Comparing Teams vs Slack vs Zoom on cost looks at first like a feature contest. In practice the bigger question for most buyers is not which is best but which they are paying for unnecessarily. A large share of mid market firms run all three at once: Teams because it comes with Microsoft 365, Slack because a team adopted it, and Zoom because it became the meeting default. Each does a job, but the jobs overlap heavily, and paying three vendors for one capability is one of the most common forms of collaboration overspend.
As an independent, buyer side advisor with no vendor relationship and no commission, we do not care which tool you keep. We care that you are not paying for the same capability three times. This guide compares the list prices, maps where the overlap sits, and sets out the consolidation question. It connects up into the wider digital workplace cost optimization effort, because collaboration overlap is where some of the easiest savings live.
Teams vs Slack vs Zoom: what each tool actually costs
Start with the headline prices, then read past them. The list prices below are a starting point, not the number you will pay, but they frame the comparison.
| Tool | Common paid tier | List price per user per month |
|---|---|---|
| Microsoft Teams | Included in Microsoft 365 E3 and E5 | Bundled, no separate charge on those plans |
| Slack | Pro | From 8.75 US dollars on annual billing |
| Zoom | Business | From around 18.32 US dollars on annual billing |
Prices are vendor list prices from microsoft.com, slack.com, and zoom.com, as of June 2026, on annual billing. Slack and Zoom both offer multiple tiers and negotiated enterprise pricing, and all three vendors revise pricing regularly, so confirm against current quotes.
The single most important line in that table is the first one. If you license Microsoft 365 E3 or E5, you already pay for Teams. It is bundled at no separate charge. That means any spend on Slack or Zoom is spend on capability you may already own, which is exactly the overlap worth examining.
Where the three tools overlap
The reason firms end up paying three times is that the tools have grown into each other. Teams does chat, meetings, and calling. Slack does chat and, increasingly, huddles and calls. Zoom does meetings, and now chat, phone, and team messaging too. What were once three distinct products are now three overlapping ones, each pitching to be your single platform.
Chat and messaging
Persistent team chat is core to both Teams and Slack and is now a Zoom feature as well. For most organisations this capability only needs to live in one place. Running it in two means split conversations, duplicated cost, and the friction of people not knowing where to look. Our guide on internal chat tool rationalization works through the choice.
Meetings and video
Video meetings are Zoom's heartland, but Teams meetings have closed much of the gap and are included in your Microsoft 365 plan. The question for many firms is whether Zoom's strengths justify a separate contract when Teams meetings come free with a suite you already pay for. We look at this directly in do you need Zoom if you have Microsoft Teams.
The consolidation question
For most Microsoft 365 customers the cost logic points one way: Teams is already paid for, so the saving comes from consolidating onto it and dropping the separate Slack or Zoom contracts where they are not essential. That does not mean Teams is the best tool for every team in every case. It means that keeping a paid alternative needs a justification beyond habit, because the alternative is a real recurring cost set against a capability you already own.
The honest answer is that some teams have a genuine need that justifies keeping Slack or Zoom, and many do not. The work is separating the two. Standardising on a primary platform, as covered in standardising on one collaboration platform, does not have to mean a single tool everywhere, but it does mean a default that everyone uses unless there is a clear reason not to. That default, for a Microsoft 365 shop, is usually Teams on cost grounds alone.
What consolidation actually saves
The saving from consolidation is not a trimmed contract, it is a removed one. Dropping Slack across an organisation of a few thousand users removes the entire Slack line. The same for Zoom where Teams meetings will serve. Because these are per user recurring costs, the annual figure is substantial, and because Teams was already paid for, the saving is close to pure. This is why eliminating overlapping tools, covered in eliminating overlapping collaboration tools, tends to deliver more than negotiating any single contract down.
Where to start
Start by confirming what you already own. If you license Microsoft 365 E3 or E5, you have Teams, and any Slack or Zoom spend is overlap to justify or remove. Then look at actual usage: how many people genuinely use the paid alternative, and for what. The teams with a real need keep their tool with a clear rationale. The rest move to the platform you already pay for. The comparison between Teams, Slack, and Zoom is rarely about which is best. It is about not paying three vendors for one job.