Comparison

Lark vs Slack

On the evidence we track, Slack leads this comparison with a composite score of 79/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Lark full profile →Slack full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

Lark55

★Slack79

Attribute comparison across 2 tools
Attribute	Lark	SlackLeader
vioscaleAI score	55 / 100low · 44%	79 / 100medium · 51%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	unknown	low
Transparentpricing.transparent	✗	✓
Integrations
Countintegrations.count	-	2,500
Security
Certificationssecurity.certifications	SOC 2 Type II	-
Disclosure policysecurity.disclosure_policy	-	✓
Gdprsecurity.gdpr	✓	✓
Iso27001security.iso27001	✓	-
Soc2security.soc2	✓	-
Trust centersecurity.trust_center	-	https://slack.com/blog/collaboration/security-at-slack-how-slack-protects-your-data
Reliability
Status pagereliability.status_page	✓	✓
Market
Availabilitymarket.availability	Available worldwide	Available worldwide
Content
Faqcontent.faq	5 items	6 items

Score

vioscaleAI score

Lark55 / 100low · 44%

Slack79 / 100medium · 51%

Pricing

Free tier

Lark✓

Slack✓

Model

Larkcommercial

Slackcommercial

Price level

Larkunknown

Slacklow

Transparent

Lark✗

Slack✓

Integrations

Count

Lark–

Slack2,500

Security

Certifications

LarkSOC 2 Type II

Slack–

Disclosure policy

Lark–

Slack✓

Gdpr

Lark✓

Slack✓

Iso27001

Lark✓

Slack–

Soc2

Lark✓

Slack–

Trust center

Lark–

Slackhttps://slack.com/blog/collaboration/security-at-slack-how-slack-protects-your-data

Reliability

Status page

Lark✓

Slack✓

Market

Availability

LarkAvailable worldwide

SlackAvailable worldwide

Content

Faq

Lark5 items

Slack6 items

Capabilities

Feature-by-feature on the axes that matter for collaboration software. “-” means undocumented, not absent.

Capability comparison for Collaboration Software
Capability	Lark	Slack
Modality
Messaging	✓	✓
Video meetings	✓	✓
Whiteboard	-	-
Meetings
Screen sharing	-	-
Recording / transcription	Recording	Recording + AI notes
Security
End-to-end encryption	-	-
SSO / SCIM	-	✓
Access
Guest / external access	-	✓
Compliance
Compliance controls	✓	✓
Deployment
Hosting	Cloud only	Cloud only
Scale
Max participants	-	-
Ecosystem
App marketplace	-	✓
Public API / bot framework	✓	✓
Commercial
Free tier	✓	-

Modality

Messaging

Lark✓

Slack✓

Video meetings

Lark✓

Slack✓

Whiteboard

Lark-

Slack-

Meetings

Screen sharing

Lark-

Slack-

Recording / transcription

LarkRecording

SlackRecording + AI notes

Security

End-to-end encryption

Lark-

Slack-

SSO / SCIM

Lark-

Slack✓

Access

Guest / external access

Lark-

Slack✓

Compliance

Compliance controls

Lark✓

Slack✓

Deployment

Hosting

LarkCloud only

SlackCloud only

Scale

Max participants

Lark-

Slack-

Ecosystem

App marketplace

Lark-

Slack✓

Public API / bot framework

Lark✓

Slack✓

Commercial

Free tier

Lark✓

Slack-

What each one is

The product in its own terms, so the numbers below have context.

Lark

An all-in-one collaboration platform integrating chat, meetings, document management, and project tools, enhanced with AI-powered workflows and automation capabilities.

Independently observed

Slack

Leader

Slack is a cloud-based system that enables teams to communicate through channels, integrate with external tools, and automate workflows while maintaining enterprise-grade security and compliance controls.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Lark

from $6/moSubscriptionFree tier

Free to $12/user/month. Free Starter tier. Annual billing saves 16.6%.

StarterFree
- Team collaboration
- 20 users max
- 100 GB storage
- 1-on-1 video meetings
- 18 months message history
- +4 more
Basic$6/user/month billed annually
- Team collaboration
- 500 users max
- 5 TB storage (expandable)
- 1-on-1 video meetings
- Unlimited message history
- +4 more
ProContact sales
- Team collaboration
- 500 users max
- 15 TB storage (expandable)
- 500-participant video meetings
- Unlimited message history
- +8 more
EnterpriseContact sales
- Team collaboration
- Unlimited users
- 15 TB + 30 GB per user storage (expandable)
- 500-participant video meetings
- Unlimited message history
- +10 more

as of 2026-08-03verify ↗

Slack

Leader

from £5.75/moSubscriptionFree tier

From £0 (free tier) to £7/user/month (Pro). Free tier available.

FreeFree
- 90 days of message history
- Up to 10 apps from Slack App Directory
- 1:1 audio and video meetings with screen sharing
- 1:1 external messages via Slack Connect
- SAML-based single sign-on
- +9 more
Pro£7/user/month (£5.75/user/month billed annually)
- Unlimited message history
- Unlimited app integrations
- 2,600+ apps in Slack App Directory

as of 2026-08-05verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Lark	Slack
WebPlatforms	✓	✓
iOSPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✓

Platforms

Web

Lark✓

Slack✓

iOS

Lark✓

Slack✓

Deployment

Cloud / SaaS

Lark✓

Slack✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Lark

Not documented yet.

Slack

Leader

15 total

Salesforce
Atlassian
Lucid
Loom
Miro
Smartsheet
Mural
Zapier
Microsoft 365
Jira
GitHub
Google Workspace
Okta
ADFS
Zendesk

Independently observed

Still deciding?

Lark or Slack: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.