Element vs Slack

Element

• Governments and regulated organizations that self-host encrypted chat
• Organizations that need air-gapped deployments
• Groups that want to federate with other Matrix servers
• Individuals and communities who want a free encrypted messenger

Slack

• Teams that want conversations organized by channel rather than email threads
• Companies that work with outside partners in shared channels
• Organizations that already run on Salesforce
• Teams that connect many third-party apps to their chat

Element

• No prices are published: Enterprise is priced per seat per month and Sovereign per deployment, both through sales, and Enterprise starts from 100 users.
• The free Community server edition covers 1 to 100 users and, the vendor says, is not intended for production in commercial environments.
• For organizations, the pricing page lists only self-hosted and air-gapped deployments; it does not list a plan hosted by Element.
• Whitelabelled apps and the cross domain gateway are sold as add-ons.

Slack

• The Free plan keeps only 90 days of message history searchable, allows 10 apps, and limits huddles and Slack Connect to 1:1.
• SAML single sign-on and SCIM start at Business+; ongoing Slackbot access is on Business+ and Enterprise+, with a limited trial on Free and Pro.
• Enterprise search, multiple SAML configurations and native data loss prevention are limited to Enterprise+, which is priced by sales.
• In a browser, huddles are supported only in Chrome and Firefox.

Element

End-to-end encryption by default

The platform is end-to-end encrypted by default, including voice and video, and devices are verified by QR code or an emoji string.

Rooms and messaging

Rooms organize team discussions, with threads, read receipts, attachments, voice messages, polls, reactions, invite-only private rooms and unlimited history.

Element Call

End-to-end encrypted voice and video for 1:1 and group conversations. Element Call is also included in the free Community server edition.

Matrix federation

Built on the Matrix open standard, so separate organizations can communicate across servers and frontends. Administrators can enable or block federation.

Element Server Suite

The self-hosted backend. Pro adds the Synapse Pro homeserver, auto-scaling, high availability, an admin interface, LDAP and SCIM integration, and auditing.

Widgets and integrations

Interactive apps can be embedded in rooms, including a whiteboard (NeoBoard) and project management tools such as OpenProject and Jira, alongside bots.

Slack

Channels and direct messages

Conversations are organized into channels for each project, topic or team, alongside direct messages. Paid plans keep the full message and file history searchable; Free keeps 90 days.

Huddles and clips

Huddles are audio and video meetings with screen sharing, 1:1 on Free and for groups on paid plans. Clips are recorded audio or screen updates shared in a conversation.

Slack Connect

Message people outside the company. Free allows 1:1 external direct messages; paid plans add group chats and shared channels with up to 250 organizations.

Canvases and lists

A canvas holds text, files, images and video inside Slack, and lists are used to manage projects and organize tasks with teammates.

Workflow Builder and apps

Workflow Builder automates routine processes without code, and the app directory lists more than 2,600 apps. A Free workspace can connect up to 10 of them.

AI in Slack

Pro includes AI conversation summaries. Business+ adds AI search, daily recaps, file summaries, workflow generation and the Slackbot personal agent, subject to plan limits.

Element

• Community$0

  Self-hosted Element Server Suite Community: open source under AGPL, for 1 to 100 users, with Element Call. Not meant for commercial production use.

• EnterpriseCustom

  Self-hosted Element Server Suite Pro from 100 users, priced per seat per month through sales: Synapse Pro, SSO, LDAP, auditing and SLA-backed support.

• SovereignCustom

  Air-gapped Element Server Suite Pro, priced per deployment, with a dedicated mobile push gateway and no dependence on internet connectivity.

Slack

• Free$0

  90 days of message history, up to 10 app integrations, and 1:1 huddles and external messages.

• Pro$7.25

  per user / month, billed annually ($8.75 billed monthly)

  Unlimited message history and app integrations, group huddles, Slack Connect channels with up to 250 organizations, and AI conversation summaries.

• Business+$15

  per user / month, billed annually ($18 billed monthly)

  Adds AI search, daily recaps, file summaries and workflow generation, the Slackbot agent, SAML single sign-on and SCIM user management.

• Enterprise+Custom

  Adds enterprise search across connected apps, multiple SAML configurations, EMM support, native data loss prevention and unlimited workspaces.

Element

No public discounts listed.

Slack

• Annual discount

  About 17% less with annual billing

  Pro is $7.25 per user / month paid annually against $8.75 paid monthly, and Business+ is $15 against $18. Salesforce's Slack pricing page puts the saving at approximately 16%.

• Other savings

  50% off the first 3 months for new teams

  A limited-time offer for teams that buy Pro or Business+ online within 7 days of creating the workspace. It applies to monthly billing only, and standard pricing follows after 3 months.

• Nonprofit

  Free or 85% off for eligible nonprofits

  Eligible nonprofits get a free Pro upgrade for workspaces with 250 or fewer members and 85% off above that size. Business+ is 85% off at any size.

• Education

  85% off for educational institutions

  The Slack for Education program gives approved institutions an 85% discount on the Pro or Business+ plan, applied at checkout.