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

open source password manager, great LastPass alternative (1) · open-source Slack alternative with omnichannel support (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)

bitwarden.com (1) · nextcloud.com (1) · nextcloud.com/calendar (2) · rocket.chat (1)

free (5)

Commercial/Government/Defense tiers are custom-priced (free self-hosted Community edition available) (1) · 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 tier covers unlimited passwords/devices for individuals; Teams $4/user/mo, Enterprise $6/user/mo (open-source server, self-hosting 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)

open (5)

hybrid (3) · 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) · MIT-licensed, self-hostable team chat with channels, voice/video, and broad integration support. Its omnichannel inbox unifies live chat, email, WhatsApp, and Telegram into one agent queue -- useful if you also want to replace a separate customer-support tool, not just internal chat. (1) · Open-source password manager: unlimited passwords and devices on the free tier, cross-platform sync, autofill. Officially self-hostable, and the community-run Vaultwarden server is a lightweight alternative implementation for orgs that want to run it themselves. (1)

None (2) · Has the most GitHub momentum of the self-hosted Slack alternatives (~45k stars). The free Community edition covers most day-to-day needs; exceeding Starter-plan limits blocks adding new users but does not lock you out of existing data. (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) · Password Management (1) · Team Collaboration (1)