Best Help Desk Software Open Source

1. FreeScout: best for an email-first shared inbox

FreeScout suits a small support team that handles most customer conversations by email and wants to run its help desk itself. Its email-focused shared-inbox approach can be a practical fit when the daily job is keeping email threads together and letting teammates work from one place. FreeScout is described as lightweight and simple to deploy. Before adopting it, check the current project and release history.

The main trade-off is scope. The available descriptions characterize FreeScout as email-focused, with limited chat support. They do not establish the full current feature set, license terms, or the cost and availability of individual paid modules. Check those details against the project’s current documentation before you decide whether it meets your requirements. Also account for the work of operating a self-hosted service: someone on the team must own installation, updates, backups, and troubleshooting.

2. Chatwoot: best for a self-hosted shared inbox with live chat

Chatwoot is a candidate for teams that want customer conversations brought together in a self-hosted tool, especially when live chat is part of support. Its described features include a shared inbox, live chat, customizable workflows, and integrations with Slack and Calendly. Those details make it worth evaluating if support work moves between chat and other customer communication channels.

Chatwoot is described as having a free, open-source self-hosted community edition and paid plans for commercial features. The precise boundaries of those editions matter: verify the current license, what is available in the edition you intend to run, and any separate costs before planning around a feature. Self-hosting also means taking responsibility for server operations and upgrades. The feature overview is not a current official product specification, so confirm the implementation and maintenance requirements before you commit.

3. Zammad: best for shared mailboxes and ticket collaboration

Zammad may suit teams that want a self-hosted ticket system with several mailboxes and collaboration features inside ticket work. Its described core capabilities include unlimited mailboxes and users, collision detection, internal notes, and simple automation. Collision detection is a concrete workflow differentiator: it helps agents see when a colleague is looking at the same ticket, while internal notes let teammates discuss a case without writing to the customer.

The described deployment choices include a free self-hosted community edition, managed cloud hosting, and enterprise support contracts. These are different operating choices, not interchangeable costs: self-hosting leaves server and upgrade work with your team, while managed hosting changes who runs the service. Confirm the current license, edition limits, and terms for support before choosing. Do not assume a feature mentioned for the core product is included in every hosted plan or support arrangement.

4. osTicket: best for a technical team that wants self-hosted ticketing

osTicket is a straightforward candidate for a team with server capacity that wants a self-hosted ticketing system. The supplied overview describes web and email ticketing and a free self-hosted option; it also notes paid cloud versions. That makes it relevant when the immediate requirement is capturing requests as tickets, rather than adopting a managed service.

Its trade-off is the operational responsibility that comes with self-hosting. Your team needs a person who can install and maintain the service, keep backups, and troubleshoot problems. The available description presents osTicket as a traditional ticketing system, but does not establish its current license terms, edition details, maintenance activity, or full channel and reporting feature set. Check those points against current project documentation before treating it as a fit for customer-facing support. In particular, map how your customers contact you to the channels the version you plan to run actually supports.

5. eesel: best for teams exploring an AI layer alongside support work

eesel is a different kind of option in this list: the available descriptions discuss an AI layer connected to helpdesk and knowledge sources, rather than establishing it as an open-source help desk. The described workflow emphasizes starting with drafts as internal notes so a human can review replies before they go to customers. That is relevant to support leads concerned about incorrect answers, because review can be part of the workflow rather than leaving every draft to go out automatically.

Do not treat that as proof that eesel is open source, or as a product-by-product comparison of its licensing and costs. Check its current terms and pricing before evaluating it. Check its current terms and what integrations and knowledge sources it supports before evaluating it. If your requirement is specifically software whose source you can run and modify for your company’s own use, verify the license first; AI capability and open-source licensing are separate questions.

How to choose by team size, channels, and budget

Start with the customer-support job, not the number of features in a product description. For a broader ticketing comparison, see support ticket system options. Write down the requests your team handles repeatedly, where they arrive, who needs to respond, and which cases need judgment. A small team with mostly email may need a shared inbox and dependable ticket ownership before it needs a complex workflow. A team handling live conversations should check whether the tool supports the channels customers actually use.

Next, decide who will operate the software. With self-hosting, the license is only one part of the cost. Someone must take responsibility for installation, server security, backups, upgrades, and troubleshooting. The time and technical capacity needed for that work matter even when the software itself has a free edition. Managed hosting shifts some server work to a provider, but compare the actual plan, included features, and price before treating it as a lower-cost choice.

Then check the details that can change an apparently good fit: current license terms, the boundary between community and paid editions, integrations, reporting, automation, and knowledge-base features. The available descriptions of FreeScout, Chatwoot, Zammad, and osTicket do not amount to a complete current feature matrix. Do not assume a named capability belongs to every edition, and do not adopt an open-source label without verifying the license for the version you plan to use. Consider AI workflow separately from help desk licensing, and verify the license for any tool before adopting it.

Finally, decide how the team will handle answers that require a person. If you are evaluating AI, ask what knowledge it retrieves, whether answers are checked against that knowledge, whether confident answers cite their sources, and what happens when it is unsure. momo is source available under the PolyForm Internal Use License 1.0.0, not open source or open-core. A company can run and modify its code for its own use, but cannot resell it, host it for others, or redistribute it. The hosted service has a flat EUR plan fee, an included conversation allowance, and a human inbox for conversations that need the team.