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APIs · head to head

Appwrite vs Ory Kratos

Appwrite logo

Appwrite

APIs

Open-source Backend as a Service with REST API and SDKs

From
Free
Rated
-
Full reviewWebsite
Ory Kratos logo

Ory Kratos

Cybersecurity

Headless identity and user management API

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Appwrite smaller ecosystem compared to Firebase; fewer third-party integrations and extensions; Ory Kratos headless means you build every screen, which is significant work compared with a hosted login page
  • They diverge on capability: Appwrite covers REST API, Ory Kratos covers Headless API.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Appwrite and Ory Kratos actually diverge.

Attributes where Appwrite and Ory Kratos differ
AttributeAppwriteOry Kratos
Pricing modelUnknownOpen-source self-hosted, with a paid managed network
PlatformsCloud (Managed), Self-Hosted, DockerLinux, Docker, Kubernetes, Self-hosted
CategoryAPIsCybersecurity
Founded2019Unknown

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 Appwrite

  • REST API
  • Authentication
  • Database
  • Multiple SDKs
  • Cloud functions
  • File storage
  • Docker support
  • Self-hosted support

Only in Ory Kratos

  • Headless API
  • Self-service flows
  • Multi-factor authentication
  • Pluggable identity schemas

What people use each for

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

Appwrite

  • API Developmentnot Ory Kratos
  • API Gatewaynot Ory Kratos
  • API Testingnot Ory Kratos
  • API Documentationnot Ory Kratos
  • Microservicesnot Ory Kratos

Ory Kratos

  • Products needing complete control over the look and flow of authenticationnot Appwrite
  • Applications that must not hand user identity data to a third partynot Appwrite
  • Teams building identity as infrastructure across several servicesnot Appwrite

Where each one falls short

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

Appwrite

  • Smaller ecosystem compared to Firebase; fewer third-party integrations and extensions
  • Analytics, crash reporting, and A/B testing not included (Firebase includes these)
  • Requires infrastructure management for self-hosted deployments; not fully managed like Firebase Cloud
  • Mobile app support not as mature as Firebase's native iOS/Android SDKs

Ory Kratos

  • Headless means you build every screen, which is significant work compared with a hosted login page
  • More moving parts than a monolithic IAM: Kratos handles identity, and OAuth2 needs Ory Hydra alongside
  • Documentation assumes real familiarity with identity concepts and is not a gentle introduction
  • Self-hosting identity carries the security and availability burden that hosted providers absorb

Pricing, plan by plan

Appwrite

Free
  • Cloud FreeFree
    • 75K MAU
    • 10GB storage
    • Unlimited projects
  • Cloud Pro$15/month
    • More storage
    • Priority support

Ory Kratos

Free
  • Self-hostedFree
    • Full identity server
    • All flows
    • Community support

Which should you pick?

Choose Appwrite if

  • You need rest api.
  • You want to start without paying.
  • You work on Cloud (Managed), Self-Hosted, Docker.
  • You also want authentication.
Appwrite review

Choose Ory Kratos if

  • You need headless api.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want self-service flows.
Ory Kratos review

Questions people ask

Is Appwrite or Ory Kratos better?
Neither clearly leads. Appwrite starts at Free and Ory Kratos at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Appwrite or Ory Kratos?
Appwrite starts at Free and Ory Kratos at Free.
Does Appwrite or Ory Kratos run on more platforms?
Appwrite runs on Cloud (Managed), Self-Hosted, Docker. Ory Kratos runs on Linux, Docker, Kubernetes, Self-hosted.
Can I use Appwrite for free?
Both have a free tier, so you can try either at no cost before committing.
What is Appwrite best used for?
Appwrite is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Ory Kratos is typically brought in for.
What can Appwrite do that Ory Kratos cannot?
Appwrite covers REST API, Authentication, Database, Multiple SDKs. Ory Kratos covers Headless API, Self-service flows, Multi-factor authentication, Pluggable identity schemas.

Answered from the vendors’ own pages

Appwrite: Can Appwrite be self-hosted?

Yes. Appwrite is fully open-source and self-hosted with a single Docker command. Self-hosting is completely free with no feature restrictions, unlike the managed Appwrite Cloud.

Source
Ory Kratos: Is Ory Kratos free?

Yes, open source and free to self-host. Ory Network is a paid managed service.

Appwrite: What is Appwrite Cloud's pricing?

Appwrite Cloud offers a free tier with unlimited projects, 75K monthly active users, and 10GB storage with no time limit. Pro plan starts at $15/month per organization member. Scale plan at $599/month includes dedicated resources and SOC 2 compliance.

Source
Ory Kratos: What does headless mean here?

Kratos provides identity flows as APIs and no user interface. You build the login, registration and recovery screens yourself.

Appwrite: What programming languages does Appwrite support?

Appwrite provides SDKs for 15+ languages including JavaScript, Flutter, Swift, Kotlin, Python, Ruby, PHP, .NET, and more, offering more language flexibility than Firebase.

Source
Ory Kratos: Does Kratos do OAuth2?

No. Kratos handles user identity; OAuth2 and OpenID Connect provider functionality is Ory Hydra, a separate component.

Appwrite: What backend services does Appwrite provide?

Appwrite includes Auth (with multi-factor auth), Databases, Storage (with compression and encryption), Serverless Functions, Messaging, Realtime subscriptions, and Sites (for hosting static and full-stack apps).

Source
Appwrite: Does Appwrite include real-time capabilities?

Yes. Appwrite's Realtime service covers all platform services by default through WebSocket subscriptions, enabling real-time updates across databases, functions, and messages.

Source
Appwrite: How does Appwrite compare to Firebase on costs?

Appwrite offers better cost predictability. Firebase's pay-per-read/write model can lead to unexpected bills with runaway queries, while Appwrite's self-hosted model only requires paying for your own infrastructure with completely predictable costs.

Source
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