If you’ve ever stared at your company’s SaaS bill and felt your stomach drop, you know exactly how expensive basic team tools can get. Slack, once the scrappy upstart for startup chat, now costs up to $15 per user every month for most business plans. For a 20 person team that’s $3,600 a year just for sending messages and sharing files. That’s why so many managers and founders are hunting for 8 Cheaper Alternatives to Slack that don’t force you to choose between functionality and budget.

Most teams don’t need every fancy feature Slack adds these days. You don’t need custom emoji packs for every holiday, or AI chatbots that summarize coffee break conversations. What you do need is reliable messaging, file sharing, thread support, and basic integrations that work without crashing every Tuesday. This guide breaks down every top low-cost option, what each one does best, hidden fees to avoid, and exactly which team type each tool fits perfectly. By the end you’ll know exactly which tool to test this week without wasting hours on locked free trials.

1. Mattermost: Open Source Option For Privacy Focused Teams

Mattermost is the most popular open source alternative to Slack, and it costs a fraction of what you’ll pay for Slack’s business plans. For teams that want full control over their data, this is the first option you should test. Unlike Slack which stores all your team messages on third party servers, you can run Mattermost entirely on your own hardware or cloud account that you already pay for.

The paid business plan for Mattermost starts at just $3.75 per user per month, less than a quarter of Slack’s standard business tier. Even the free plan has no message history limits, something Slack removed back in 2022 for all free users. You get all the core features teams rely on every day:

• Threaded public and private channels
• File uploads up to 100MB per file
• Video call support for 15 participants
• Native integrations with Google Workspace, GitHub and Zoom

The biggest tradeoff here is setup work. If you choose to self host, you will need someone on your team with basic server experience to get everything running properly. For teams that don’t want that hassle, Mattermost also offers managed cloud hosting that still comes in well under Slack’s pricing. Most teams report zero noticeable difference in day to day use once everyone is set up.

This tool works best for engineering teams, remote companies with strict data rules, and any team with more than 10 people that will hit Slack’s message limits fast. Small 2 or 3 person teams might find it overkill, but for any growing team the cost savings add up extremely fast. A 30 person team will save over $4000 per year switching from Slack to Mattermost’s paid plan.

2. Discord: The Surprising Free Option For Fast Moving Teams

Most people still think Discord is only for gaming groups, but thousands of startups and creative teams have quietly switched over in the last three years. It’s not just for streaming Minecraft anymore. Discord’s core feature set matches almost everything most teams use Slack for, and the vast majority of teams will never need to pay a cent for it.

The free tier of Discord has no message history limits at all. You can create unlimited private channels, share files up to 25MB, and run voice calls with up to 50 people for free. The first paid tier only costs $2.99 per user per month if you do want extra features. Compare that to Slack’s lowest paid tier at $7.25 per user, and the math is very clear.

Feature	Discord Free	Slack Free
Message History Limit	Unlimited	90 Days
Max Voice Call Size	50 People	2 People
Max File Upload	25MB	5MB

There are some minor tradeoffs. Discord doesn’t have native calendar integrations out of the box, and thread organization works a little differently than Slack. Most people adjust within 2 days of regular use. You can add most common business integrations with simple bots, and new official business features roll out every quarter.

This works perfectly for creative teams, freelance collectives, early stage startups, and any group that does a lot of voice check ins. Avoid it if you need enterprise compliance tools or formal audit logs for regulated industries. For everyone else? It’s the best free option on this list by a very wide margin.

3. Zulip: Thread-First Chat For Focused Remote Teams

Zulip built its entire tool around fixing the biggest complaint people have about Slack: constant notification overload. Instead of endless scrolling channels, every message lives inside a clear topic thread. This design means you can catch up on 1000 unread messages in 10 minutes, instead of wasting an hour scrolling.

Pricing starts at $3 per user per month for the standard business plan, and the free tier never expires for teams under 10 people. Unlike almost every other chat tool, Zulip does not lock core features behind paywalls. Even free users get full message history, unlimited integrations and 5GB of file storage per team.

When evaluating Zulip, remember these key differences from Slack:

1. You must assign a topic to every message you send
2. Notifications are muted by default for non-mention messages
3. Mobile app loads 2-3x faster than the official Slack app
4. No custom animated stickers or social features

Teams that hate constant distractions fall in love with Zulip immediately. Teams that use chat for casual watercooler talk will find the structure annoying at first. This is the single best option for fully remote teams that work across multiple time zones, where people regularly catch up on messages sent hours earlier.

4. Google Chat: Zero Extra Cost For Google Workspace Users

If your team already uses Gmail, Google Drive and Calendar, you already have access to Google Chat for free. You don’t need to sign up for anything new, add another bill, or teach your team a whole new tool. This is the most underrated budget option on this entire list.

Google Chat comes included with every paid Google Workspace plan, which already starts at $6 per user per month for the full suite of tools. That means you effectively get team chat for $0 extra, compared to paying an additional $7-$15 per user for Slack on top of your Google bill.

