Vijil
Vijil is an AI agent security platform for enterprises. Evaluate agents before deployment, protect them at runtime, and improve them continuously.
Reviewed by Mathijs Bronsdijk · Updated Apr 13, 2026

What is Vijil?
Vijil is an AI agent trust platform designed to help enterprises evaluate, protect, and continuously improve AI agents across their full lifecycle. It targets the gap between building agents quickly and deploying them safely with tools that work before deployment, during production, and over time through adaptive learning. The platform is built for organizations where agent reliability and safety are non-negotiable, including teams responsible for compliance and developers shipping agents into critical roles. Vijil was recognized as a Gartner Cool Vendor in 2025 and named among CB Insights' Most New Startups in 2025.
Key Features
- Diamond: Evaluates agent behavior against hundreds of scenarios, testing for reliability, resistance to prompt injection, and compliance with safety policies before an agent goes live.
- Dome: Provides real-time guardrails during production, filtering harmful inputs and outputs, detecting anomalies, and enforcing policies as agents operate.
- Darwin: Continuously improves agents after deployment by applying reinforcement learning from production telemetry and validation results, so agents adapt to real-world conditions over time.
Use Cases
- Enterprise AI Developers: Teams building and deploying AI agents for critical business roles use Vijil to validate agent behavior before launch, reducing the risk of unsafe agents reaching production.
- Compliance Officers: Organizations that need AI agents to meet regulatory standards use Vijil to verify that agents operate within defined safety policies, producing documented compliance evidence.
Strengths and Weaknesses
Strengths:
- Users report that Vijil helps enterprises deploy trusted agents 4x faster than without the platform.
- The platform covers the entire agent lifecycle, from pre-deployment evaluation through runtime protection to continuous improvement, in one place.
- Rated 4.5 on G2 across 142 reviews, indicating consistent satisfaction among enterprise users.
- Open-source components (Dome is available on GitHub under the Apache-2.0 license) give technical teams visibility into how guardrails work.
Weaknesses:
- Some users report that the setup process is complex, which may slow initial adoption.
- Paid pricing tiers are not publicly listed and is difficult to evaluate cost before contacting sales.
Pricing
- Free: $0, available on an ongoing basis. Accessible by signing up at vijil.ai/try-vijil with no time limit indicated.
Paid tier pricing is not publicly listed. Interested teams can schedule a demo through the Vijil website to discuss enterprise plans.
FAQ
What is Vijil?
Vijil is an AI agent trust platform that helps enterprises evaluate, protect, and continuously improve AI agents across their full lifecycle. It is designed for organizations where agent reliability and safety are non-negotiable, including compliance teams and developers deploying agents into critical roles.
What does Vijil do?
Vijil provides tools that work before deployment, during production, and over time through adaptive learning. Its three core products are Diamond (pre-deployment evaluation), Dome (real-time runtime guardrails), and Darwin (continuous post-deployment improvement).
What is Diamond?
Diamond evaluates agent behavior against hundreds of scenarios before an agent goes live, testing for reliability, resistance to prompt injection, and compliance with safety policies.
What is Dome?
Dome provides real-time guardrails during production, filtering harmful inputs and outputs, detecting anomalies, and enforcing policies as agents operate. It is open-source and available on GitHub under the Apache-2.0 license.
What is Darwin?
Darwin continuously improves agents after deployment by applying reinforcement learning from production telemetry and validation results, allowing agents to adapt to real-world conditions over time.
Who is Vijil built for?
Vijil targets enterprise AI developers building agents for critical business roles and compliance officers who need agents to meet regulatory standards. It is designed for teams where agent reliability and safety are non-negotiable.
How does Vijil help compliance teams?
Vijil verifies that agents operate within defined safety policies and produces documented compliance evidence. This helps organizations meet regulatory standards for AI agent behavior.
Has Vijil received any industry recognition?
Vijil was recognized as a Gartner Cool Vendor in 2025 and named among CB Insights' Most New Startups in 2025.
How is Vijil rated by users?
Vijil holds a 4.5 rating on G2 across 142 reviews, indicating consistent satisfaction among enterprise users.
How much faster can teams deploy agents using Vijil?
Users report that Vijil helps enterprises deploy trusted agents 4x faster than without the platform.
Is any part of Vijil open source?
Dome, Vijil's runtime guardrails product, is available on GitHub under the Apache-2.0 license. This gives technical teams visibility into how the guardrails work.
What are the known limitations of Vijil?
Some users report that the setup process is complex, which may slow initial adoption. Paid pricing tiers are not publicly listed and is difficult to evaluate cost before contacting sales.
How much does Vijil cost?
Vijil offers a free tier at $0 with no time limit, accessible by signing up at vijil.ai/try-vijil. Paid tier pricing is not publicly listed, and interested teams must schedule a demo to discuss enterprise plans.