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CRM · head to head

Apollo.io vs Calabrio ONE

Apollo.io logo

Apollo.io

CRM

Revenue intelligence platform

From
Free
Free plan
Yes
Full reviewWebsite
Calabrio ONE logo

Calabrio ONE

Customer Support

Workforce management, quality and analytics suite for contact centres, now owned by Verint

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Apollo.io has a free tier, so it costs nothing to try first.
  • Each has a real cost: Apollo.io everything is metered in credits, and the free Starter plan runs on them too, so prospecting volume is capped rather than the feature set; Calabrio ONE ownership changed in November 2025 when Thoma Bravo took Verint private and merged it with Calabrio, so the product is no longer the independent alternative to Verint that most shortlists put it on for, and roadmap priorities across two overlapping suites will be decided by one company.
  • They diverge on capability: Apollo.io covers Contact database, Calabrio ONE covers Intelligent forecasting.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Apollo.io and Calabrio ONE actually diverge.

Attributes where Apollo.io and Calabrio ONE differ
AttributeApollo.ioCalabrio ONE
Starting priceFreeOn request
Pricing modelsubscriptionquote
Free tierYesNo
PlatformsWebWeb, iOS, Android
CategoryCRMCustomer Support
Founded2020Unknown

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Apollo.io

  • Contact database
  • Email finder
  • Lead search
  • Automation
  • Engagement tracking
  • Reporting
  • Salesforce
  • HubSpot

Only in Calabrio ONE

  • Intelligent forecasting
  • Automated scheduling
  • Intraday optimisation
  • Real-time adherence
  • Agent self-service
  • Call and screen recording
  • Quality management
  • Speech and desktop analytics

What people use each for

The jobs each tool is most often brought in to do.

Apollo.io

  • Sales prospecting and lead generationnot Calabrio ONE
  • Contact database management for sales teamsnot Calabrio ONE
  • Email outreach and workflow automationnot Calabrio ONE

Calabrio ONE

  • A 1,200-seat contact centre on Amazon Connect needing forecasting and adherence that the native scheduling tools do not providenot Apollo.io
  • A multi-site operation replacing spreadsheet rostering that no longer copes with skills-based routing and part-time shift patternsnot Apollo.io
  • A retailer forecasting seasonal contact volume across voice, chat and email to decide temporary hiring numbers months aheadnot Apollo.io
  • A compliance-bound centre needing call and screen recording with retention and redaction controls independent of its telephony vendornot Apollo.io

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Apollo.io

  • Everything is metered in credits, and the free Starter plan runs on them too, so prospecting volume is capped rather than the feature set
  • Plans described as unlimited are capped in the fair use policy at 10,000 credits a month for non-paying accounts
  • Connecting a mailbox that is not Gmail or Microsoft requires a paid plan
  • How many records can be selected at once varies by tier
  • Running out of credits means buying more rather than waiting for a reset

Calabrio ONE

  • Ownership changed in November 2025 when Thoma Bravo took Verint private and merged it with Calabrio, so the product is no longer the independent alternative to Verint that most shortlists put it on for, and roadmap priorities across two overlapping suites will be decided by one company.
  • The combined business has run substantial layoffs following the buyout, which raises real questions about support responsiveness and module investment that a prospective buyer should press on in contract negotiation.
  • Pricing is quoted per agent per month, commonly cited from around 75 US dollars, with analytics and quality sold as separate modules, so the headline figure understates a full suite deployment considerably.
  • There is no free trial and no self-service tier, meaning evaluating the forecasting engine against your own historical data requires a sales-led proof of concept measured in weeks.
  • The forecasting and scheduling engine assumes an operations team that can configure shift rules, service level targets and skill routing correctly; deployed by a team without that expertise it produces schedules people override manually, which negates the reason to buy it.

Pricing, plan by plan

Apollo.io

Free
  • FreeFree
    • Basic contact search
    • Limited searches
  • Starter$49/month
    • Everything in Free
    • Advanced search
    • Email finder
  • Professional$149/month
    • Everything in Starter
    • Automation
    • Advanced analytics

Calabrio ONE

On request
  • Calabrio ONE$undefined/year
    • Workforce management forecasting and scheduling
    • Real-time adherence
    • Agent self-service and mobile app

Which should you pick?

Choose Apollo.io if

  • You need contact database.
  • You want to start without paying.
  • You also want email finder.
Apollo.io review

Choose Calabrio ONE if

  • You need intelligent forecasting.
  • You work on Web, iOS, Android.
  • You also want automated scheduling.
Calabrio ONE review

Questions people ask

Is Apollo.io or Calabrio ONE better?
Neither clearly leads. Apollo.io starts at Free and Calabrio ONE at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apollo.io or Calabrio ONE?
Apollo.io has a free tier; the other does not. Paid plans start at Free for Apollo.io and On request for Calabrio ONE.
Does Apollo.io or Calabrio ONE run on more platforms?
Apollo.io runs on Web. Calabrio ONE runs on Web, iOS, Android.
Can I use Apollo.io for free?
Yes. Apollo.io has a free tier, so you can try it without paying. Calabrio ONE starts at On request.
What is Apollo.io best used for?
Apollo.io is most often used for sales prospecting and lead generation, contact database management for sales teams, email outreach and workflow automation. Of those, sales prospecting and lead generation and contact database management for sales teams are not what Calabrio ONE is typically brought in for.
What can Apollo.io do that Calabrio ONE cannot?
Apollo.io covers Contact database, Email finder, Lead search, Automation. Calabrio ONE covers Intelligent forecasting, Automated scheduling, Intraday optimisation, Real-time adherence.

Answered from the vendors’ own pages

Apollo.io: Does Apollo offer a free plan?

Yes, Apollo offers a Starter plan that is free forever and includes unlimited email addresses for contacts. Gmail and Microsoft email account linking are available on the free plan with limited third-party email account linking.

Source
Calabrio ONE: Is Calabrio still a separate product from Verint?

It is still sold and supported under the Calabrio name, but the companies merged under Thoma Bravo ownership in November 2025 and calabrio.com now redirects to verint.com.

Apollo.io: How does Apollo's credit system work?

Apollo uses a credit-based system for exporting contact data outside the platform. Free and non-paying accounts have a monthly credit limit of 10,000 credits. Paid accounts receive limits based on their plan pricing, calculated as the lesser of annual commit divided by $0.025 or 1 million credits annually.

Source
Calabrio ONE: Will Calabrio customers be forced to migrate to Verint?

Verint has publicly committed to supporting and enhancing Calabrio solutions with no forced migration. Get that commitment written into your contract term rather than relying on the statement.

Apollo.io: How much do trial plans cost on Apollo?

Apollo trial plans include 50 credits and 5 mobile credits to test paid features at no charge. Trial versions do not support non-Gmail/Microsoft email account linking. Upgrades take effect immediately while downgrades take effect at the end of the billing cycle.

Source
Calabrio ONE: Does it replace my contact centre platform?

No. It sits on top of your CCaaS or telephony platform and handles workforce management, recording and quality.

Calabrio ONE: What does it cost?

Nothing is published. Independent reporting puts the entry point near 75 US dollars per agent per month, rising with quality and analytics modules.

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Related pages

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