All core chat features work exactly as you would expect. You get private channels, threads, file sharing that links directly to Drive, and one-click video calls through Google Meet. Integrations work natively with every Google tool, plus most popular project management apps like Asana and Trello.

The biggest downside is that advanced admin controls are limited compared to Slack. You also won’t find thousands of third party niche integrations. But for 90% of small and medium teams that already live in Google tools, this is the most logical, lowest friction switch you can make. You won’t even notice the difference after one week.

5. Rocket.Chat: Customizable Self Hosted Chat For Any Team Size

Rocket.Chat sits right between Mattermost and Discord for most use cases. It is fully open source, offers both self hosted and managed cloud plans, and has one of the most flexible customization systems of any chat tool on the market.

Managed cloud plans start at $2 per user per month, making this the cheapest paid professional option available. Even at that price point you get unlimited message history, video calls, admin audit logs and SSO login. You can also modify every part of the interface to match your team’s workflow, something no closed tool like Slack will ever let you do.

• Ideal for teams that need white label chat for clients
• Built-in live chat support for public websites
• Works offline for internal office networks
• No user limits even on the lowest paid tier

The tradeoff comes with polish. The interface feels a little clunky compared to Slack, and some third party integrations require manual setup. For teams that value cost and flexibility over sleek design this doesn’t matter at all. For teams that want something that works perfectly out of the box, you will prefer other options on this list.

This is the best pick for agencies, IT teams, and companies that need to add chat to their own products. You can run an entire 100 person team on Rocket.Chat for less than a 10 person team pays for Slack standard.

6. Microsoft Teams: Free For Microsoft 365 Subscribers

Just like Google Chat comes with Google Workspace, Microsoft Teams is included for free with every Microsoft 365 subscription. If your company uses Word, Excel or Outlook already, you have already paid for this tool. Most teams just never bother turning it on.

For teams already in the Microsoft ecosystem, switching will save you 100% of your Slack bill. Everything integrates natively: you can edit Office files right inside chat threads, schedule meetings from Outlook, and share files from OneDrive without ever leaving the app.

Plan	Microsoft Teams Cost	Slack Equivalent Cost
Free	$0	$0
Business Standard	Included with $12.50 M365	$7.25 extra per user
Enterprise	Included with enterprise license	$15 extra per user

Teams gets a lot of unfair criticism, and most of the old performance complaints have been fixed in the last two years. The app loads fast, calls are reliable, and admin controls are actually better than Slack for larger organizations. It also supports far larger video calls than Slack for all user tiers.

This is the obvious choice for any team that already uses Microsoft tools. Even if you don’t, the free standalone tier is good enough for most small teams. The only reason to avoid it is if you refuse to use any Microsoft products at all.

7. Twist: Asynchronous Chat For Deep Work Teams

Twist was built specifically for teams that don’t want to be available 24/7. It ditches the live chat feeling entirely, and builds everything around calm, organized communication that people can respond to when they have time.

Pricing starts at $5 per user per month, which is still 30% cheaper than Slack’s standard plan. For that price you get unlimited message history, file storage, calendar integration and full admin controls. There is also a generous free tier for teams of 5 or less people.

Twist works very differently from Slack:

1. No green online status indicators to create pressure
2. All messages auto archive after 7 days of inactivity
3. Notifications are fully disabled by default outside work hours
4. Every conversation is organized by clear topics

Teams that value deep work will wonder how they ever used anything else. Teams that rely on real time fast back and forth will hate it. This is perfect for design teams, writers, developers and any group where constant interruptions kill productivity. You will get more work done, and no one will complain about after hours messages ever again.

8. Element: Secure Encrypted Chat For Sensitive Teams

Element is the only tool on this list that offers true end to end encryption for every single message, call and file. If your team talks about sensitive client data, legal information or internal company plans, this is the safest chat tool you can use.

Paid business plans start at $4 per user per month, less than half the price of Slack. Even free users get full end to end encryption, unlimited channels and 10GB of file storage. No one, not even the company running the servers, can read your team’s messages.

You get all standard chat features plus some extra security tools most other tools don’t offer: password protected file shares, expiring messages, and verified user logins. It also connects to the open Matrix network, so you can chat with people using other tools without switching apps.

The interface is simple and clean, though it takes a day or two to learn all the security settings. This is the best pick for legal teams, healthcare companies, security teams and anyone that values privacy over extra features. You will never have to worry about leaked internal chats again.

At the end of the day, there is no perfect team chat tool — but there absolutely is a perfect one for your specific team and budget. You don’t have to keep paying Slack’s rising prices just because everyone else uses it. Every tool on this list will handle day to day messaging, file sharing and team calls reliably, and most teams will save between 60% and 90% on their chat tool bill after switching. Don’t jump into a year long contract right away: test one or two options with your core team for one week first, and ask everyone what actually works for their daily workflow.

Most teams waste hundreds or thousands of dollars every year on SaaS tools they don’t fully use, and Slack is one of the most common culprits. Pick one option from this list that matches your team size and needs, run a free trial this week, and stop overpaying for features you will never open. Even if you only save $100 a month, that’s money you can put toward raises, better tools, or just keeping your budget under control.