Drilldown: tool

Nextcloud · Salesforce · Akaunting · asd · Bitwarden · CiviCRM · ClickUp · DigitalOcean · Doikayt Mobilization Labs · Eventbrite · Google Workspace · Mattermost · Miraheze · Montastic · OnlyOffice · Proton Mail · Rocket.Chat · Words of Justice · Other · None

event promotion and ticketing platform (1) · open-source Slack alternative with self-hosted free tier (1) · self-hosted groupware with built-in office editing (1) · shared scheduling on your existing Nextcloud (1) · shared scheduling via self-hosted Nextcloud (1)

https (5)

eventbrite.com (1) · mattermost.com (1) · nextcloud.com (1) · nextcloud.com/calendar (2)

free (5)

Free -- it's an app on top of the Nextcloud instance you already run (1) · Free -- zero extra cost if you already run Nextcloud (e.g. for Office Suite). If not, standing up Nextcloud itself is also a free self-hosted install (see that entry for full pricing/hosting details). (1) · Free events are always free. Paid tickets: ~3.7%+$1.79/ticket plus 2.9% payment processing, no fee cap. Pro email tiers $15-100/mo (nonprofits get 50% off after verification). (1) · Professional $10/user/mo; Enterprise custom pricing (self-hosted free tier available) (1) · Self-hosted is free, no user limit. Enterprise support from EUR 67.89/user/yr (100-user minimum). Nextcloud One managed hosting ~EUR 13-15/user/mo. (1)

closed (1) · open (4)

cloud (1) · hybrid (2) · self (2)

None (2) · CalDAV-based shared calendaring app bundled with Nextcloud: team calendars, event invites, resource booking. Zero extra infrastructure if your org already runs Nextcloud for Office Suite (see that entry for full pricing/hosting details) -- this is just enabling the calendar app on the same instance. (1) · Event listing, promotion, and ticketing -- event pages, RSVP/ticket sales, and email promotion to an audience list. Free to publish and manage free events with no platform fee; fees only apply to paid ticket sales. (1) · Self-hostable, MIT-licensed team chat closely modeled on Slack's channel-based UX -- includes a Slack export/import path to ease migration. Free self-hosted tier runs indefinitely with no per-seat licensing cost; paid tiers add SSO, compliance exports, and HIPAA/FedRAMP-aligned deployment options. (1)

None (2) · Fewer native integrations than Slack out of the box -- most third-party connections go through incoming/outgoing webhooks rather than a marketplace, so budget some setup time. Good fit for teams that want a near drop-in Slack replacement and value Go-based, ops-friendly self-hosting. (1) · Syncs with any CalDAV-compatible client (Thunderbird, most phone calendar apps) so people aren't locked into a web UI. (2)

None (5)

Calendars (2) · Office Suite (1) · Outbound Comms (1) · Team Collaboration (1)