Crashmire or Promptfoo: which one to choose?
Promptfoo is an open-source command-line tool to evaluate and attack AI applications; it was acquired by OpenAI in 2026. Crashmire is a service independent of any model provider.
| Promptfoo | Crashmire | |
|---|---|---|
| What is tested | Evaluations and attacks configured in YAML files: vulnerabilities, injections, OWASP and NIST presets. | Your agent's behaviour as it is (prompt, tools, rules) when its target is out of reach or someone tries to trick it: does it cross a line? |
| How it works | A tool developers install and run in their continuous integration. | A service: you describe the agent, we replay it on several models and several runs. No access to your systems, nothing to install. |
| Who it is for | Developers and product teams comfortable with the command line. | Executives, risk and compliance, CISOs, business teams deploying an agent; from SMBs to large organisations. |
| What you get | Test results in the tool; the analysis and the fixes remain to be done. | A report for management: flaws with how they happened, tested fixes (before / after), mapping to the AI Act and OWASP, a re-test included. |
| Price | Free open-source core; enterprise offering. | Public prices: online from €490 excl. VAT for an SMB, €4,900 to €25,000 for a large organisation, continuous monitoring from €36,000 a year. |
Comparison written from each vendor's public information, checked in October 2026. Spotted a mistake? Write to us and we will fix it. Source
Choose Promptfoo if…
- your developers want to test every change in their CI
- you have time to write and maintain your scenarios
- being in the OpenAI ecosystem raises no question for you
Choose Crashmire if…
- you want an opinion independent of every model provider
- you compare several models to pick the safest for your case
- the deliverable must speak to management, legal and risk
And both together?
Yes: Promptfoo for developers' automated tests, Crashmire for the independent audit and the check before each release (our API plugs into CI too).
Other comparisons: Giskard · Lakera · a penetration test