OWASP ZAP vs ReadyAPI: 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 OWASP ZAP and ReadyAPI side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, OWASP ZAP 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:
OWASP ZAP
Open-source web application security scanner
Best for you if:
- • You want a fully free tool (ReadyAPI requires payment)
ReadyAPI
Automate enterprise-grade API testing from one secure, on-prem platform for faster time to market.
Best for you if:
- • You want unified platform for multiple types of API testing (functional, security, performance)
| At a Glance | OWASP ZAP | |
|---|---|---|
Starts at | Free 100% free | Not published |
Category | Security Testing & QA | Testing & QA API Tools |
Rating | 4.7/5 G2 4.7 14 reviews | 4.4/5 G2 4.4 73 reviews |
Free plan | Yes | No |
Choose OWASP ZAP or ReadyAPI?
Choose OWASP ZAP if
- You want a fully free tool (ReadyAPI requires payment)
- You want free security scanner
- You want good for web apps
- You work in security, not testing & QA
Choose ReadyAPI if
- You want unified platform for multiple types of API testing (functional, security, performance)
- You want low-code interface simplifies test creation and management
- You work in testing & QA, not security
In-Depth Analysis
OWASP ZAP
Open-source web application security scanner
OWASP ZAP's pricing is exceptionally generous, being entirely free.
Strengths
- Pro: Free security scanner
- Pro: Good for web apps
- Pro: Active community
- Pro: CI/CD integration
- Pro: Open source
Weaknesses
- Con: Learning curve
- Con: False positives
- Con: Performance varies
- Con: UI dated
- Con: Configuration needed
Key features
ReadyAPI
Automate enterprise-grade API testing from one secure, on-prem platform for faster time to market.
Strengths
- Pro: Unified platform for multiple types of API testing (functional, security, performance).
- Pro: Low-code interface simplifies test creation and management.
- Pro: Seamless integration with popular CI/CD tools.
- Pro: API virtualization reduces dependencies and accelerates testing.
- Pro: Provides actionable insights through comprehensive reporting.
Weaknesses
- Con: No explicit mention of a free tier, only a free trial.
- Con: Focus on on-prem deployment might not suit all cloud-native teams.
- Con: Requires some scripting knowledge for advanced customization.
Key features
Plans and prices: OWASP ZAP vs ReadyAPI
| Tool | Plans and prices | Source |
|---|---|---|
| OWASP ZAP |
| zaproxy.org read Nov 2, 2026 |
| ReadyAPI | No plan prices on file | smartbear.com/product/ready-api |
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 OWASP ZAP pricing and ReadyAPI pricing.
Key Takeaways
OWASP ZAP
- Has a free plan
ReadyAPI
- Choose if you want automate enterprise-grade API testing from one secure, on-prem platform for faster time to market
What the data shows
On the data below, OWASP ZAP leads on a free plan. We do not name an overall winner for this pair.
- User ratings rest on too few reviews to rank (4.7/5 from 14 reviews for OWASP ZAP, 4.4/5 from 73 reviews for ReadyAPI; we compare ratings only above 20 reviews on both sides).
- Only OWASP ZAP 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 OWASP ZAP and ReadyAPI compare in 2026?
On the data below, OWASP ZAP leads on a free plan. We do not name an overall winner for this pair. User ratings rest on too few reviews to rank (4.7/5 from 14 reviews for OWASP ZAP, 4.4/5 from 73 reviews for ReadyAPI; we compare ratings only above 20 reviews on both sides). Only OWASP ZAP has a free plan.
What are OWASP ZAP and ReadyAPI used for?
OWASP ZAP: Open-source web application security scanner. ReadyAPI: Automate enterprise-grade API testing from one secure, on-prem platform for faster time to market.
What does OWASP ZAP cost vs ReadyAPI?
OWASP ZAP is free. ReadyAPI has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Nov 2, 2026.
What's the main difference between OWASP ZAP and ReadyAPI?
OWASP ZAP's main strength: free security scanner. ReadyAPI's main strength: unified platform for multiple types of API testing (functional, security, performance).