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Machine Learning · head to head

Haystack vs Helicone

Haystack logo

Haystack

Machine Learning

Open-source AI orchestration framework for LLM applications

From
Free
Rated
-
Helicone logo

Helicone

AI

Open-source LLM observability and gateway platform for AI applications

From
Free
Rated
-

The short version

  • Each has a real cost: Haystack requires Python programming knowledge for advanced customization; Helicone the free Hobby plan is capped at 10,000 requests per month, which teams with production traffic can exceed quickly.
  • They diverge on capability: Haystack covers Modular pipeline composition, Helicone covers Request dashboard and tracking.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Haystack and Helicone actually diverge.

Attributes where Haystack and Helicone differ
AttributeHaystackHelicone
Pricing modelOpen-source with optional paid enterprise supportfreemium
PlatformsPython, Cloud-agnosticweb, api
CategoryMachine LearningAI

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 Helicone

  • Request dashboard and tracking
  • Sessions and segments
  • Helicone Query Language (HQL)
  • Prompt datasets and improvement
  • Playground
  • Rate limits and alerts

What people use each for

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

Haystack

  • Building production LLM applications with full controlnot Helicone
  • Creating retrieval-augmented generation systemsnot Helicone
  • Developing autonomous AI agentsnot Helicone
  • Multi-provider LLM orchestrationnot Helicone
  • Enterprise AI infrastructurenot Helicone

Helicone

  • Monitoring cost and latency of production LLM applicationsnot Haystack
  • Debugging multi-step agent sessionsnot Haystack
  • Managing and iterating on prompts across a teamnot Haystack
  • Routing requests across multiple LLM providersnot 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

Helicone

  • The free Hobby plan is capped at 10,000 requests per month, which teams with production traffic can exceed quickly.
  • Advanced compliance features like SOC 2 and HIPAA are only available starting at the $799/month Team plan.
  • Usage beyond the free tier is billed on top of the base subscription, adding cost unpredictability at scale.
  • On-premises deployment is restricted to the custom Enterprise tier.

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

Helicone

Free
  • HobbyFree
    • 10,000 free requests
    • 1 GB storage
    • 1 seat
  • Pro$79/month
    • 10K free requests included, usage-based beyond
    • 7-day free trial
    • Unlimited playgrounds and workspaces
  • Team$799/month
    • 5 organizations
    • SOC 2 and HIPAA compliance
    • Dedicated Slack channel access
  • Enterprise$undefined/mo
    • Custom MSAs and SAML SSO
    • On-premises deployment
    • Bulk cloud discounts

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 Helicone if

  • You need request dashboard and tracking.
  • You want to start without paying.
  • You work on web, api.
  • You also want sessions and segments.

Questions people ask

Is Haystack or Helicone better?
Neither clearly leads. Haystack starts at Free and Helicone at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Haystack or Helicone?
Haystack starts at Free and Helicone at Free.
Does Haystack or Helicone run on more platforms?
Haystack runs on Python, Cloud-agnostic. Helicone runs on web, api.
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 Helicone is typically brought in for.
What can Haystack do that Helicone cannot?
Haystack covers Modular pipeline composition, Multi-provider LLM support, Retrieval-augmented generation, Agent framework. Helicone covers Request dashboard and tracking, Sessions and segments, Helicone Query Language (HQL), Prompt datasets and improvement.

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.

Source
Helicone: What does Helicone cost?

Helicone offers a free Hobby plan, a Pro plan at $79/month, a Team plan at $799/month, and custom Enterprise pricing, with usage-based charges applying beyond included request limits.

Source
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.

Source
Helicone: Is there a free plan, and what are its limits?

The free Hobby plan includes 10,000 requests per month, 1 GB of storage, 1 seat, and 1 organization, aimed at kickstarting AI projects.

Source
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.

Source
Helicone: Are there discounts available?

Helicone offers 50% off the first year for qualifying startups, discounts for non-profits, a $100 annual credit for open-source projects, and free access for students.

Source
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