Slackbot’s new Salesforce record previews, embedded Tableau charts, and DocuSign envelope actions are locked to Business Plus and Enterprise Grid. The desktop Slack client is where teams feel the price of that gating first: heavier RAM use, more integrations to keep signed in, more tabs in the same Electron shell. The Slack alternatives for desktop in 2026 include a genuinely fast Electron replacement, two self-hosted platforms that match the feature list, and one federated option where the server does not have to be someone else’s.
Why teams leave Slack on desktop
- Slack’s Electron app comfortably parks at 1.5 to 2 GB of RAM once a few workspaces and huddles are open. On laptops with 16 GB this becomes visible fast.
- Message history above 90 days lives behind the paid tier on the free plan, and enterprise features like DLP, compliance export, and SSO push teams onto Business Plus.
- Every headline integration lands on the paid tiers first, so smaller teams pay for a marketing story they never activate.
- Self-hosting is not on the menu, so teams with data-residency or air-gap requirements are out.
- The keyboard-shortcut surface has grown to the point that experienced users need a cheat sheet to remember them all.
Quick comparison
| App | Best for | Free plan | Starting price/user/mo | Standout feature |
|---|---|---|---|---|
| Microsoft Teams | Microsoft 365 workplaces | Yes | $4.00 | Meetings + chat + Copilot |
| Discord | Small teams, voice-first | Yes | $0 | Persistent voice rooms |
| Element | Encrypted federated chat | Yes | $5.00 | Matrix federation |
| Rocket.Chat | Self-hosted collaboration | Yes (self-host) | $4.00 (cloud) | Full self-hosting |
| Mattermost | DevOps + regulated teams | Yes (self-host) | $10.00 (cloud) | Playbooks, incident channels |
| Zulip | Thread-heavy async teams | Yes | $6.67 | Topic-per-thread model |
| Zoom Team Chat | Zoom-first meeting workflows | Yes (with Zoom Pro) | $13.32 (Zoom Pro) | Chat inside the meeting app |
The 7 best Slack alternatives on desktop
Microsoft Teams, best for Microsoft 365 workplaces
Microsoft Teams is the default landing spot for organizations already paying for Microsoft 365. The 2025 desktop client rebuild (WebView2 rather than Electron) roughly halved memory use and made cold-start feel comparable to Slack for the first time. Copilot inside a channel summarizes long threads, drafts replies, and pulls context from files stored in SharePoint or OneDrive.
Where it falls short: The Linux desktop client is still web-only, which puts Linux-heavy shops behind. Notification handling for multi-tenant users takes patience to set up. Third-party app depth still trails Slack’s App Directory.
Pricing:
- Free: 60-minute group meetings, 5 GB storage, unlimited chat.
- Teams Essentials: $4.00/user/month standalone.
- Business Basic: $6.00/user/month bundles Teams with Word, Excel, Exchange.
- vs Slack: Cheaper per seat once meetings are factored in.
Migrating from Slack: Microsoft Migration Manager pulls Slack channels, DMs, files, and threads via Slack’s workspace export.
Download: Teams for Windows | Teams for macOS | Teams for Linux (web)
Bottom line: The right default for anyone already on Microsoft 365.
Discord, best for small teams and voice-first work
Discord grew from gaming chat into a serious workplace tool for small studios and open-source projects. Persistent voice channels change how teams work, one click into a room instead of scheduling a call. The desktop client is fast on all three platforms and threads work well for async.
Where it falls short: No SCIM for large-scale onboarding, no legal-hold controls, and admin surfaces are consumer-shaped. That rules Discord out of most regulated industries.
Pricing:
- Free: Unlimited chat, unlimited channels, 25 MB uploads.
- Nitro: $9.99/month for higher-quality streams, 500 MB uploads.
Migrating from Slack: No official importer. Small teams typically rebuild channel structure by hand.
Download: Discord for Windows | Discord for macOS | Discord for Linux
Bottom line: Pick Discord when your team is under 50 people and voice-first would help more than another chat app.
Element, best for encrypted federated chat
Element runs on the Matrix protocol: end-to-end encrypted DMs and channels, cross-server federation, and no single company sitting between you and your data. The desktop client works across Element’s hosted service or your own Matrix homeserver, with encrypted voice and video calls built in.
Where it falls short: Federation adds moving parts. Key backup and cross-signing still trip first-time users. The UI improved a lot in 2025 but polish still lags Slack, especially long threads.
Pricing:
- Free: Element Home for personal use, self-hosted Matrix for any team willing to run it.
- Element Business: $5.00/user/month hosted encrypted workspace.
Migrating from Slack: Matrix ships a Slack bridge that mirrors channels and DMs one-way into Element. Full migration is a rebuild.
Download: Element for Windows | Element for macOS | Element for Linux
Bottom line: The right pick when the chat provider must not be able to read your messages.
