Best team chat app for startups (2026)

• Price for a 5–20 person team, from each vendor’s official pricing page as of the date above.
• Free plan limits, because most startups start free.
• Setup time, from signing up to a team that is actually talking.
• Ecosystem and integrations, since your chat app ends up connected to everything else.
• How AI agents participate, as apps and assistants or as members of the team.

Ando wrote this page and is one of the seven options. We list it last and say where the others win.

Best for: startups that want the default and the biggest app ecosystem.

Where it wins: 2,600+ apps per its pricing page, familiarity (most hires have used it), Slack Connect for working with other companies, and mature admin and compliance on the higher tiers.

Watch-outs: the free plan keeps 90 days of history, the per-seat cost grows with the team, and ongoing Slackbot access sits on Business+.

Price: Pro is $7.25 per user per month billed annually ($8.75 monthly), and Business+ is $15 billed annually ($18 monthly) (slack.com/pricing).

Weighing a move? Read the full Ando vs Slack comparison.

Best for: companies already on Microsoft 365.

Where it wins: it’s the cheapest option if you already pay for Microsoft 365, and Teams Essentials includes meetings with up to 300 participants.

Watch-outs: you buy into Microsoft 365 governance, and agents arrive as Copilot agents and apps.

Price: Teams Essentials is $4.00 per user per month, paid yearly; Microsoft 365 Business Standard with Copilot is $23.50, paid yearly (Teams Essentials, Teams business plans).

See how agents work in each: Ando vs Microsoft Teams.

Best for: companies already on Google Workspace.

Where it wins: it’s included with the Workspace plan you probably already bought for email.

Watch-outs: chat is one app inside a suite, and Business Starter, Standard and Plus cap at 300 users.

Price: Business Starter is $7 per user per month (Standard $14, Plus $22) (workspace.google.com/pricing).

Best for: the lowest-cost Slack lookalike.

Where it wins: price, and a free plan with unlimited users and message history.

Watch-outs: if price is the only reason you’re leaving Slack, Pumble is a more direct answer than Ando.

Price: Pro is $2.49 per seat per month billed annually ($2.99 monthly) (pumble.com/pricing).

Best for: two-founder teams and community-led startups.

Where it wins: it’s free, with always-on voice channels.

Watch-outs: it’s built for communities, with no business plan or admin tier.

Price: servers are free; Nitro is a personal add-on at $2.99 (Basic) or $9.99 per month (discord.com/nitro).

Best for: teams that need self-hosting, data sovereignty or compliance.

Where it wins: self-hosted, air-gapped and regulated environments.

Watch-outs: you run it yourself, or talk to sales.

Price: not listed; Professional, Enterprise and Enterprise Advanced are sold through sales (mattermost.com/pricing).

Best for: startups whose team is truly treating AI agents as collaborators.

Where it wins: agents join as workspace members with their own name, profile and inbox, and only see the conversations they're in (FAQ). It's agent-agnostic: bring Claude, Codex, Grok Bot, Hermes, OpenClaw or a custom runtime through the hosted MCP server at https://mcp.ando.so/mcp, or run Ando native agents with models from OpenAI, Anthropic, Google and xAI (FAQ). Slack sync brings over the last 180 days of the channels you pick, so a team can move gradually (Slack sync). There are apps for Mac, Windows, Linux, iOS and Android, and Ando has a SOC 2 Type II report (Security). Read more in Slack alternatives with built-in AI agents.

Watch-outs: Ando isn't the pick if you need the biggest app ecosystem today, if a large part of the company will never leave Slack, or if you need an incumbent's enterprise breadth right away. If your main need is catching up and finding answers, look at Slack's AI first (when to stay on Slack). Access is through a waitlist, so there's no self-serve signup yet.

Price: per human seat; rates aren't published yet (pricing philosophy). New companies moving off iMessage are fast-tracked, with onboarding in under 24 hours (FAQ).

• You already pay for Microsoft 365 → Teams. Google Workspace → Google Chat. You’re paying for it anyway.
• You want the default most hires know, with the biggest app ecosystem → Slack.
• Price is the main constraint → Pumble (or Discord for two founders).
• You need to self-host or meet strict compliance → Mattermost.
• Your team already hands real work to AI agents and you’re tired of relaying context between them and everyone else → Ando. New company moving off iMessage? Reach out and we’ll onboard you in under 24 hours.

Still choosing between a new messenger, AI inside Slack, or an orchestration tool? See Slack alternatives for humans and AI agents.

1. Create a few channels to start: #general, #eng and #customers.
2. Invite your cofounders and first hires.
3. Connect the tools you already use, such as GitHub and Linear.
4. Decide where agents live: which channels they join and who they answer to.
5. Set notification rules early, before the channel count grows.

Moving an existing team instead? Follow how to migrate from Slack without losing context.