Levo.ai

Levo.ai is a runtime security platform for API and AI applications, aimed at organizations managing large or fast-growing API estates. Its combination of passive discovery, CI/CD testing, and runtime controls is compelling; endpoint-based custom pricing makes it harder to assess cost upfront.

Overview

Levo builds an API catalog from passively captured live traffic, without code changes, and pairs that visibility with security testing and ongoing monitoring. That approach suits teams whose API inventories outgrow what documentation alone can track. Its AI Gateway and AI Firewall extend the platform to AI and LLM traffic, with controls intended to block prompt injection, data leakage, and API abuse in real time.

The product covers discovery, offensive testing, sensitive-data detection, threat detection, vulnerability remediation, and inline protection. That breadth makes Levo more than a scanner, but organizations seeking only a lightweight API test tool may not need a full runtime security platform.

Key features

Discovery and testing

Passive sensors can discover APIs from live traffic without code changes; Levo Live adds a browser extension that captures HTTP traffic from internal applications to find undocumented APIs. Automated OWASP API Top 10 tests can run in CI/CD, and the testing coverage includes authentication, authorization, input validation, and business logic. OpenAPI support accepts YAML or JSON. This mix connects inventory work to development workflows, though the stated format support is focused on OpenAPI.

Runtime and AI security

Continuous monitoring, threat detection, vulnerability remediation, and inline protection address risks after deployment as well as before release. Levo says it detects PHI, PII, and secrets in API payloads, AI prompts, embeddings, and vector queries without sending them to the cloud—a meaningful design choice for sensitive data. Its AI Gateway and AI Firewall are intended to govern AI and LLM API traffic and block prompt injection, data leakage, and abuse in real time.

Deployment and integrations

SaaS, on-premises, hybrid, and air-gapped deployment options give security teams flexibility to match infrastructure and data-handling needs. Integrations include Okta, Microsoft Entra ID, Splunk, IBM QRadar, Jira, Linear, Slack, VS Code, Cursor, Jenkins, GitHub Actions, and Bitbucket Pipelines. Support ranges from self-service to dedicated security liaisons and custom SLAs, which can suit teams with differing operational needs.

Pricing

Levo uses a freemium model with a free plan and custom pricing for paid use. The custom plan is priced per API endpoint and supports SaaS, on-premises, hybrid, or air-gapped deployment; support is scoped to the customer’s needs. Levo says it has no rigid tiers or hidden limits, but endpoint-based pricing and a request for pricing mean teams must establish their expected cost with the vendor before budgeting. The free plan’s cap and inclusions are not defined, so it is difficult to judge how far it can support a production evaluation.

Platforms

Levo supports API, browser extension, Linux, macOS, self-hosted, web, and Windows environments. The browser extension has a distinct role in capturing traffic from internal apps; the range of deployment models is especially useful for teams that cannot route sensitive traffic through a SaaS service.

Who it's for

Levo is best suited to API-heavy and AI-native organizations that need discovery, testing, and runtime protection in one platform. The company describes support for estates from 1K to 100K+ endpoints, suggesting a focus that spans substantial growth rather than a narrowly scoped API project. Teams with sensitive payloads, air-gapped requirements, or AI traffic to govern have particular reasons to consider it. Smaller teams seeking a clearly priced, limited scanner may prefer a simpler alternative.

Pros and cons

• Pros: Passive discovery builds an API catalog without code changes, helping expose undocumented assets.
• Pros: CI/CD testing and runtime controls cover multiple stages of API security, including authentication, authorization, input validation, and business logic.
• Pros: Detection of PHI, PII, and secrets without sending them to the cloud, alongside air-gapped deployment, addresses stringent data-handling needs.
• Cons: Custom endpoint-based pricing gives buyers no clear upfront cost for a particular deployment or estate size.
• Cons: The free plan’s limits and scope are unclear, making it difficult to know whether it can support a meaningful evaluation.

Alternatives

API Security Testing Software is the broader category to explore when comparing tools for this job.

• Pynt is a fit for teams that want a free starting point capped at 10 API endpoints and limited API security testing, with a paid Business plan available at custom pricing.
• Schemathesis is a more focused choice for free, open-source test generation from OpenAPI and GraphQL schemas.
• APISec Platform offers a free plan billed at $0 forever, with no credit card required, for public API testing and basic test simulations.
• 42Crunch API Security Platform is worth considering for its free AI coding plugin, OpenAPI audit, vulnerability scans, and automatic fixes.
• Akto API Security Platform is another freemium API security option with usage-based pricing through sales.
• AquilaX API Security Scanner offers a free plan with unlimited scans, secrets scanning, PII detection, compliance auditing, and CI/CD and IDE integrations.
• Operator offers a self-serve first scan covering one domain, with annual assessments also priced by quote.
• ZeroThreat offers a free entry point with five scan credits on sign-up, valid for 15 days, then one scan credit per month for one target per account.

Verdict

Choose Levo.ai if your team needs to discover undocumented APIs, test them in delivery pipelines, and govern API and AI traffic at runtime, especially when deployment or data-handling constraints matter. Its breadth and flexible deployment are the strongest reasons to choose it. Look elsewhere if you need a transparent paid price or a free plan with clearly defined evaluation limits.