Free (Community plan); paid plans start at $99/month (Professional)
Free
Free plan
Not documented
Not documented
Free trial
Not documented
Not documented
Platforms
Not documented
Not documented
Team collaboration
Not documented
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AI features
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Public API
Not documented
Yes
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
CertKit
Community — Free n/a
Professional — $99/month monthly
Business — $399/month monthly
Enterprise — Custom quote annual or custom
Casbin
No individual plan breakdown documented yet.
Pros & Cons
CertKit
Pros
Free Community tier makes it easy to evaluate the platform's core discovery and monitoring capabilities without cost.
Deployment via a single agent to a wide range of servers and network appliances, without needing ACME configured everywhere, simplifies rollout across heterogeneous infrastructure.
Certificate Transparency-based discovery surfaces forgotten or unauthorized certificates that manual tracking would likely miss.
Generous 90-day free trial on paid tiers with no credit card required lowers the barrier to a full evaluation.
Purpose-built and narrowly focused on certificate lifecycle management rather than being a small feature bolted onto a broader security suite.
Cons
A relatively new product, launched in 2024, with less of a long-term track record than established certificate lifecycle management vendors.
Small company (TrackJS LLC) behind the product means less scale of support and resources compared to larger enterprise security vendors.
Free and entry-level paid tiers cap certificate and agent counts fairly low (2 and 10 respectively), meaning larger organizations will need Business or Enterprise pricing quickly.
Enterprise pricing is custom and not published, requiring a sales conversation for large-scale or multi-tenant deployments.
As with any tool crawling Certificate Transparency logs, discovery is limited to publicly logged certificates and won't surface internal-only or private CA-issued certificates not logged publicly.
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
Use Cases
CertKit
Preventing certificate-expiration outages — IT teams use CertKit's monitoring and automated renewal to eliminate the risk of a forgotten certificate expiring and taking down a production service unexpectedly.
Auditing an organization's full certificate footprint — Security teams use CertKit's Certificate Transparency-based discovery to build a complete inventory of every certificate issued for their domains, including ones issued outside official processes.
Managing certificates across multiple client environments — Managed service providers use CertKit's multi-tenant Enterprise tier to centrally track and automate certificate lifecycle management across many separate client infrastructures.
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.