# Lark vs Slack

**Leader by Vioscale score:** Slack

| Attribute | Lark | Slack |
|---|---|---|
| **Vioscale score** | 80 (36% (low)) | 89.1 (51% (medium)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Unified platform combining messaging, video meetings, documents, workflows, and project management. Brings teams, tools, and workflows into one place to work faster, save costs, and stay in sync. | Slack is a cloud-based messaging and collaboration platform that enables teams to communicate, organize work, and integrate with tools across a unified workspace. Built-in AI capabilities and an extensive app ecosystem support businesses of all sizes. |
| features.capabilities | `{"hosting":"cloud","sso_scim":true,"free_tier":true,"messaging":true,"api_access":true,"video_meetings":true,"max_participants":"500 for video meetings","compliance_controls":true,"recording_transcription":"recording_ai_notes"}` | `{"hosting":"cloud","sso_scim":true,"free_tier":true,"messaging":true,"api_access":true,"screen_sharing":true,"video_meetings":true,"app_marketplace":true,"compliance_controls":true,"guest_external_access":true}` |
| integrations.count | - | 2,600 |
| integrations.list | - | `[{"name":"Salesforce"},{"name":"Jira"},{"name":"Google Drive"},{"name":"ChatGPT"}]` |
| market.availability | - | `{"primaryMarkets":["GB","US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"ios":true,"web":true}` | `{"ios":true,"mac":true,"web":true,"android":true,"windows":true}` |
| pricing | `{"type":"subscription","plans":[{"free":true,"name":"Starter","summary":"Free","features":["Team collaboration","20 users max","100 GB storage","1-on-1 video meetings","18 months message history","Unlimited real-time translation","1,000 automations/month","2,000 rows/table","Limited trial of Base AI"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For small teams with simple communication needs","contactSales":false,"includedLimits":{"users":"20","storage":"100 GB","message_history":"18 months","automations_per_month":"1,000"}},{"free":false,"name":"Basic","summary":"$6/user/month billed annually","features":["Team collaboration","500 users max","5 TB storage (expandable)","1-on-1 video meetings","Unlimited message history","Unlimited real-time translation","1,000 automations/month","2,000 rows/table","Expanded trial of Base AI"],"commitment":"annual","components":[{"kind":"per_unit","unit":"user","amount":6,"period":"month","currency":"USD"}],"description":"For growing companies with basic collaboration needs","contactSales":false,"includedLimits":{"users":"500","storage":"5 TB","message_history":"Unlimited","automations_per_month":"1,000"}},{"free":false,"name":"Pro","summary":"$12/user/month billed annually","features":["Team collaboration","500 users max","15 TB storage (expandable)","500-participant video meetings","Unlimited message history","Unlimited real-time translation","50,000 automations/month","20,000 rows/table","Expanded trial of Base AI","Base advanced permissions","Security & organizational controls","Frontline solution compatible","Communication and collaboration permissions"],"commitment":"annual","components":[{"kind":"per_unit","unit":"user","amount":12,"period":"month","currency":"USD"}],"description":"For companies with comprehensive collaboration and management needs","contactSales":true,"includedLimits":{"users":"500","storage":"15 TB","message_history":"Unlimited","meeting_participants":"500","automations_per_month":"50,000"}},{"free":false,"name":"Enterprise","summary":"Custom pricing, billed annually","features":["Team collaboration","Unlimited users","15 TB + 30 GB per user storage (expandable)","500-participant video meetings","Unlimited message history","Unlimited real-time translation","500,000 automations/month","50,000 rows/table","Expanded trial of Base AI","Base advanced permissions","Security & organizational controls","Frontline solution compatible","Communication and collaboration permissions","Single sign-on (SSO)","Advanced security & compliance controls"],"commitment":"annual","description":"For large companies with advanced security and organizational management needs","contactSales":true,"includedLimits":{"users":"Unlimited","storage":"15 TB + 30 GB per user","message_history":"Unlimited","meeting_participants":"500","automations_per_month":"500,000"}}],"addOns":[{"name":"AI Meeting Notes","components":[{"per":{"qty":1800,"unit":"notes"},"kind":"metered","amount":1699,"currency":"USD"}]},{"name":"Meegle Premium","components":[{"kind":"per_unit","unit":"user","amount":12,"period":"month","currency":"USD"}]},{"name":"Base automation expansion","components":[{"per":{"qty":50000,"unit":"automation runs"},"kind":"metered","amount":599,"currency":"USD"}]}],"summary":"Free to $12/user/month. Free Starter tier. Annual billing saves 16.6%.","currency":"USD","freeTier":true,"sourceUrl":"https://www.larksuite.com","retrievedAt":"2026-08-03T20:21:24.479Z","startingPrice":{"amount":6,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free forever","features":["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","SCIM user management","EMM integration support","Native data loss prevention","AI conversation summaries","Slackbot personal AI agent","AI workflow generation","AI search","AI daily recaps","AI file summaries"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"GBP"}],"description":"A simpler way to chat and collaborate","contactSales":false,"includedLimits":{"apps":"up to 10","message_history":"90 days"}},{"free":false,"name":"Pro","summary":"£7/user/month (£5.75/user/month billed annually)","features":["Unlimited message history","Unlimited app integrations","2,600+ apps in Slack App Directory"],"components":[{"kind":"per_unit","unit":"user","amount":7,"period":"month","currency":"GBP"},{"kind":"per_unit","unit":"user","amount":5.75,"period":"month","currency":"GBP"}],"description":"Drive productivity in one place","contactSales":false}],"summary":"From £0 (free tier) to £7/user/month (Pro). Free tier available.","currency":"GBP","freeTier":true,"sourceUrl":"https://slack.com","retrievedAt":"2026-08-05T14:23:07.180Z","startingPrice":{"amount":5.75,"period":"month","currency":"GBP"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | commercial |
| pricing.price_level | low | low |
| pricing.starting_gbp | 6 | 5.75 |
| pricing.transparent | yes | yes |
| reliability.status_page | yes | yes |
| security.disclosure_policy | - | yes |
| security.gdpr | yes | yes |

## Capabilities (Collaboration Software)

| Capability | Lark | Slack |
|---|:--:|:--:|
| **Modality** |  |  |
| Messaging | ✓ | ✓ |
| Video meetings | ✓ | ✓ |
| Whiteboard | - | - |
| **Meetings** |  |  |
| Screen sharing | - | ✓ |
| Recording / transcription | 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 | 500 for video meetings | - |
| **Ecosystem** |  |  |
| App marketplace | - | ✓ |
| Public API / bot framework | ✓ | ✓ |
| **Commercial** |  |  |
| Free tier | ✓ | ✓ |

*Source: Vioscale. Generated 2026-08-07T00:06:22.502Z. "-" = undocumented, not absent.*