Open source and self-hosted ticketing systems
Open source ticketing systems let you run a help desk on your own servers instead of renting one: Zammad is the most modern self-hosted desk, osTicket the long-standing free option, FreeScout the lightest, and Spiceworks or Freshservice are the answers if the desk is internal IT and you would rather not host anything.
People arrive at this search wanting one of two things: a help desk whose source they can read and host themselves, or a free desk for the internal IT tickets their colleagues keep raising. Both are reasonable, and AcornReply is neither.
AcornReply is closed-source SaaS. There is no self-hosted build, no source to audit, and no internal-IT feature set behind it: no asset tracking, no employee portal, no change management, no Discord integration. It appears nowhere in the table below. What follows is the shortlist for the job you actually came for, with one honest note at the end about the case where a hosted inbox turns out to be what was missing.
What is an open source ticketing system?
An open source ticketing system is help desk software whose source code is published under a license that lets you run, inspect, and modify it, normally installed on a server you control rather than rented from a vendor. The appeal is clear: no per-agent fee, your data on your own infrastructure, and the freedom to change what a vendor would not. The trade is just as real. Someone provisions the server, applies upgrades, keeps database backups and proves they restore, patches security advisories the week they land, and picks up the pager when the desk is down in the middle of a support crisis. That is a staffing cost, not zero cost, and it is the figure to weigh against a subscription rather than the license price of nothing. Several of these projects also sell a hosted edition, which is how you buy the software without buying the operations.
Six options, self-hosted and hosted
Four you can host yourself, two you cannot, because "open source" is often shorthand for "I do not want a per-agent bill" and an honest list answers that reading too.
| Tool | Best for | Pricing model |
|---|---|---|
Zammad The best interface of the open-source set, with email, chat and social channels. Needs Elasticsearch, so budget the memory and the operations. | Teams wanting the most modern self-hosted desk | Free self-hosted, or paid cloud hosting |
osTicket Dated interface, two decades of production use. Runs on plain PHP hosting, which makes it the least demanding to install. | A simple ticket queue you can stand up on ordinary hosting | Free self-hosted, plus a paid cloud edition |
FreeScout A Help Scout style inbox that is light on resources. Much of what you will want (knowledge base, workflows, reporting) is a paid module. | Teams wanting a self-hosted shared inbox rather than a portal | Free core, paid modules |
Jitbit Polished and properly supported, and closed-source despite the self-hosted option. Worth knowing before it lands on an open-source shortlist. | Teams that want self-hosting without the maintenance culture | One-off license for self-hosted, or cloud subscription |
Spiceworks Hosted, genuinely free, with device inventory internal IT actually uses. Ads are the price, and reporting hits a ceiling sooner than in a paid tool. | Internal IT desks that want something free today | Free, ad-supported |
Freshservice Not open source at all: asset management, change management and a service catalog, hosted for you. The honest buy-instead-of-host option. | MSPs and internal IT teams who would rather buy than host | Per agent, tiered |
When AcornReply is the wrong tool, and when it is not
If you are running an internal IT desk, managing client infrastructure as an MSP, or self-hosting because policy or a customer contract requires the data to sit on your own servers, buy one of the tools above and close this tab with our blessing. AcornReply cannot be self-hosted, is not open source, tracks no assets, and has no employee portal or change management. The one case worth a second look is this: some teams reach this search having decided that a ticketing system is needed and a free one is required, when what they really have is customer email arriving faster than a small team can answer it. If that describes you, a hosted shared inbox is a different, and much smaller, purchase.
Frequently asked questions
Is open source ticketing really free?
The software is. Running it is not. Budget for a server, upgrades, database backups you have actually tested restoring, security patches applied promptly, and the person who does all of that. For a team with an existing ops function the cost is marginal. For a five-person business with no server admin it usually exceeds a subscription, paid in evenings instead of invoices.
What is the best free ticketing system for internal IT?
Spiceworks if you want it hosted, free today, and can live with advertising, since it bundles the device inventory internal IT leans on. osTicket if you would rather run it yourself and keep everything in house. Zammad if you want a modern interface and have the capacity to operate Elasticsearch. Freshservice is the paid answer once asset and change management start to matter.
Can I use a Discord ticket bot as a help desk?
For a community, yes, and plenty run well on one: a bot opens a private thread, a moderator answers, the thread closes. For customer support it falls down where it counts. There is no durable record outside Discord, no email trail the customer can find months later, no status or assignment you can report on, and anyone who does not use Discord cannot reach you at all. Run it alongside a support address, not instead of one.
Do MSPs use the same tools as internal IT?
They overlap, and they diverge on multi-tenancy. An MSP has to keep several clients separated, bill against time, and often pair the desk with remote monitoring and management, which is why MSP-specific platforms exist. Internal IT needs one tenant, an asset inventory, and change control. Freshservice and Zammad get used on both sides, while a single-tenant free desk like osTicket is a poor fit for an MSP past a couple of clients.