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Custodyn.app VS StackBlitz

Compare Custodyn.app VS StackBlitz and see what are their differences

Custodyn.app

Runtime security and trust infrastructure for AI agents: Policy enforcement, human approvals, and tamper-evident audit logs for every AI agent action. Stop runaway agents before they cause real damage. The security layer your AI agents are missing.

Custodyn.app Custodyn in Action
Rating
0 reviews
Pricing
Open source Freemium Free trial $49 / Monthly
Alternatives Is it good?
StackBlitz

Online VS Code Editor for Angular and React

StackBlitz Landing page
Rating
5.0 · 1 review
Pricing
Open source
Alternatives Is it good?
OmniDeck Pro
Sovereign In-Browser Workstation, 50+ Local RAM Utilities & 150+ 4K Wallpapers sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, StackBlitz seems to be more popular. It has been mentioned 112 times since March 2021.

social mentions
0 vs 112
AI Agents popularity
100% vs 0%
alternatives listed
11 vs 240+

Base details

Website, pricing, platforms and company facts side by side.

Custodyn.app
StackBlitz
Website custodyn.app stackblitz.com
Pricing
Open source Freemium Free trial $49 / Monthly Official pricing
Open source
Company Startup from India · 2026 —
Listed in
AI Agents LLM Security Return Policy Generator AI Gateway Audit Trail Auditing And Compliance AI +4
Text Editors Programming Programming Tools IDE +1

About Custodyn.app and StackBlitz

In their own words, as submitted to SaaSHub.

Custodyn.app
StackBlitz

Custodyn is a runtime security and trust infrastructure platform for AI agents. As AI agents become autonomous — executing code, sending emails, making API calls, and taking real-world actions without human oversight — the security risks are real and largely ungoverned. Custodyn sits inside agent...

Read more about Custodyn.app

No description of StackBlitz yet.

Features and specs

What each product offers, as listed by its team.

Custodyn.app 5 features
StackBlitz 6 features
  • Policy Enforcement Engine
    Define exactly what your AI agents can and cannot do. Block dangerous actions automatically before they execute.
  • Human Approval Queues
    Risky agent actions pause and wait for human sign-off before proceeding. Full control stays with your team.
  • Multi-Framework SDK
    Drop-in Python and JS SDKs with integrations for LangChain, CrewAI, AutoGen, MCP, Claude Code, and OpenAI Agents SDK.
  • Open-Core Model
    MIT licensed SDK for developer adoption. Paid SaaS platform for teams that need policy management, dashboards, and compliance.
  • Tamper-Evident Audit Logs
    Every agent action — allowed, blocked, or approved — is logged in a cryptographically verifiable audit trail. SOC2 ready.
  • Speed
    StackBlitz is known for its quick load times and fast editing capabilities, making it ideal for rapid development and testing.
  • Ease of Use
    The interface is intuitive and user-friendly, allowing developers to get started quickly without a steep learning curve.
  • Zero-Setup
    Users can write, compile, and run code directly in the browser without any setup or configuration required.
  • Integrations
    StackBlitz integrates seamlessly with GitHub, allowing for easy import and export of repositories.
  • WebContainers
    StackBlitz uses WebContainers to run Node.js applications in the browser, providing a near-native development experience.
  • Collaboration
    Real-time collaboration features allow multiple users to work on the same project simultaneously, similar to Google Docs.

Possible disadvantages

  • Limited Plugins
    Unlike traditional IDEs like VSCode or IntelliJ, StackBlitz has a limited ecosystem of plugins and extensions.
  • Online Dependency
    StackBlitz requires an internet connection to function, which can be a limitation for developers who need to work offline.
  • Performance
    For very large projects or those requiring extensive computational resources, performance may degrade compared to local development environments.
  • Mobile Accessibility
    While StackBlitz is accessible on mobile devices, the user experience is not as optimized as it is on desktop browsers.
  • Limited Framework Support
    Although StackBlitz supports many popular frameworks, it doesn't support all frameworks or versions, which could be limiting for some projects.
  • Storage and Persistence
    Files and data are stored in the cloud, which might raise concerns around data privacy and persistence for some users.

