Drilldown: tool

Akaunting (1) · Bitwarden (1) · CiviCRM (1) · Eventbrite (1) · Mattermost (1) · Montastic (1) · Nextcloud (3) · OnlyOffice (1) · Rocket.Chat (1)

event promotion and ticketing platform (1) · free self-hosted accounting software (1) · free uptime monitor with email alerts (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) · shared scheduling on your existing Nextcloud (1) · shared scheduling via self-hosted Nextcloud (1)

https (11)

akaunting.com (1) · bitwarden.com (1) · civicrm.org (1) · eventbrite.com (1) · mattermost.com (1) · montastic.com (1) · nextcloud.com (1) · nextcloud.com/calendar (2) · onlyoffice.com (1) · rocket.chat (1)

free · recurring/mo · Other · None

None · $8.75/user/month (free tier available) · $4.99/mo, or $3.99/mo billed annually (free tier available) · $6/month (entry-level Droplet: 1 GB RAM, 1 vCPU, 25 GB SSD NVMe) · $7-22/user/mo (Starter/Standard/Plus, annual billing) -- no self-hosted or free tier · $7/user/month (free tier available) · Cloud DocSpace Business $20/admin/mo; self-hosted Enterprise license from $1,500 (50 connections) · Commercial/Government/Defense tiers are custom-priced (free self-hosted Community edition available) · Free -- it's an app on top of the Nextcloud instance you already run · 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). · 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). · Free tier covers unlimited passwords/devices for individuals; Teams $4/user/mo, Enterprise $6/user/mo (open-source server, self-hosting available) · paid plans from $5/mo · Professional $10/user/mo; Enterprise custom pricing (self-hosted free tier available) · Self-hosted is free (single user/accountant); Cloud-hosted plans $12-218/mo · 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. · Software is free; self-host on existing infra, or managed CiviCRM hosting from roughly $10-100/mo depending on tier · Other

closed (2) · open (9)

cloud (2) · hybrid (7) · self (2)

None (4) · 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) · 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 (5) · 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. (1) · 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) · 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) · 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. (1)

None (11)

Calendars (2) · Donor & Volunteer CRM (1) · Finance&Accounting (1) · Monitor Site for Outages (1) · Office Suite (2) · Outbound Comms (1) · Password Management (1) · Team Collaboration (2)