.7%	95.3%	95.7%
Smith.ai	96.6%	91.7%	93.3%	97.7%
Upfirst	95.3%	89.8%	92.7%	93.7%
Rosie AI	95.0%	88.6%	90.0%	91.7%
RingCentral AI Receptionist	96.0%	87.8%	90.3%	93.0%
Goodcall	93.9%	86.8%	87.0%	90.0%
Sophiie AI	95.3%	86.4%	92.3%	93.0%
My AI Front Desk	93.6%	85.9%	87.7%	88.7%
Dialzara	92.3%	84.3%	85.0%	87.0%
Aircall AI Voice Agent	95.3%	83.9%	89.3%	92.3%

Source: joint research by LunaCal and RingJenny.com on AI answering services, published October 29, 2026. These are simulated task outcomes. Overall resolution uses 2,700 scenarios per platform; informational accuracy uses 900.

Ring Jenny’s 92.7% resolution rate is followed by Smith.ai at 91.7% and Upfirst at 89.8%. Booking success reaches 95.3% for Ring Jenny. For transfers, Smith.ai’s 97.7% is the highest result. A business that primarily needs human connections should examine the transfer measure alongside overall resolution.

Usability, conversation speed, and administrative return

Service	Ease of use /10	Median reply delay	100-call monthly cost (USD)	First-year ROI
Ring Jenny	9.4	0.82 sec	$109.00	113%
Smith.ai	8.7	1.01 sec	$212.50	8%
Upfirst	9.1	0.93 sec	$69.95	221%
Rosie AI	9.0	1.09 sec	$149.00	49%
RingCentral AI Receptionist	8.1	0.88 sec	$149.00	47%
Goodcall	8.4	1.14 sec	$79.00	175%
Sophiie AI	7.7	1.17 sec	Not established	Not calculated
My AI Front Desk	8.0	1.21 sec	About $119.00	About 80%
Dialzara	8.3	1.34 sec	Not established	Not calculated
Aircall AI Voice Agent	7.8	0.98 sec	$122.50 AI usage only	Not calculated

The joint research’s ease-of-use and timing figures belong to its scenario framework. Financial results use the October 29, 2026 price assumptions, expressed in US dollars, for 100 three-minute calls per month. ROI values five administrative minutes released per resolved request at $30 an hour.

The cost column describes the workload used in the research, rather than the lowest plan offered by a provider. My AI Front Desk’s estimate assumes included overage credits remain available for voice. Aircall’s figure covers AI usage without a complete phone-system bill; Sophiie and Dialzara lack comparable total-cost estimates in this scenario. “Not calculated” means the research does not establish a percentage ROI for that configuration.

A resolved request is more useful than an answered call

Picking up the phone is a coverage measure. Resolution asks whether the receptionist finishes the job that brought the caller to the business. That difference is easy to miss in a demonstration with a polished greeting and a simple question.

For a customer asking about a service area, a correct location answer completes the request. For someone seeking an appointment, the job includes finding an available slot and creating the event. For a person who needs staff assistance, success depends on reaching the intended recipient or following an agreed fallback.

The research allocates nine types of scenario to each platform. These include ordinary questions, ambiguity, bookings, changes to an appointment, contact capture, routing, noisy conversations, and interruptions. Giving each service the same set of tasks makes the reported resolution figures easier to interpret than unrelated product demonstrations.

In your own evaluation, label outcomes as complete, partial, or failed. A complete callback request needs usable contact information and a delivered message. An appointment discussed without an event is partial. A message sent to the wrong destination is a failed action even if the conversation sounds smooth.

Accuracy depends on the information the business provides

The informational test covers hours, services and policies, and ambiguous questions. Ring Jenny records 876 correct answers out of 900, or 97.3%. Smith.ai records 869, or 96.6%, and RingCentral AI Receptionist records 864, or 96.0%.

The business information needs clear boundaries. If prices vary by job size, the receptionist should know whether it can quote a range, ask qualifying questions, or request a staff callback. If service areas vary by location, it needs the right rule for the branch involved.

