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Reference edition 2026.46

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Helicon vs Chapar

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

Helicon compared with Chapar
DetailHelicon logo HeliconChapar logo Chapar
What it doesFree, open-source desktop and web app for Meta's Muse Code CLI A fast, private and offline API client for REST, gRPC, GraphQL and WebSocket services
StageNot given Not given
FoundedNot given Not given
Based inIN Not given
Pricing modelOpen source Open source
PricingFree, MIT licensed, no paid tier, no trial, no seats, no account. Runs on your existing Muse Code subscription. Not given
Key features
  • Projects and sessions grouped by working directory and git worktrees
  • Resume sessions including those started in the terminal TUI
  • Inline diffs in the thread at the turn that produced them
  • Every agent approval surfaced and never bypassed
  • Cost tracking at published API rates per thread
  • Full keyboard navigation with command palette
  • File viewer with source, Markdown, image, video and PDF preview
  • Remote daemon support for running the agent on another machine
  • VS Code extension available
  • Native Windows support with PowerShell
  • REST and HTTP with every method, query and path params, JSON, XML, text, form-data, URL-encoded and binary bodies
  • gRPC with server reflection or proto files, unary and server-streaming calls, metadata and trailers, TLS and mutual TLS
  • GraphQL queries and variables with data and errors split out
  • WebSocket text, JSON and binary messages with live message log
  • Traffic proxy to capture HTTP(S) traffic of apps and phones
  • Python scripting for pre and post-request scripts with tests
  • Test cases and CI integration with chapar-cli
  • Environments with variables and secret values encrypted with OS keychain
  • Import Postman collections, OpenAPI specs and proto files
  • Code generation for cURL, Python, Go, JavaScript, Java, Ruby and .NET
What makes it different
  • No additional cost or billing on top of existing Muse Code subscription
  • Credentials stay with the muse CLI, never stored by Helicon
  • Native Windows support without requiring WSL
  • MIT licensed open-source with no company behind it
  • Sessions and approvals never bypassed or batched
  • Local-only data with no cloud sync or telemetry
  • GPU-rendered native UI that starts quickly and runs on macOS, Linux and Windows without a browser engine
  • Collections stored as YAML files in git for version control
  • Built-in traffic proxy for inspecting and importing HTTP(S) traffic from other apps
  • Free and open source under BSD 3-Clause license
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)11 −1 (down) since last check6 no change since last check
Trust Flow (Majestic)145
Citation Flow (Majestic)2726
Referring domains (Majestic)3431

4 details filled in for both companies.

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