Products
AI Benchmark
Desktop
Mobile
Monthly visits
10.6K
Down37.8%MoMOct 2026
Public revenue
Undisclosed
No public revenue evidence yet
Entry price
$19.99/mo
Lower than 54% of peersNiche median $21.6/mo
Launched
4mo ago
2026-07-09 · Est.

Traffic

Last 12 months
Monthly visitsData through Oct 2026
Events3 marketing moves

Marketing moves

Launches, search & content, referrals, promotions
X accounts@kastralabs
  • Launched on Product HuntLaunch

    Runtime authorization for Claude, Cursor, Codex and OpenClaw

    Jul 22 · 4mo agoLaunch page

  • Launched on Show HN (1 pts)Launch

    Build Rules for Claude Code, Cursor, and Codex — Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool calls and evaluates them against deterministic policies before they ex…

    Jul 13 · 4mo agoLaunch page

  • Launched on Show HN (13 pts · 5 comments)Launch

    Policy enforcement for Claude Code, Cursor, and Codex — Show HN: Runtime authorization for Claude Code, Cursor, and Codex Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool call…

    Jul 9 · 4mo agoLaunch page

Third-party reviews & case dossiers

Acquisition breakdowns, engineer reviews & open-source metrics
Show HN
2026-07-09Source
Post excerpt:
Show HN: Runtime authorization for Claude Code, Cursor, and Codex Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool calls and evaluates them against deterministic policies before they execute. This is aimed at developers using coding agents like Claude Code, Codex, Cursor, and OpenClaw. We built Kastra after one of our Cursor agents almost
Show HN
2026-07-13Source
Post excerpt:
Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool calls and evaluates them against deterministic policies before they execute. We built this product to control pre- and post-inference workloads. This is aimed at developers using coding agents like Claude Code, Codex, Cursor, and OpenClaw. Kastra pushes an allow, hold, and deny decision befo

MCP Server & Agent Ecosystem

GitHub · MCP / Skill

Traffic sources

Oct 2026

Traffic breakdown

No traffic channel or country breakdown data for this website yet.

Search

Domain authority —Domain registered Unknown

No search keyword data for this website yet.

Traffic data: Vaneform

Pricing

Pro
$19.99/mo
1 developer · 1 machine · 1M authorization decisions / month · 90-day audit retention
Team
$49.99/mo
3 seat minimum · 10M authorization decisions / month · 1-year+ audit retention
Enterprise
Contact sales
Unlimited authorization scale · Self-hosted + private cloud · Multi-region deployments

Trial: 15-day free trial, no card · 2 paid tiers ($19.99–$49.99) · Enterprise custom tier · Observed 2026-11-08 · Pricing page

Entry price $19.99/mo, Lower than 54% of peers; “Prompts, Evals & LLM Observability” median is $21.6/mo.View pricing benchmark

Pages & changes

Tracked since 2026-07-22

Key pages

Weekly snapshots
kastra.ai/ Snapshot 2026-11-09

Changes

No pricing, plan, or positioning changes detected since tracking started.

Design

First-screen visual analysis & :root CSS

Dark Developer (Dark canvas, airy density) featuring centered headline + cta layout and code block / terminal / cli visuals.

First-screen preview · click to zoom

First-screen pitch & conversion flow

“Authorization for AI systems.”

Centered Headline + CTA hero structure paired with start free / sign up CTA and no explicit trust bar.

Conversion path: Centered Headline + CTA + Code Block / Terminal / CLI → Start Free / Sign Up

Palette · click to copy

5-D design score7.9 / 10
Typography
8.0
Color & Contrast
8.0
Layout & Spacing
8.0
Craft & Polish
8.0
Distinctiveness
7.0

Structure

Fonts
Syne / Plus Jakarta Sans / IBM Plex Mono
Primary visual
Code Block / Terminal / CLI
Conversion CTA
Start Free / Sign Up
Social proof
No Explicit Trust Bar
Navigation
Full-Width Top Bar
Theme & density
Dark · Airy
Corners & depth
Medium Radius · Hairline borders
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Dark Developer (with Precision Swiss Grid)

Deep dark surfaces, monospace typography, terminal/code snippets, and high-precision borders.

## Design Tokens

```css
:root {
  --background: #050706;
  --surface: #121815;
  --foreground: #fafafa;
  --muted-foreground: #c3ccc7;
  --accent: #44dfae;
  --radius: 8px;
  --font-heading: "Syne", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}
```

Color area ratio: Background #050706 (~71%) · Surface #121815 (~17%) · Text #FAFAFA (~6%) · Muted Text #C3CCC7 (~4%) · Accent #44DFAE (~2%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Centered Headline + CTA
- Navigation: Full-Width Top Bar
- Theme & density: Dark · Airy
- Border radius & elevation: Medium Radius; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Code Block / Terminal / CLI
- Conversion CTA: Start Free / Sign Up
- Headline hook: Category Positioning Anchor
- Hero components: Code & Terminal
- Spatial layout notes: Centered Headline + CTA hero structure paired with start free / sign up CTA and no explicit trust bar.
- Visual summary: Dark Developer (Dark canvas, airy density) featuring centered headline + cta layout and code block / terminal / cli visuals.

## Avoid

- Warm pastel backgrounds
- Playful cartoon illustrations
- Oversized pill buttons everywhere

Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.

Questions & evidence

How much does Kastra cost?
Pro: $19.99/mo; Team: $49.99/mo; Enterprise: Contact sales. Observed 2026-11-08. Check the source for current billing terms, usage limits and taxes.Source
How much website traffic does Kastra get?
Vaneform estimates 10.6K website visits in 2026-10. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
What is Kastra and what platforms does it support?
Kastra is catalogued under Prompts, Evals & LLM Observability: Authorization for AI systems.. Supported platforms: MCP Server, CLI / SDK, API.

Related products in this category

AI Models & Agents / Prompts, Evals & LLM Observability

These products share a catalog category. Compare customer tasks, features and deployment requirements before treating them as alternatives.