The best Instant Messenger alternative to Spacebar is Discord, which is free. If that doesn't suit you, our users have ranked more than 25 alternatives to Spacebar and nine of them are Instant Messengers so hopefully you can find a suitable replacement. Other interesting Instant Messenger alternatives to Spacebar are Stoat Chat, Element X, Echoed and Ripcord.
An integrated platform for text and voice communications. Offers tailored channels for different topics, customizable moderation tools, low latency for fluency, and managed user roles for optimal community facilitation.
Instant messaging platform supporting text and voice channels, live video calls, secure screen sharing, private group chats, customizable permissions, moderation tools, bot integration, privacy-focused design, open-source development, and cross-platform use.
It is the brand new, and fastest ever, Matrix client. It is for personal and community use, and will support enterprise functionality later this year.
Lightweight communication platform with unlimited channels, seamless voice and video, screen sharing, private file sharing, advanced task and calendar tools, robust privacy features, emoji and thread support, and multi-platform efficiency for gaming or team communities.
Ripcord is a desktop chat client for group-centric services like Slack and Discord. It provides a traditional compact desktop interface designed for power users. It's not built on top of web browser technology: it responds quickly to input, sips gently from computer...
Facilitates community collaboration through voice, video, and text chat, integrated docs and tasks, configurable channels, roles, and permissions, seamless mobile and desktop access, rapid message reactions, file sharing, and notification controls for groups.
Common Ground is a browser-based, open-source social platform for communities, built as a robust alternative to Discord.
Mycelium (formerly Disclone) is a feature-rich, open source communication app and personal-collaborative hub (drive/notes...).
SadnessChat SadnessChat is a free, real-time chat platform built for real conversations. Whether you're hanging out with friends or building a community, SadLounge has everything you need.
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Fosscord copies Discord's features to make them FOSS, so yeah: Discord is pretty similar.