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tool > pricing: free & amount: Other & usage notes: None

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None (4) · End-to-end encrypted 1:1 and group messaging, plus voice/video calls, built on the audited Signal Protocol (Double Ratchet + X3DH). ~40M monthly users. Registration requires a phone number; usernames (added 2024) let you start chats without sharing it. (1) · End-to-end encrypted chat on the Matrix open standard. Anyone can run a homeserver and servers federate like email; Element is the reference client. 115M+ addressable accounts, with bridges to Signal, Telegram, WhatsApp and others. (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) · Nonprofit-oriented crowdfunding platform charging no platform fee, explicitly open to individuals, social enterprises, and unregistered community groups, not just registered charities. Scale (per Chuffed's own reporting): 50,000+ organizers, 2.5M+ supporters, $275M+ raised to date. (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) · Open-source video conferencing usable instantly with no account via the free public instance, or self-hosted for full control over data and infrastructure. (1) · Zero-fee fundraising, ticketing, and membership platform for nonprofits. Scale (per Zeffy's own reporting): 100,000+ nonprofits, $2B+ raised to date. (1)
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