Machine Learning · head to head
Haystack vs Ory Kratos
Haystack
Machine Learning
Open-source AI orchestration framework for LLM applications
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Haystack requires Python programming knowledge for advanced customization; Ory Kratos headless means you build every screen, which is significant work compared with a hosted login page
- They diverge on capability: Haystack covers Modular pipeline composition, Ory Kratos covers Headless API.
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which Haystack and Ory Kratos actually diverge.
| Attribute | Haystack | Ory Kratos |
|---|---|---|
| Pricing model | Open-source with optional paid enterprise support | Open-source self-hosted, with a paid managed network |
| Platforms | Python, Cloud-agnostic | Linux, Docker, Kubernetes, Self-hosted |
| Category | Machine Learning | Cybersecurity |
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 Haystack
- Modular pipeline composition
- Multi-provider LLM support
- Retrieval-augmented generation
- Agent framework
- Memory management
- Observability and debugging
- Kubernetes-ready deployment
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.
Haystack
- Building production LLM applications with full controlnot Ory Kratos
- Creating retrieval-augmented generation systemsnot Ory Kratos
- Developing autonomous AI agentsnot Ory Kratos
- Multi-provider LLM orchestrationnot Ory Kratos
- Enterprise AI infrastructurenot Ory Kratos
Ory Kratos
- Products needing complete control over the look and flow of authenticationnot Haystack
- Applications that must not hand user identity data to a third partynot Haystack
- Teams building identity as infrastructure across several servicesnot Haystack
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Haystack
- Requires Python programming knowledge for advanced customization
- Steeper learning curve compared to no-code platforms
- Community support only on free tier may limit enterprise adoption
- Ongoing maintenance dependency for open-source framework
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
Haystack
Free- Open SourceFree
- Full framework access
- Community Discord support
- GitHub community contributions
- Enterprise Support$undefined/custom
- Private secure engineering support
- Best practices templates and deployment guides
- Flexible services and integrations
Ory Kratos
Free- Self-hostedFree
- Full identity server
- All flows
- Community support
Which should you pick?
Choose Haystack if
- You need modular pipeline composition.
- You want to start without paying.
- You work on Python, Cloud-agnostic.
- You also want multi-provider llm support.
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.
Questions people ask
- Is Haystack or Ory Kratos better?
- Neither clearly leads. Haystack 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, Haystack or Ory Kratos?
- Haystack starts at Free and Ory Kratos at Free.
- Does Haystack or Ory Kratos run on more platforms?
- Haystack runs on Python, Cloud-agnostic. Ory Kratos runs on Linux, Docker, Kubernetes, Self-hosted.
- Can I use Haystack for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Haystack best used for?
- Haystack is most often used for building production llm applications with full control, creating retrieval-augmented generation systems, developing autonomous ai agents, multi-provider llm orchestration. Of those, building production llm applications with full control and creating retrieval-augmented generation systems are not what Ory Kratos is typically brought in for.
- What can Haystack do that Ory Kratos cannot?
- Haystack covers Modular pipeline composition, Multi-provider LLM support, Retrieval-augmented generation, Agent framework. Ory Kratos covers Headless API, Self-service flows, Multi-factor authentication, Pluggable identity schemas.
Answered from the vendors’ own pages
Haystack: Is Haystack completely free to use?
Yes, the open-source Haystack framework is completely free. deepset offers optional paid enterprise support packages for organizations needing secure engineering support and deployment guidance.
SourceOry Kratos: Is Ory Kratos free?
Yes, open source and free to self-host. Ory Network is a paid managed service.
Haystack: What LLM providers does Haystack support?
Haystack supports multiple LLM providers including OpenAI, Anthropic, Mistral, Cohere, and others, allowing teams to avoid vendor lock-in and switch providers as needed.
SourceOry 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.
Haystack: Can I deploy Haystack in production environments?
Yes, Haystack is designed for production use with Kubernetes-ready pipelines, built-in reliability features, and observability tools for enterprise-scale deployments.
SourceOry Kratos: Does Kratos do OAuth2?
No. Kratos handles user identity; OAuth2 and OpenID Connect provider functionality is Ory Hydra, a separate component.
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- Ory Kratos vs Envysion
- Ory Kratos vs Feedzai
- Ory Kratos vs HashiCorp Boundary
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