I've implemented Odoo Community for a few small orgs and it's solid for nonprofits if you have the technical resources to maintain it. The main gotchas are: it

I've implemented Odoo Community for a few small orgs and it's solid for nonprofits if you have the technical resources to maintain it. The main gotchas are: it requires significant PostgreSQL knowledge for customizations, the upgrade path between major versions can be painful (especially with custom modules), and while the community edition is free, you'll likely need paid modules for advanced CRM features like email marketing automation. Since you mentioned migration - the data import process is where most projects get stuck. Odoo's import tools are decent but you'll probably need custom Python scripts for complex data transformations from your current CRM. One thing I learned while building automation tools is that many small nonprofits actually need something simpler than a full CRM - often they just need better task management and follow-up tracking from their existing email communications. I've been beta testing ungrind.ai which handles that specific piece (auto-creates tasks from emails/meetings), though it's designed more for individual consultants than organizations. What's your current CRM and roughly how many contacts/complexity are you migrating? That would help determine if Odoo Community's data model limitations might be an issue.