Manage an authorized Outlook Web mail and calendar session through a guarded CLI or local MCP server without a Microsoft Graph application.
Publisher’s description
What is owa-bridge?
owa-bridge 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).
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
In short: owa-bridge is an open-source email client tool for 64-bit and ARM64 PCs.
Is owa-bridge 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:
1A0A2A7F0FE17D61B38746195D7B7F1AE2CBA97A0275EF47B6995FFAD71C2626· 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 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.6.1Latest | July 25, 2026 | — | ARM64 ZIP64-bit ZIP |
Install from the command line
Silent install ›winget install --id nkiyohara.OWABridge -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
- 0.6.1
- Released
- July 25, 2026
- Added to the catalogue
- August 4, 2026
- Versions listed
- 1
- GitHub stars
- 2
- GitHub forks
- 1
- Website
- github.com
- winget ID
- nkiyohara.OWABridge
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to owa-bridge
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Frequently asked questions
Is owa-bridge free?
Yes. owa-bridge is open-source software under the Apache-2.0 licence.
Is owa-bridge 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 owa-bridge 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 owa-bridge run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Can I use owa-bridge without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to owa-bridge?
Tuta Mail, Mailspring, Proton Mail Bridge, eM Client and MFCMapi. The alternatives page compares them.
