Best Slack Alternatives in 2026

Video calls made by Google

Google Meet is the video conferencing tool built into Google Workspace — if your company pays for Gmail, Docs, and Drive, Meet is already included at no extra charge. The integration is seamless: schedule in Google Calendar, join from the Calendar invite, share Google Docs mid-call. Video quality is solid and the noise cancellation handles office environments reasonably well. Meet works entirely in-browser with no client install required, which eliminates the friction of sending Zoom links to people without accounts. For internal calls and quick client meetings, it covers most use cases. The free tier allows 60-minute group calls. Paid access comes with Google Workspace plans starting at $6/user/month (Business Starter). Limitations are real: breakout rooms and webinar features lag behind Zoom, the recording quality is lower, and Meet does not have a standalone app ecosystem for add-ons. Reddit feedback from Google Workspace shops is consistently positive — nobody misses switching to Zoom for internal meetings. Non-Google shops find the browser-first approach convenient but miss Zoom's deeper feature set for large events.

Your place to talk and hang out

Discord is a real-time chat platform originally built for gaming, now widely used by developer communities, open-source projects, and startup teams. The free tier is genuinely comprehensive: unlimited message history, voice channels, video calls, and screen sharing at no cost. Nitro costs $9.99/mo for boosted file uploads (500MB) and higher quality video. Server Boost ($7.99/mo) unlocks perks for community servers. The permission system is granular and handles large communities well. Bots (Carl-bot, MEE6, custom scripts) automate moderation and commands. Main limitations for business use: Forum channels exist but threading is less intuitive than Slack threads, there is no native task management, and search is basic. Reddit engineering communities use Discord for async help and open-source project coordination rather than replacing Slack for structured work. The API is excellent — building bots and integrations is straightforward with discord.py or discord.js. For developer communities, open-source projects, and informal startup teams that want free unlimited messaging with voice and video included, Discord is the obvious choice. For structured business communication with compliance requirements, Slack or Teams fits better.

One platform to connect

Zoom is the video conferencing tool that became the default during the pandemic and has stayed dominant by expanding aggressively beyond video calls. The base conferencing quality is reliable — low latency, good echo cancellation, and stable connections across bandwidth conditions that would break competing tools. Zoom Phone replaces your desk phone system. Zoom Rooms turns conference rooms into smart video setups. Zoom Webinars and Events handle large-scale virtual events up to 50,000 attendees. The AI Companion handles transcription, meeting summaries, and action item extraction — included in paid plans. Pricing starts at a free tier (40-minute limit on group calls), then $15.99/user/month (Pro) and $19.99/user/month (Business) with annual billing. Enterprise pricing requires a sales call. The main complaints have shifted since the pandemic: Zoom fatigue is real, the security issues of 2020 are largely patched, and the main frustrations now are the aggressive upsell toward the full Zoom platform and competition from Microsoft Teams (free with Microsoft 365) and Google Meet (free with Google Workspace). For companies not locked into Microsoft or Google ecosystems, Zoom remains the most reliable standalone video conferencing option.

Free team messaging and communication

Pumble is a Slack alternative built by the same company that makes Time Doctor and Clockify — it positions itself as team messaging with a permanently free tier that does not limit message history. The core feature set mirrors Slack: channels, threads, DMs, file sharing, and voice and video calls. The free plan retains unlimited message history, which is Pumble's main differentiator — Slack's free tier deletes messages after 90 days, which is a real operational problem for small teams. Paid plans start at $2.49/user/month (Pro) and $4.99/user/month (Business), substantially cheaper than Slack's $7.25/user/month Starter. The integration ecosystem is much smaller than Slack — native integrations exist for Zapier, Google Drive, Trello, GitHub, and a few others, but you will not find the Salesforce, Jira, or PagerDuty depth that Slack offers. Reddit feedback is positive for small teams wanting free persistent messaging, with complaints focused on the limited integrations and occasional reliability issues. If your team's main Slack frustration is the message history paywall and you don't depend on deep app integrations, Pumble is a legitimate upgrade from the Slack free tier.

