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. Nothing else here publishes more of that evidence.
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.
1 of 23for published buying evidence
17%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
No description of how the product was tested or evaluated.
Open sourceRecent product updates
No public changelog or releases page. A buyer cannot tell if this is actively maintained.
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
No test method we could find. No public changelog we could find.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- No test method we could find
- No public changelog we could find
Adversaadversa.ai
7/10website evidenceno price we could read
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
- No price we could find
- No public changelog we could find
Arthurarthur.ai
6.5/10website evidence$60 /mo
Publishes about as much buying evidence as PromptArmor. Actively maintained, unlike PromptArmor.
- 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
Endor Labsendorlabs.com
7/10website evidenceno price we could read
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
- No price we could find
- No public changelog we could find
HiddenLayerhiddenlayer.com
7/10website evidenceno price we could read
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
- No price we could find
- No public changelog we could find
Straikerstraiker.ai
7/10website evidenceno price we could read
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
- No price we could find
- No public changelog we could find
Credalcredal.ai
6/10website evidence$37,200/mo
Publishes about as much buying evidence as PromptArmor. No stated limits we could find, though PromptArmor publishes one.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- No stated limits we could find
- No test method we could find
- No public changelog we could find
Harmonicharmonic.security
5/10website evidenceno price we could read
Publishes less buying evidence than PromptArmor. Actively maintained, unlike PromptArmor.
- You can try it without paying
- Publishes a measured result
- Actively maintained
- No price we could find
- No stated limits we could find
- No test method we could find
Lakeralakera.ai
5.5/10website evidencefree tier
Publishes less buying evidence than PromptArmor. No measured result we could find, though PromptArmor publishes one.
- Price is on the site
- You can try it without paying
- Says what it cannot do
- No measured result we could find
- No test method we could find
- No public changelog we could find
Nomanoma.security
5.5/10website evidenceno price we could read
Publishes less buying evidence than PromptArmor. No price we could find, though PromptArmor publishes one.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- No price we could find
- No test method we could find
- No public changelog we could find
Fiddlerfiddler.ai
4/10website evidenceno price we could read
Publishes less buying evidence than PromptArmor. No price we could find, though PromptArmor publishes one.
- You can try it without paying
- Publishes a measured result
- No price we could find
- No stated limits we could find
- No test method we could find
- No public changelog we could find
Nightfallnightfall.ai
3.5/10website evidenceno price we could read
Publishes less buying evidence than PromptArmor. No price we could find, though PromptArmor publishes one.
- You can try it without paying
- Says what it cannot do
- No price we could find
- No measured result we could find
- No test method we could find
- No public changelog we could find
Pillarpillar.security
3.5/10website evidenceno price we could read
Publishes less buying evidence than PromptArmor. No price we could find, though PromptArmor publishes one.
- You can try it without paying
- Says what it cannot do
- No price we could find
- No measured result we could find
- No test method we could find
- No public changelog 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.
Check a product we have not covered