Open-source software stack for nonprofits
For charities and community organisations that want to spend less on software and keep supporter data on infrastructure they control.
13 tools · picks reviewed Oct 2026
Your savings
$9,009
per year for a team of 10
$11,229 paid tools today − $2,220 to run it
The stack
Tap a tool for detailsSavings use list prices. Many vendors give nonprofits discounts or free plans, so your real saving may be smaller.
All 13 tools
Switch off anything you don't pay for today and the savings update.
- Why
- Donors, volunteers and gift history in custom objects you design; EspoCRM is a more traditional option.
- Licence
- AGPL-3.0-only60.2K stars
- Replaces
- Bloomerang · Bloomerang CRM (billed yearly) · $125/mo · checked Oct 2026 · $1,500/yr
- Also good
- EspoCRM
- Why
- Newsletters and appeals to large supporter lists, sent through your own email provider.
- Licence
- AGPL-3.0-only24.1K stars
- Replaces
- Mailchimp · Standard, 1,500 contacts · $45/mo · checked Oct 2026 · $540/yr
- Also good
- Mautic
- Why
- Volunteer sign-ups, event registrations and surveys on your own server.
- Licence
- AGPL-3.013.2K stars
- Replaces
- Typeform · Basic (billed yearly) · $28/mo · checked Oct 2026 · $336/yr
- Why
- Shared folders, calendars and office editing for staff and volunteers.
- Licence
- AGPL-3.037.4K stars
- Replaces
- Dropbox · Business Standard · $18/user/mo · 10 seats · checked Oct 2026 · $2,160/yr
- Why
- Chat for staff and volunteers, with a channel per programme.
- Licence
- AGPL-3.039.5K stars
- Replaces
- Slack · Pro (billed yearly) · $7.25/user/mo · 10 seats · checked Oct 2026 · $870/yr
- Also good
- Element
- Why
- Board meetings and volunteer calls in the browser, with no accounts for guests; BigBlueButton for trainings.
- Licence
- Apache-2.030.2K stars
- Replaces
- Zoom · Workplace Pro (billed yearly) · $14.16/user/mo · 3 seats · checked Oct 2026 · $510/yr
- Also good
- BigBlueButton
- Why
- Boards for campaigns, events and grant deadlines.
- Licence
- AGPL-3.0-only61.8K stars
- Replaces
- Asana · Starter (billed yearly) · $10.99/user/mo · 10 seats · checked Oct 2026 · $1,319/yr
- Also good
- Vikunja
- Why
- Policies, handbooks and meeting notes in one shared wiki.
- Licence
- AGPL-3.0-only22.2K stars
- Replaces
- Notion · Plus (billed yearly) · $10/user/mo · 10 seats · checked Oct 2026 · $1,200/yr
- Also good
- BookStack
- Why
- Bookkeeping, bills and reports for a small finance team; ERPNext for larger organisations.
- Licence
- GPL-3.0-only10.3K stars
- Replaces
- QuickBooks · Online Simple Start · $38/mo · checked Oct 2026 · $456/yr
- Also good
- ERPNext
- Why
- Schedules campaign posts across every network, with approvals.
- Licence
- AGPL-3.040.2K stars
- Replaces
- Buffer · Essentials, 10 channels (billed yearly) · $50/mo · checked Oct 2026 · $600/yr
- Why
- Shared logins for social accounts and services that stay safe when volunteers change.
- Licence
- AGPL-3.070K stars
- Replaces
- 1Password · Business (billed yearly) · $7.99/user/mo · 10 seats · checked Oct 2026 · $959/yr
- Also good
- Bitwarden
- Why
- Grant agreements, volunteer forms and board resolutions signed online.
- Licence
- AGPL-3.019K stars
- Replaces
- DocuSign · Standard (billed yearly) · $25/user/mo · 2 seats · checked Oct 2026 · $600/yr
- Also good
- Documenso
- Why
- Cookie-free visitor stats for your website and campaign pages.
- Licence
- MIT39.8K stars
- Replaces
- Fathom Analytics · 100k pageviews · $15/mo · checked Oct 2026 · $180/yr
- Also good
- Plausible Analytics
How we calculate
For each paid tool you keep switched on, we take its public list price for the plan shown and multiply it by the seats your team would need. Some tools are only used by part of a team, so a row may count a share of your team or a fixed number of seats; the row says how many. Prices that depend on sales or usage are shown but not counted.
From that we subtract an estimate for running the open-source stack yourself: $165/month plus $2 per person per month (Two 8 vCPU / 16 GB cloud servers, plus storage per person), and any extra running cost a row lists, such as a GPU. The time it takes to set up and maintain the tools is not included.