Rocket.Chat, best for self-hosted collaboration
Rocket.Chat is the mature open-source Slack clone many enterprises quietly run inside their own perimeter. Channels, DMs, threads, huddles, and voice all work the way Slack users expect, and the desktop client supports Windows, macOS, and Linux natively.
Where it falls short: Self-hosting means someone runs the server and applies updates. Cloud plans compete on features but drop the biggest reason to pick Rocket.Chat. Search on very large deployments needs tuning.
Pricing:
- Free: Community Edition self-hosted, unlimited users.
- Starter cloud: $4.00/user/month.
- Enterprise: custom pricing with SSO, compliance, dedicated support.
Migrating from Slack: Native Slack importer parses the export ZIP and rebuilds channels, users, and messages.
Download: Rocket.Chat for Windows | Rocket.Chat for macOS | Rocket.Chat for Linux
Bottom line: The default choice when the team has to own the chat server.
Mattermost, best for DevOps and regulated teams
Mattermost is the chat platform DevOps and government teams pick when Slack is off the table. Playbooks turn recurring incidents into checklists that run inside a channel, and the desktop client supports multi-server accounts, which is useful for consultants working across regulated clients.
Where it falls short: UI is more utilitarian than Slack. Casual users describe it as “Slack from three years ago”, which is a fair read. Cloud tier is priced higher than most alternatives here.
Pricing:
- Free: Team Edition self-hosted, unlimited users.
- Professional cloud: $10.00/user/month.
- Enterprise: custom pricing with FedRAMP and IL5 certifications.
Migrating from Slack: Mattermost’s Slack import tool reads the Slack export ZIP and preserves threads, users, and channels.
Download: Mattermost for Windows | Mattermost for macOS | Mattermost for Linux
Bottom line: Pick Mattermost when incident response and audit matter more than polish.
Zulip, best for thread-heavy async teams
Zulip organizes every conversation by topic inside a stream, so a channel with hundreds of threads stays scannable rather than collapsing into a wall of interleaved messages. Distributed and async teams tend to convert after a week because the “which thread am I in” cognitive load drops.
Where it falls short: The topic model has a learning curve that not every team gets over. Voice and video are basic and rely on integrations. UI is dense.
Pricing:
- Free: Zulip Cloud Free, community-focused.
- Standard: $6.67/user/month with SSO, unlimited history, integrations.
- Self-hosted: Free forever, unlimited features.
Migrating from Slack: Zulip’s Slack importer moves users, channels, messages, files, and custom emoji.
Download: Zulip for Windows | Zulip for macOS | Zulip for Linux
Bottom line: The right pick if your team lives in threads and hates losing them.
Zoom Team Chat, best for Zoom-first meeting workflows
Zoom Team Chat rides inside the Zoom desktop app and gives teams that already run meetings on Zoom a persistent chat surface without a second vendor. Threading, channels, and file share are competent, and message history is not gated the way Slack’s free tier is.
Where it falls short: Team Chat requires a Zoom paid seat. Third-party integrations are limited to Zoom’s Marketplace. The chat sits inside the meetings client, which is not everyone’s ideal workspace.
Pricing:
- Free: Zoom Basic with 40-minute group meetings and Team Chat.
- Zoom Pro: $13.32/user/month unlocks longer meetings, cloud recording, and enhanced Team Chat.
Migrating from Slack: No native importer. Teams typically run both apps for a few weeks and let history decay.
Download: Zoom for Windows | Zoom for macOS | Zoom for Linux
Bottom line: The right pick when your meetings already run on Zoom and adding a separate chat vendor makes no sense.
How to choose
- Pick Microsoft Teams if you already pay for Microsoft 365.
- Pick Discord if you are a small team that would rather talk than type.
- Pick Element if the provider must not be able to read your messages.
- Pick Rocket.Chat if the team has to run the server itself.
- Pick Mattermost if incident response and audit are core workflows.
- Pick Zulip if async threads must stay readable at scale.
- Pick Zoom Team Chat if you already live inside Zoom for meetings.
- Stay on Slack if the App Directory integrations are load-bearing for how your team ships.
FAQ
What is the best free Slack alternative on desktop?
Discord is free for small teams. Element Home is free for personal use. Rocket.Chat Community Edition and Mattermost Team Edition are both free forever when self-hosted.
Is Microsoft Teams cheaper than Slack?
Teams Essentials at $4.00/user/month undercuts Slack Pro at $8.75/user/month, and Microsoft 365 Business Basic at $6.00/user/month bundles Office and Exchange on top.
Can I self-host Slack?
No. Slack has no self-hosted option. Rocket.Chat and Mattermost are the two mature self-hosted paths, and Element (Matrix) is the federated one.
Is Element really end-to-end encrypted?
Yes. Element’s encryption uses the Olm and Megolm libraries, and the server stores ciphertext only.
What runs the least RAM on a laptop?
Discord, Element, and the rebuilt Teams client are lighter than Slack in most side-by-side tests. Rocket.Chat and Mattermost desktop clients are comparable to Slack.
