Team communication
Slack alternatives
4 credible replacements for Slack, compared on price, capability and the reasons teams actually leave. 3 of them cost less per seat.
Free · 3 minutes · Emailed to you
The honest case
Why teams replace Slack
Slack is the default team chat tool, with the deepest app directory of any. These are the specific reasons it stops fitting.
- 01
The free plan hides messages older than 90 days, which quietly makes history unusable
- 02
Business+ pricing roughly doubles the bill the moment you need SAML or data exports
- 03
Guest and connect seats add up fast when you work with agencies or clients
If none of those describe your situation, staying is probably the right answer. Switching costs real weeks, and a tool that merely annoys you is usually cheaper to keep than to replace.
4 alternatives
What to replace Slack with
Ranked here by price. Ranked properly once you tell us about your team.
Chat and meetings bundled into Microsoft 365, so the marginal cost is often zero.
$4/seat · cheaper than Slack
Topic-threaded chat designed so asynchronous and distributed teams can catch up quickly.
$6.67/seat · cheaper than Slack
Open-source, self-hostable team chat built for regulated and air-gapped environments.
$10/seat · dearer than Slack
Prices are unverified estimates — useful for comparing orders of magnitude, not for budgeting. Confirm the current figure with the vendor before you commit to anything.
In detail
What each one is actually good at
And what it costs you in exchange — every tool here trades something away.
Discord
freeFree, fast, voice-first chat that scales to very large communities.
- No per-seat cost at all, at any team size
- Always-on voice rooms people drop into rather than schedule
- Handles tens of thousands of members without degrading
Watch outNo SAML SSO, no SOC 2 posture aimed at enterprise buyers, no compliance exports.
Mattermost
$10/seatOpen-source, self-hostable team chat built for regulated and air-gapped environments.
- Runs entirely inside your own infrastructure, including air-gapped
- Data residency is whatever you decide it is
- Slack-compatible enough that import and muscle memory both survive
Watch outSelf-hosting is a real, ongoing operations cost — budget for the people, not just the licence.
Microsoft Teams
$4/seatChat and meetings bundled into Microsoft 365, so the marginal cost is often zero.
- Already paid for if you licence Microsoft 365 — often the cheapest viable option
- Meetings, chat and files in one product, with real PSTN dial-in
- Compliance, retention and eDiscovery that satisfy regulated buyers
Watch outThe client is heavy, and channel/thread structure frustrates teams used to Slack.
Zulip
$6.67/seatTopic-threaded chat designed so asynchronous and distributed teams can catch up quickly.
- Every message lives under a named topic, so catching up takes minutes not hours
- Free for open-source and non-profits, cheap otherwise, self-hostable if you prefer
- Genuinely the best fit for teams spread across many time zones
Watch outThe topic model needs a real onboarding push — teams that skip it revert to chaos.
Questions
Slack alternatives, answered
What is the best alternative to Slack?
There is no single answer — it depends on your team size, budget and non-negotiables. In team communication the credible alternatives are Discord, Mattermost, Microsoft Teams, Zulip. Discord is the most common starting point because free, fast, voice-first chat that scales to very large communities. Our three-minute questionnaire ranks all of them against your specific answers rather than guessing.
Is there a free alternative to Slack?
Yes. Discord, Mattermost, Microsoft Teams, Zulip all offer a free tier, though the limits differ significantly — usually on history, seats, or exactly the features that pass a security review. Check what the free tier withholds before you plan around it.
Why do teams stop using Slack?
The recurring reasons are: The free plan hides messages older than 90 days, which quietly makes history unusable; Business+ pricing roughly doubles the bill the moment you need SAML or data exports; Guest and connect seats add up fast when you work with agencies or clients. None of these mean Slack is a bad product — they mean it stops fitting certain teams as those teams change shape.
How much does Slack cost?
$8.75/seat/mo, which works out at roughly $5,250 a year for a 50-person team. That excludes the add-ons most teams end up buying, and it is our unverified estimate rather than a quote — confirm it with the vendor before budgeting.
How hard is it to migrate off Slack?
It depends on history, integrations and headcount far more than on the tool itself. For a team of 50 with a handful of integrations, expect a few weeks of elapsed time and one to two weeks of actual work. Above 200 people, or with compliance in scope, plan a quarter. The questionnaire produces a scoped estimate with line items if you would rather not run it yourself.
Which of these is right for your team?
A price table cannot tell you. Answer about a dozen questions and get these 4 ranked against your team size, budget and requirements — plus what it would cost to move off Slack.
Rank them for my team