Kastra logo

Best Alternatives to Kastra

12 honest alternatives – every field labelled, no fake scores.

About Kastra

Control what your AI is allowed to do. Sub-millisecond authorization for every prompt, tool call, shell command, and API request.

Best for: Organizations seeking to implement strict authorization controls for their AI systems and requiring rapid policy decision-making.

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When to look for an alternative

Not for:

Small businesses or individual developers who may not have complex AI authorization needs.

Known limitation:

Lack of visible pricing information and no detected free plans or trials, which may limit accessibility for potential users. (AI-inferred; may be outdated – founders can correct this)

AI-inferred from public information – may be outdated. Founders can correct.

12 Alternatives to Kastra

Security & Auth
Clerk logo
Clerk
Security & Auth

The easiest way to add authentication and user management to your application.

Free planFree trial
Cloudflare logo
Cloudflare
Security & Auth

Welcome to Cloudflare - Powering the next generation of applications

Free planFree trial
1Password logo
1Password
Security & Auth

Protect passwords and secrets, manage app access, and secure AI tools with 1Password. Easy to adopt from growing teams to enterprise.

Free trial
Bitwarden logo
Bitwarden
Security & Auth

Bitwarden is the most trusted password manager for passwords and passkeys at home or at work, on any browser or device.

Free planFree trial
Hypefury logo
Hypefury
Security & Auth

Bot Verification is a tool aimed at ensuring the authenticity of bot interactions, although specific details about its features and capabilities are not provided.

Constellation Gate AI logo
Constellation Gate AI
Security & Auth

Point your AI agent at Gate. Inherit prompt-injection defense, secret scanning, and a verifiable audit trail. Save tokens automatically. No code changes.

Free planFree trial
Korrald logo
Korrald
Security & Auth

Korrald scans the web for photos of you used without permission and helps you request their removal. Join the waitlist — 500 founder spots, 67% off for life.

from $4.99
Plexa logo
Plexa
Security & Auth

Scan, monitor and improve your website security, SEO, performance, accessibility and compliance.

Auth0 logo
Auth0
Security & Auth

Secure users, AI agents, and more with Auth0, an easy-to-implement, scalable, and adaptable authentication and authorization platform.

Proton logo
Proton
Security & Auth

Over 100 million people use Proton to stay private and secure online. Get a free Proton account and take back your privacy.

Free plan
Domain Scan Tools logo
Domain Scan Tools
Security & Auth

Scan, check and monitor SPF, DKIM, DMARC, SSL certificates, security headers, HTTPS, HSTS, DNSSEC, uptime and more. One dashboard for all your domains.

from €9
Dashlane logo
Dashlane
Security & Auth

Dashlane Password Manager safeguards businesses & people with easy-to-use, powerful features.

Free planFree trial
How we sourced this: Alternatives are tools in the same category as Kastra listed on directree. Tool details are a mix of observed facts (crawled from each site) and AI-inferred fields (always labelled). No fake precision scores. Founders can submit and claim their listing to correct any field.