Windmill vs Haystack vs ROK Solution vs Appian

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Windmill
vs
Competitor 1
Haystack
Competitor 2
ROK Solution
Competitor 3
Appian
Compare
4 tools · best value per row highlighted
Your tool Windmill
windmill.dev
Windmill is an open-source, code-first orchestration platform for internal software.
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Competitor Haystack
haystack.deepset.ai
Haystack is an open-source AI orchestration framework from deepset for building production-grade LLM applications and agents.
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Competitor ROK Solution
rok-solution.com
Organizations wrestling with strict compliance requirements and complex security mandates need ROK Solution
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Competitor Appian
appian.com
Appian is an enterprise platform for process automation that orchestrates AI agents, existing systems and people from one place.
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Traffic estimated monthly website traffic
Monthly visits
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1.2Kvisits/mo
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MoM change
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▲ 4.3%
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6-month growth
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-35.5%
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Global rank web
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#12,872,025
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Avg. last 3 months
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1.2K
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Bounce rate lower is better
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38%
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Pages / visit
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2.2
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Visit duration
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48s
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Traffic sources
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WindmillHaystackROK SolutionAppian
05721.1K1.7K2.3KROK Solution · 337ROK Solution · 677ROK Solution · 811ROK Solution · 1.8KROK Solution · 2.3KROK Solution · 1.1KROK Solution · 1.4KROK Solution · 1.1KROK Solution · 1.2K1001K10KROK Solution · 337ROK Solution · 677ROK Solution · 811ROK Solution · 1.8KROK Solution · 2.3KROK Solution · 1.1KROK Solution · 1.4KROK Solution · 1.1KROK Solution · 1.2KDec '25Jan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
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Freemium
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Starting price
$120per month · free tier available
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Free tier
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Free trial
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API access
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Plans
Free and Open-source (self-host) FreeEnterprise $120/mo
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Capabilities input → output
Input
Code
CodeDocuments
Text
DataDocumentsText
Output
Apps
Apps
Apps
Apps
Skill level
Advanced
Advanced
Intermediate
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI WorkflowNo-Code & Low-Code
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
7
7
8
Process automation
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Workflows
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No-code
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Agents
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Agent creation
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Developer tools
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Self hosted
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Workflow deployment
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LLM development
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RAG
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Business automation
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APIs
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Agent memory
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Compliance management
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Document data extraction
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Finance workflow automation
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HR
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Security compliance
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
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Saves
0
0
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0
Reviews
0
0
0
0
Prompts
0
0
0
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Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.