Open Source Ticketing Systems

A legitimate choice for the right team, and a false economy for everyone else. Here is how to tell which one you are.

The main options

Project	Best for	Watch out for
osTicket	Straightforward ticketing, long track record	Dated interface, PHP stack to maintain
FreeScout	Teams who want a Help Scout-like inbox	Useful features live in paid modules
Zammad	Feature-rich, modern interface	Heavier to run, Ruby and Elasticsearch
GLPI	IT asset management plus ticketing	ITSM-shaped, not customer-support-shaped
UVdesk	Ecommerce-oriented support	Smaller community
Chatwoot	Multi-channel and messaging first	Different model, closer to Intercom than Zendesk

What self-hosting really costs

Nothing on this list is free once it is running. Budget honestly for all of it.

Infrastructure, and enough of it that the queue does not crawl at peak.

Email deliverability. SPF, DKIM, DMARC and a sending reputation. This is the part that bites hardest, because badly configured outbound mail means your replies land in spam and customers write in again.

Upgrades and security patches, forever.

Backups you have tested by restoring, not backups you believe in.

Someone who owns it. Usually the real cost, and usually the person who least wants another system to own.

When open source genuinely wins

Data residency or regulatory constraints that rule out SaaS.

Large agent counts where per-seat pricing becomes the dominant cost.

Deep customisation you cannot express in a hosted product.

You already run infrastructure well and adding one more service is genuinely marginal.

If none of those apply, a paid plan on a hosted helpdesk is almost certainly cheaper once you count your own time.

Duplicates are worse here, not better

Self-hosted helpdesks have the same duplicate problem as commercial ones, with less tooling around it. Detection features that exist in commercial products, thin as they are, generally do not exist at all here.

If you go this route, build measurement in early: count tickets from the same requester within a short window and you will have a duplicate rate before it becomes an argument about staffing.

Frequently asked questions

What is the best open source ticketing system?+

osTicket for straightforward ticketing, Zammad for a modern feature set, FreeScout if you want a shared-inbox feel. All three are real projects with real communities.

Is self-hosting cheaper than SaaS?+

Only at scale or under a policy constraint. For a small team, one day of engineer time a month usually exceeds the SaaS bill.

Can open source handle high volume?+

Yes, with the infrastructure and the person to run it. The software is rarely the limiting factor.

Whatever you run it on

Duplicate tickets are a queue problem, not a vendor problem. Ticket Merger connects to Zendesk and Freshdesk today.

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