# Slack vs Zendesk

**Leader by vioscaleAI score:** Slack

| Attribute | Slack | Zendesk |
|---|---|---|
| **vioscaleAI score** | 78.7 (51% (medium)) | 68.2 (69% (medium)) |
| content.faq | `[{"answer":"A work operating system that combines messaging, workflow automation, and app integrations to enable team communication, process documentation, and knowledge sharing with enterprise security. It is indexed under Collaboration Software.","source":"https://slack.com","question":"What is Slack?","confidence":0.6},{"answer":"Slack offers a free tier, so you can start without paying. Paid plans start at £5.75 per user per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://slack.com","question":"Is Slack free?","confidence":0.6},{"answer":"Slack supports the web and iOS. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://slack.com","question":"What platforms does Slack support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Slack, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://slack.com","question":"Can Slack be self-hosted?","confidence":0.6},{"answer":"We have confirmed 15 integrations for Slack, including Salesforce, Atlassian, Lucid, Loom, Miro, Smartsheet, Mural and Zapier, plus 7 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://slack.com","question":"What does Slack integrate with?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Slack. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Slack not holding them. Always confirm compliance directly before you rely on it.","source":"https://slack.com/security","question":"What security certifications does Slack have?","confidence":0.7}]` | `[{"answer":"A cloud platform that deploys AI agents to handle customer and employee service requests. Agents improve with each interaction, manage high volumes autonomously, and operate across voice and digital channels without requiring technical configuration. It is indexed under Customer Support.","source":"https://www.zendesk.com","question":"What is Zendesk?","confidence":0.6},{"answer":"Zendesk offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.zendesk.com","question":"Is Zendesk free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Zendesk. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.zendesk.com","question":"What platforms does Zendesk support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Zendesk, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.zendesk.com","question":"Can Zendesk be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001 and HIPAA for Zendesk. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Zendesk not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.zendesk.com/security","question":"What security certifications does Zendesk have?","confidence":0.7}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | 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. | A cloud platform that deploys AI agents to handle customer and employee service requests. Agents improve with each interaction, manage high volumes autonomously, and operate across voice and digital channels without requiring technical configuration. |
| features.capabilities | `{"hosting":"cloud","sso_scim":true,"messaging":true,"api_access":true,"video_meetings":true,"app_marketplace":true,"deployment_model":"cloud_saas","compliance_controls":true,"guest_external_access":true,"recording_transcription":"recording_ai_notes","threaded_reply_conversations":true,"automated_workflow_bot_builders":true,"channel_based_topic_organization":true,"robust_message_search_and_history_indexing":true}` | `{"hosting":"cloud","ai_agent":true,"free_tier":true,"live_chat":true,"ticketing":true,"omnichannel":true,"knowledge_base":true,"voice_telephony":true,"deployment_model":"cloud_managed_saas","automation_macros":true,"reporting_dashboards":true}` |
| integrations.count | 2,500 | 1,800 |
| integrations.list | `[{"name":"Salesforce"},{"name":"Atlassian"},{"name":"Lucid"},{"name":"Loom"},{"name":"Miro"},{"name":"Smartsheet"},{"name":"Mural"},{"name":"Zapier"},{"name":"Microsoft 365","native":true},{"name":"Jira","native":true,"category":"project_management"},{"name":"GitHub","native":true,"category":"engineering"},{"name":"Google Workspace","native":true,"category":"authentication","direction":"inbound"},{"name":"Okta","native":true,"category":"authentication","direction":"inbound"},{"name":"ADFS","native":true,"category":"authentication","direction":"inbound"},{"name":"Zendesk","native":true}]` | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"ios":true,"web":true}` | `{"web":true}` |
| pricing | `{"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"]}` | `{"freeTier":true,"sourceUrl":"https://www.zendesk.com","retrievedAt":"2026-08-13T16:47:54.531Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | low | low |
| pricing.transparent | yes | no |
| reliability.status_page | yes | yes |
| security.disclosure_policy | yes | yes |
| security.fedramp | - | yes |
| security.gdpr | yes | - |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.soc2 | - | yes |
| security.trust_center | https://slack.com/blog/collaboration/security-at-slack-how-slack-protects-your-data | - |

*Source: vioscaleAI. Generated 2026-10-21T07:00:06.767Z. "-" = undocumented, not absent.*