Public price
Found a public price ($0) on the pricing page.
Open sourcePromptArmor alternatives
PromptArmor has a free tier. We found 7.5 out of 10 of the buying evidence we check for. 1 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 securityHow this market looks from public information.
2 of 23for published buying evidence
35%publish a usable price
83%can be tried first
43%publish measured results
65%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 ("Sign up for a free").
Open sourceMeasured customer result
Publishes a supported measurable result ("scores 90%").
Open sourceDocumented limits
Documents where it falls short ("failure mode").
Open sourceTesting method
This scan did not verify a first-party description of the testing method.
Open sourceRecent product updates
This scan did not verify a dated first-party changelog or release history.
Open sourceAsk before you buy
These questions come from the information we could not verify on the public site.
- How were the headline claims tested, and what was the baseline?
- How often is the product updated, and where are releases documented?
Compare the field
Showing 12 of 22 that match your filters.
PromptArmorpromptarmor.com
7.5/10website evidencefree tier
Testing method not verified. Recent updates not verified.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Testing method not verified
- Recent updates not verified
Endor Labsendorlabs.com
9/10website evidencefree tier
Publishes about as much buying evidence as PromptArmor. Shows how it was tested, unlike PromptArmor.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Recent updates not verified
Adversaadversa.ai
7/10website evidencepricing not verified
Publishes about as much buying evidence as PromptArmor. Shows how it was tested, unlike PromptArmor.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Recent updates not verified
Arthurarthur.ai
6.5/10website evidence$60 /mo
Publishes about as much buying evidence as PromptArmor. Actively maintained, unlike PromptArmor.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
HiddenLayerhiddenlayer.com
7/10website evidencepricing not verified
Publishes about as much buying evidence as PromptArmor. Shows how it was tested, unlike PromptArmor.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Recent updates not verified
Straikerstraiker.ai
7/10website evidencepricing not verified
Publishes about as much buying evidence as PromptArmor. Shows how it was tested, unlike PromptArmor.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Recent updates not verified
Credalcredal.ai
6/10website evidence$37,200/mo
Publishes about as much buying evidence as PromptArmor. Product limits not verified, though PromptArmor publishes one.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Product limits not verified
- Testing method not verified
- Recent updates not verified
Fiddlerfiddler.ai
6/10website evidencefree tier
Publishes about as much buying evidence as PromptArmor. Product limits not verified, though PromptArmor publishes one.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Product limits not verified
- Testing method not verified
- Recent updates not verified
Harmonicharmonic.security
5/10website evidencepricing not verified
Publishes less buying evidence than PromptArmor. Actively maintained, unlike PromptArmor.
- You can try it without paying
- Publishes a measured result
- Actively maintained
- Pricing not verified
- Product limits not verified
- Testing method not verified
Lakeralakera.ai
5.5/10website evidencefree tier
Publishes less buying evidence than PromptArmor. Measured results not verified, though PromptArmor publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Measured results not verified
- Testing method not verified
- Recent updates not verified
Nightfallnightfall.ai
5.5/10website evidencepricing published
Publishes less buying evidence than PromptArmor. Measured results not verified, though PromptArmor publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Measured results not verified
- Testing method not verified
- Recent updates not verified
Nomanoma.security
5.5/10website evidencepricing not verified
Publishes less buying evidence than PromptArmor. Pricing not verified, though PromptArmor publishes one.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Pricing not verified
- Testing method not verified
- Recent updates not verified
Zenityzenity.io
5.5/10website evidencefree tier
Publishes less buying evidence than PromptArmor. Measured results not verified, though PromptArmor publishes one.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Measured results not verified
- Testing method not verified
- Recent updates not verified
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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