For a pilot, a free tier works. But limits on features and support mean the first compliance request or outage can force an upgrade under time pressure, which is the worst moment to negotiate. ## Mattermost against Slack, Teams, Rocket.Chat and Zulip Judge the upgrade you may be forced into against rivals now, while you can still choose, because **Mattermost is rarely the cheapest entry price**. The table shows which rivals can be self-hosted and where each puts its gates; take from it that only Slack and Teams rule out running it yourself. | | Entry paid price | Free tier | Self-hosting | Paid-tier gates | |---|---|---|---|---| | Mattermost | $10 (Professional), annual billing only | Self-hosted free edition | Yes | Compliance and support | | Slack | $7.25–$8.75 (Pro) | Limited history | No | Security, compliance | | Microsoft Teams | Bundled with Microsoft 365 | Limited | No | Plan-dependent | | Rocket.Chat | Per-user tiers | Self-hosted free edition | Yes | Enterprise controls | | Zulip | $6.67–$8 (Standard) | Limited | Yes | Hosted support | viz type=groupedbars title="What paying monthly adds to Slack and Zulip plans" unit="$ per user per month" source="Slack - https://slack.com/pricing" cols="Annual billing,Monthly billing"8 versus On Slack, [Slack](https://slack.com/pricing) charges $7.25 per user per month for Pro on annual billing and $8.75 monthly, so month-to-month flexibility costs about 20% more. Business+ is $15 annually and $18 monthly. [SaaSRFP](https://saasrfp.com/blog/slack-pricing-and-alternatives) puts Enterprise+ at $45, triple Business+, which means the compliance features you need can triple the bill. Teams avoids that ladder only if you already pay for Microsoft 365. At $6.67 annually and $8 monthly, Zulip Standard is the cheapest paid entry here, which means this is the minimum cost anyone pays for a paid plan. Rocket.[Chat](https://chat.zulip.com/plans/) and Zulip let you keep data on your own servers, but the work of patching, backing up and answering outages lands on your ops team. Choose Slack or Teams if you want no servers to run and can absorb the ladder. Choose Zulip if price is the constraint. Choose Mattermost when self-hosting and compliance are required, and accept that it won't be cheapest.  ## Lowest plan for your needs Accept that Mattermost won't be cheapest. **You can still buy the least of it: pick the lowest plan that clears your requirements, not the one sized to your headcount.** What I see most is the ticket "can we get SSO turned on?" It arrives with no mention of audit, and the answer sits in one person's head. The path below puts those questions in order so the answer is shared. It shows that each requirement can push you up a tier and none can push you down, so work through them in sequence and stop at the first one you can't meet. 1. State your compliance requirements: any audit, retention or regulatory obligation you must prove. 2. Check whether you need single sign-on, or whether local accounts are acceptable. 3. Set the support response time you can live with when chat is down. 4. Decide how much control over deployment you need: where it runs and who operates it. 5. Land on the free plan, the first paid tier, or a quoted enterprise agreement. If steps one to three came back empty, no formal compliance duty, local accounts, and a team that can wait on community help, the free plan fits. Your cost is the staff time to run it. When one requirement, usually SSO or a guaranteed support response, would otherwise land on someone's evenings, pay for the first tier. Price the ticket queue you avoid, not the seats. Ask for a quote when compliance and deployment control combine, such as regulated data on infrastructure you must keep isolated. At that point the list price no longer applies, so negotiate. ## Sending automated alerts into Mattermost with Activepieces Cheaper Mattermost is not what Activepieces delivers. It does make the plan you pay for do more work: through its **746 integrations, roughly 60% of them community-contributed**, it carries alerts and approval requests from other apps into a channel, so the team stops relaying them by hand. Both products are open source and can be self-hosted, which keeps the hosting decision with you. ### The task it automates Think of the ticket that comes back every week: "Did the nightly export finish?" Someone checks a spreadsheet, finds the answer, and pastes it into chat. The next person asks the same thing tomorrow, because the answer lives in one person's head and one person's tab. In place of that habit, an Activepieces flow does the work, and since every plan, free included, allows unlimited flows, adding it costs no extra seat or tier. In the builder, a Schedule trigger set to run every hour starts the flow.  