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Sickle vs Nysa

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

Sickle compared with Nysa
DetailSickle logo SickleNysa logo Nysa
What it doesEmail MCP server for Claude, Cursor and other AI agents to access every mailbox you own Shared memory for regulated companies and their AI agents
StageNot given Not given
FoundedNot given Not given
Based inGB US
Pricing modelFree trial Freemium
PricingMonthly: €8.99/month after 7-day free trial. Yearly: €30/year (€2.50/month equivalent, 72% savings). Includes both the Mac app and the MCP connector. Team plan: $10/person/month with 14-day free trial, includes meeting recording, email and calendar enrichment, knowledge organized by topic, private scopes and projects, agent keys with custom permissions, import existing brain, and MCP for all agents. Enterprise plan: custom pricing for regulated a
Key features
  • Search across multiple mailboxes simultaneously
  • Read full email threads with conversation history
  • Move, archive and mark emails as read
  • Scoped permissions: read, change, and send separately
  • Attach files up to 18 MB to drafts and emails
  • Download and open email attachments
  • Native macOS mail client included
  • Support for multiple email providers
  • Encrypted file handling during transfer
  • Revoke access anytime within the hour
  • Records and transcribes meetings with visible participant
  • Automatically extracts facts from email and calendar
  • Scoped access control with automatic sorting
  • Private projects limited to members
  • Agent API keys with read-only or read-write permissions
  • Works with Claude, ChatGPT, Cursor, Codex over MCP
  • Import existing brain from markdown, Obsidian, or GBrain
  • Facts organized by topic with full history
  • Raw email stays private to owner, team sees extracted facts only
  • 180 days of email history imported on day one
What makes it different
  • Works with any MCP client, not locked to one AI platform
  • No installation required; works on macOS, Windows and Linux
  • Access unlimited email accounts simultaneously in one connection
  • Send emails with opt-in permission and approval workflow
  • Every fact is scoped automatically by sensitivity level and agents see only what their teammate can access
  • Agents can write back to the same brain over MCP, updating shared knowledge in real time
  • CASA Tier 2 security assessed and verified by Google for Gmail and Calendar access
  • Onboard entire team in under 5 minutes with one-click Google sign-in
  • Data never used to train AI models, privacy verified in policy
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)13 +1 (up) since last check2 −1 (down) since last check
Trust Flow (Majestic)89
Citation Flow (Majestic)2226
Referring domains (Majestic)1732

6 details filled in for both companies.

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