garak: Open-source LLM vulnerability scanner from NVIDIA that probes for jailbreaks, prompt injection, data leakage and hallucination. These 5 tools cover the same task (red teaming). They are ranked by how many of garak's strongest markets they share, then by how complete their profile is.
Built for larger companies and names 3 security certificates.
Picked from our profile data, which we check against vendor pages. No vendor paid for a placement.
What garak does
garak is an open-source command-line scanner from NVIDIA that tests large language models for security weaknesses, similar to a penetration testing tool, for security and ML teams before and after deployment.
Probes for jailbreaks, prompt injection, encoding attacks and glitch tokens
Detectors score responses and compute failure rates per probe
Supports Hugging Face, OpenAI, AWS Bedrock and REST endpoints
garak is an open-source NVIDIA tool used worldwide that runs locally or in your own CI.
Before you switch: Scans send many requests to the target model, which creates API costs and may hit rate limits. Get approval before scanning third-party services. Results show vulnerability rates, not guarantees, so combine garak with manual red teaming for critical systems.
Lakera secures generative AI applications, AI agents and employee AI use: its runtime protection screens prompts and responses for attacks and data leakage, and AI red teaming tests AI systems through simulated attacks.
Key functions
Real-time detection of direct and indirect prompt injection in more than 100 languages
Protection against data leakage and toxic content for AI agents and employees
Automated and expert-led red teaming for AI applications
Compared with garak
Strong in the same markets as garak: United States.
Check before buying: Since Lakera belongs to Check Point, check which contract entity and legal documents apply. Ask where prompts are processed in the SaaS platform; a self-hosted option was not described on the website when we checked in September 2026. Monitoring employee prompts can reveal behavior, so involve works councils where they exist and check data processing terms.
promptfoo is an open-source command line tool and library for testing prompts, models and RAG pipelines and for red teaming AI applications. Developer teams use it to catch regressions and security issues before a change ships.
Key functions
Evaluates prompts, models and RAG pipelines with test cases
Red teaming simulates prompt injection, jailbreaks and data leaks
Tests run in CI/CD, with remediation guidance in pull requests
Compared with garak
Strong in the same markets as garak: United States.
Check before buying: promptfoo now belongs to OpenAI, so ask about roadmap, contracting entity and terms before planning long-term use of the enterprise platform. The MIT-licensed CLI remains usable independently. Scans call the models under test, which adds API cost and sends test prompts to those model providers.
Giskard tests conversational AI agents for security and quality problems before and after launch, with the enterprise Giskard Hub for continuous red teaming and an open-source library for developers.
Key functions
More than 50 automated adversarial probes including multi-turn attacks
Detection of hallucinations, prompt injection, data disclosure and sycophancy
Evaluation of RAG applications with quality metrics
Compared with garak
Can store data in the EU; garak states no EU option.
Headquartered in France, garak in United States.
Built for larger organizations than garak's smallest customers.
Check before buying: Choose EU hosting or on-premises installation if test conversations contain personal data, and sign a data processing agreement. Giskard Hub is priced on request. Tests call your agent through its API, which creates load and model costs on your side.
Mindgard tests AI models and agents for security weaknesses through automated red teaming and adds runtime protection, for security teams that need to assess AI systems before and after launch.
Key functions
Automated red teaming and security testing for AI models and agents
Reconnaissance that profiles models, agents and tools
Shadow AI discovery and runtime protection
Compared with garak
Headquartered in United Kingdom, garak in United States.
Built for larger organizations than garak's smallest customers.
Strongest elsewhere: United Kingdom.
Check before buying: Mindgard publishes no prices, so request a quote for the number of AI systems you want to test. Test runs call your models, which adds API cost. Clarify where test data and results are stored and request the SOC 2 report and data processing terms.
Toloka supplies human-generated training and evaluation data for AI agents and large language models, drawing on a network of domain experts, for AI labs and companies building their own models.
Key functions
Agent trajectory demonstrations and step-by-step evaluations for training AI agents
Virtual environments for reinforcement learning
Red teaming to test models for vulnerabilities
Compared with garak
Headquartered in Netherlands, garak in United States.
Built for larger organizations than garak's smallest customers.
Names 3 security certificates, garak 0.
Check before buying: Toloka publishes no price list, so define scope and quality targets for a quote. Clarify storage location, since the platform runs on Azure with several options. Check which contributors in which countries see your data and sign a data processing agreement with Toloka AI B.V.
All 5 alternatives by buying criteria
garak alternatives by price, trial, hosting and security
Not stated means we found no statement on the vendor's site. Data as of each profile's last check.
The market around garak: 6 tools for this task
0 % Publish a price (0/6)
67 % Free plan (4/6)
17 % Free trial (1/6)
17 % EU hosting option (1/6)
50 % Headquartered in Europe (3/6)
17 % Single sign-on (1/6)
garak is among the tools that price on request. Most vendors in this category sell through demos and quotes, so ask two or three for an offer on the same scope before you compare.
Source: ai-toolfinder.com dataset, full profiles only.
Why teams look beyond garak
garak quotes prices on request. 1 of the alternatives below have a published pricing model.
garak states no EU hosting option. 1 alternatives can store data in the EU.
2 alternatives are strong in at least one of the same countries as garak, so local support and compliance should be comparable.
It depends on your country and company size. In our data, Lakera, promptfoo and Giskard share the most strong markets with garak, so they are the closest fit if you work where garak is strong. Filter the list by country and size to narrow it down.
Is there a free alternative to garak?
Lakera, promptfoo and Giskard offer a free plan or a free trial according to the vendors. Check the limits of free plans before you rely on them for employee data.
Which garak alternatives can host data in the EU?
Giskard can store customer data in the EU, according to the vendors. Ask for the data processing agreement (Art. 28 GDPR) and the list of subprocessors.
Which garak alternatives publish their prices?
None of the 5 alternatives publishes a price in our data. Ask for quotes on the same scope to compare.
Are there European alternatives to garak?
Giskard, Mindgard and Toloka are headquartered in Europe. A European seat does not guarantee EU hosting, so check the data processing agreement and the list of subprocessors.
Which garak alternatives support single sign-on?
Giskard support single sign-on according to the vendors. Some include it only in higher plans, see the table above.
Lakera