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Caido

Freemium#16 of 34 in Penetration Testing Software

Caido: An affordable toolkit for interactive web and API penetration testing. Ranked #16 of 34 in Penetration Testing Software by our editors (7.6/10); pricing: Free plan; best for affordable interactive web testing.

7.6/10Editor score

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Caido7.6 Visit Caido

At a glance

Editor score
7.6 / 10
Pricing
Free plan
Best for
Affordable interactive web testing
Free plan
Yes
Founded
2021
Facts checked
20 Sep 2026

Where it wins
- Free plan plus $20 monthly Individual tier
- Interception, replay, filtering and automated attack workflows
- Project organization and finding tracking for security testing
Where it doesn't
- Focused on interactive application testing rather than evidence capture
- Team and Enterprise plan pricing is not shown here
- Not open source, with extensibility provided through plugins

Our verdict on Caido

Caido is a security testing toolkit for penetration testers, bug bounty hunters and security engineers. It proxies and records HTTP and WebSocket traffic, supports interception, request replay and modification, and organizes work around projects, scopes, filters and findings. The product is available across web, Windows, macOS, Linux, a Chrome extension and an API, making it suitable for interactive web and API testing workflows.

Pricing is accessible for individual users. The Basic plan provides up to 2 projects, 7 workflows, 3 plugins and 5 filter presets, along with HTTPQL filtering and core HTTP tools. The Individual plan costs $20 per user per month or $200 per user per year and adds unlimited projects, workflows, plugins, filter presets and installations, plus nightly builds. Team adds shared instances, centralized billing, reassignable licenses and priority support. Enterprise adds unlimited users, purchase orders, reseller readiness and custom integrations.

Caido’s strongest fit is interactive application testing: HTTP and WebSocket interception, history, replay, payload-based automated attacks and HTTPQL filtering support investigation and traffic analysis. Its findings system helps track potential vulnerabilities, while a community plugin ecosystem and integrations with Anthropic, Google, OpenAI and OpenRouter extend the workflow. Caido should suit individuals and teams that want focused web and API testing with flexible project organization. Organizations that require verified evidence capture should consider an alternative with that capability as a central feature.

Your product? Our editors can test Caido in depth and publish a review, labelled as paid · from $149/mo →

Caido pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.

See plans on caido.io

All 4 Caido plans and prices →

Caido fact sheet

Free plan	Yes
Paid from	Not verified
Deployment	Not verified
Web app testing	Yes
API testing	Yes
Network testing	Not verified
Mobile testing	Yes
Finding management	Yes
Evidence capture	Not verified
Deployment	Desktop, Cloud
Platforms	Web, Windows, macOS, Linux, Chrome extension
Support	Community, Docs
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Integrations	4 integrations: Anthropic, Google, OpenAI, OpenRouter
Pricing	Free plan (source)
Website	caido.io
Facts checked	20 Sep 2026

Caido integrations

Caido lists 4 integrations on its own site.

Anthropic
Google
OpenAI
OpenRouter

Alternatives to Caido

See all Caido alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Caido for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Caido is listed in our Penetration Testing Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update