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Developer Tools · head to head

Keycloak vs Superhuman

Keycloak logo

Keycloak

Developer Tools

Open-source identity and access management server.

From
Free
Free plan
Yes
Full reviewWebsite
Superhuman logo

Superhuman

Technology

The fastest email experience ever made

From
$30/month
Free plan
No
Full reviewWebsite

The short version

  • Only Keycloak has a free tier, so it costs nothing to try first.
  • Each has a real cost: Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain; Superhuman high pricing compared to free alternatives like Gmail
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Keycloak and Superhuman actually diverge.

Attributes where Keycloak and Superhuman differ
AttributeKeycloakSuperhuman
Starting priceFree$30/month
Pricing modelopen-sourceUnknown
Free tierYesNo
PlatformsSelf-hosted, Docker, Kubernetes, Linux, Windows, APIWeb, iOS
CategoryDeveloper ToolsTechnology
FoundedUnknown2015

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 Keycloak

Nothing recorded that Superhuman does not also cover.

Only in Superhuman

  • Blazing fast performance
  • Keyboard-first design
  • AI-powered triage
  • Split inbox
  • Read statuses
  • Remind me later
  • Social insights
  • Calendar integration

What people use each for

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

Keycloak

  • Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Superhuman
  • Companies with existing LDAP/Active Directory systems needing federated authenticationnot Superhuman
  • Open-source projects and communities requiring free IAM without licensing costsnot Superhuman
  • Enterprises building custom identity workflows requiring fine-grained authorisationnot Superhuman
  • Teams with sufficient operational expertise to manage infrastructurenot Superhuman

Superhuman

  • Email managementnot Keycloak
  • Inbox zeronot Keycloak
  • Team collaborationnot Keycloak
  • Sales outreachnot Keycloak
  • Executive communicationnot Keycloak

Where each one falls short

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

Keycloak

  • Requires self-hosted deployment and operational expertise to install, configure and maintain
  • No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
  • Clustering and high-availability configurations require additional operational knowledge
  • Community support only; commercial support requires third-party vendors or distributions

Superhuman

  • High pricing compared to free alternatives like Gmail
  • Lacks unified inbox for managing multiple email accounts in a single view
  • Limited calendar functionality compared to dedicated scheduling tools
  • No native task management features

Pricing, plan by plan

Keycloak

Free
  • Open-sourceFree
    • Full platform functionality
    • Self-hosted deployment
    • Community support

Superhuman

$30/month
  • Starter$30/month
    • Email productivity
    • Superhuman AI
    • Team collaboration
  • Business$40/month
    • Auto Drafts
    • Ask AI
    • CRM integrations

Which should you pick?

Choose Keycloak if

  • You want to start without paying.
  • You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Keycloak review

Choose Superhuman if

  • You need blazing fast performance.
  • You work on Web, iOS.
  • You also want keyboard-first design.
Superhuman review

Questions people ask

Is Keycloak or Superhuman better?
Neither clearly leads. Keycloak starts at Free and Superhuman at $30/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Keycloak or Superhuman?
Keycloak has a free tier; the other does not. Paid plans start at Free for Keycloak and $30/month for Superhuman.
Does Keycloak or Superhuman run on more platforms?
Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API. Superhuman runs on Web, iOS.
Can I use Keycloak for free?
Yes. Keycloak has a free tier, so you can try it without paying. Superhuman starts at $30/month.
What is Keycloak best used for?
Keycloak is most often used for organisations requiring self-hosted identity infrastructure for compliance or data residency, companies with existing ldap/active directory systems needing federated authentication, open-source projects and communities requiring free iam without licensing costs, enterprises building custom identity workflows requiring fine-grained authorisation. Of those, organisations requiring self-hosted identity infrastructure for compliance or data residency and companies with existing ldap/active directory systems needing federated authentication are not what Superhuman is typically brought in for.
What can Keycloak do that Superhuman cannot?
Superhuman covers Blazing fast performance, Keyboard-first design, AI-powered triage, Split inbox.

Answered from the vendors’ own pages

Keycloak: What protocols does Keycloak support?

Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.

Source
Superhuman: How much does Superhuman cost?

Superhuman offers three plans: Starter at $30/user/month, Business at $40/user/month, and Enterprise with custom pricing. Annual billing provides approximately 16.7% savings, bringing the Starter plan to $25/month.

Source
Keycloak: Can Keycloak integrate with existing user directories?

Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.

Source
Superhuman: What email platforms does Superhuman work with?

Superhuman is compatible with Gmail and Outlook, and integrates with Google Calendar and Akiflow for calendar and task planning workflows.

Source
Keycloak: Is Keycloak free?

Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.

Source
Superhuman: Does the Business plan include CRM integrations?

Yes, the Business plan at $40/month unlocks CRM integrations with HubSpot and Salesforce, along with advanced AI features like Auto Drafts and Ask AI.

Source
Superhuman: What happened to Superhuman after the Grammarly acquisition?

Superhuman was acquired by Grammarly on July 1, 2025. The company now operates under the Superhuman name while integrating with Grammarly's AI platform.

Source
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