Alternatives to Spark Mail

Other reviewed communication tools. Each one links to its full review, with what it is good for and what to watch out for.

MattermostFreemiumSelf-hostable team messaging and workflow platform aimed at security-sensitive, regulated and air-gapped environments.CommunicationZoomFreemiumVideo meetings platform (Zoom Workplace) with chat, phone, webinars, docs and an AI meeting assistant.CommunicationElementOpen sourceEnd-to-end encrypted messaging and calling app built on the open Matrix standard, with self-hosted server options.CommunicationJitsi MeetOpen sourceOpen-source, encrypted video conferencing you can use free on meet.jit.si or self-host, no account required.CommunicationThunderbirdOpen sourceFree, open-source email, calendar and contacts app for Windows, macOS and Linux, with an Android app.CommunicationMMicrosoft TeamsFreemiumMicrosoft 365 hub for chat, meetings and file collaboration, built on Microsoft 365 groups and SharePoint.CommunicationSSlackFreemiumChannel-based team messaging with huddles, docs, lists, workflows and built-in AI, made by Salesforce.CommunicationDDiscordFreemiumVoice, video and text chat app for friends, gaming groups and online communities, organised into servers.CommunicationGGoogle MeetFreemiumGoogle's browser-based video meetings, free with a Google Account and expanded in Workspace and Google One plans.CommunicationRRocket.ChatFreemiumSelf-hostable secure messaging, voice and video platform with native Matrix and XMPP federation.CommunicationGGmailFreemiumGoogle's email service with spam filtering, Gemini writing help and custom-domain business email via Workspace.Communication