Team collaboration made simple

Chanty is a team messaging and project management hybrid — it combines Slack-style channels and DMs with a built-in task management system called the Teambook. You can turn any message into a task, assign it, set a due date, and track it in a Kanban view without leaving the app. This message-to-task conversion is genuinely useful for small teams that want to reduce the gap between discussion and action without managing two separate tools. Voice and video calls are included. The free plan supports up to 5 users with unlimited message history — above 5 users requires the Business plan at $3/user/month. The Business plan unlocks guest access, unlimited integrations, and audio and video conferencing. Integrations cover Google Drive, Dropbox, GitHub, Trello, Asana, and Zapier. Reddit feedback praises the simplicity and the message-to-task workflow, but notes that the task management is too basic for teams running real project management — you will not replace Jira or Asana with Chanty's Kanban. The UI is clean and modern, which puts it ahead of Pumble aesthetically. For teams of under 20 wanting messaging plus light task tracking in one tool, Chanty is a compelling $3/user/month option.

End-to-end encrypted collaboration suite

CryptPad is a zero-knowledge, end-to-end encrypted collaboration suite built with JavaScript and Node.js. Everything is encrypted client-side before it touches the server — the server operator can't read your documents. Around 10K GitHub stars. It includes rich text docs, spreadsheets, kanban boards, whiteboards, forms, and markdown pads. The encryption is real and has been independently audited, which puts it in a different category from tools that only encrypt data at rest. Storage is quota-based with a Teams feature for shared workspaces. The tradeoff is performance: client-side crypto means slower load times, especially on older hardware. Mobile experience is genuinely rough — the UI wasn't designed for touch and complex documents lag on phones. Subscribers fund the project; the free tier limits you to 1GB storage. It's one of the few genuinely private collaboration tools you can self-host, which is why journalists and researchers actually use it rather than just recommend it in theory.

Open source Slack alternative

Mattermost is an open-source, self-hostable Slack alternative written in Go and React. The Community edition is MIT licensed; Cloud starts at $10/user/mo; Enterprise licensing adds compliance and SSO. Around 30K GitHub stars. Self-hosting on Linux with Docker is well-documented — Postgres backend, straightforward setup, active update cadence. The messaging model mirrors Slack: channels, DMs, threads, slash commands, and integrations via webhooks and a plugin marketplace. The main advantage over Slack is data sovereignty: messages stay on your servers, which matters for regulated industries (healthcare, finance, government). Compared to self-hosted Rocket.Chat, Mattermost is faster and more reliable. Compared to Zulip, it has better mobile apps but Zulip has a superior threading model for async teams. The Enterprise plan adds SAML SSO, compliance exports, and custom retention policies. Reddit DevOps communities recommend Mattermost for teams with GDPR constraints or air-gapped network deployments where messages cannot leave the organization infrastructure. For public communities, Discord free tier makes more sense. Mattermost is the right call for engineering teams where data residency is a hard compliance requirement.

Chat, meet, call, and collaborate

Microsoft Teams offers deep integration with Microsoft 365, excellent enterprise security, and strong video conferencing.

Open-source video conferencing — free, secure, self-hosted Zoom alternative

Jitsi Meet is a browser-based video conferencing tool — no app download required, no account needed to join a call. Open source under Apache 2.0, with a public instance at meet.jit.si that anyone can use free, or a self-hosted version you run on your own server. Built on WebRTC and Jitsi Videobridge, which routes video through a server rather than a full peer-to-peer mesh, reducing bandwidth requirements for participants. Around 22,000 GitHub stars. Self-hosting works well for small to medium meetings under 15 participants on modest hardware. Past 15-20 participants on a single self-hosted instance, video quality degrades unless you scale Jitsi Videobridge horizontally across multiple servers, which requires real infrastructure expertise. The public meet.jit.si instance handles larger groups but carries no privacy guarantees. End-to-end encryption works in one-on-one calls but not in multi-party calls as of 2026. Recording requires Jibri, a separate component that runs a headless Chrome browser to capture sessions. Setup takes several hours and requires ongoing maintenance. The 8x8 Video Platform is the commercial SaaS version built on Jitsi infrastructure, offering managed hosting without self-hosting overhead. Who should not use Jitsi: teams needing HIPAA or FedRAMP compliance (use Zoom or Webex), organizations expecting polished features like AI summaries, breakout room timers, or native recording dashboards, and teams with no one capable of managing a Linux server. The operational overhead of self-hosted Jitsi is real — if you need a no-maintenance video tool, the public meet.jit.si or a commercial alternative is the better path.

