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Team Communication

4 Best Slack Alternatives in 2026

Last updated July 6, 2026 · Prices verified from vendor sites

Slack set the standard for work chat, but its 90-day free-plan history limit and per-seat pricing send teams looking for cheaper, bundled, or self-hostable options. Below are the strongest Slack alternatives in 2026, with real vendor-verified pricing, honest pros and cons, and migration difficulty. Prices are list prices in USD as of the date shown and change often, so confirm on the vendor's site before you buy.

Our top pick: Microsoft Teams — Chat, meetings and Office bundled — often 'free' if you have Microsoft 365.

Comparison at a glance

Sort by price, rating or migration difficulty.

Pricing disclaimer: All prices are list prices in USD, shown for general information only as of July 6, 2026, and may have changed since. Plans, tiers and features vary by region and are frequently updated by each vendor. Nothing here is financial, legal or purchasing advice — always confirm current pricing and terms on the provider's official website before you buy.

·Tap a column header to sort
AlternativeStarting priceRating ▼MigrationBest for
Zulip
Open-source team chat with unique threaded conversations.
FreeFREE4.4 ★ModerateAsync, distributed or open-source teams that value threading and ownership.Visit
Mattermost
Self-hosted, open-source chat for security-conscious orgs.
FreeFREE4.2 ★HardSecurity- and compliance-driven orgs that must self-host their chat.Visit
Microsoft Teams★ Best
Chat, meetings and Office bundled — often 'free' if you have Microsoft 365.
$4/moFREE4.1 ★ModerateOrganizations already paying for Microsoft 365.Visit
Discord
Free, fast chat with voice — popular for communities and lean teams.
FreeFREE4.0 ★ModerateStartups, communities and lean teams that want free, casual chat.Visit

Comparing alternatives to Slack. Prices are list prices and may change.

The Slack alternatives in depth

1. Microsoft Teams

🏆 Best overall

Chat, meetings and Office bundled — often 'free' if you have Microsoft 365.

$4/mo
4.1 ★

Pricing: Free tier exists. Teams Essentials $4/user/mo; bundled in Microsoft 365 Business Basic $7/user/mo, Business Standard ~$12.50/user/mo (verified Jul 6, 2026).

Pros

  • ✔Effectively free if you already pay for Microsoft 365
  • ✔Strong video meetings included
  • ✔Enterprise-grade

Cons

  • ✕Clunkier UX than Slack
  • ✕Best value only in the Microsoft ecosystem
  • ✕Heavier and more complex
Best for: Organizations already paying for Microsoft 365. Migration: Moderate
Chat, video meetings & callingBundled with Microsoft 365Deep Office integrationLarge file & org support

Microsoft Teams is the pragmatic Slack alternative for any organization already paying for Microsoft 365 — because Teams is bundled in, the switch can be effectively free, which is a powerful argument against Slack's per-seat bill. It combines chat, video meetings and calling with deep Office integration and enterprise-grade scale. The trade-offs are well documented: the UX is clunkier and heavier than Slack's, and the value really only makes sense inside the Microsoft ecosystem. But for a company weighing Slack's cost against a Microsoft 365 subscription it already owns, Teams is the obvious, budget-driven choice, with migration tooling for channels and history.

Try Microsoft Teams

2. Discord

Free, fast chat with voice — popular for communities and lean teams.

Free
4.0 ★

Pricing: Free for team and community use. Nitro Basic $2.99/mo and Nitro $9.99/mo are optional personal enhancements (verified Jul 6, 2026).

Pros

  • ✔Genuinely free with no history limit
  • ✔Excellent always-on voice
  • ✔Great for communities

Cons

  • ✕Consumer/gaming feel, not corporate
  • ✕Weaker admin & compliance
  • ✕No formal SaaS support tier
Best for: Startups, communities and lean teams that want free, casual chat. Migration: Moderate
Free channels, voice & videoAlways-on voice roomsHuge community featuresBots & integrations

Discord started in gaming but has become a real Slack alternative for startups, open-source projects and communities — chiefly because it's free with no 90-day history wall, and its always-on voice channels beat Slack's huddles for casual collaboration. Nitro is a personal cosmetic upgrade, not a team paywall. The catch is tone and governance: Discord feels consumer rather than corporate, and its admin controls and compliance features are weaker, so regulated or enterprise teams should look elsewhere. But for a lean team or community that wants fast, free, voice-friendly chat without Slack's costs, Discord is a surprisingly capable — and genuinely free — switch.

Try Discord

3. Zulip

Open-source team chat with unique threaded conversations.

Free
4.4 ★

Pricing: Free plan (and open source, self-hostable). Standard $6.67/user/mo, Plus $10/user/mo (verified Jul 6, 2026).

