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Auth0 vs Earthly

Auth0 logo

Auth0

Technology

Secure access for everyone

From
Free
Free plan
Yes
Full reviewWebsite
Earthly logo

Earthly

Developer Tools

Engineering guardrails for the AI era

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Auth0 free tier limited to 25,000 monthly active users, requiring upgrade for growth beyond that; Earthly pricing model not published; requires sales contact
  • They diverge on capability: Auth0 covers Universal login, Earthly covers Policy as code.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Auth0 and Earthly actually diverge.

Attributes where Auth0 and Earthly differ
AttributeAuth0Earthly
Pricing modelUnknownNo pricing published on website
PlatformsWeb, iOS, AndroidWeb, CLI
CategoryTechnologyDeveloper Tools
Founded20132020

Identical on both: starting price (Free), free tier (Yes), 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 Auth0

  • Universal login
  • Social login
  • Multi-factor authentication
  • Passwordless
  • User management
  • Anomaly detection
  • Extensibility
  • Machine to machine

Only in Earthly

  • Policy as code
  • Multi-stage enforcement
  • AI agent governance
  • Repository-wide policies
  • Incident response automation
  • Compliance management
  • Earthfiles build tool
  • Satellites

What people use each for

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

Auth0

  • B2C authenticationnot Earthly
  • B2B authenticationnot Earthly
  • B2E authenticationnot Earthly
  • API securitynot Earthly
  • Mobile app securitynot Earthly

Earthly

  • Enforcing engineering standards across AI and human developersnot Auth0
  • Automating incident response procedures across all repositoriesnot Auth0
  • Embedding compliance requirements into development workflowsnot Auth0
  • Standardizing build processes with Earthfilesnot Auth0

Where each one falls short

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

Auth0

  • Free tier limited to 25,000 monthly active users, requiring upgrade for growth beyond that
  • Advanced features like MFA and RBAC only available on paid Essentials tier and above
  • Ownership by Okta introduces risk that independent product roadmap may change

Earthly

  • Pricing model not published; requires sales contact
  • Earthly Lunar is a recent launch (2025) with limited track record
  • Primarily GitHub-focused; limited integration with other platforms
  • No public documentation on pricing or feature tiers

Pricing, plan by plan

Auth0

Free
  • FreeFree
    • Up to 25,000 monthly active users
    • Basic authentication
    • Email/password login
  • Essentials (B2C)$35/month
    • Unlimited MAUs beyond free tier
    • Multi-Factor Authentication
    • Role-Based Access Control
  • Professional (B2C)$240/month
    • All Essentials features
    • Advanced security
    • Custom branding

Earthly

Free

No published plan breakdown. See the Earthly review.

Which should you pick?

Choose Auth0 if

  • You need universal login.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want social login.
Auth0 review

Choose Earthly if

  • You need policy as code.
  • You want to start without paying.
  • You work on Web, CLI.
  • You also want multi-stage enforcement.
Earthly review

Questions people ask

Is Auth0 or Earthly better?
Neither clearly leads. Auth0 starts at Free and Earthly at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Auth0 or Earthly?
Auth0 starts at Free and Earthly at Free.
Does Auth0 or Earthly run on more platforms?
Auth0 runs on Web, iOS, Android. Earthly runs on Web, CLI.
Can I use Auth0 for free?
Both have a free tier, so you can try either at no cost before committing.
What is Auth0 best used for?
Auth0 is most often used for b2c authentication, b2b authentication, b2e authentication, api security. Of those, b2c authentication and b2b authentication are not what Earthly is typically brought in for.
What can Auth0 do that Earthly cannot?
Auth0 covers Universal login, Social login, Multi-factor authentication, Passwordless. Earthly covers Policy as code, Multi-stage enforcement, AI agent governance, Repository-wide policies.

Answered from the vendors’ own pages

Auth0: How much does Auth0 cost?

Auth0 has a Free tier for up to 25,000 monthly active users (MAUs). Paid plans start at $35/month (Essentials B2C) and scale to $240/month (Professional B2C) and higher for Enterprise. Pricing scales with MAU usage.

Source
Earthly: What is the difference between Earthfiles and Earthly Lunar?

Earthfiles is an open-source build tool that reached 12,000 GitHub stars and is used by companies like NVIDIA, Intel, and Databricks. Earthly Lunar is a separate governance platform launched in 2025 for enforcing standards across development workflows.

Source
Auth0: Does Auth0 include Multi-Factor Authentication?

No. MFA, RBAC (Role-Based Access Control), and premium support are not included in the free tier and require upgrading to paid Essentials plans or higher.

Source
Earthly: How does Earthly Lunar enforce standards?

Lunar converts engineering standards, compliance requirements, and processes documented in AGENTS.md files, wikis, and incident postmortems into enforceable guardrails that apply consistently across repositories and development stages.

Source
Auth0: Is Auth0 independent or part of a larger company?

Auth0 was acquired by Okta in May 2021 for $6.5 billion. It now operates as a subsidiary business unit within Okta, but maintains its own brand and operations.

Source
Earthly: What is the pricing for Earthly Lunar?

Pricing is not published on the website. Interested customers should contact Earthly's sales team for current pricing and feature tiers.

Source
Auth0: Who should use Auth0 vs Okta?

Auth0 is developer-focused and serves customer identity use cases (B2C). Okta serves workforce identity (B2B) and has broader enterprise features. Auth0 now serves both markets post-acquisition but maintains its developer-friendly positioning.

Source
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