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Side-by-side comparison · Sales & Customer Support

Attio vs Decagon 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.

Attio

4.1

From $35/seat/mo

Decagon

3.9

Free to start

Retell AI

4.1

From About $0.07–$0.31/min

Comparing 3 tools, the maximum.

At a glance

Easiest to use

Pick it if: Startups, small teams and founders who want a CRM that keeps itself up to date and bends to how they work.

Pick it if: Large companies with big support teams that want AI to handle most customer chats, emails and calls.

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

Overview

AttributeAttioDecagonRetell AI
In one lineCRM that fills itself in from your email and calendar, with AI agents that research leads.AI agents that answer customer chats, emails and phone calls for large companies.AI phone agents that answer calls, book appointments and make outbound calls.
Pricing modelFreemiumPaidPaid
Starting price$35/seat/moSee websiteAbout $0.07–$0.31/min
Free plan Yes No No
Works with Claude Code Yes No Yes

Rating breakdown

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

AttributeAttioDecagonRetell AI
Overall rating4.13.94.1
Ease of useHow quickly someone non-technical gets value from it.
4.0
3.0
3.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
4.5
4.5
Output qualityHow good the results are before you fix them.
4.0
4.5
4.5
Value for moneyWhat you get for the price, including the free plan.
4.0
3.0
4.0
Speed & reliabilityHow fast it is and how often it falls over.
4.0
4.5
4.0

Feature comparison

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

AttributeAttioDecagonRetell AI
Access & platform
Free plan Yes No No
Mobile app Yes No–
Desktop app– No–
Browser extension Yes No–
API access 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 No–
Runs agents or automations Yes Yes Yes
Learns your brand or style– Yes–
Works in many languages– Yes Yes
Capabilities score8/ 177/ 177/ 17

Pricing

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

AttributeAttioDecagonRetell AI
Plans

Free

Free

Founders and tiny teams getting started.

EnterpriseOur pick

Custom

Large companies with high support volume.

Pay as you goOur pick

About $0.07–$0.31/min

Most small businesses and agencies.

Plus

$35/seat/mo billed yearly, or $44 monthly

Small teams that need private lists and more email.

Enterprise

Custom

High call volumes and compliance needs.

ProOur pick

$79/seat/mo billed yearly, or $99 monthly

Sales teams that call, sequence and report.

Enterprise

Custom, billed yearly

Larger companies with security and admin needs.

Which plan to pickStart free: it's good enough for a founder or a team of three to run their contacts and deals. Plus suits a small team that just needs more room. Go Pro once you want call recording, sequences or proper reporting, and use the 14-day Pro trial to check it's worth it.There's only one way to buy it: book a demo and get a custom quote. It only makes sense once you handle tens of thousands of support conversations a month.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

AttributeAttioDecagonRetell AI
Standout features
  • Builds itself
  • Ask Attio
  • AI agents
  • Shape it your way
  • Workflows and sequences
  • Call Intelligence
  • Chat, email and voice
  • Agent Operating Procedures
  • Real actions
  • Testing and A/B tests
  • Quality checks
  • Customer insights
  • Phone agents
  • Flow builder
  • Appointment booking
  • Knowledge base
  • Batch calling
  • Call analysis

Pros and cons

AttributeAttioDecagonRetell AI
Pros
  • Fills itself in from email and calendar, so it stays up to date
  • A real free plan for up to 3 people
  • Flexible enough to track deals, investors, partners or hiring
  • Clean, quick interface that people actually like using
  • Official Claude connector
  • Takes real actions in customer accounts, not only answers
  • Support teams can change how the agent behaves without engineers
  • Strong testing and quality tools before changes go live
  • Handles chat, email and phone in one agent
  • Big-name customers report high resolution rates
  • 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
  • AI features run on credits, and heavy users need to buy more
  • Call recording and sequences only on Pro
  • The free and Plus plans cap how many emails you can send
  • The flexibility means some setup thinking before it fits
  • Large companies only, with no public pricing, trial or self-serve plan
  • Contracts are reported to start well above $100,000 a year
  • Setup takes weeks and needs your systems connected
  • Most performance figures come from Decagon and its customers
  • 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

AttributeAttioDecagonRetell AI
Best for
  • A CRM that fills itself in from email and calendar
  • Startups tracking customers, investors and partners in one place
  • Researching and scoring leads with AI
  • Teams that want to design their own CRM
  • Automating support at a large consumer brand
  • AI agents that take real actions in customer accounts
  • Answering phone calls with AI in many languages
  • Support teams that want to change the AI without engineers
  • 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
  • Startups
  • Founders
  • Sales teams
  • Investors
  • Agencies
  • Large consumer brands
  • Fintech companies
  • Travel companies
  • Enterprise support teams
  • Small business owners
  • Clinics
  • Voice AI agencies
  • Customer service teams
  • Developers

Questions people ask

Which is better, Attio, Decagon or Retell AI?

They tie on our overall rating (Attio 4.1/5, Decagon 3.9/5 and Retell AI 4.1/5). Attio is best for A CRM that fills itself in from email and calendar and startups tracking customers, investors and partners in one place. Decagon is best for automating support at a large consumer brand and AI agents that take real actions in customer accounts. Retell AI is best for AI receptionist for a small business and booking appointments by phone.

Which is cheaper, Attio, Decagon or Retell AI?

Attio: There's a free plan, and paid plans start at $35/seat/mo. Decagon: Pricing isn't published; check the vendor's site for a quote. Retell AI: There's no free plan. Paid plans start at About $0.07–$0.31/min.

Which is easier to use, Attio, Decagon or Retell AI?

Attio rates highest for ease of use in our scores. Startups, small teams and founders who want a CRM that keeps itself up to date and bends to how they work.

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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