Videos

Walkthroughs and reviews on video.

Custodyn.app 0 videos + Add
StackBlitz 2 videos + Add

No Custodyn.app videos yet. You could help us improve this page by suggesting one.

StackBlitz - Online Code Editor For Angular and React - Introduction

More videos

  • Review - Using Stackblitz for html css javascript, make websites, web development

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Custodyn.app
StackBlitz
100% 100%
AI Agents
0% 0%
0% 0%
Text Editors
100% 100%
100% 100%
AI Gateway
0% 0%
0% 0%
Programming
100% 100%

Questions & Answers

As answered by people managing Custodyn.app and StackBlitz.

Why should a person choose your product over its competitors?

Custodyn.app's answer

Most AI security tools sit outside the agent — monitoring network traffic or endpoint activity. Custodyn sits inside the agent code itself. It's developer-first, open-core, and self-serve — pip install or npm install and you're running in minutes. No demo call, no sales process. The MIT licensed SDK means developers adopt it freely, the paid platform gives teams policy management, dashboards, and audit compliance.

What's the story behind your product?

Custodyn.app's answer

Built by a solo founder with 15+ years in information security and penetration testing. In early 2026, AI agents started taking real-world autonomous actions with no security layer governing them. The July 2026 incidents — OpenAI agent breaching Hugging Face infrastructure, Anthropic's agentic misalignment report — confirmed the problem was real and urgent. Custodyn was built to be the security layer AI agents were missing.

What makes your product unique?

Custodyn.app's answer

Custodyn is the only AI agent security platform that works at the SDK layer — embedded directly inside agent code. Unlike endpoint-based solutions, Custodyn intercepts actions inside custom LangChain, CrewAI, and AutoGen pipelines that no endpoint sensor can reach. Human-in-the-loop approval queues mean dangerous actions wait for human sign-off before executing — not just blocked or allowed, but genuinely governed.

How would you describe the primary audience of your product?

Custodyn.app's answer

Developers and security teams building production AI agent systems using LangChain, CrewAI, AutoGen, OpenAI Agents SDK, MCP, or Claude Code — who need runtime governance, human oversight, and audit trails before deploying agents in high-stakes environments.

Which are the primary technologies used for building your product?

Custodyn.app's answer

Python Flask (backend) SQLite (database) Python SDK (PyPI) JavaScript SDK (npm) Railway (deployment) Razorpay (billing)

Who are some of the biggest customers of your product?

Custodyn.app's answer

No enterprise customers yet - pre-revenue, currently seeking first customers and open to acquisition

User comments

Share your experience with using Custodyn.app and StackBlitz. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Custodyn.app no reviews yet
StackBlitz 5.0 · 1 review

We have no reviews of Custodyn.app yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Custodyn.app 0 mentions
StackBlitz 112 mentions

Tracking Custodyn.app since Aug 2026.

  • RS-X: Framework-agnostic reactive state and expressions for JavaScript/TS
    Managing reactive state and dependent computations in JavaScript can get complex, especially when combining asynchronous and synchronous data. RS-X is a library that allows you to bind expressions to plain objects and makes the parts of... - Source: Hacker News / 7 months ago
  • Show HN: I combine Htmx, LiveView and SolidJS for interactive server components
    I like htmx, LiveView, React and Solid. They are great at different points, so I try to combine them in Solv (Stateless Offline-capable LiveView) and write a prototype to show the benefits. Solv's main idea is that stateless servers keep... - Source: Hacker News / 10 months ago
  • Show HN: Solv – Stateless Offline-Capable LiveView – Prototype 03
    I like htmx, LiveView, React and Solid. They are great at different points, and this is a prototype trying to combine them. Solv's main idea is that stateless servers keep client's state in a volatile cache. It enables server components... - Source: Hacker News / 10 months ago

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