There is no outright winner among Helpy, osTicket and Zammad because each treats the shared open-source, self-hosted promise differently once you look past…
Freemium / Open Source · From Free (Community Edition), paid cloud from around $15/seat/month
Best for: Teams that want a fully free, MIT-licensed self-hosted helpdesk but also want Carin, Helpy's AI agent, to autonomously resolve routine tier-one tickets before they reach a human.
Freemium · From Free (open source); Cloud-hosted from $12/agent/month
Best for: IT and support teams that want the most mature, completely free self-hosted ticketing system with no agent limits and don't need built-in AI or social messaging channels.
freemium · From Free (self-hosted, open source); hosted plans from EUR 7 per agent per month
Best for: Support teams with GDPR or EU data residency requirements that need Telegram, Facebook and WhatsApp messaging alongside email in one shared inbox.
At a Glance
Helpy
osTicket
Zammad
Primary category
Customer Support
Customer Support
Customer Support
Rating
Not documented
Not documented
Not documented
Pricing model
Freemium / Open Source
Freemium
freemium
Starting price
Free (Community Edition), paid cloud from around $15/seat/month
Free (open source); Cloud-hosted from $12/agent/month
Free (self-hosted, open source); hosted plans from EUR 7 per agent per month
Free plan
Yes
Yes
Yes
Free trial
Yes
Not documented
Yes
Platforms
Web
Web
Not documented
Team collaboration
Not documented
Not documented
Not documented
AI features
Not documented
Not documented
Yes
Public API
Yes
Yes
Yes
Standout Differences
osTicket is the free, no-limits veteran
osTicket has been in continuous development since 2003, making it one of the longest-running open-source help desks still active, and its self-hosted edition remains completely free with no artificial agent caps.
osTicket
Helpy pairs open source with a modern AI agent
Helpy's Carin is built to autonomously resolve up to 90 percent of tier-one customer questions, layering AI-assisted automation on top of a genuinely free, MIT-licensed open-source core.
Helpy
Zammad leads on native multichannel and EU data residency
Zammad's hosted plans add Telegram, Facebook and WhatsApp channels alongside email and chat, and its cloud edition runs on ISO27001-certified German data centers built for GDPR-friendly data residency.
Zammad
All three offer a genuinely free self-hosted core
None of the three require a license fee to self-host the open-source edition, which sets them apart from most commercial helpdesk platforms that gate core ticketing behind a paid seat.
Helpy, osTicket, Zammad
Cloud pricing structures diverge once you leave the free self-hosted tier
osTicket's cloud plan starts from a flat $12 per agent per month, Zammad's hosted tiers start around EUR 7 per agent per month but add per-call AI usage fees, and Helpy's cloud tiers span roughly $15 to $50 per seat per month depending on features.
Helpy, osTicket, Zammad
Feature-by-Feature
Deployment and Hosting
Feature
Helpy
osTicket
Zammad
Free, self-hosted open-source edition
Available
Available
Available
Managed cloud-hosted plan
Available
Available
Available
AI and Automation
Feature
Helpy
osTicket
Zammad
Built-in AI support agent
Available
Not documented
Limited
Ticket routing rules, triggers or macros
Not documented
Available
Available
Channels and Collaboration
Feature
Helpy
osTicket
Zammad
Customer community forums
Available
Not documented
Not documented
Chat, Telegram, Facebook or WhatsApp channels
Not documented
Unavailable
Available
Compliance and Structure
Feature
Helpy
osTicket
Zammad
GDPR-specific compliance tooling or data residency
Available
Not documented
Available
SLA and business-hours enforcement
Not documented
Available
Available
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Helpy
Community Edition — Free N/A
Cloud (Essential/Basic) — From around $15/seat/month Monthly
Self-Hosted Pro — From $40/seat/month Annual contract
Enterprise — Custom Annual
osTicket
Open Source — Free N/A
Cloud-Hosted — From $12/agent/month Monthly
Enterprise / Virtual Appliance — Custom Annual
Zammad
Community (Self-Hosted) — Free N/A
Starter v2 (Hosted) — EUR 7/agent/month (annual) or EUR 9/month (monthly) monthly or annual
Professional v2 (Hosted) — EUR 16/agent/month (annual) or EUR 18/month (monthly) monthly or annual
Plus v2 (Hosted) — EUR 25/agent/month (annual) or EUR 27/month (monthly) monthly or annual
Self-Hosted Support (Business/Enterprise/Corporation) — From EUR 2,999/year annual
Pros & Cons
Helpy
Pros
Genuinely free, MIT-licensed open-source edition with no artificial feature caps
Flexible deployment across self-hosted and cloud options under one product
Carin AI agent adds modern automation on top of a mature open-source base
GDPR-compliant data deletion and anonymization built in
Free cloud tier for up to three agents with no credit card required
Cons
Self-hosting the open-source edition requires Ruby on Rails and DevOps expertise
Self-hosted commercial pricing requires an annual contract commitment
Smaller community and ecosystem than larger open-source alternatives like Chatwoot
