Twenty vs EspoCRM vs Odoo: the open-source CRM call for a startup (2026)

Quick answer (July 2026): Twenty, EspoCRM, and Odoo are all open-source CRMs, but they are not the same kind of tool. Pick Twenty if you want a modern, TypeScript-native CRM you can self-host and extend as code (about 53k GitHub stars, AGPL-3.0, cloud from $9 per user per month). Pick EspoCRM if you want the lightest, cheapest self-host, the kind that runs on a $5 VPS and installs in an afternoon (PHP, AGPL-3.0). Pick Odoo if you need CRM bundled with accounting, inventory, and the rest of an ERP (Python, LGPL-3.0 Community), and note its One App Free tier makes CRM-only genuinely free on Odoo Online.

Three CRMs, three completely different bets

Every few weeks someone in the gallery asks the same thing: what is the best open-source CRM to self-host for a small team in 2026? Most roundups answer with a list of eight tools and a feature grid. That hides the one decision that actually matters. The three names you keep seeing, Twenty, EspoCRM, and Odoo, are not competing for the same job.

Twenty is a greenfield CRM designed for people who will treat their CRM as code. EspoCRM is a lightweight PHP application you can install and forget. Odoo is a full business suite where CRM is one module out of hundreds. Choosing between them is really a choice about what you are buying into, and what language your team can actually maintain at 2am.

Here is the ownership lens we use on everything in this gallery: are you owning the tool, or renting it? All three can be self-hosted for free, but the weight of that ownership is wildly different.

What each one is built from (2026)

Twenty is a TypeScript project: a React front end talking to a NestJS back end over GraphQL, backed by Postgres. Its own tagline in 2026 is "the open alternative to Salesforce, designed for AI." It has grown to roughly 53k stars and ships commits daily, which tells you it is the fast-moving, modern option.

EspoCRM is a classic PHP and MySQL application, around 3.1k stars, quietly maintained for years. It is not trying to be trendy. It is trying to install on any cheap LAMP box in a few minutes and stay out of your way.

Odoo is a Python platform, roughly 53k stars, and it is not really a CRM. It is an ERP: accounting, inventory, HR, e-commerce, and a CRM module that happens to be very good. If you install Odoo just for CRM, you are carrying a lot of platform you are not using yet.

The self-host cost, done honestly

License cost is zero for all three. The real bill is the server plus your time. For a three-person sales team self-hosting in 2026:

• EspoCRM is the lightest. PHP plus MySQL is happy on a $5 to $10 per month VPS, and the install is famously quick. The community consensus (see the sources below) is that it is the fastest to stand up.
• Twenty needs Node, Postgres, and Redis, plus a background worker, usually via Docker Compose. Budget roughly $12 to $24 per month of VPS and a bit more setup patience.
• Odoo Community is the heaviest to run. The Python framework plus Postgres wants more memory; a realistic self-host lands around $20 to $40 per month of infrastructure.

If you would rather rent than run servers, the managed picture flips in interesting ways. Twenty's cloud starts at $9 per user per month (Pro) with no free-forever tier, only a 30-day trial. EspoCRM's cloud Basic plan is EUR 12.90 per user per month with a three-user minimum. And here is the fact most listicles bury: Odoo's One App Free plan gives you one Odoo app, CRM counts, with unlimited users at EUR 0 on Odoo Online. If you truly only need CRM and nothing else, Odoo is the cheapest managed option on this page.

Stack and license at a glance

The license nuance that actually bites

"Open source" is doing a lot of hiding in that word. The obligations are not equal.

• Twenty is AGPL-3.0 for the core, with a separate commercial license covering files marked as enterprise (its LICENSE file spells this out). AGPL is network copyleft: if you fork Twenty and offer the modified version as a hosted service, you owe your users the source.
• EspoCRM is also AGPL-3.0, so the same network-copyleft clause applies. Fine for internal use, something to read carefully if you plan to resell a fork as SaaS.
• Odoo Community is LGPL-3.0, which is friendlier for building proprietary modules that link against it. The catch is on the other side: the features many businesses actually want (deeper accounting, Studio, more apps) live in Odoo Enterprise, which is a separate paid, proprietary edition. Community is deliberately the on-ramp.

Where each one loses

We do not ship a comparison without the honest downside on every option.

• Twenty is the youngest of the three. You will feel gaps around mature sales operations, and the self-host stack (Node plus Postgres plus Redis plus a worker) is more moving parts than a PHP app. The AGPL-plus-enterprise-carve-out is worth a lawyer glance if you plan to commercialize.
• EspoCRM has the smallest community here, its UI feels more traditional than Twenty's, PHP may not match a JS or TS team, and the cloud plans carry per-user pricing with a three-user floor.
• Odoo is an ERP wearing a CRM hat. Community is intentionally limited to push you toward paid Enterprise, it is the heaviest to self-host, and it is overkill if all you ever want is a pipeline and some contacts.

Which one should you actually pick

• You are a TypeScript shop that wants a modern CRM you can own and extend as code, with an AI-forward roadmap: pick Twenty. It is also the one we reviewed on its own in our standalone Twenty CRM review.
• You want the cheapest, lightest self-host that a non-developer admin can run on a $5 box and set up in an afternoon: pick EspoCRM.
• You need CRM plus accounting plus inventory in one system, and you can live with Community limits or pay for Enterprise: pick Odoo. And if you only need CRM, its One App Free tier is the cheapest managed start at EUR 0.

The community math agrees. In a June 2026 r/CRM thread comparing Twenty, Odoo, and other open-source CRMs, the top take was blunt: "if self-hosting and modern UI are the two non-negotiables, Twenty is the cleaner bet, but you'll feel the gaps around mature sales ops."

Picking your CRM is one square on a bigger board. If you are still assembling the rest of the stack, our open-source starter scorecard tracks the auth, database, billing, and backend building blocks the same way, on license, cost, and lock-in.