Visibility in this ranking can be paid for. Payment gives a vendor more visibility, higher up on the review pages; it never adds a vendor, and it never changes a word of the review. The largest vendors in API security software
cannot hold places 1 to 3. Places 1 to 3 go to challengers, vendors outside the best-known brands in a category,
wherever the category has them; the established names follow from place 4 in their ranked order. How it works: placement disclosure ·
editorial process.
The 13 tools, reviewed
#1 APIsec
Automated attack testing for APIs, priced per endpoint · United States · apisec.ai
Published prices Free account Pre-production testing
APIsec earns the top slot by being the only product in this ranking whose tier prices a buyer can read, multiply and put in a budget without a form. An endpoint is defined as one path and method pair, so GET /user counts once, and plans scale in blocks of 100.
- Pricing: Per 100 endpoints. Free account at $0. Free plan: free plan.
- Best for: Teams testing APIs before release
- Strengths: Business-logic attack tests (BOLA, RBAC); Continuous API testing; Application model.
Where it falls short
It tests; it does not sit in the traffic path, so nothing here blocks an attacker in production.
Wrong for
Wrong for a security team whose first problem is not knowing which APIs exist, or one that needs inline blocking and bot defense.
Visit APIsec →
#2 Escape
Business-logic-aware DAST and AI pentesting from France · France · escape.tech
French company DAST AI pentesting
Escape's terms name Escape Technologies as a French company registered in Bayonne with its principal place of business in Biarritz, which makes it the only vendor here a European procurement office can contract without a transatlantic data clause.
- Pricing: Quote only. No public figures. Free plan: none.
- Best for: EU buyers wanting business-logic DAST
- Strengths: Business-logic-aware DAST; AI pentesting; External network pentesting.
Where it falls short
The headline pitch is now offensive security broadly, so API-specific depth competes for attention with pentesting and external scanning.
Wrong for
Wrong for a company that wants a live request filter or published price tiers to compare.
Visit Escape →
#3 StackHawk
Dynamic API testing that runs in the developer's pipeline · United States · stackhawk.com
Developer-first $10 entry CI/CD
StackHawk is the cheapest way here to get working dynamic tests into an engineering team's routine. Wingman is priced per person with unlimited apps, and the page lists support for Claude Code, Cursor, GitHub Copilot, Codex and Antigravity, so the scan fires from the coding agent before a pull request opens.
- Pricing: Per user / month. Wingman is $10 per user per month with a 14-day trial and 50 scans per user per month. Free plan: free trial.
- Best for: Developers testing APIs in CI
- Strengths: API discovery from source code; OpenAPI spec generation; REST, GraphQL and gRPC testing.
Where it falls short
It is a pre-production tester. There is no production traffic analysis, no shadow API detection from live calls and no blocking.
Wrong for
Wrong for a security team inheriting a sprawling estate with no specs and no developer buy-in, where discovery from traffic matters more.
Visit StackHawk →
#4 42Crunch
OpenAPI contract auditing, scanning and runtime enforcement · United Kingdom · 42crunch.com
OpenAPI-first UK-based Contract audit
42Crunch treats the API contract as the security policy. An audit runs more than 300 automated checks against the OpenAPI file itself before a request is sent, a scan then exercises the live service, and the same contract drives a protective layer at runtime.
- Pricing: Quote only. Enterprise pricing is scoped to the organization. Free plan: free trial.
- Best for: Teams that maintain OpenAPI contracts
- Strengths: OpenAPI contract audit (300+ checks); Dynamic scan against OWASP API Top 10; API runtime protection.
Where it falls short
Value depends on having decent OpenAPI documents.
Wrong for
Wrong for a team without any API specifications, or one wanting traffic-based discovery of shadow endpoints first. Cequence or Levo.ai start from live traffic instead.
Visit 42Crunch →
#5 Wallarm
API discovery and inline blocking with a free evaluation tier · United States · wallarm.com
Free tier Inline blocking US or EU cloud
Wallarm's documentation describes a Security Edge free tier where a team signs up in the US or EU cloud, points a host at an edge node and protects up to 500,000 requests a month without hosting a node itself. Edge nodes start in monitoring mode, so the first week produces findings rather than outages.
- Pricing: Free tier + quote. Security Edge Free Tier covers up to 500,000 requests per month. Free plan: free plan.
- Best for: Teams wanting inline API blocking
- Strengths: API discovery and inventory; BOLA and enumeration protection; GraphQL protection.
Where it falls short
The marketing site returned a block page to automated requests, and paid prices were not available from the vendor's docs, so a budget needs a call.
Wrong for
Wrong for a team that only wants pre-release testing and no production component, or one that needs published enterprise pricing for procurement.
Visit Wallarm →
#6 Levo.ai
Runtime API inventory, testing and protection from live traffic · United States · levo.ai
Runtime discovery Per endpoint Air-gapped option
Levo starts from what the system actually does. Its sensors observe live API traffic, then derive an inventory, generated documentation, sensitive data locations and test cases from it, which suits a company whose services outpaced its specifications.
