When Slack's free plan hides your message history after 90 days and the Pro tier runs about $8.75 per user per month, the best Slack alternatives in 2026 fall into two camps: free hosted apps like Discord, and open-source team chat you self-host for the price of a small VPS. The short answer: pick Mattermost if you want the closest self-hosted Slack replacement, Rocket.Chat for an all-in-one with built-in voice and video, Zulip if threaded conversations matter, Element (Matrix) for end-to-end encrypted and federated chat, and Discord if you just want a free hosted option and don't need business features. Below, each is ranked by what it does well and what it actually costs to run.
Most "Slack alternatives" lists mix free apps with $7-per-seat tools without saying which you can host yourself. For a team watching costs, that's the whole decision, so every self-hostable pick here is mapped to a real monthly price.
Disclosure: WaseerHost is our own hosting service, and some outbound links may be affiliate or partner links. It doesn't change which tools made this list or how they're ranked.
Why look for a Slack alternative in 2026?
Slack is still the default for team chat, and its integrations are unmatched. Teams leave for three reasons. First, price: the free plan now hides messages older than 90 days, and Pro at roughly $8.75 per user per month adds up fast for a growing team. Second, data ownership: your conversations live on Salesforce's servers, and teams handling client or regulated work increasingly want chat on infrastructure they control. Third, lock-in: exporting history and migrating is deliberately awkward. The 2026 alternatives split cleanly — free hosted apps that trade per-seat fees for someone else holding your data, and open-source tools you run yourself for a flat server cost. The right pick depends on whether you care most about cost, control, or features.
The best Slack alternatives, compared
| Tool | Type | Self-host? | Cost (self-host or plan) | Open source | Best for |
|---|---|---|---|---|---|
| Mattermost | Team chat (Slack-like) | Yes | ~€6.80/mo VPS | Yes | The closest self-hosted Slack |
| Rocket.Chat | Chat + voice/video | Yes | ~€6.80/mo VPS | Yes | All-in-one communications |
| Zulip | Threaded team chat | Yes | ~€4.49/mo VPS | Yes | Teams that live in threads |
| Element (Matrix) | Encrypted, federated chat | Yes | ~€4.49/mo VPS | Yes | Privacy and E2E encryption |
| Discord | Community chat (hosted) | No | Free / Nitro optional | No | Free hosted, communities |
| Google Chat | Team chat (hosted) | No | Part of Workspace (~$7+/user) | No | Google Workspace users |
| Microsoft Teams | Team chat + meetings (hosted) | No | Part of Microsoft 365 | No | Microsoft 365 shops |
Self-host cost is the Linux VPS the software runs on, not the software (which is free). VPS figures use Hetzner Cloud's pricing — a CX22 (2 vCPU/4 GB) is ~€4.49/mo and a CX32 (4 vCPU/8 GB) ~€6.80/mo as of June 2026. Hosted-plan prices are from each vendor's pricing page; verify before buying.
What is the best self-hosted Slack alternative?
For a near-drop-in Slack replacement you own, Mattermost is the standard answer. Channels, threads, direct messages, slash commands, and a large integration library all map closely to Slack, and the self-hosted edition is free and open-source. It's the tool teams reach for when they want Slack's workflow without the per-seat bill or handing chat history to a third party. Plan on a CX32-class VPS (4 vCPU/8 GB) at roughly €6.80/month for a real team, ideally on NVMe storage, since Mattermost runs on a database and benefits from headroom. The trade-off versus Slack is a smaller third-party app marketplace, so check your must-have integrations exist first. For most teams that want Slack's core experience under their own control, Mattermost covers it.
Rocket.Chat, Zulip, and Element: pick by what you value
These three cover the edges Slack and Mattermost leave open. Rocket.Chat is the all-in-one: team chat plus built-in voice and video and even customer-facing livechat, open-source and self-hostable on a ~€6.80/month VPS, ideal when you want one tool for internal and external communication. Zulip takes a different shape — its topic-based threading keeps busy channels readable, so async and remote-heavy teams that drown in Slack's flat channels often prefer it; it's lighter and runs comfortably around €4.49/month. Element, built on the open Matrix protocol, is the privacy pick: end-to-end encryption by default and federation, so different organisations can run their own servers and still talk — the closest thing to email's openness for chat. Choose Rocket.Chat for breadth, Zulip for threaded clarity, Element for encryption and federation.
