Grayjay vs Mattermost
A side-by-side look at Grayjay and Mattermost. For an in-depth review of either product, follow the links below.
Grayjay
Office & Productivity
Grayjay is an open-source alternative to Microsoft Outlook for email, contacts, and calendar management. It has a clean, customizable interface and supports IMAP/SMTP and Google, Exchange, and other popular email providers out of the box.
emailcalendarcontactsopen-sourceoutlook-alternative
Mattermost
Social & Communications
Mattermost is an open-source, self-hosted online chat service with file sharing, search and integration capabilities. It supports text, images, videos and custom emojis across PCs and phones with instant notifications.
chatmessagingteam-collaborationopen-source
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