- Pricing: Per endpoint (quote). Custom quote based on the number of API endpoints secured. Free plan: none.
- Best for: Estates with undocumented services
- Strengths: API inventory; API documentation generation; Sensitive data discovery.
Where it falls short
No tiers, no numbers and no free account mean a quote is the first step.
Wrong for
Wrong for a small team wanting to start with a credit card, or one with excellent OpenAPI specs already.
Visit Levo.ai →
#7 Data Theorem
API discovery, testing and WAF-linked protection with mobile roots · United States · datatheorem.com
Mobile and API REST to gRPC Quote only
Data Theorem's API Secure page lists discovery of REST, GraphQL, gRPC, SOAP and serverless APIs, including those nobody inventoried, and ingests cloud accounts and gateways as sources. Its AI Exploits feature chains separate findings into the path an attacker would follow, and runtime protection pushes a rule to the buyer's existing WAF rather than replacing it.
- Pricing: Quote only. Pricing page is a demo request form; no figures published. Free plan: none.
- Best for: Mobile-heavy companies with many API types
- Strengths: Discovery of REST, GraphQL, gRPC, SOAP and serverless APIs; AI-chained exploit paths; Runtime protection via existing WAF.
Where it falls short
Everything is demo-gated: no prices, no visible trial and no public tier list. The platform spans mobile, cloud and code security, so buying only the API module may mean working through product bundles.
Wrong for
Wrong for a company with no mobile footprint wanting a lightweight API tester, or for buyers without a WAF to receive pushed rules.
Visit Data Theorem →
#8 Cequence
API posture, testing and bot defense in one platform · United States · cequence.ai
API and bots 200+ risk rules Santa Clara
Cequence pairs API security with bot management, WAF and DDoS protection under one vendor, which matters where abusive automation and API flaws arrive together, as in credential stuffing against a login endpoint.
- Pricing: Quote only. No price published; the site routes to demos and datasheets. Free plan: none.
- Best for: Enterprises merging API and bot control
- Strengths: API discovery and inventory; API security posture management; API security testing.
Where it falls short
Pricing is invisible and the site is organized around platforms, so a buyer wanting only API testing must pick through bot and agent governance pages.
Wrong for
Wrong for a startup that needs a card-based start or has no abuse problem.
Visit Cequence →
#9 Salt Security
API discovery and behavioral attack blocking, now framed for AI agents · United States · salt.security
API-only vendor Behavioral detection Free assessment
Salt describes itself as built for APIs only and says it has secured APIs since 2016. Its platform is split into named modules: Surface for external exposure, Code for policies inside AI coding agents, Connect for cloud inventory, Collect for live traffic analysis and Protect for blocking logic-based attacks.
- Pricing: Quote only. No price published; the site offers a demo and a free API attack surface assessment. Free plan: none.
- Best for: Large estates needing behavioral detection
- Strengths: Salt Surface external exposure mapping; Salt Code policy enforcement; Salt Connect cloud API inventory.
Where it falls short
Messaging has moved to securing agentic AI, so the API-security buyer sees agent, MCP and LLM language first. Costs are not shown, and the modular layout makes it hard to tell which parts the entry quote includes.
Wrong for
Wrong for a team under ten developers or a buyer who needs published pricing.
Visit Salt Security →
#10 Traceable
API discovery, testing and protection inside the Harness platform · United States · traceable.ai
Part of Harness API data lake Quote only
Traceable's site reads as a platform with three layers: posture management with continuous discovery of APIs and MCP tools, security testing meant to run from code to runtime, and protection of live traffic. A distinctive claim is an API security data lake in which captured activity is kept and correlated over time for threat hunting, a feature most rivals describe less concretely.
- Pricing: Quote only. No price published; the site routes to a demo request. Free plan: none.
- Best for: Harness customers consolidating DevSecOps
- Strengths: Application and API posture management; Application and API security testing; Application and API protection.
Where it falls short
Ownership by a larger platform company can mean packaging that follows the parent's roadmap, and standalone pricing is not shown. The brand page emphasizes enterprise verticals such as banking and government.
Wrong for
Wrong for a small business with no CI/CD platform from the same parent, or one wanting self-serve pricing.
Visit Traceable →
#11 Cloudflare API Shield
Schema validation and mutual TLS at the Cloudflare edge · United States · cloudflare.com
Edge enforcement Enterprise add-on Schema validation
Cloudflare's documentation says its API security products are Enterprise-only, with mutual TLS the exception that anyone can set up using a Cloudflare-managed certificate authority. Schema Profiles come in two sources: Schema Learning derives expected behavior from traffic, and Schema Validation takes uploaded OpenAPI files. Enforcement then happens at the edge in front of the origin, so rejected calls never reach the application.
- Pricing: Enterprise add-on. Enterprise paid add-on. Free plan: none.