The hosted options: Discord, Google Chat, and Teams
Not every team wants to run a server. Discord is free, instant, and excellent for communities and informal teams, though it lacks the admin controls, compliance, and threading that businesses expect — great for a startup's community, weaker as a company's system of record. Google Chat comes bundled with Google Workspace (from roughly $7 per user per month), so it's the obvious pick if your team already lives in Gmail and Docs. Microsoft Teams ships with Microsoft 365 and folds chat into video meetings and Office, making it the default for organisations already paying for Microsoft. These hosted options trade per-seat fees and someone else holding your data for zero maintenance on your side.
Self-host or pay per seat?
The honest math is the same as it is for any self-hosting decision. A self-hosted chat server (Mattermost, Rocket.Chat, Zulip, Element) costs a flat ~€4.49–6.80/month for the VPS regardless of headcount — but you own updates, backups, and uptime. A per-seat plan (Slack Pro, Google Workspace) costs nothing to maintain but scales with people: at ~$7–9 per user, a 20-person team is $140–180/month, every month. The break-even is low, so a team with someone willing to own the server usually saves a lot by self-hosting. If no one will, pay per seat and buy back the time. The same trade-off applies to your boards and files — see our Trello alternatives and Nextcloud alternatives guides — and if you'd rather not run the box, a managed VPS from WaseerHost takes patching and backups off your plate.
Which Slack alternative should you pick?
- Want the closest self-hosted Slack? → Mattermost, on a ~€6.80/month VPS.
- Want chat plus voice/video in one tool? → Rocket.Chat.
- Drowning in flat channels? → Zulip and its topic threads.
- Need end-to-end encryption or federation? → Element (Matrix).
- Just want free and hosted? → Discord (communities) or your existing Google Chat / Teams.
None of these is strictly "better than Slack" — they're better at one thing each: cost, ownership, threading, or encryption. Decide which you're actually missing, and the pick follows.
Frequently asked questions
What is the best free Slack alternative?
For self-hosting, Mattermost, Rocket.Chat, Zulip, and Element are all free and open-source — you pay only for the VPS, from about €4.49/month for a whole team with no per-user fees. For a free hosted option with no server to run, Discord is the most capable, though it's built for communities rather than businesses and lacks compliance and admin controls.
Is Mattermost better than Slack?
For self-hosting and data ownership, yes — Mattermost gives you a Slack-like experience you fully control, with no per-seat cost. Slack still wins on its huge third-party app marketplace and polish. If your workflow depends on niche Slack integrations, check they exist on Mattermost first; if you mainly need channels, threads, and DMs without the bill, Mattermost is the stronger choice.
What is Google's version of Slack?
Google Chat, included with Google Workspace. It offers spaces, direct messages, and tight integration with Gmail, Docs, and Meet, so it's the natural pick for teams already on Workspace (from roughly $7 per user per month). It's less extensible than Slack but removes a separate subscription if you already pay for Google.
Can I self-host a Slack alternative cheaply?
Yes. The software (Mattermost, Rocket.Chat, Zulip, Element) is free; your only cost is the VPS. A lightweight option like Zulip or Element runs on a 4 GB CX22 at about €4.49/month, while Mattermost and Rocket.Chat are happiest on an 8 GB CX32 around €6.80/month. One flat server bill covers the whole team, with no per-user charges as you grow.
Can I migrate my Slack history?
Often, yes. Slack can export workspace data, and Mattermost and Rocket.Chat both provide official Slack importers that bring over channels, users, and messages; Element and Zulip have import tooling too. Coverage varies — files, threads, and integrations may not map perfectly — so export a backup, run a test import, and verify before switching your team over.
Sources
- Hetzner Cloud — official pricing — CX22/CX32 VPS specs and price used for self-host cost
- Mattermost — official site — open-source, self-hostable team chat and Slack import
- Rocket.Chat — official site — open-source chat with voice/video and self-hosting
- Zulip — official site — open-source threaded team chat, self-hostable
- Element — official site — Matrix-based encrypted, federated chat
- Slack — pricing — current free and Pro plan tiers
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Waqas Ahmed Waseer
Waqas Ahmed Waseer is a developer and automation builder with 8+ years shipping production systems used by 100k+ people. He builds custom multi-tenant SaaS, AI automation (n8n, LLM workflows, WhatsApp bots) and hosting infrastructure (WHM/cPanel, CloudLinux) — and is the maker of WaSphere, FlowMaticX, and the WaseerHost hosting brand. 100+ projects delivered for SMBs, agencies and funded startups.
