Chapar vs Spacemail for Claude

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

Chapar compared with Spacemail for Claude
Detail	Chapar	Spacemail for Claude
What it does	A fast, private and offline API client for REST, gRPC, GraphQL and WebSocket services	Free MCP connector for Claude to access Spacemail email
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	GB
Pricing model	Open source	Open source
Pricing	Not given	Free
Key features	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	Check new mail across all mailboxes with message previews Search emails by sender, subject, words or date Read full email messages with attachment names Draft threaded replies and new emails saved to Drafts Mark messages as read or unread and flag important ones Archive, move or delete messages to Trash Works with Claude Desktop, Claude Code, Cursor and Windsurf Support for up to three mailboxes Drafts saved for manual review before sending Data stays on your computer, not collected by Norwich Website Design
What makes it different	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 and open-source under MIT licence Email content marked as untrusted to prevent phishing attacks Deleted messages go to Trash, not permanently deleted Independent project not affiliated with Spaceship or Spacemail
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	6 no change since last check	44 −1 (down) since last check
Trust Flow (Majestic)	5	0
Citation Flow (Majestic)	26	4
Referring domains (Majestic)	31	3

4 details filled in for both companies.

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