Slack vs Element Server Suite Community

Fit:

Migration notes

Matrix rooms, federation and encryption differ from Slack channels and app workflows. Plan identity, integration and history transfer separately; no verified one-click importer or bridge parity claimed.

Sources: github.com · checked 2026-10-21

SlackPaid incumbent

Entry priceUSD 7.25 / seat / month

Pricing modelper-seat, billed annual

OwnerSalesforce, Inc. (NYSE: CRM)

Pro standard annual price per user/month; free plan available; temporary introductory discount excluded. Source

Slack plans reviewed
Pro	entry	USD 8.75 / user / mo
Business+	business	USD 18 / user / mo
Enterprise+	enterprise	Quote only

Element Server Suite CommunityOpen-source alternative

Fit for Slack

License

GNU Affero General Public License v3.0 Permissions of this strongest copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. When a modified version is used to provide a service over a network, the complete source code of the modified version must be made available. May Commercial useModificationDistributionPatent usePrivate use Must License and copyright noticeState changesDisclose sourceNetwork use is distributionSame license No LiabilityWarranty Summary from GitHub's choosealicense.com

Paid-feature tier B

Self-host

Paid-feature limits2 noted

Element Server Suite Community plans reviewed
ESS Community	self-hosted core	Free
ESS Pro	paid self-hosted commercial suite	Quote only
ESS Pro	paid self-hosted commercial suite	Quote only

What you may give up

ESS Pro adds Synapse Pro autoscaling, high availability and multi-tenancy.
Advanced IAM, audit/compliance and central management are Pro features.

Tier B: Complete Matrix stack with Synapse, Matrix Authentication Service, Element Web and Element Call. Identified repo is suite deployment distribution, not just the client. No hard 100-user cap; commercial use allowed by repository FAQ, although vendor recommends Pro for commercial production. License source

What running it takes

Synapse, Matrix Authentication Service, Matrix RTC backend and Element Web
HAProxy and ingress/TLS/DNS

Hover or focus an icon for its name. Dashed means not established; struck through means no; grouped icons are alternatives.

Documented default deployment path; optional services are separate from core runtime. No unverified backend alternatives asserted. Infrastructure and staff time are not priced here; this page does not compare total cost.