Drilldown: tool

Akaunting (1) · Bitwarden (1) · CiviCRM (1) · Mattermost (1) · Nextcloud (1) · OnlyOffice (1) · Rocket.Chat (1)

free self-hosted accounting software (1) · open source CRM built for nonprofits (1) · open source password manager, great LastPass alternative (1) · open-source Slack alternative with omnichannel support (1) · open-source Slack alternative with self-hosted free tier (1) · self-hosted groupware with built-in office editing (1) · self-hosted office suite with real-time editing (1)

https (7)

akaunting.com (1) · bitwarden.com (1) · civicrm.org (1) · mattermost.com (1) · nextcloud.com (1) · onlyoffice.com (1) · rocket.chat (1)

free (7)

Cloud DocSpace Business $20/admin/mo; self-hosted Enterprise license from $1,500 (50 connections) (1) · Commercial/Government/Defense tiers are custom-priced (free self-hosted Community edition available) (1) · Free tier covers unlimited passwords/devices for individuals; Teams $4/user/mo, Enterprise $6/user/mo (open-source server, self-hosting available) (1) · Professional $10/user/mo; Enterprise custom pricing (self-hosted free tier available) (1) · Self-hosted is free (single user/accountant); Cloud-hosted plans $12-218/mo (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) · Software is free; self-host on existing infra, or managed CiviCRM hosting from roughly $10-100/mo depending on tier (1)

open (7)

cloud · hybrid · self · Other · None

None (2) · 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 CRM purpose-built for nonprofits and advocacy groups -- donor tracking, campaign management, event registration, and membership -- rather than a generic sales CRM repurposed for fundraising. Integrates as a plugin into WordPress, Drupal, or Joomla. (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) · Self-hostable double-entry accounting: invoicing, online payments, expense tracking, multi-currency, unlimited bank/cash accounts. The free self-hosted tier is limited to one user and one accountant -- fine for a single bookkeeper, not for a team that needs shared access. (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 · Syncs with any CalDAV-compatible client (Thunderbird, most phone calendar apps) so people aren't locked into a web UI. · Choose the region closest to your primary users to minimize latency. Enable automatic backups ($1.20/month at the entry tier) from the start — restoring from a snapshot is far easier than rebuilding from scratch. · Even the self-hosted install requires an API key that calls home to Akaunting's servers to validate your license tier -- worth knowing if full data sovereignty (no external dependency at all) is a hard requirement, since this isn't quite that despite being open source. · Explore active campaigns from the Campaigns tab. Mobile apps available on iOS (App Store) and Android (Google Play). · 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. · Guest access available on paid plans for external collaborators. Slack Connect allows cross-organization channels with other Slack workspaces. · 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. · See https://www.mediawiki.org/wiki/Miraheze for an overview of available extensions and account setup. No cost, donation-supported; account required to create a new wiki. · See the repo README for local setup and deployment instructions. · The free plan supports up to 20 email alert recipients — sufficient for most small organizations. Webhook triggers allow integration with custom scripts or chat tools on status changes. · Use Board view for kanban-style tracking across teams. Guest access is available on paid plans for external collaborators. · 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. · Other

None (7)

Donor & Volunteer CRM (1) · Finance&Accounting (1) · Office Suite (2) · Password Management (1) · Team Collaboration (2)