The best Slack alternatives, compared honestly
Slack still sets the bar for team chat and third-party integrations — but its 90-day free history, per-seat pricing and the 2025 Salesforce data-export lockdown push a lot of teams to look elsewhere. Here are seven credible alternatives, ranked by who they actually fit.
The best Slack alternative depends on what's hurting. In short:
- Already on Microsoft 365 → Microsoft Teams — bundled, from $4/user/mo.
- Self-hosting / open source → Mattermost, or Rocket.Chat & Element for data-sovereign and E2EE needs.
- Free & unlimited history → Discord, or self-hosted Zulip.
- On Google Workspace → Google Chat — bundled with Gmail, Drive & Meet.
Why teams look elsewhere
What pushes teams off Slack
Slack is rarely "wrong" — it's just more cost, and more lock-in, than many teams want. These are the recurring, well-documented reasons for switching.
90-day free history
Slack's Free plan only keeps the most recent 90 days of messages and files searchable; older content is locked behind an upgrade — the single most-cited reason small teams migrate.
Per-seat cost at scale
Pro is $7.25 and Business+ $15 per user per month (annual). Because billing is per active user, the bill scales linearly with headcount, and renewals often ratchet up year over year.
2025 price hike + AI bundling
In mid-2025 Business+ rose from $12.50 to $15/user/mo and the separate ~$10/user AI add-on was folded in — so advanced AI now means upgrading to Business+ at renewal.
API data-export lockdown
On 29 May 2025 Salesforce updated the Slack API terms to prohibit bulk data export and persistent archives, and to bar feeding Slack data to LLMs — raising real data-portability and lock-in concerns.
No self-hosting
Slack is SaaS-only — you can't run it behind your own firewall or in your own data center. Data residency exists only on higher tiers and still lives on Salesforce-managed shared infrastructure.
Notification overload
Always-on channels and pings drive documented context-switching fatigue. Tools with topic-threading (Zulip) or async-first design tame the noise Slack's flat channels create.
The shortlist
7 Slack alternatives worth trying
Ranked by fit for the typical team leaving Slack — price, data control and where you already work. Every pick lists a real trade-off, because none of them is Slack-for-everything.
The strongest all-round pick for most businesses, and free money if you're already on Microsoft 365 — chat, meetings and calls bundled with Office, from $4/user/mo standalone (Essentials). Free tier covers unlimited chat and 60-minute meetings. Trade-off: a heavier, busier UI than Slack, and thin value if you don't use the rest of Microsoft 365.
The leading open-source, self-hostable Slack replacement — the default in DevOps, government and regulated orgs that need on-prem or air-gapped data control. Free self-hosted tier with no message limits. Trade-off: self-hosting takes real IT effort, and the paid cloud tiers are enterprise-oriented rather than cheap for small teams.
Free, voice-first chat with unlimited message history — ideal for communities, open-source projects and informal teams that want a lively space at no cost. Trade-off: it isn't built for business, so there's no per-seat admin, compliance or governance layer, and it reads as consumer/informal.
Team messaging built into Google Workspace and wired straight to Gmail, Drive, Docs and Meet — the obvious choice if you already live there. Included from Business Starter ($7/user/mo). Trade-off: no standalone business plan (you pay for all of Workspace), and the chat product itself is thinner than Slack's.
Open-source chat with a distinctive topic-threading model that tames notification overload — a favorite of distributed and async-first teams. Cloud Free tier, Standard $6.67/user/mo (annual), and a free, unlimited self-hosted option. Trade-off: the threading model has a learning curve and the integration ecosystem is smaller than Slack's.
Open-source, self-hostable comms aimed at data-sovereign and regulated deployments (government, defense) that want full ownership plus customization. Free Community edition and a Starter tier for up to 50 users. Trade-off: self-managed deployments need ongoing ops, and the cloud "Pro" plan was retired to legacy in April 2026, so SaaS pricing now centers on contact-sales Enterprise.
End-to-end-encrypted chat on the open Matrix protocol, with federation and full self-hosting via the Element Server Suite — built for governments and security-first orgs wanting sovereign communications. Free, open-source Community edition. Trade-off: ecosystem and polish trail Slack and Teams, and running your own Matrix homeserver is a real undertaking.
