Windmill vs Zapier vs Relay.app vs Appian

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

Your tool
Windmill
vs
Competitor 1
Zapier
Competitor 2
Relay.app
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 Zapier
zapier.com
Connect your apps without writing code
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Competitor Relay.app
relay.app
Relay.app is a platform to create AI Agents that work for you across Gmail, Notion, Salesforce, HubSpot, and 100+ other apps. Agents created in Relay.app are *actually* useful, as they're easy to cre
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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
—
5.3Mvisits/mo
158.1Kvisits/mo
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MoM change
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▼ 5.9%
▼ 32.7%
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6-month growth
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-26.7%
-30.9%
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Global rank web
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#6,051
#182,862
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Avg. last 3 months
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5.5M
187.1K
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Bounce rate lower is better
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38%
38%
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Pages / visit
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10.2
2.8
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Visit duration
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6m 43s
1m 15s
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Traffic sources
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● Direct 81% · ● Referral 12%
● Direct 93% · ● Referral 4%
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WindmillZapierRelay.appAppian
01.8M3.6M5.5M7.3MZapier · 6.3MZapier · 5.9MZapier · 6.8MZapier · 6.5MZapier · 7.3MZapier · 6.6MZapier · 6MZapier · 5.5MZapier · 5.7MZapier · 5.3MRelay.app · 216.8KRelay.app · 241.7KRelay.app · 272KRelay.app · 229.9KRelay.app · 228.8KRelay.app · 251.1KRelay.app · 193.9KRelay.app · 168.4KRelay.app · 234.9KRelay.app · 158.1K100K1M10MZapier · 6.3MZapier · 5.9MZapier · 6.8MZapier · 6.5MZapier · 7.3MZapier · 6.6MZapier · 6MZapier · 5.5MZapier · 5.7MZapier · 5.3MRelay.app · 216.8KRelay.app · 241.7KRelay.app · 272KRelay.app · 229.9KRelay.app · 228.8KRelay.app · 251.1KRelay.app · 193.9KRelay.app · 168.4KRelay.app · 234.9KRelay.app · 158.1KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
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Starting price
$120per month · free tier available
$19.99per month · free tier available
$19per 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
Free FreeProfessional $19.99/moTeam $69/moEnterprise Custom
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Capabilities input → output
Input
Code
Text
Text
DataDocumentsText
Output
Apps
Apps
Apps
Apps
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Productivity & OfficeAI AgentAI Workflow
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
9
6
6
8
Workflows
Agents
No-code
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Process automation
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Agent creation
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Business automation
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Automation
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–
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Self hosted
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–
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APIs
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Developer tools
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Document data extraction
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Finance workflow automation
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–
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Lead generation
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Lead management
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–
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Productivity
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–
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Workflow deployment
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
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.