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Side-by-side comparison · Sales & Customer Support

Clay vs Hiver vs Retell AI

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

Clay

3.7

From From $167/mo

Hiver

3.9

From $25/user/mo

Best overall

Retell AI

4.1

From About $0.07–$0.31/min

Comparing 3 tools, the maximum.

At a glance

Clay3.7

Pick it if: Growth marketers, sales ops people and agencies who build targeted lead lists and personalised outbound.

Easiest to use

Pick it if: Small and mid-sized teams who answer customers or suppliers from a shared Gmail address and want structure without leaving Gmail.

Best overall

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

Overview

AttributeClayHiverRetell AI
In one lineBuilds and enriches lead lists from 100+ data sources, with an AI agent for web research.Shared inbox and helpdesk that runs inside Gmail, with AI that drafts and answers replies.AI phone agents that answer calls, book appointments and make outbound calls.
Pricing modelFreemiumPaidPaid
Starting priceFrom $167/mo$25/user/moAbout $0.07–$0.31/min
Free plan Yes No No
Works with Claude Code No Yes Yes

Rating breakdown

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

AttributeClayHiverRetell AI
Overall rating3.73.94.1Winner
Ease of useHow quickly someone non-technical gets value from it.
2.5
4.5
3.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.
5.0
4.0
4.5
Output qualityHow good the results are before you fix them.
4.5
3.5
4.5
Value for moneyWhat you get for the price, including the free plan.
3.0
4.0
4.0
Speed & reliabilityHow fast it is and how often it falls over.
3.5
3.5
4.0

Feature comparison

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

AttributeClayHiverRetell AI
Access & platform
Free plan Yes No No
Mobile app– Yes–
Desktop app–––
Browser extension Yes Yes–
API access Yes Yes Yes
Teams & business
Team workspace Yes Yes Yes
Enterprise plan or SSO Yes Yes Yes
Connects to other apps Yes Yes Yes
Open source or self-hosted No No No
AI abilities
Works with your files Yes– Yes
Understands images–––
Makes images No No No
Makes video No No No
Writes code– No–
Runs agents or automations Yes Yes Yes
Learns your brand or style–––
Works in many languages–– Yes
Capabilities score8/ 177/ 177/ 17

Pricing

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

AttributeClayHiverRetell AI
Plans

Free

Free

Learning Clay and small tests.

Growth

$25/user/mo billed yearly, or $35 monthly

Small teams running one or two shared inboxes.

Pay as you goOur pick

About $0.07–$0.31/min

Most small businesses and agencies.

LaunchOur pick

From $167/mo, less billed yearly

Founders and small teams building outbound lists.

ProOur pick

$55/user/mo billed yearly, or $65 monthly

Support teams that need targets and connected tools.

Enterprise

Custom

High call volumes and compliance needs.

Growth

From $446/mo, less billed yearly

Teams syncing Clay with their CRM.

Elite

$85/user/mo billed yearly, or $95 monthly

Larger teams wanting AI quality checks and tighter security.

Enterprise

Custom

Large teams needing SSO and controls.

Which plan to pickLearn on Free, then move to Launch when you are ready to run real campaigns. Only take Growth if you need CRM sync or the API. Set credit budgets on every table.Growth is enough for a small team that just needs a tidy shared inbox with AI help. Choose Pro if you need response-time targets, CRM or Shopify data next to each email, or the API. Voice is an add-on at $30 per seat.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.

Key features

AttributeClayHiverRetell AI
Standout features
  • Waterfall enrichment
  • Claygent
  • Signals
  • AI writing
  • CRM sync
  • Sequencer
  • Shared inbox in Gmail
  • AI agents
  • AI copilot
  • Collaboration
  • Hiver Omni
  • Phone agents
  • Flow builder
  • Appointment booking
  • Knowledge base
  • Batch calling
  • Call analysis

Pros and cons

AttributeClayHiverRetell AI
Pros
  • Finds more emails and numbers than any one database
  • Claygent can research almost anything about a company
  • Very flexible: build exactly the list you need
  • Useful free plan for learning
  • Almost no training: the team keeps working in Gmail
  • AI agents and copilot included from the cheapest plan
  • Good for non-support teams like finance and HR
  • Cheaper than Zendesk or Intercom for small teams
  • 24/7 support on every plan
  • 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
Cons
  • Steep learning curve for non-technical users
  • Credits and actions are easy to burn, with no sandbox for testing
  • Two-currency pricing makes the bill hard to predict
  • Frequent pricing changes in 2026 confused existing customers
  • Gmail add-on can be slow, lose connection or log users out
  • Search and formatting are weaker than in a full helpdesk
  • Key integrations and the API only start on Pro
  • Seats sold in blocks, with a two-seat minimum
  • 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

Who each one is for

AttributeClayHiverRetell AI
Best for
  • Building niche lead lists
  • Finding emails and phone numbers from many sources
  • AI research on each prospect
  • Keeping CRM data enriched
  • Running support@ or info@ as a team
  • Assigning and tracking customer emails
  • Finance and HR shared mailboxes
  • AI-drafted email replies
  • Teams that want to stay in Gmail
  • AI receptionist for a small business
  • Booking appointments by phone
  • Answering after-hours and overflow calls
  • Outbound reminder and follow-up calls
You'll find it used by
  • Growth marketers
  • Sales ops
  • Outbound agencies
  • Founders
  • Recruiters
  • Customer support teams
  • Finance and accounts teams
  • Operations teams
  • Logistics companies
  • Agencies
  • Small business owners
  • Clinics
  • Voice AI agencies
  • Customer service teams
  • Developers

Questions people ask

Which is better, Clay, Hiver or Retell AI?

Retell AI scores highest overall in our ratings (Clay 3.7/5, Hiver 3.9/5 and Retell AI 4.1/5). Clay is best for building niche lead lists and finding emails and phone numbers from many sources. Hiver is best for running support@ or info@ as a team and assigning and tracking customer emails. Retell AI is best for AI receptionist for a small business and booking appointments by phone.

Which is cheaper, Clay, Hiver or Retell AI?

Clay: There's a free plan, and paid plans start at From $167/mo. Hiver: There's no free plan. Paid plans start at $25/user/mo. Retell AI: There's no free plan. Paid plans start at About $0.07–$0.31/min.

Which is easier to use, Clay, Hiver or Retell AI?

Hiver rates highest for ease of use in our scores. Small and mid-sized teams who answer customers or suppliers from a shared Gmail address and want structure without leaving Gmail.

How we compare

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

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