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Machine Learning · head to head

Haystack vs Lindy

Haystack logo

Haystack

Machine Learning

Open-source AI orchestration framework for LLM applications

From
Free
Free plan
Yes
Full reviewWebsite
Lindy logo

Lindy

AI

AI teammate that automates work across your entire software stack

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Haystack requires Python programming knowledge for advanced customization; Lindy requires per-user subscription, which scales costs with team size
  • They diverge on capability: Haystack covers Modular pipeline composition, Lindy covers Slack integration.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Haystack and Lindy actually diverge.

Attributes where Haystack and Lindy differ
AttributeHaystackLindy
Pricing modelOpen-source with optional paid enterprise supportPer-user subscription with shared credit pool
PlatformsPython, Cloud-agnosticWeb, Slack, Email, Mobile
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 Lindy

  • Slack integration
  • Email automation
  • Meeting transcription
  • Scheduled routines
  • 1,000+ app integrations
  • Skill library
  • Editable memory
  • MCP support

What people use each for

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

Haystack

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

Lindy

  • Automating email and calendar management across teamsnot Haystack
  • Transcribing and summarizing meetings automaticallynot Haystack
  • Updating CRM systems with meeting notes and leadsnot Haystack
  • Generating daily reports and weekly briefsnot Haystack
  • Processing structured data from multiple applicationsnot 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

Lindy

  • Requires per-user subscription, which scales costs with team size
  • Limited free trial period of 7 days may not allow full evaluation
  • Credit system complexity could be confusing for new users
  • Not designed for technical teams as primary tool

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

Lindy

Free
  • Free TrialFree
    • 7-day free trial for new team members joining via Slack
  • Plus$29.99/month
    • 3,000 credits per month
    • Slack integration
    • Email automation
  • Pro$99.99/month
    • 15,000 credits per month
    • All Plus features
    • Advanced automation
  • Max$199.99/month
    • 35,000 credits per month
    • All Pro features
    • Priority 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.
Haystack review

Choose Lindy if

  • You need slack integration.
  • You want to start without paying.
  • You work on Web, Slack, Email, Mobile.
  • You also want email automation.
Lindy review

Questions people ask

Is Haystack or Lindy better?
Neither clearly leads. Haystack starts at Free and Lindy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Haystack or Lindy?
Haystack starts at Free and Lindy at Free.
Does Haystack or Lindy run on more platforms?
Haystack runs on Python, Cloud-agnostic. Lindy runs on Web, Slack, Email, Mobile.
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 Lindy is typically brought in for.
What can Haystack do that Lindy cannot?
Haystack covers Modular pipeline composition, Multi-provider LLM support, Retrieval-augmented generation, Agent framework. Lindy covers Slack integration, Email automation, Meeting transcription, Scheduled routines.

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
Lindy: How does Lindy maintain data privacy and security?

Lindy is SOC 2 Type II, GDPR, HIPAA, and PIPEDA compliant. Data is encrypted in transit and at rest. The platform never sells your data or uses it to train models. Enterprise plans include signed BAAs and audit logs.

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
Lindy: Can we start with a free trial?

New team members joining through Slack receive a 7-day free trial before being billed. Direct signups are charged immediately. There is no permanent free tier after the trial.

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
Lindy: How many applications can Lindy integrate with?

Lindy connects to over 1,000 applications including Gmail, Notion, HubSpot, GitHub, Stripe, and others, with support for Model Context Protocol servers for custom integrations.

Source
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