Drilldown: tool

Proton Mail (1) · Rocket.Chat (1)

adf dsaf asdffdf dd d · AI co-pilot for Palestine advocacy · cloud task manager with kanban and time tracking · encrypted email with a free tier · event promotion and ticketing platform · free self-hosted accounting software · free uptime monitor with email alerts · free volunteer-run MediaWiki hosting for any wiki · Linux VPS provider for self-hosted infrastructure · locally edit wiki files in markdown then deploy · open source CRM built for nonprofits · open source password manager, great LastPass alternative · open-source Slack alternative with omnichannel support · open-source Slack alternative with self-hosted free tier · proprietary cloud office suite, not recommended · self-hosted groupware with built-in office editing · self-hosted office suite with real-time editing · shared scheduling on your existing Nextcloud · shared scheduling via self-hosted Nextcloud · team messaging with channels and threads, not recommended · team messaging with channels threads and integrations · Other · None

https (2)

proton.me/mail (1) · rocket.chat (1)

free (1) · recurring/mo (1)

$4.99/mo, or $3.99/mo billed annually (free tier available) (1) · Commercial/Government/Defense tiers are custom-priced (free self-hosted Community edition available) (1)

open (2)

cloud (1) · hybrid (1)

None (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)

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) · Zero-access encryption means Proton cannot read message content or hand it over even under legal request -- worth flagging for teams handling sensitive organizing communications. No self-hosting option; mail is hosted on Proton's own infrastructure in Switzerland. (1)

None (2)

Email (1) · Team Collaboration (1)