Include questions without a documented answer in a trial. Check whether the system asks for clarification, offers a callback, or routes the caller. An unsupported answer can be more disruptive than an honest escalation because staff must later correct what the customer was promised.

Assign someone to maintain the information after launch. Holiday hours, staff availability, revised prices, and temporary service restrictions can change the answer a caller should receive. Test a correction after it is entered so that the maintenance process produces the intended result.

For appointment businesses, check the event after the conversation

The caller’s experience and the resulting calendar record must agree. A booking evaluation should check the service type, duration, time zone, staff assignment, contact details, and event creation. When the caller changes their preference, the final record should reflect the latest choice.

A text containing a scheduling link is a useful handoff to self-service, but it is a different outcome from direct booking during the call. Counting both as completed appointments hides the extra action the customer still needs to take.

Upfirst’s appointment-setting documentation describes real-time calendar connectivity. The practical test is whether the service can use your calendar’s rules and create the correct event. Check buffers, staff availability, and what happens when no suitable slot is available.

Rescheduling deserves its own test. Ask to move an existing appointment, change the requested service, or switch to another staff member. Confirm that the old arrangement is handled correctly and that staff and the customer receive consistent information.

Plan the human handoff before the first customer calls

Write down the situations that require staff: a caller requesting a person, an unresolved complaint, a question outside the approved information, or a request the system cannot complete. Define the destination, the hours when someone can answer, and the next step if nobody responds.

A warm transfer can give the employee context before the caller connects. A direct transfer may simply route the call. Taking a message creates a callback task. Establish which of these outcomes your business needs and how the provider charges for it.

Smith.ai’s AI Receptionist combines intake capabilities with access to human support. Staffed provider assistance and a transfer to your own team involve different people and operating arrangements. Ask which path is included in the proposed service and what information accompanies the handoff.

Test the fallback destination too. If your employee is unavailable, the receptionist should follow the intended message-taking or alternate-routing rule. The outcome should give both the caller and the responsible staff member a clear next step.

Ease of use includes the changes you make every week

Ring Jenny’s ease-of-use score is 9.4/10 in the joint research, followed by Upfirst at 9.1/10 and Rosie AI at 9.0/10. The criteria include configuration, business information, calendar connections, routing instructions, and routine administration.

Look beyond activation when assessing those tasks. Ask the person who will operate the service to change opening hours, update a price, adjust an escalation number, and locate a booking that needs attention. Track whether they can complete each change without specialist support.

Multi-location businesses should check how rules stay separated. The wrong location’s opening time or calendar can create a bad outcome from otherwise correct information. Make a call that mentions a branch explicitly and another that leaves the location ambiguous.

Reviewing exceptions is part of the job. A useful operating process makes it clear which calls need staff attention, who owns the follow-up, and whether the underlying information or routing rule needs correction.

The longest pauses can matter as much as the typical reply

The joint research reports a modeled median reply delay of 0.82 seconds for Ring Jenny and 1.34 seconds for Dialzara. The corresponding 95th-percentile figures are 1.92 and 3.28 seconds. The median describes the typical turn; the 95th percentile captures the slower end of the scenario distribution.

During a trial, include actions that require a lookup rather than only questions with short answers. A calendar search or routing decision can have a different timing pattern from a greeting. Listen for unexplained silence, repeated prompts, and responses that arrive after the caller has moved on.

Also interrupt a response and correct an earlier detail. The receptionist needs to stop, understand the change, and continue from the updated information. Fast replies are useful when they move the requested task forward.

Why the highest resolution rate does not automatically mean the highest ROI

ROI compares a benefit with the amount spent to obtain it. Under the joint research’s assumptions, each resolved call releases five administrative minutes. At $30 per hour, that represents $2.50 of staff capacity.

Monthly administrative value = calls per month × resolved share × $2.50.

First-year administrative ROI = (annual time value − annual service spend) ÷ annual service spend × 100.