- Best for: Existing Cloudflare Enterprise customers
- Strengths: Schema learning from traffic; Schema validation with OpenAPI files; Mutual TLS with managed CA.
Where it falls short
It cannot be bought alone: an Enterprise contract is the entry, and the closed beta for customers without the API Security product is invitation-only.
Wrong for
Wrong for a team not already on Cloudflare Enterprise, or one wanting to test APIs before release.
Visit Cloudflare API Shield →
#12 Imperva API Security
API discovery and BOLA detection attached to Imperva WAFs · United States · imperva.com
WAF-linked Hybrid deployment Thales group
Imperva's page says its platform handles discovery, risk assessment, detection and mitigation in one console across cloud, on-premises and hybrid environments. Detection mixes behavioral and rule-based engines to score anomalies, while response runs through Cloud WAF and WAF Gateway so a flagged endpoint can be blocked inline. The page also cites a KuppingerCole Leadership Compass for API security and management.
- Pricing: Quote only. No price published; the site routes to a demo. Free plan: none.
- Best for: Existing Imperva WAF customers
- Strengths: Continuous API discovery; Shadow API detection; OWASP API Top 10 risk assessment.
Where it falls short
Best value comes from owning an Imperva WAF. There is no free tier, no price list and no pre-release testing module on the page. Teams outside the Imperva estate give up the strongest part of the pitch.
Wrong for
Wrong for a team without an Imperva WAF or one wanting developer-side tests.
Visit Imperva API Security →
#13 Akamai API Security
API discovery, posture, detection and testing from Akamai · United States · akamai.com
Edge vendor 200+ tests Hybrid
Akamai's page describes four stages: discovery across traffic, code, specs and connected infrastructure; posture and compliance checks against OWASP API, PCI DSS, HIPAA and GDPR; runtime analysis for abuse and business-logic risk; and testing with more than 200 tests in CI/CD and preproduction. A native connector sends Akamai Cloud traffic for analysis, and findings route to SIEM, ticketing and WAAP tools.
- Pricing: Quote only. No price listed for API Security; the page offers a demo and an assessment, and links to pricing only for cloud products. Free plan: none.
- Best for: Large enterprises already on Akamai
- Strengths: API inventory across traffic, code and specs; Shadow and zombie API detection; Posture and sensitive data exposure.
Where it falls short
Costs are undisclosed, and the full value assumes Akamai edge services. The offering is large, so a small team will find it heavy.
Wrong for
Wrong for a small team or startup.
Visit Akamai API Security →
Questions and answers
What is the best API security software in 2026?
APIsec ranks first of 13, best for teams testing APIs before release. Escape is second (eU buyers wanting business-logic DAST) and StackHawk third (developers testing APIs in CI). Places 1 to 3 go to challengers, vendors outside the best-known brands, wherever the category has them.
What is the difference between API security testing and runtime protection?
Testing runs before release against a staging service or a specification and reports flaws a developer can fix. Runtime protection sits in or beside production traffic, learns normal behavior and blocks abuse as it happens.
Do I still need a WAF if I buy an API security tool?
Usually yes. A web application firewall looks for known payload patterns such as injection strings, while API tools look for misuse of valid requests, such as one user reading another's record.
How do these tools find shadow APIs nobody documented?
They read the places where endpoints leave traces: network or gateway traffic, cloud account configuration, source code repositories and uploaded specifications.
What does BOLA mean and which tools test for it?
BOLA stands for broken object level authorization: a logged-in user changes an identifier and receives data that belongs to someone else.
Is API security priced per endpoint or per user?
Both appear. APIsec and Levo.ai price on endpoints, and APIsec's rate is $690 a month per 100 on Standard. StackHawk's Wingman plan is $10 per user per month. Wallarm's free tier counts requests, capped at 500,000 monthly.
Can a small team start without talking to sales?
Yes, with a short list. APIsec has a free account and published tiers, StackHawk offers a 14-day trial for $10 per user thereafter, Wallarm's docs describe a free-tier sign-up, and 42Crunch lists a 14-day trial for its AI coding plugins.
Is there a European option with EU hosting?
Escape's terms identify a French company in Biarritz, and 42Crunch lists a London address. Wallarm's docs let new customers sign up in a US or EU cloud.
How do these tools handle GraphQL and gRPC?
Coverage varies by vendor. StackHawk lists GraphQL and gRPC testing use cases, Data Theorem discovers REST, GraphQL, gRPC and SOAP, Wallarm documents GraphQL protection, and Escape and 42Crunch both list GraphQL security pages.
Do API security tools cover MCP servers and AI agents?
Several now do. 42Crunch markets MCP server discovery and an OWASP MCP Top 10 mapping, Wallarm lists MCP sessions and mitigation controls, Levo.ai offers MCP discovery and testing, and Salt and Traceable describe MCP discovery.
Will an inline tool block legitimate traffic on day one?
Not if it is introduced properly. Wallarm's documentation says Security Edge nodes start in monitoring mode, so requests are logged and flagged rather than blocked.
