Compare Casbin and realstamp on pricing, features, platforms, and ratings — both Security tools, Free/Open-source vs Freemium with a Free tier (10…
At a Glance
Casbin
realstamp
Primary category
Security
Security
Rating
Not documented
Not documented
Pricing model
Free/Open-source
Freemium with a Free tier (10 stamps/month), Creator at $9/month or $89/year for individuals, Business at $99/month or $990/year for teams, and a $2,500/90-day Compliance Pilot for organizations needing EU AI Act Article 50 readiness.
Starting price
Free
Not documented
Free plan
Not documented
Yes
Free trial
Not documented
Not documented
Platforms
Not documented
iOS, Android, Browser Extension
Team collaboration
Not documented
Not documented
AI features
Not documented
Not documented
Public API
Yes
Yes
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Casbin
No individual plan breakdown documented yet.
realstamp
No individual plan breakdown documented yet.
Pros & Cons
Casbin
Pros
Framework- and language-agnostic authorization model usable across polyglot codebases
Mature and widely adopted in production, with 20,000+ GitHub stars on the core repository
Flexible enough to model ACL, RBAC, and ABAC without rewriting application logic
Backed by Apache Software Foundation incubation for open governance
Free and open source with no licensing cost
Cons
Requires developers to learn its model/policy configuration syntax
No built-in user interface or hosted service on its own
Documentation depth varies somewhat across the different language SDKs
Fully self-managed, with no vendor support contract available
realstamp
Pros
Biometric Face ID check happens on-device via Secure Enclave, so raw biometric data never leaves the user's device
Stamps are anchored to Sigstore Rekor, giving independent, publicly auditable verification rather than a closed proprietary log
Generous free tier (10 stamps/month) makes it easy to try before committing to a paid plan
Wide integration surface: iOS/Android apps, WordPress plugin, browser extensions, embeddable SDK, and REST API
Cons
Free plan is capped at 10 stamps per month with only 30-day history, which may be limiting for active creators
Core verification relies on Face ID/Secure Enclave hardware, so support on non-Apple or older devices is unclear
As a newer entrant (patents still pending) it lacks the long track record of established e-signature or authenticity platforms
Higher-tier features like SSO, audit trails, and bulk verification API are gated behind the $99/month Business plan
Use Cases
Casbin
Embedding fine-grained authorization — Adding ACL, RBAC, or ABAC permission checks directly into an application without building custom access control logic from scratch.
Standardizing access control across microservices — Applying a consistent authorization model and policy set across services written in different languages.