Lasso Security vs Promptfoo: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Lasso Security and Promptfoo side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Promptfoo leads on a free plan. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Lasso Security
Secure AI development and deployment for enterprises
Best for you if:
- • You want provides comprehensive visibility into shadow AI and decentralized agent ownership
Promptfoo
Build secure AI applications with AI security testing integrated into your development workflow.
Best for you if:
- • You want a free tier before you commit
| At a Glance | Lasso Security | |
|---|---|---|
Starts at | Not published | Free plan, paid from $50/mo, billed monthly Cloud plan |
Category | Security AI Agents | AI Agents Testing & QA |
Rating | n/a | n/a |
Free plan | No | Yes |
Watch out for | n/a | No public overage pricing for Cloud |
Choose Lasso Security or Promptfoo?
Choose Lasso Security if
- You want provides comprehensive visibility into shadow AI and decentralized agent ownership
- You want offers proactive security through automated red teaming with a vast attack library
- You work in security, not AI agents
Choose Promptfoo if
- You want a free tier before you commit
- You want LLM eval framework
- You want open source
- You work in AI agents, not security
In-Depth Analysis
Lasso Security
Secure AI development and deployment for enterprises
Strengths
- Pro: Provides comprehensive visibility into shadow AI and decentralized agent ownership.
- Pro: Offers proactive security through automated red teaming with a vast attack library.
- Pro: Enables real-time policy enforcement and threat detection with high accuracy.
- Pro: Designed for enterprise scale, speed, and cost-efficiency compared to cloud-native guardrails.
- Pro: Aligns with industry standards like NIST and OWASP for compliance.
Weaknesses
- Con: Requires integration into existing CI/CD pipelines and platform infrastructure.
- Con: The complexity of AI security posture management may require specialized expertise.
- Con: Specific pricing details are not publicly available, requiring a demo or direct contact.
Key features
Promptfoo
Build secure AI applications with AI security testing integrated into your development workflow.
The pricing for Promptfoo is very generous, especially with a robust free tier offering unlimited local evals and all features.
Watch out
No public overage pricing for Cloud
Strengths
- Pro: LLM eval framework
- Pro: Open source
- Pro: Good for testing prompts
- Pro: Active development
- Pro: Good documentation
Weaknesses
- Con: Learning curve
- Con: CLI focused
- Con: Newer tool
- Con: Limited features
- Con: Still maturing
Key features
Plans and prices: Lasso Security vs Promptfoo
| Tool | Plans and prices | Source |
|---|---|---|
| Lasso Security | No plan prices on file | lasso.security |
| Promptfoo |
| promptfoo.dev/pricing read Oct 2, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Lasso Security pricing and Promptfoo pricing.
Key Takeaways
Lasso Security
- Choose if you want secure AI development and deployment for enterprises
Promptfoo
- Has a free plan
What the data shows
On the data below, Promptfoo leads on a free plan. We do not name an overall winner for this pair.
- Promptfoo starts at $50/mo, billed monthly; Lasso Security has no public paid plan price on file.
- Only Promptfoo has a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Lasso Security and Promptfoo compare in 2026?
On the data below, Promptfoo leads on a free plan. We do not name an overall winner for this pair. Promptfoo starts at $50/mo, billed monthly; Lasso Security has no public paid plan price on file. Only Promptfoo has a free plan.
What are Lasso Security and Promptfoo used for?
Lasso Security: Secure AI development and deployment for enterprises. Promptfoo: Build secure AI applications with AI security testing integrated into your development workflow.
What does Lasso Security cost vs Promptfoo?
Lasso Security has no public paid-plan price on file. Promptfoo's cheapest paid plan is Cloud at $50/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 2, 2026.
What's the main difference between Lasso Security and Promptfoo?
Lasso Security's main strength: provides comprehensive visibility into shadow AI and decentralized agent ownership. Promptfoo's main strength: LLM eval framework.