Clay vs Windmill
A detailed comparison to help you choose between Clay and Windmill.
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Verdict: Windmill wins
Windmill scores 4.2/5, edging out Clay at 3.9/5. Engineering teams who want code-first internal tools, workflows and APIs on infrastructure they control, with no per-execution billing.
Clay AI-powered data enrichment and outreach | Windmill Open-source workflow automation for developers | |
|---|---|---|
| Rating | 3.9 (1 review) | 4.2 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | GTM engineers and outbound teams who will pay for data quality and want one workbench for enrichment, signals, research, and campaign prep. | Engineering teams who want code-first internal tools, workflows and APIs on infrastructure they control, with no per-execution billing. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierteam features | open sourcefree tierapi access |
| Visit Clay → | Visit Windmill → |
Clay
Pros
- + Waterfall enrichment cut my blended per-contact cost roughly in half versus single-provider lookup (71% email coverage on 500 companies across three providers)
- + Two-meter pricing (Data Credits + Actions) is clearer than the old unified credit; Clay claims marketplace data prices dropped 50–90% in the redesign
- + 200+ data providers in one contract replaces a stack of separate enrichment subscriptions
- + Claygent research answered structured questions with source URLs on most rows in my test — useful when staged behind cheaper filters
- + Financially credible and shipping fast: $115M Series D at $7.1B valuation (clay.com/blog/series-d), 17k+ customers claimed
Cons
- - Real entry price is $185/mo (Launch) plus credit burn — the legacy $149 Starter figure floating around aggregators is outdated
- - Waterfall ordering is unforgiving: putting an expensive provider first tripled my credit burn for 5% more coverage in one test
- - Generalist automation is out of scope — no arbitrary SaaS triggers, no self-hosting; GTM data motions only
- - Some Series D "self-learning revenue engine" claims are roadmap, not what ships today; treat the agent story as vendor vision
- - Email accuracy still depends on underlying providers — I saw mid-single-digit bounce rates on best-effort results and ran downstream validation
Windmill
Pros
- + Script-first model: typed functions become endpoints, jobs and flow steps with auto-generated UIs — my nightly pipeline was rebuilt in one Docker session
- + Free self-hosted tier carries unlimited executions, not a trial disguised as a plan
- + Rust execution engine kept orchestration overhead sub-second between flow steps in my tests
- + Worker-group model scales throughput with replicas and tag routing instead of redesigns
- + Transparent per-unit Enterprise pricing ($20/builder, $10/non-builder, $50/worker) with published SLA terms
Cons
- - Zero no-code path — teams without developers cannot use it at any price
- - Prebuilt Community Edition images bundle proprietary Windmill Labs terms (no resale/wrapping/modifying), separate from the AGPLv3 source build
- - Worker groups and role configuration have a real learning curve before the platform pays off
- - Small vendor (under twenty employees in 2024 reporting, ~$15M raised) relative to the incumbents it replaces
- - Flow durability is lighter than Temporal for mission-critical long-running orchestration
Frequently Asked Questions
Which is better, Clay or Windmill?▼
Windmill scores higher at 4.2/5 vs 3.9/5 for Clay, making it the better-rated option in our comparison.
What is the difference between Clay and Windmill?▼
Clay: Clay is a sales and marketing data platform that pulls contact and company data from 200+ providers, enriches it with AI agents, and powers targeted outreach for go-to-market teams. Windmill: Windmill is an open-source platform that turns scripts in Python, TypeScript, Go and other languages into workflows, internal apps and scheduled jobs. It is aimed at developers who prefer code over drag-and-drop builders.
Is Clay or Windmill more affordable?▼
Clay starts at €0/mo, Windmill starts at €0/mo. Check the comparison table above for current pricing.
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