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CRM · head to head

EspoCRM vs Klaus

EspoCRM logo

EspoCRM

CRM

AGPL open source CRM in PHP that you can self-host free or buy as cloud with seat minimums

From
Free
Free plan
Yes
Full reviewWebsite
Klaus logo

Klaus

Customer Support

AI-powered quality management for support teams

From
$50/month
Free plan
No
Full reviewWebsite

The short version

  • Only EspoCRM has a free tier, so it costs nothing to try first.
  • Each has a real cost: EspoCRM the AGPLv3 licence obliges you to publish source modifications if you make the modified software available over a network, which blocks resellers who want to offer a customised hosted version without opening their code.; Klaus no longer available as standalone product after Zendesk acquisition
  • They diverge on capability: EspoCRM covers Entity manager, Klaus covers AI-powered QA.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which EspoCRM and Klaus actually diverge.

Attributes where EspoCRM and Klaus differ
AttributeEspoCRMKlaus
Starting priceFree$50/month
Pricing modelPer user per monthUnknown
Free tierYesNo
PlatformsWeb, Linux, Docker, iOS, AndroidWeb
CategoryCRMCustomer Support
FoundedUnknown2017

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 EspoCRM

  • Entity manager
  • Dynamic logic
  • Email integration
  • Sales pipeline
  • Case management
  • Reports and dashboards
  • Workflow automation
  • REST API

Only in Klaus

  • AI-powered QA
  • Conversation reviews
  • Scorecards
  • Coaching
  • Performance analytics
  • Calibration
  • Zendesk
  • Intercom

What people use each for

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

EspoCRM

  • A small business that wants a CRM on its own hosting with no per-seat fee and no vendor holding its customer datanot Klaus
  • A public sector or healthcare team with data residency rules that rule out US-hosted commercial CRMnot Klaus
  • A developer or agency needing a CRM whose data model can be extended into a bespoke entity structure through configurationnot Klaus
  • An organisation with many light users, where self-hosting avoids paying seat prices for people who open the CRM twice a monthnot Klaus

Klaus

  • Quality assurancenot EspoCRM
  • Agent coachingnot EspoCRM
  • Performance trackingnot EspoCRM

Where each one falls short

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

EspoCRM

  • The AGPLv3 licence obliges you to publish source modifications if you make the modified software available over a network, which blocks resellers who want to offer a customised hosted version without opening their code.
  • Cloud plans carry seat minimums of three, five and ten users, so a two-person consultancy pays for three seats and a small team wanting the Ultimate features pays for ten.
  • Record ceilings are real on the cheaper cloud tiers, with Basic capped at 100,000 records, and hitting the cap means a tier upgrade rather than a small overage charge.
  • Marketing automation, sequences and native telephony are thin compared with HubSpot or Zoho, so most deployments end up wiring in a separate mailing tool and a separate dialler.
  • Self-hosting shifts the entire cost to your own team: PHP version upgrades, database backups and security patching are yours, and a neglected instance becomes an internet-facing liability holding your customer list.

Klaus

  • No longer available as standalone product after Zendesk acquisition
  • Requires separate Zendesk subscription (not included in base plan)
  • Cannot be used with non-Zendesk help desk systems

Pricing, plan by plan

EspoCRM

Free
  • Self-hostedFree
    • AGPLv3 licence, no fee
    • Runs on PHP with MySQL or MariaDB
    • Advanced Pack, Sales Pack and other extensions sold separately as one-off purchases
  • Cloud Basic$15/month
    • Three-user minimum
    • 3GB storage per user
    • Up to 100,000 records
  • Cloud Enterprise$25/month
    • Five-user minimum
    • 10GB storage per user
    • Up to 10 million records, extendable for a fee
  • Cloud Ultimate$69/month
    • Ten-user minimum
    • 400GB total storage
    • Unlimited records

Klaus

$50/month
  • Workforce Engagement Bundle$50/month
    • Includes Zendesk QA (formerly Klaus)
    • Requires base Zendesk Support or Suite plan
    • 100% conversation review with AI

Which should you pick?

Choose EspoCRM if

  • You need entity manager.
  • You want to start without paying.
  • You work on Web, Linux, Docker, iOS, Android.
  • You also want dynamic logic.
EspoCRM review

Choose Klaus if

  • You need ai-powered qa.
  • You also want conversation reviews.
Klaus review

Questions people ask

Is EspoCRM or Klaus better?
Neither clearly leads. EspoCRM starts at Free and Klaus at $50/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, EspoCRM or Klaus?
EspoCRM has a free tier; the other does not. Paid plans start at Free for EspoCRM and $50/month for Klaus.
Does EspoCRM or Klaus run on more platforms?
EspoCRM runs on Web, Linux, Docker, iOS, Android. Klaus runs on Web.
Can I use EspoCRM for free?
Yes. EspoCRM has a free tier, so you can try it without paying. Klaus starts at $50/month.
What is EspoCRM best used for?
EspoCRM is most often used for a small business that wants a crm on its own hosting with no per-seat fee and no vendor holding its customer data, a public sector or healthcare team with data residency rules that rule out us-hosted commercial crm, a developer or agency needing a crm whose data model can be extended into a bespoke entity structure through configuration, an organisation with many light users, where self-hosting avoids paying seat prices for people who open the crm twice a month. Of those, a small business that wants a crm on its own hosting with no per-seat fee and no vendor holding its customer data and a public sector or healthcare team with data residency rules that rule out us-hosted commercial crm are not what Klaus is typically brought in for.
What can EspoCRM do that Klaus cannot?
EspoCRM covers Entity manager, Dynamic logic, Email integration, Sales pipeline. Klaus covers AI-powered QA, Conversation reviews, Scorecards, Coaching.

Answered from the vendors’ own pages

EspoCRM: Is the self-hosted version really full featured?

The core CRM is, but several paid extension packs including Advanced Pack for reports and BPM are sold separately as one-off purchases and are not in the free download.

Klaus: Is Klaus still available as a standalone product?

No. Klaus was acquired by Zendesk in February 2024 and is now integrated into Zendesk as Zendesk QA, requiring a paid Zendesk plan as the base.

Source
EspoCRM: What are the cloud seat minimums?

Three users on Basic, five on Enterprise and ten on Ultimate, so the advertised per-user rate is not the smallest bill you can pay.

Klaus: What QA features does Klaus provide?

Klaus automatically reviews 100% of customer interactions using AI, provides immediate performance insights, reduces QA time by 80%, and improves CSAT scores through targeted coaching.

Source
EspoCRM: What does it need to run?

PHP, MySQL or MariaDB and a web server. It installs on ordinary shared hosting or a small VPS, which is unusual for a modern CRM.

EspoCRM: Can I move from cloud to self-hosted later?

Yes. EspoCRM states customers own their database and data files, so an export and reinstall is possible, though you take on all maintenance when you do.

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