Public price
Found a public price ($ 120 /mo) on the pricing page.
Open sourceWindmill alternatives
Windmill costs $120 /mo. We found 6.5 out of 10 of the buying evidence we check for. 9 of the 22 other products below publish more.
This is a comparison of what each company publishes on its own site. It covers price, free access, measured results, documented limits, product updates, and testing methods. It is evidence for a shortlist, not a rating of product quality. The products below share a broad category and are not necessarily direct substitutes. Use Comparima for direct competitors.
AI agent frameworksHow this market looks from public information.
10 of 23for published buying evidence
9 of 10comparable monthly prices are lower
91%can be tried first
52%publish measured results
83%state their limits
What we could verify
Every finding links to the page it came from. Open the source before relying on it.
Try before paying
A buyer can verify the claim themselves without paying ("Get started for free").
Open sourceMeasured customer result
Makes a performance claim ("enterprise-grade") with no number, dataset or test behind it that we could find.
Open sourceDocumented limits
Documents where it falls short ("Up to 2 users").
Open sourceTesting method
No description of how the product was tested or evaluated.
Open sourceRecent product updates
Public changelog with versioned entries (found v1.771.0).
Open sourceAsk before you buy
These questions come from the information we could not verify on the public site.
- What measurable result has a customer like us achieved?
- How were the headline claims tested, and what was the baseline?
Compare the field
Showing 12 of 22 that match your filters.
Windmillwindmill.dev
6.5/10website evidence$120 /mo
No measured result we could find. No test method we could find.
- Price is on the site
- You can try it without paying
- Says what it cannot do
- Actively maintained
- No measured result we could find
- No test method we could find
Vercel AI SDKvercel.com
10/10website evidence$20 /mo
Publishes more buying evidence than Windmill. Much cheaper at $20 a month against $120. Publishes a measured result, unlike Windmill.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
Daytonadaytona.io
8/10website evidenceno price we could read
Publishes about as much buying evidence as Windmill. Publishes a measured result, unlike Windmill.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- No price we could find
Haystackhaystack.deepset.ai
8/10website evidenceno price we could read
Publishes about as much buying evidence as Windmill. Publishes a measured result, unlike Windmill.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- No price we could find
Langflowlangflow.org
8/10website evidenceno price we could read
Publishes about as much buying evidence as Windmill. Publishes a measured result, unlike Windmill.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- No price we could find
Lettaletta.com
9/10website evidence$20 /month
Publishes more buying evidence than Windmill. Much cheaper at $20 a month against $120. Publishes a measured result, unlike Windmill.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No public changelog we could find
LlamaIndexllamaindex.ai
9/10website evidence$50 /month
Publishes more buying evidence than Windmill. Much cheaper at $50 a month against $120. Publishes a measured result, unlike Windmill.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No public changelog we could find
Modalmodal.com
9/10website evidence$30 / month
Publishes more buying evidence than Windmill. Much cheaper at $30 a month against $120. Publishes a measured result, unlike Windmill.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No public changelog we could find
PydanticAIpydantic.dev
8.5/10website evidence$49/mo
Publishes more buying evidence than Windmill. Much cheaper at $49 a month against $120. Publishes a measured result, unlike Windmill.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- No test method we could find
Agnoagno.com
6.5/10website evidence$150/mo
Publishes about as much buying evidence as Windmill. Dearer at $150 a month against $120.
- Price is on the site
- You can try it without paying
- Says what it cannot do
- Actively maintained
- No measured result we could find
- No test method we could find
Inngestinngest.com
6.5/10website evidence$99/mo
Publishes about as much buying evidence as Windmill. Cheaper at $99 a month against $120.
- Price is on the site
- You can try it without paying
- Says what it cannot do
- Actively maintained
- No measured result we could find
- No test method we could find
Mastramastra.ai
7/10website evidenceno price we could read
Publishes about as much buying evidence as Windmill. Publishes a measured result, unlike Windmill.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No public changelog we could find
Temporaltemporal.io
6.5/10website evidenceno price we could read
Publishes about as much buying evidence as Windmill. Publishes a measured result, unlike Windmill.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- No price we could find
- No test method we could find
Read in August 2026 from pages anyone can open. This is what each company puts on its own site, which is not the same as how good the product is. Something excellent can still tell you very little. Spotted a mistake? Tell us and we will read it again.
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