#1★ TOP PICK
EspoCRM
A complete CRM that a small team can run without a specialist.
90
OPEN SOURCEAGPL-3.0 (core; some extensions are commercial)SELF-HOSTLOCAL-FIRST
EspoCRM covers what most companies actually use a CRM for: accounts, contacts, leads, opportunities, activities, email integration, reporting and a workflow engine, with an entity manager that lets you add custom fields and objects through the interface rather than through code. AGPL-3.0, PHP and MySQL, installs on modest hardware. Around 3.2k stars — a smaller number than the flashier entries here, and a slightly misleading one, because this is a mature product with a long deployment history rather than a new arrival.
Strengths
- +Covers the CRM job most companies actually have, completely
- +Customisable through the UI — no developer needed for fields and objects
- +Light PHP/MySQL stack that runs on a small VPS
- +Mature and stable, with years of production use
Trade-offs
- −Interface is functional rather than beautiful
- −Some advanced extensions are commercial add-ons
- −Nothing resembling AppExchange
- −No CPQ or complex territory management
Free and open source to self-host. Some advanced extensions are paid. #2
SuiteCRM
The SugarCRM fork — enterprise features, no licence, no vendor.
91
OPEN SOURCEAGPL-3.0SELF-HOSTLOCAL-FIRST
SuiteCRM is the community fork of SugarCRM, created when Sugar closed its open edition, and it has been maintained independently ever since. That history is the point: it is another product on this site that outlived its parent's commercial decision. AGPL-3.0, with workflow automation, quotes, invoices, contracts and reporting included rather than sold — the enterprise feature set without the enterprise licence. It is the most complete open CRM by capability and the most dated by appearance, and which of those matters more is genuinely a question about your team.
Strengths
- +Most complete open CRM feature set — workflow, quotes, contracts, reporting
- +Already survived its parent closing the source, which is this site's whole thesis
- +AGPL-3.0 with commercial support available
- +Large existing deployment base and available expertise
Trade-offs
- −Interface is the most dated on this page
- −Heavier to run than EspoCRM
- −Development pace is steady rather than fast
- −Customisation follows SugarCRM conventions that feel old
Free and open source. Commercial support available from SalesAgility. #3
Odoo
CRM as one module of a full business suite.
87
OPEN SOURCELGPL-3.0 (Community Edition; Enterprise is commercial)SELF-HOSTLOCAL-FIRST
Odoo is not primarily a CRM — it is an integrated business suite where CRM sits alongside accounting, inventory, manufacturing, HR and e-commerce, all sharing one database. For a company that would otherwise buy four systems and wire them together, that integration is the entire proposition and it is a strong one. The Community Edition is LGPL-3.0 and genuinely capable; Enterprise adds modules and support for a per-user fee. Around 53k stars. The caveat is scope: adopting Odoo for CRM alone means running a great deal of software you are not using.
Strengths
- +CRM, accounting, inventory and more sharing one database
- +LGPL-3.0 Community Edition is genuinely usable, not a demo
- +Enormous module ecosystem and a large partner network
- +Replaces several systems rather than one
Trade-offs
- −Substantial to deploy and operate if you only want CRM
- −The Community/Enterprise line moves and is worth watching
- −Customisation generally needs Odoo-specific expertise
- −Upgrades between major versions are real projects
Community Edition free and self-hostable. Enterprise is per user per month. #4
Twenty
The modern one — built to feel like software from this decade.
86
OPEN SOURCEAGPL-3.0, with `@license Enterprise` file carve-outsSELF-HOSTLOCAL-FIRST
Twenty is an open-source CRM built with the design sensibility of a modern product: keyboard-first navigation, a clean data model, custom objects, and an interface that does not feel like enterprise software from 2012. Around 54k stars, which is the most of any CRM here by a wide margin and reflects genuine developer enthusiasm. The licence is mostly AGPL-3.0, with specific files marked `@license Enterprise` under a commercial licence — so it is AGPL-with-carve-outs. It is the youngest option, and the caveat is exactly that: excellent trajectory, short track record.
Strengths
- +By far the best interface of any open CRM
- +Custom objects and fields without touching code
- +Enormous community momentum for a young project
- +Keyboard-first workflow that salespeople genuinely like
Trade-offs
- −Youngest here — shortest production track record
- −Enterprise-marked files are carved out of the AGPL
- −Feature set still thinner than EspoCRM's
- −Fewer integrations than any established option
Free and self-hostable. Twenty Cloud is a paid hosted option. #5
HubSpot CRM
Free for unlimited users — the honest hosted answer for small teams.
30
SOURCE-AVAILABLEProprietary (hosted service; free core tier)
HubSpot's core CRM is free for unlimited users with unlimited contacts, and for a small sales team that is frequently the right answer rather than a compromise. Contacts, deals, pipeline, email tracking and meeting scheduling all work without payment. Listed here because refusing to name it would be dishonest: a five-person company choosing between a $105,000 Salesforce contract and self-hosting a server very often wants neither. The catch is the upgrade path — Marketing and Sales Hub pricing escalates steeply, and the free CRM is designed to make those adjacent products feel necessary.
Strengths
- +Genuinely free for unlimited users on the core CRM
- +Nothing to host, patch or back up
- +Excellent onboarding — a small team is productive in an afternoon
- +Large integration marketplace
Trade-offs
- −Proprietary and hosted; your customer data lives with the vendor
- −The free tier is a funnel — adjacent Hubs escalate sharply in price
- −Export is possible but the surrounding automation does not travel
- −No self-host option at any price
Core CRM free for unlimited users. Sales, Marketing and Service Hubs are paid and escalate steeply.