Side-by-side comparison · Sales & Customer Support

Retell AI vs Zendesk

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Best overall

Retell AI

4.1

From About $0.07–$0.31/min

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Zendesk

3.6

From $19/agent/mo

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Comparing 2 tools. Add one more if you like.

At a glance

Retell AI4.1

Best overallBest valueEasiest to use

Pick it if: Service businesses and agencies that want an AI receptionist or phone agent without hiring developers.

Zendesk3.6

Pick it if: Established support teams, especially those handling phone, chat and email at volume across one or more brands.

Overview

Attribute	Retell AI	Zendesk
In one line	AI phone agents that answer calls, book appointments and make outbound calls.	Helpdesk for support teams, with AI agents that answer customers and a copilot for staff.
Pricing model	Paid	Paid
Starting price	About $0.07–$0.31/min	$19/agent/mo
Free plan	No	No
Works with Claude Code	Yes	Yes

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

Attribute	Retell AI	Zendesk
Overall rating	4.1Winner	3.6
Ease of useHow quickly someone non-technical gets value from it.	3.5	3.0
FeaturesHow completely it covers its own job, and how well the pieces fit together.	4.5	4.5
Output qualityHow good the results are before you fix them.	4.5	3.5
Value for moneyWhat you get for the price, including the free plan.	4.0	3.0
Speed & reliabilityHow fast it is and how often it falls over.	4.0	4.0

Feature comparison

A tick means it does this today. A dash means we haven't checked.

Attribute	Retell AI	Zendesk
Access & platform
Free plan	No	No
Mobile app	–	Yes
Desktop app	–	–
Browser extension	–	–
API access	Yes	Yes
Teams & business
Team workspace	Yes	Yes
Enterprise plan or SSO	Yes	Yes
Connects to other apps	Yes	Yes
Open source or self-hosted	No	No
AI abilities
Works with your files	Yes	Yes
Understands images	–	–
Makes images	No	No
Makes video	No	No
Writes code	–	No
Runs agents or automations	Yes	Yes
Learns your brand or style	–	–
Works in many languages	Yes	Yes
Capabilities score	7/ 17	8/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

Attribute	Retell AI	Zendesk
Plans	Pay as you goOur pick About $0.07–$0.31/min Most small businesses and agencies.	Support Team $19/agent/mo billed yearly, or $25 monthly Small teams that only need email ticketing.
	Enterprise Custom High call volumes and compliance needs.	Suite Team $55/agent/mo billed yearly, or $69 monthly Teams adding live chat, phone and AI agents.
		Suite ProfessionalOur pick $115/agent/mo billed yearly, or $149 monthly Growing support teams that need skills-based routing and better AI tools.
		Suite Enterprise Custom Large or regulated support operations.
Which plan to pick	Start on pay as you go with the free credits, build one agent for your most common call and test it on your own phone. Talk to sales only once you run thousands of minutes a month.	Support Team only makes sense for email-only teams. Most businesses wanting AI and live chat should trial Suite Professional (the trial includes Copilot), then work out how many AI resolutions they will use, because extra resolutions at about $2 each can cost more than the seats.

Key features

Attribute	Retell AI	Zendesk
Standout features	Phone agents Flow builder Appointment booking Knowledge base Batch calling Call analysis	Ticketing AI agents Copilot Omnichannel routing Voice and messaging Help centre and reports

Pros and cons

Attribute	Retell AI	Zendesk
Pros	Natural voices and quick responses Visual builder makes it usable for non-developers Pay per minute with no platform fee Strong reviews from small businesses and agencies	Covers every support channel, including phone, in one product Mature routing, service targets and reporting for big teams Huge marketplace of integrations and apps AI agents and Copilot are built in rather than bolted on from a third party Public API that developers know well
Cons	Per-minute cost varies a lot with your model and voice choices Takes testing to handle real callers reliably Some users want more voice and customisation options	Costs climb quickly with agents, add-ons and per-resolution AI charges Users say the meaning of an automated resolution and the bill are hard to predict Setup and admin take real time; small teams find it heavy Frequent complaints about slow, scripted help from Zendesk's own support Its AI agent is generally rated below Intercom's Fin for answer quality

Who each one is for

Attribute	Retell AI	Zendesk
Best for	AI receptionist for a small business Booking appointments by phone Answering after-hours and overflow calls Outbound reminder and follow-up calls	Ticketing for a team of support agents Phone, chat and email support in one place Routing tickets by skill, language or priority Support reporting and service targets Multi-brand customer service
You'll find it used by	Small business owners Clinics Voice AI agencies Customer service teams Developers	Support teams Contact centres Retail and ecommerce Software companies IT help desks

Questions people ask

Which is better, Retell AI or Zendesk?

Retell AI scores highest overall in our ratings (Retell AI 4.1/5 and Zendesk 3.6/5). Retell AI is best for AI receptionist for a small business and booking appointments by phone. Zendesk is best for ticketing for a team of support agents and Phone, chat and email support in one place.

Which is cheaper, Retell AI or Zendesk?

Retell AI: There's no free plan. Paid plans start at About $0.07–$0.31/min. Zendesk: There's no free plan. Paid plans start at $19/agent/mo.

Which is easier to use, Retell AI or Zendesk?

Retell AI rates highest for ease of use in our scores. Service businesses and agencies that want an AI receptionist or phone agent without hiring developers.

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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