A spreadsheet step then reads the rows you care about, using actions such as Find Rows, and a final step posts the result to a Mattermost channel. Before anything goes live, the test panel lets you generate sample data and see a successful run, which means you find the broken step on a Tuesday afternoon rather than during an incident. The screenshot shows that setup: the hourly trigger selected, the spreadsheet integration picker open, and a passing test result on the right. What follows is the part support and ops teams care about: the answer sits in a shared channel, where anyone can read it, reply to it and approve it. ### What to confirm before building Before you commit, check the Activepieces documentation for the Mattermost integration. Whatever it offers, **Activepieces bills one credit per flow run**, so a ten-step alert-and-approval flow costs what a two-step workaround does, and the Plus plan's 10,000 credits at $20 a month cover 10,000 such runs.  That matters because the sound design is many small steps: read the rows, filter, format, post, wait for approval. Zapier's pricing page bills per task and Make's per module, so each of those steps adds to the bill there; on Activepieces the free plan's 1,000 credits a month count runs, and the steps inside them go uncounted. Also decide where the flow runs. Activepieces has an MIT-licensed core you can self-host, and every plan can run on its cloud or on-prem. If you self-host both tools, you carry the maintenance for both. If Mattermost is hosted for you, make sure Activepieces can reach it and that your compliance rules allow alert content to leave one system for another. ## A Monday checklist for pricing Mattermost accurately Once alerts are flowing, the next ticket is usually finance asking what it costs. The accurate answer comes from checking your own requirements against the plans, not from the list price. Write those down before anyone quotes a number, so the answer lives in a shared document instead of one person's memory. The figures above are dated 2026-10-31 because prices change, and a stale figure in a budget thread becomes the number everyone remembers. Treat the vendor's pricing page as the source and run these steps in order: 1. Reconfirm every figure on the pricing page the day you build the estimate, and note the date. 2. Count real active users: people who actually post or read, not everyone with an account. 3. List your must-have features, and mark each one as required by compliance, by support, or just preferred. 4. Compare your self-hosting estimate, including the hours someone spends on upgrades and outages, with the hosted plan. 5. Request a quote using those numbers, so the sales conversation starts from your facts. Nothing appears on the invoice for the free plan, but it doesn't cost nothing to run. Someone patches it, restores it and answers the 2 a.m. page, and that person's time is real money.  Check your must-have list against what the free plan actually covers. If a compliance or support requirement is missing, the free plan isn't a cheaper version of what you need, only a different product. ## Frequently asked questions Most of the questions below come back to one ticket: "Can we just use the free one?" Here are the short answers, with the pricing page as the authority when a term matters. ### Free tier and self-hosting Is Mattermost free to use? Yes, there's a free tier, and it suits small teams without compliance or support obligations. It's the product the previous section described: a different offering, not a trimmed paid one. Check the current feature list on the [Mattermost pricing page](https://mattermost.com/pricing/) before committing. Can I self-host Mattermost without paying? Yes, you can run the free edition on your own servers without a license fee. What you pay instead is hosting, upgrades, backups and whoever gets paged when it breaks. That person's time is a real cost, even though it never appears on an invoice. ### Licensing and discounts Does Mattermost charge for inactive or deactivated users? Licensing is generally based on active users, so a deactivated account shouldn't count the way a live one does. Confirm the exact counting rule in your order form, and deactivate leavers promptly. Otherwise the headcount you renew at isn't the headcount you actually have. Is there a discount for nonprofits, education or government? Mattermost has historically offered special arrangements for some of these groups, but terms vary and I wouldn't assume one applies to you. Ask sales directly, and put the answer in writing before you build a budget around it. ### Changing plans Can I switch Mattermost plans mid-term? Moving up is usually the easy direction. Moving down typically waits for renewal. Your contract governs both, so read the term and change clauses before signing, not after the first support ticket forces the question. ## Related reading - [Housecall Pro Pricing (2026): Plans by Team Size](https://www.activepieces.com/blog/housecall-pro-pricing-2026-plans-by-team-size) - [ChatGPT Team Pricing 2026: Plans, Seats & API Costs](https://www.activepieces.com/blog/chatgpt-team-pricing-2026-plans-seats-api-costs) - [Segment Pricing 2026: Free, Team and Business Plans](https://www.activepieces.com/blog/segment-pricing-2026-free-team-and-business-plans) ## References - [Slack](https://slack.com/pricing) - [Nephometrics](https://www.nephometrics.ch/2023/05/running-mattermost-in-aws-how-much-will-it-cost/) - [SaaSRFP](https://saasrfp.com/blog/slack-pricing-and-alternatives)You choose a plan by what your auditor or security team requires, not by headcount, so a small regulated team can land on a higher tier than a large unregulated one.