Cloud pricing tiers are not fully transparent without contacting sales
Company scale and public roadmap are less visible than larger helpdesk vendors
osTicket
Pros
Self-hosted core edition is completely free with no per-agent licensing cost
Mature, battle-tested platform with over two decades of continuous development
Large community, documentation base, and plugin ecosystem
Flexible deployment as self-hosted, cloud-hosted, or enterprise virtual appliance
Granular SLA, routing, and department management for structured support teams
Affordable cloud entry price relative to major SaaS help desk competitors
Cons
Self-hosted edition's interface feels dated compared to modern SaaS help desk tools
Cloud-Hosted plan is less customizable than the self-hosted edition
Advanced customization requires the higher-priced Enterprise/Virtual Appliance tier
Self-hosting requires ongoing server maintenance, updates, and security patching
Built-in reporting and analytics are more limited than newer competitors like Zendesk
Zammad
Pros
Free, fully open-source self-hosted option with no license cost
German-hosted cloud plans support GDPR-friendly data residency
Deep customization through the API and custom ticket objects
Multichannel support built in from the entry-level hosted tier
Cons
Self-hosted deployments require your own server management and updates
AI features carry an additional per-call usage fee
Interface is functional but less polished than premium SaaS helpdesks
Channels like WhatsApp and Facebook are reserved for the top hosted tier
Use Cases
Choose Helpy: Teams that want a fully free, MIT-licensed self-hosted helpdesk but also want Carin, Helpy's AI agent, to autonomously resolve routine tier-one tickets before they reach a human.
Choose osTicket: IT and support teams that want the most mature, completely free self-hosted ticketing system with no agent limits and don't need built-in AI or social messaging channels.
Choose Zammad: Support teams with GDPR or EU data residency requirements that need Telegram, Facebook and WhatsApp messaging alongside email in one shared inbox.
Helpy
Self-hosting a fully open-source helpdesk — A technical team deploys the free Community Edition on its own infrastructure for full data control and no licensing fees.
Running an affordable AI-assisted cloud helpdesk — A small support team uses the cloud SaaS plan with Carin to automate tier-one questions without hiring additional agents.
White-labeling a helpdesk for agency clients — An agency uses Helpy's Enterprise plan to resell a fully white-labeled support platform under its own brand to multiple clients.
osTicket
Small business customer support — Small businesses run the free self-hosted edition of osTicket to manage customer support tickets without paying per-agent SaaS fees.
IT help desk ticketing — Internal IT teams use osTicket's routing, SLA, and department management features to track and resolve employee support requests.
Nonprofit and budget-constrained support operations — Nonprofit organizations rely on osTicket's free self-hosted edition to run a professional support desk on a limited budget.
Zammad
GDPR-compliant helpdesk — Run a support desk with data residency requirements met via German-hosted infrastructure.
OTRS migration — Replace legacy ticketing systems like OTRS with a modern, actively developed open-source alternative.
Affordable multichannel support — Consolidate email, chat, and social support channels without high per-agent SaaS pricing.
Frequently Asked Questions
Which of these three can I self-host for free with no agent limit?
All three offer a free, self-hosted open-source edition. osTicket explicitly markets its self-hosted edition as having no artificial agent limits, while Helpy's Community Edition and Zammad's self-hosted edition are also free with no license cost.
Does any of them include a built-in AI agent for deflecting tickets?
Helpy is the most AI-forward, with its Carin agent designed to autonomously resolve up to 90 percent of tier-one questions. Zammad offers optional AI features like language detection and reply suggestions billed per call. osTicket does not document a built-in AI agent.
Which one supports WhatsApp, Telegram or Facebook messaging?
Zammad is the only one of the three with documented support for Telegram, Facebook and WhatsApp channels, though WhatsApp and Facebook are reserved for its top hosted tier.
Which has been around the longest?
osTicket has the longest history, in continuous development since 2003, compared to Helpy and Zammad, which both launched in 2016.
Do any of these require an annual contract just to use the free tier?
No. The free self-hosted editions of all three carry no contract. Annual commitments only apply to specific paid tiers, such as Helpy's self-hosted Pro license or Zammad's self-hosted support contracts.
Are these tools GDPR compliant?
Helpy advertises GDPR-compliant data deletion and anonymization tools, and Zammad's hosted cloud runs on ISO27001-certified German data centers built for GDPR-friendly data residency. GDPR-specific tooling is not documented for osTicket in the available data.