Pros

  • ✔Open source — self-host and own data
  • ✔Threading keeps busy channels organized
  • ✔Cheaper than Slack

Cons

  • ✕Threading model takes adjustment
  • ✕Smaller ecosystem than Slack
  • ✕Self-hosting is technical
Best for: Async, distributed or open-source teams that value threading and ownership. Migration: Moderate
Topic-based threading modelOpen source & self-hostableGreat async communicationFull data export

Zulip's distinguishing feature is its threading model: every message belongs to a topic within a channel, which keeps busy, high-volume discussions far more organized than Slack's flat channels — a genuine win for async and distributed teams. It's open source and self-hostable, so you can own your data and escape per-seat cloud costs, and its cloud pricing ($6.67–$10/user) undercuts Slack. The topic model takes some adjustment, the ecosystem is smaller, and self-hosting is technical. But for an async-first, open-source-minded, or distributed team that finds Slack chaotic and expensive, Zulip is a thoughtful, ownable alternative, with a Slack importer built in.

Try Zulip

4. Mattermost

Self-hosted, open-source chat for security-conscious orgs.

Free
4.2 ★

Pricing: Free & open source (self-hosted). Paid Professional/Enterprise tiers are contact-sales — pricing pending verification (Jul 6, 2026).

Pros

  • ✔Complete data ownership & control
  • ✔Strong security/compliance posture
  • ✔Familiar Slack-like interface

Cons

  • ✕Requires self-hosting/infrastructure
  • ✕Public pricing not transparent
  • ✕IT overhead to run
Best for: Security- and compliance-driven orgs that must self-host their chat. Migration: Hard
Self-hosted & open sourceFull data control & complianceSlack-like UXDevOps & security integrations

Mattermost is the choice for organizations whose reason for leaving Slack is data sovereignty — government, defense, finance and security-conscious engineering teams that must self-host communications. It's open source with a familiar Slack-like interface, gives you complete control over your data and compliance, and integrates well with DevOps and security tooling. The trade-offs are real: you run the infrastructure, its paid tiers are contact-sales rather than transparently priced, and there's meaningful IT overhead. But when self-hosting and control are non-negotiable, Mattermost is the leading answer, and it imports Slack exports directly. (Paid pricing pending verification.)

Try Mattermost

What real users say about leaving Slack

Real discussions from Reddit — click any thread to read the full conversation at the source.

r/SlackLooking to switch
Slack alternatives?
r/webdevDiscussion
There are so many Slack alternatives, can anyone ...
r/selfhostedDiscussion
Are you happy with alternatives to Slack and Discord for ...
r/SlackLooking to switch
Reliable alternative to Slack?
r/selfhostedDiscussion
Slack alternatives
r/sysadminLooking to switch
What Slack alternative would you recommend
r/SlackLooking to switch
Looking for alternatives of slack
r/selfhostedDiscussion
Slack alternative for 100 pax company
r/salesforceDiscussion
Slack is extorting us with a $195k/yr bill increase
r/sysadminDiscussion
An extra cost of $24k/yr for 200 users in Slack
r/SaaSDiscussion
Slack's growth secret wasn't marketing - it was pricing that ...
r/SlackDiscussion
Slack pricing structure kills our use case
r/SlackLooking to switch
is Slack's pricing unsustainable for my use case?
r/SlackDiscussion
Salesforce Updates Slack Pricing to Expand Access to AI, ...
r/SlackLooking to switch
Has anyone managed a community on Slack? Is the ...
r/SlackDiscussion
Slack Connect - absurd pricing
r/SlackMigrated away
Anyone here moved from Teams to Slack? Or using ...
r/askmanagersMigrated away
Anyone here moved from Teams to Slack? Or using ...
r/SlackMigrated away
We Switched from Slack to Mattermost and Saved ...
r/SaaSMigrated away
Switched from Slack to email for customer communication. ...
r/MicrosoftTeamsDiscussion
Concerned about migrating from Slack to Teams
r/EntrepreneursMigrated away
Switched from Slack to email for all internal communication ...
r/sysadminDiscussion
Transitioning from Slack to Teams - Seeking advice
r/gsuiteDiscussion
Small company looking into switching from Slack (free) to ...

Thread titles and links are shown for reference and point back to Reddit. QikAlt does not reproduce comment content. Reddit is a trademark of its respective owner.

Slack guides

Frequently asked questions

What is the best free alternative to Slack?

Discord is free with no message-history limit and excellent voice, ideal for lean teams and communities. Zulip and Mattermost are free and open source (self-hostable), and Microsoft Teams has a free tier too.

Which Slack alternative is open source?

Zulip and Mattermost are both open source and self-hostable, the main draw for teams wanting to own their data and avoid per-seat cloud costs. Zulip also offers a hosted cloud plan.

Is Microsoft Teams cheaper than Slack?

Often effectively free — if your organization already pays for Microsoft 365, Teams is bundled in at no extra cost, versus Slack's $8.75–$18/user/mo. Standalone, Teams Essentials starts at $4/user/mo, still below Slack's Pro tier.

Which Slack alternative keeps full message history for free?

Discord keeps full history on its free plan, unlike Slack which hides messages older than 90 days on free. Self-hosted Zulip and Mattermost also retain all history since you control the data.

Why do teams leave Slack?

The top reasons are the free plan hiding messages older than 90 days, per-seat pricing that scales expensively, no self-hosting or data ownership, and steady price increases with features gated into higher tiers.

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