Open-source collaborative markdown editor

HedgeDoc is an open-source collaborative markdown editor forked from HackMD in 2020 when the HackMD team went commercial. Built on Node.js with PostgreSQL, MySQL, and SQLite support, it lets teams write and edit markdown simultaneously with real-time sync. Each document is an isolated pad with a shareable URL — think Google Docs for markdown. Around 10K GitHub stars. You get syntax highlighting, math rendering via MathJax, diagram support with Mermaid, and presentation mode. The permission system is granular: freely writable, owner-only, or signed-in users only. Authentication covers LDAP, GitHub, GitLab, SAML, and local accounts, but OAuth config takes trial and error to get right. Reddit users frequently note it's great for meeting notes and technical drafts but the lack of structured navigation means you end up with orphaned pads and no way to find them later. There's no full-text search across all documents. It's not a wiki — it's a shared scratchpad, and that distinction matters when evaluating it.

Enterprise video conferencing by Cisco

Webex is Cisco's enterprise video conferencing and collaboration platform, with roots going back to 1995 and deep entrenchment in large enterprise and government accounts. The security and compliance story is the main differentiator: end-to-end encryption, FedRAMP authorization, HIPAA compliance, and data residency controls that Zoom and Teams cannot match in some regulated industries. Defense, finance, healthcare, and government sectors treat Webex as a default because those certifications are non-negotiable. The free tier supports 100 participants with a 40-minute limit on group calls. Webex Meet runs around $15/user/month for unlimited meetings, cloud recording, and 200 participants. Webex Suite at approximately $25/user/month adds persistent messaging, calling, and full collaboration platform features. Enterprise pricing is negotiated directly with Cisco. AI features as of 2025-2026 include the Webex AI Assistant for meeting summaries, real-time translation in 100+ languages, and noise suppression. These are competitive with Zoom's AI Companion but require higher plan tiers. The honest criticisms: Webex's UI is dated compared to Zoom and Teams, and user experience consistently scores lower in enterprise collaboration surveys. The desktop client is heavier than it should be. Onboarding unfamiliar participants to a Webex call adds friction that Google Meet or Zoom avoids. IT departments tolerate these frustrations specifically for the compliance certifications. Who should not use Webex: any company that does not require FedRAMP, HIPAA, or defense-grade certifications. For those organizations, Zoom, Google Meet, or Microsoft Teams delivers a better daily experience at comparable or lower cost per seat.

Open-source team communication platform — self-hosted Slack alternative

Rocket.Chat is a self-hosted team messaging platform that goes further than Slack alternatives by adding omnichannel support — live chat, email, WhatsApp, and social media inboxes all routing into the same agent queue alongside internal channels. Around 40,000 GitHub stars. Self-hosting requires real resources: the recommended production setup is 4 CPU cores and 8GB RAM for a mid-size team, using MongoDB as the database, which makes it heavier to run than Mattermost or Zulip. Where Rocket.Chat earns its place is customer-facing use cases: companies route incoming WhatsApp messages, email tickets, and website live chat into one workspace. The UI is cluttered compared to Slack — there is simply more surface area, and newer users get confused. SOC 2 Type II certification and regular security audit releases make it popular in regulated industries including healthcare and government. For pure internal messaging, lighter alternatives are a better fit. Federation protocol allows connecting separate Rocket.Chat instances.

Secure messenger and collaboration app built on the Matrix protocol

Element is the most popular Matrix protocol client — open source, federated messaging where your messages live on a homeserver you control. The Matrix protocol handles decentralization, so an Element user on your company's Synapse instance can chat with anyone on matrix.org or any federated server. Available as a web app, Electron desktop app, and native iOS and Android clients. Around 11,000 GitHub stars for element-web. The bridge ecosystem is where it earns its place in corporate environments: bots bridge Slack, Discord, Microsoft Teams, and IRC conversations into Matrix rooms, making incremental migration off proprietary platforms possible. Synapse (Python) is the battle-tested homeserver; Dendrite (Go) is lighter but less production-tested. Main Reddit complaints: E2E encryption key verification confuses non-technical users and breaks sessions when they get it wrong, the mobile apps feel behind Signal in polish, and large rooms in federated servers can lag noticeably. Cross-signing between devices improved in recent versions but still trips people up when a device is lost.