🤝 It's a Tie — Both tools are very closely matched. Your best choice depends on your specific workflow.
Feature
Lark
Slack
Rating
No ratings
No ratings
Free Plan
Starting Price
$12/mo
$7.25/mo
Monthly Visits
20.0M
120.0M
API Support
Open Source
AI Capabilities
Mobile App
Desktop App
Browser Extension
Integrations
3 apps
7 apps
Team Size
ENTERPRISE
ENTERPRISE
Lark Pros & Cons
Pros
- Genuinely bundles chat, docs, and meetings without feeling bolted together
- Built-in translation is useful for global/distributed teams
- Generous free tier for team size
Cons
- Less brand recognition and smaller ecosystem outside Asia
- Some users have data-residency/ownership questions given ByteDance ownership
- Smaller third-party integration marketplace than Slack or Teams
Slack Pros & Cons
Pros
- Massive list of app integrations
- Instant voice/video huddles simplify remote touchpoints
- Powerful, granular API and bot builder settings
Cons
- Quickly becomes expensive for large enterprise counts
- Free tier message limits force data loss in histories
- Distracting and easy to miss threads if not managed properly
Lark Key Features
- Chat with built-in translation
- Real-time collaborative docs & sheets
- Video meetings
- Workflow & approval automation
- Integrated calendar with scheduling
Slack Key Features
- Channels
- Huddles (Voice & Video)
- Canvas doc attachments
- Slack AI Summaries
- Workflow Builder