Side by side
Slack alternatives compared
The dimensions that actually drive the switch off Slack: entry price, what the free tier really gives you, whether you can self-host, whether it's open source, and who each one fits. Our top overall pick is highlighted.
| Platform | Entry paid (per user/mo) | Free tier | Self-hostable | Open source | Best for |
|---|---|---|---|---|---|
| Slack (baseline) | Pro $7.25 · Business+ $15 | 90-day history | ✗ | ✗ | Richest 3rd-party app ecosystem |
| Microsoft Teams | $4 (Essentials) | Unlimited chat, 60-min meetings | ✗ | ✗ | Microsoft 365 shops |
| Mattermost | $10 (Professional)* | Self-hosted, unlimited | ✓ | ✓ | Self-hosted / compliance / DevOps |
| Discord | No business tier† | Unlimited history, voice/video | ✗ | ✗ | Communities, OSS, informal teams |
| Google Chat | $7 (Workspace Starter) | Personal Google acct only | ✗ | ✗ | Google Workspace shops |
| Zulip | $6.67 (Standard) | Cloud Free + free self-host | ✓ | ✓ | Async teams; notification overload |
| Rocket.Chat | Enterprise (contact sales)* | Community + Starter (≤50) | ✓ | ✓ | Data-sovereign / regulated |
| Element | ~$5 (Business)* | Community self-hosted | ✓ | ✓ | E2EE, federated, gov / security |
*Mattermost, Rocket.Chat and Element paid figures come from vendor plan pages plus 2026 secondary listings and are contact-sales in places — confirm current terms. †Discord has no per-seat business plan; its paid tiers are personal Nitro subscriptions. Pricing and free tiers change often — check each vendor. Compiled July 2026 from each vendor's official pricing pages.
Official pages: Microsoft Teams · Mattermost · Discord · Google Chat · Zulip · Rocket.Chat · Element · Slack pricing
A fair call
When Slack is still the right choice
Switching isn't automatically the answer. Here's the honest split between staying and moving.
Slack is fine if…
- You rely on its huge third-party app ecosystem and best-in-class integrations.
- Your team already works fast in Slack and the switching cost outweighs the savings.
- You're on a paid plan, so the 90-day free-history limit doesn't apply to you.
- You want the most polished, responsive chat UX and don't need self-hosting.
Consider an alternative if…
- You already pay for Microsoft 365 or Google Workspace → Teams or Google Chat come bundled.
- You need on-prem, air-gapped or data-sovereign control → Mattermost, Rocket.Chat or Element.
- You want free, unlimited history → Discord, or self-hosted Zulip.
- Notification overload is the real problem → Zulip's topic-threading model.
Common questions
Slack alternatives — common questions
What is the best Slack alternative?
It depends on your stack. Microsoft Teams is the strongest overall alternative for most businesses — especially if you already pay for Microsoft 365, since Teams is included and starts at $4/user/mo standalone. If you need self-hosting or open source, Mattermost is the leading pick; for communities and free unlimited chat, Discord is hard to beat.
What is the cheapest Slack alternative?
For paid business plans, Microsoft Teams Essentials at $4/user/mo (annual) is the cheapest credible per-seat option. If free is the goal, Discord keeps unlimited message history at no cost, and self-hosted Mattermost, Zulip, Rocket.Chat or Element cost $0 in licensing — you only pay for the server you run them on.
What is the best free Slack alternative?
Discord offers the best hosted free tier for general use — unlike Slack's 90-day cap, Discord keeps unlimited message history at no cost. If you can self-host, Zulip and Mattermost give you a full, unlimited, business-grade platform for free with no artificial message limits.
What is the best self-hosted or open-source Slack alternative?
Mattermost is the most popular open-source, self-hostable choice and is widely used in DevOps, government and regulated environments. Zulip, Rocket.Chat and Element (on the Matrix protocol) are also fully open source and self-hostable; Element adds end-to-end encryption and federation for the most security-sensitive deployments.
What is the best Slack alternative for Microsoft or Google shops?
If your company runs Microsoft 365, use Microsoft Teams — it's bundled, integrates natively with Outlook, SharePoint and Office, and starts at $4/user/mo. If you run Google Workspace, use Google Chat, which is included in every Workspace plan (from Business Starter at $7/user/mo) and ties directly into Gmail, Drive, Docs and Meet.
Is Microsoft Teams better than Slack?
Teams is better on price and integration if you already use Microsoft 365, and it has stronger built-in meetings and compliance controls. Slack generally wins on user experience, speed and its far larger third-party app ecosystem. For a Microsoft-centric company Teams usually wins on total cost; for a best-in-class chat experience with many integrations, many teams still prefer Slack.
Can I migrate my Slack message history to another tool?
Yes, though it can be limited. Slack lets workspace owners export public (and, on some plans, private) channel content, and Microsoft provides an official Slack-to-Teams migration tool; tools like CloudFuze and Cloudiway can carry over channels, timestamps, attachments and DMs, and Zulip has a built-in Slack importer. Since May 2025 Salesforce's Slack API terms restrict bulk API exports and persistent copies, so large-scale migrations may need to rely on the manual export file rather than the API.