Open Source CRM Software
A CRM earns its value slowly, one logged call and closed deal at a time, until the database holds years of context that no replacement can recreate. That accumulation is exactly what makes per-seat lock-in expensive: the more the system is worth to you, the more leverage a vendor's pricing and hosting hold over the record your revenue depends on. Open source shifts that balance. When the customer history lives in a database you run, in schemas you can read and export, the record of who your business is stays yours, and growing the team that relies on it never turns into a bigger monthly bill for access to your own data.
Odoo CRM
Open source CRM for managing prospects and customers inside Odoo's web based business apps
Twenty
Open-source CRM for technical teams, with objects, views, workflows, agents, and Docker Compose self-hosting
Chatwoot
Open-source customer support platform for live chat, email, and omnichannel inboxes
Huly
Open-source team platform combining project management, chat, CRM, HRM, and applicant tracking
Monica
Open source personal CRM for documenting relationships, reminders, and shared history
Krayin CRM
Open source Laravel CRM for lead, customer, and sales management with modular customization
IDURAR
Self-hosted ERP and CRM for invoicing, quotes, accounting, inventory, and HR
Dolibarr
Web-based ERP and CRM for managing quotes, invoices, orders, stocks, accounting, and more
SuiteCRM
Open source CRM for businesses with self-hosted and SaaS deployment options
Our picks
The right fit depends on whether you want a focused sales tool, a niche match, or a CRM you reshape in code.
Best for engineering-led teams: Twenty Twenty treats the CRM as software you build and version like the rest of your stack: objects, views, and workflows you extend in code and scaffold through a CLI. It self-hosts with Docker Compose or runs as a hosted workspace. Reach for it when a fixed sales database would fight your process.
Fullest traditional sales CRM: SuiteCRM SuiteCRM covers the classic sales surface in depth - accounts, contacts, leads, opportunities, cases, contracts, quotes, and a workflow engine - with multi-currency and multi-language support. It runs on a standard Apache, PHP, and MySQL stack, hosted internally or with a managed provider. It suits teams that want a complete CRM out of the box.
Lightweight, extensible CRM: EspoCRM EspoCRM pairs a fast single-page interface with a PHP REST API and lets you add custom entities, fields, and relationships without heavy development. It manages leads, contacts, opportunities, campaigns, and cases, and self-hosts on common PHP and MySQL. Choose it for a lean CRM that still bends to your data model.
Personal relationship manager: Monica Monica is a CRM for your personal life rather than a sales team, tracking how the people you care about relate to each other with reminders, notes, activities, and automatic birthday alerts. It self-hosts with a Docker image, so the record stays private. Pick it to stay in touch deliberately, not to manage a pipeline.
Matching an open source CRM to how you sell
The fastest way to pick the wrong open source CRM is to compare feature checklists before deciding whether you even want a dedicated CRM or a suite that happens to include one. Twenty, SuiteCRM, EspoCRM, and Krayin CRM are built around sales objects - leads, contacts, accounts, opportunities - and stay focused on the pipeline. Odoo CRM, Dolibarr, and IDURAR put that pipeline inside a wider ERP, which is the right call only if you also want invoicing, inventory, or accounting in the same system. Choosing a suite for its CRM alone means running a lot of software you will never open.
Who you sell to narrows the field further. CiviCRM is shaped for nonprofits and advocacy groups that track constituents, contributions, and memberships rather than deals, and ChurchCRM does the same for congregations. Monica is a personal relationship manager for friends and family, with no sales pipeline at all. If your needs are unusual or likely to change, the developer-oriented options matter: Twenty and Corteza let you model custom objects and workflows, and EspoCRM exposes a REST API for wiring the CRM into the rest of your stack.
Whatever you choose, test the two things that decide daily use. Email and calendar capture create the activity history reps expect, so confirm how mail is logged and whether events sync both ways before rollout. Then test the exit early: export accounts, contacts, activities, custom fields, and their relationships into a clean install and see what survives, because a pipeline you cannot move is one you do not really own.
Related categories
Frequently asked questions
Do I need a dedicated CRM or a suite with a CRM module?+
It depends on what else you want to run. A dedicated CRM like SuiteCRM or EspoCRM stays focused on contacts, pipeline, and support cases, which keeps it lighter to operate. A suite such as Odoo, Dolibarr, or IDURAR bundles the CRM with invoicing, inventory, and accounting, so it pays off only if you plan to use those modules too. Running a full ERP just for its contact list is usually more system than the job needs.
Is there an open source CRM for nonprofits or membership organizations?+
Yes, and the fit is better than forcing a sales CRM to track donors. CiviCRM is designed around constituents, contributions, memberships, and events, and it can run standalone or inside Drupal, WordPress, or Joomla. ChurchCRM covers the same ground for congregations, with membership records, groups, attendance, and donation tracking. Both keep the data on your own server rather than a fundraising vendor's platform.
What is a personal CRM, and how is it different from a sales CRM?+
A personal CRM helps you keep up with people rather than close deals. Monica is built for this: it records how contacts relate to each other, sends reminders including birthdays, and stores notes, activities, and a diary, with no pipeline or lead scoring. A sales CRM instead assumes opportunities, stages, and revenue reporting. If you just want to be a more thoughtful friend or networker, the personal tool is far less to manage.
How do open source CRMs handle email and calendar sync?+
Support varies, so test it with real mailboxes. Most systems can log inbound and outbound email against a contact, and several offer two-way calendar sync, but the depth differs between projects. EspoCRM and SuiteCRM include email handling in the core, while suite-based options tie it to their wider platform. Confirm how threads attach to records, how duplicates are avoided, and whether errors are visible to an administrator before you rely on it.
Which of these can developers customize with code?+
Twenty is built for exactly this, giving technical teams objects, views, and workflows they can extend with custom logic and scaffold through a CLI. Corteza is a low-code platform that ships a CRM you reshape through visual data modeling and a scripting engine. EspoCRM sits in between, with custom entities and fields plus a REST API for integration. If your process is unusual, these adapt more cleanly than a fixed sales database.
Will sales reps actually use an open source CRM?+
Adoption depends on daily friction far more than the license. Reps stay in a CRM that offers fast search, quick activity logging, useful reminders, and a clean view of their own pipeline, and they abandon one that demands too many fields per call or has a weak mobile experience. Pilot with a few real reps and their real accounts before designing the full workflow, since their habits will expose problems a demo never does.
How do I move from spreadsheets or another CRM without losing history?+
Map your fields first, then import in dependency order: accounts, then contacts, then opportunities, activities, notes, and files. Expect cleanup around duplicate companies, stale pipeline stages, record owners, and invalid email addresses. Run a test import and let users inspect real records before the cutover, and prefer tools with API access or structured exports so the timeline of how each deal developed survives the move, not just the current field values.