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HyperFrontend vs Castov

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

HyperFrontend compared with Castov
DetailHyperFrontend logo HyperFrontendCastov logo Castov
What it doesMicro-frontend architecture framework for composing web applications Fast, 100% client-side developer platform with zero-data logging
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Free
PricingNot given All tools are free with no usage limits. The site may show ads in the future to cover running costs.
Key features
  • Typed host and hostee SDKs for building and embedding features
  • CLI for initialization, building, and development with feature.config.*
  • Dev server with debug UI for inspecting host/hostee message traffic
  • Multiple display modes: embedded, dialog, popup, standalone
  • Contract declaration with message validation and schema enforcement
  • Optional encryption with v3 and v4 protocols
  • Framework-agnostic with support for React, Vue, Angular, vanilla JS
  • Lifecycle management with open/close and ready state handling
  • Message broker with typed routing and validation
  • Multi-timezone support with IANA database and daylight saving time
  • JSON to TypeScript conversion
  • JWT decoder and inspection
  • Cron expression parser and generator
  • End-to-end encrypted environment variable vaults
  • P2P multiplayer canvas with WebRTC and CRDT
  • Steganography for hiding encrypted secrets in images
  • Service Worker API mocker for frontend testing
  • Encrypted URL shares with hash fragment storage
What makes it different
  • Zero runtime dependencies and self-contained feature packages require no transitive install burden
  • Modernize without a rewrite by composing existing applications of any age
  • Contract-based type safety with handshake validation and fail-closed security
  • Production-ready static file server with optional encryption and message inspection
  • Zero-data logging: no keystroke sent to external servers, all processing in browser memory
  • 100% client-side operation works entirely offline
  • Unified ecosystem across web, CLI, and AI agents via MCP Server
  • Sub-millisecond performance with local execution
  • Tool chaining and piping for seamless multi-stage workflows
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check1 +1 (up) since last check
Trust Flow (Majestic)51
Citation Flow (Majestic)2119
Referring domains (Majestic)97

4 details filled in for both companies.

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