The 6 best Slack alternatives for agencies in 2026

Slack popularised channel-based team chat, and for pure messaging it’s still excellent. The problem for agencies isn’t Slack itself — it’s everything that lives around it. A typical studio runs chat in one app, projects in another, social scheduling in a third, meetings in a fourth and HR in a fifth, then pays to wire them together. This guide covers six credible alternatives, grouped by what you’re actually trying to fix.

If you want a better (or cheaper) chat tool

Microsoft Teams is the obvious pick if you already pay for Microsoft 365 — chat, calls and file storage come bundled. It’s heavier than Slack and less pleasant for quick back-and-forth, but the price is hard to beat inside a 365 shop.

Google Chat makes sense for Google Workspace teams: it’s tightly tied to Gmail, Drive and Meet. It’s simpler than Slack, with fewer integrations, but it’s effectively free if you’re already on Workspace.

Mattermost is the choice for teams that need self-hosting or strict data control — it’s open-source and can run on your own infrastructure. That power comes with setup and maintenance overhead most small agencies won’t want.

Discord is worth a mention for community-style teams and creators. Voice channels are excellent and it’s free, but it isn’t built for client work — no real project tracking, approvals or business features.

If the real problem is “too many tools”

Swapping Slack for another chat app only moves the problem sideways — you still need projects, meetings, social and HR somewhere else. Two options collapse the stack instead:

Basecamp bundles messaging, to-dos, docs and scheduling in one calm, flat-priced app. It’s a solid fit for teams that want simplicity, though it deliberately skips things like a Kanban board, video calls, social scheduling and HR.

CO-MSG takes the all-in-one idea further and builds it for agencies specifically: channels and DMs, built-in HD video calls with AI meeting notes, projects and Kanban, social scheduling, CRM, finance, HR — and an AI workforce — under one login. Any client message turns into a tracked task in two clicks, so chat and delivery stay connected instead of drifting into separate apps.

How they compare at a glance

Prices change often and depend on plan and billing term, so we’ve left them out here — always check each vendor’s current pricing. For reference, CO-MSG is free for up to five members and $20/user/month on Pro. You can estimate what consolidating would save with our savings calculator.

So which should you pick?

If you love Slack and only want cheaper chat, Teams or Google Chat will do the job inside an existing Microsoft or Google subscription. If you need self-hosting, Mattermost. But if you keep paying for five subscriptions that don’t talk to each other, the bigger win is consolidating — and that’s exactly what CO-MSG is built for.

Want the head-to-head? Read CO-MSG vs Slack, or see the Connect Hub and pricing.