Best Microsoft Teams alternatives for developers

Why engineering teams look beyond Teams

Teams is built around meetings and the Microsoft 365 suite. That is a strength for most of a company, but engineers often find it slow for quick written back-and-forth, hard to drive from the keyboard, and far from their code tools. The options below are faster at written work, each with its own trade-offs.

When to stay on Teams

If your company runs on Microsoft 365 and most collaboration happens in meetings, Teams is often already paid for and well integrated. Many teams keep it for meetings and add a dedicated chat tool for engineering.

1. Hasarak

Best for engineering teams that want fast written chat with docs and their AI tools.

Where it's strong

• One inbox for mentions, thread replies and DMs; Vim keys in the Minimal style
• Pages with Mermaid diagrams next to the channel, edited together
• A built-in MCP server and @ai with your own AI accounts
• Works alongside Teams: keep Teams for meetings

Where it falls short

• No video meetings or calling
• No Microsoft 365 integration
• Web app only for now; desktop and mobile apps aren't released yet
• Hosted only

Try Hasarak free

2. Slack

Best for companies that want the mainstream work chat with the biggest ecosystem.

Where it's strong

• Huge app directory
• Huddles and Slack Connect

Where it falls short

• A separate subscription on top of Microsoft 365
• No official terminal client

Hasarak vs Slack, side by side

3. Google Chat

Best for companies moving to, or already on, Google Workspace.

Where it's strong

• Included with Workspace
• Close ties to Gmail, Drive and Meet

Where it falls short

• Only makes sense if you use Workspace
• No terminal client

Hasarak vs Google Chat, side by side

4. Zulip

Best for async-heavy teams that want open source.

Where it's strong

• Topics keep discussions organized
• Cloud or self-hosted, open source

Where it falls short

• No video meetings built in
• Topics take getting used to

Hasarak vs Zulip, side by side

5. Mattermost

Best for regulated organizations that need self-hosted chat.

Where it's strong

• Self-hosted, including air-gapped
• Compliance and audit features

Where it falls short

• You operate it
• Paid plans go through sales

Hasarak vs Mattermost, side by side

6. Element

Best for organizations that need encryption and data sovereignty.

Where it's strong

• End-to-end encrypted by default
• Federation and self-hosting

Where it falls short

• Operational overhead
• Fewer work integrations

Hasarak vs Element, side by side