Manage explicitly authorized mail and calendar accounts through a guarded CLI or local MCP server.
Publisher’s description
What is Corresync?
Corresync by nkiyohara is open-source Windows software in the email clients category. It is written in Go.
Installation and requirements
The publisher provides Portable installers for 64-bit and ARM64 Windows. It runs without installation (portable).
Updates and version history
The current version is 0.9.2, released on October 22, 2026. The version history goes back to August 3, 2026: 5 releases, all linked to the official files. The last update is less than a month old.
Popularity and file types
The source code on GitHub (nkiyohara/corresync) has 2 stars. Similar programs include Tuta Mail, Mailspring and Proton Mail Bridge.
Project description on GitHub: “Local-first MCP server and CLI for email and calendars across Outlook, Gmail, Microsoft 365, JMAP, IMAP/SMTP, and CalDAV. Preview-before-commit writes; no hosted relay.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Portable: runs without installation
- Updated in the last two months
In short: Corresync is an open-source email client tool for 64-bit and ARM64 PCs.
Is Corresync safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
88EB8EE0AB92BAC4FB961A4C36FA6497FE0878F2A10B3AB75C4D426CB32A1097· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 5 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.9.2Latest | October 22, 2026 | — | 64-bit ZIPARM64 ZIP |
| 0.8.8 | October 20, 2026 | — | 64-bit ZIPARM64 ZIP |
| 0.8.7 | October 16, 2026 | — | ARM64 ZIP64-bit ZIP |
| 0.8.6 | August 18, 2026 | — | ARM64 ZIP64-bit ZIP |
| 0.8.5 | August 3, 2026 | — | 64-bit ZIPARM64 ZIP |
Install from the command line
Silent install ›winget install --id nkiyohara.Corresync -eRelated guide: How to use winget: install and update apps
Information
- Publisher
- nkiyohara
- Category
- Email clients
- Licence
- Apache-2.0
- Price
- Free
- Source code
- github.com/nkiyohara/corresync
- Written in
- Go
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- Portable
- Version
- 0.9.2
- Released
- October 22, 2026
- Added to the catalogue
- August 6, 2026
- Versions listed
- 5
- GitHub stars
- 2
- GitHub forks
- 1
- Website
- github.com
- winget ID
- nkiyohara.Corresync
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Corresync free?
Yes. Corresync is open-source software under the Apache-2.0 licence.
Is Corresync safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Corresync with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Corresync run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Corresync?
The versions page lists all 5 versions with links to their official installer files, back to August 3, 2026.
Can I use Corresync without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to Corresync?
Tuta Mail, Mailspring, Proton Mail Bridge, eM Client and MFCMapi. The alternatives page compares them.