Ring Jenny’s unrounded resolution count produces approximately $231.76 of administrative value per month, the highest in the study. Its $109 monthly cost assumption produces about $1,473.11 of annual net time value and 113% ROI. Upfirst’s lower $69.95 monthly cost gives it 221% ROI, while Goodcall’s $79 scenario gives it 175%.

The amount of administrative work handled and the percentage return answer different budget questions. Use both, and add your own follow-up labor. If staff still review every message or repair calendar entries, subtract that work from the time you expect the service to release.

How many completed requests cover the subscription?

At $2.50 of administrative value per resolved request, a $109 monthly charge needs about 44 completed requests to be covered in time value. Applying the research’s resolution assumption corresponds to roughly 48 incoming calls.

That break-even point changes with the value of staff time and the work saved on each request. Five minutes is the research assumption, not the length of every real administrative task. Measure the manual work before and after introducing the service, including corrections and supervision.

Revenue requires a separate calculation. To estimate it, track attributable bookings or jobs and their contribution after delivery costs. Avoid treating every answered call as a new sale or counting the same staff-time benefit twice.

Use your call pattern to compare the bill

Two businesses with 100 calls can have different costs if one averages two minutes and the other six. Repeat callers also matter when charging is based on unique customers. Put the same workload through every provider’s pricing rules.

Calls: establish how short calls, spam, abandoned calls, and repeat attempts are counted.
Minutes: check rounding and whether transfer, hold, or other time contributes to the bill.
Customers: confirm the definition of a unique caller and how returning customers are identified.
Shared credits: check whether voice, SMS, and chat draw from one balance.
Required services: include phone-system licenses, numbers, setup, integrations, and paid escalation when applicable.

Calculate an expected month and a busy month. Then connect the bill to the completed requests rather than only the number of calls answered. This makes overage costs and unfinished staff work visible in the same budget.

Turn the research highlights into a shortlist

Start with the outcome your callers need most. An appointment business should prioritize correct calendar actions; a service team may prioritize accurate intake and routing; a multi-location operator needs dependable location selection and information.

Choose the two or three services that match that task.
Give each the same information, calendar rules, and destinations.
Use a repeatable set of ordinary, changed, ambiguous, and interrupted requests.
Inspect the resulting message, event, or connection.
Review the likely bill and the staff follow-up required.
Assign ownership for information updates, exceptions, retention settings, and fallback routing.

The full RingJenny edition of the joint research by LunaCal and RingJenny.com provides additional context. The LunaCal guide to the joint research includes worked cost-per-resolution and time-saving calculations. Full scenario definitions and original tables appear in the joint research methodology by LunaCal and RingJenny.com.

Questions about the research highlights

Who is the research by?

This is joint research by LunaCal and RingJenny.com. The published framework covers ten AI answering services, 27,000 simulated call scenarios, and modeled buyer and product evaluations.

What are the main findings?

Ring Jenny leads simulated call resolution at 92.7% and booking success at 95.3%, and has the highest framework ease-of-use score at 9.4/10. Smith.ai leads transfer success at 97.7%. Upfirst leads modeled administrative ROI at 221% in the specified workload.

Are the table prices starting prices?

No. They are the research’s US-dollar cost estimates for 100 three-minute calls a month, using its October 29, 2026 price assumptions. Allowances, overages, required features, and currencies affect the cost of a different configuration.

Does the research describe live customer-call measurements?

The figures describe simulated scenarios and modeled evaluations. Each service receives the same scenario allocation, with separate definitions for informational correctness, completion, booking, and transfers.

Which result should matter most when choosing a service?

Start with the task the business needs completed and the plan that supports it. Then weigh the resulting staff workload, usability, and full cost. Check the actual message, booking, or transfer during a trial.

Can a business keep its current phone number?

Call forwarding may let a receptionist answer calls made to an existing number. Confirm the arrangement with the phone provider, including missed-call or after-hours behavior and any forwarding charges.

AI Phone Answering Service Research Highlights: Accuracy, Cost, and ROI

Introduction