If Zendesk’s per-agent pricing and AI add-ons are pushing your bill up, an open-source helpdesk can replace most of what small and mid-size teams use, with no licence fee.
The shortlist
Zammad: the closest overall match
Ticketing across email, chat, phone and social, with a knowledge base, SLAs, reporting and AI features where you choose the AI provider. Self-host free, or use hosted plans from about €7 per agent per month.
osTicket: simple and proven
Long-running, lightweight email ticketing. Fewer modern features, but easy to understand.
FreeScout: lightweight shared inbox
Help Scout-style inbox; add only the paid modules you need.
Chatwoot: for chat-heavy teams
Live chat, email, WhatsApp, Instagram and more in one inbox. Community Edition free to self-host.
Helpin: support plus CRM and projects
Shared inbox with an AI agent, knowledge base, CRM and ticket-to-task workflows in one workspace. Free self-hosted under AGPL-3.0, or Helpin Cloud. See the Helpin review.
Zendesk feature → open-source equivalent
| Zendesk feature | Where to find it |
|---|---|
| Ticketing + SLAs | Zammad, osTicket |
| Macros | Saved replies in all of them (FreeScout via module) |
| Help Center | Zammad, Helpin, FreeScout (module) |
| Messaging / live chat | Chatwoot, Zammad |
| AI agent | Helpin, Chatwoot, Zammad |
Is it right for you?
Yes, if you have someone comfortable running a server and you want to cut per-seat costs or keep data in-house. No, if you need enterprise reporting and a large marketplace out of the box; compare hosted Zendesk alternatives instead.
Munaza
Founder & Editor, SupportPricing
Munaza runs a digital marketing agency that manages social media and SEO for client brands across multiple platforms. Her work puts her inside SaaS tools every day: she sets up help centers, writes product content and compares software for clients before they buy. She started SupportPricing because customer service software pricing kept changing faster than anyone could track. Every price on this site comes from the vendor’s own pricing page and carries the date she checked it.