Here are some of the best free or very low-cost self-service support portal options for a small team testing customer self-service on a budget, grouped by what they’re best at.

Best overall free options

1. Freshdesk Free

Best for: small teams wanting a simple, polished support portal
Why it’s good:

• Free plan includes a basic helpdesk
• Public knowledge base / self-service portal
• Ticketing and FAQ articles
• Easy to set up and looks professional

Limitations:

• Automation and advanced reporting are limited on free plan
• Best for very small teams or pilots

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2. Zoho Desk Free

Best for: teams already using Zoho or wanting a solid starter portal
Why it’s good:

• Free tier for small teams
• Knowledge base and customer portal
• Ticket management included
• Good balance of features for the price

Limitations:

• Free plan is limited to a small number of agents
• Some customization is restricted

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3. HubSpot Service Hub Starter / Free tools

Best for: teams that want a broader CRM + support setup
Why it’s good:

• Free CRM and support tools
• Shared inbox and ticketing basics
• Good if you want support tied to customer records
• Easy to expand later into marketing/sales

Limitations:

• A full self-service portal experience is more limited on free tools
• Best value comes if you’re already using HubSpot

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Best open-source / self-hosted options

4. osTicket

Best for: teams that want a free, lightweight helpdesk they can host themselves
Why it’s good:

• Open source and free
• Ticketing plus basic knowledge base
• Simple and reliable
• Good if you have technical help available

Limitations:

• UI is more basic than commercial tools
• You’ll need to handle hosting and maintenance

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5. Zammad

Best for: teams wanting a modern open-source support portal
Why it’s good:

• Free/open-source
• Clean interface
• Ticketing, knowledge base, and customer portal features
• Better user experience than many older open-source tools

Limitations:

• Self-hosting required for the free version
• Setup may be heavier than SaaS tools

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Best for quick internal testing

6. Notion + simple public pages

Best for: validating self-service before investing in a full portal
Why it’s good:

• Very cheap/free to start
• Easy to create a searchable FAQ or knowledge base
• Quick to update and test
• Great for early-stage experimentation

Limitations:

• Not a true support portal
• Limited ticketing/self-service workflow
• Best for content validation, not full support operations

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7. Google Sites / GitBook / Docusaurus

Best for: lightweight, low-cost help centers
Why it’s good:

• Free or low-cost hosting options
• Easy to build documentation and FAQs
• Fast to launch
• Can be good for testing whether customers will use self-service content

Limitations:

• Usually lacks integrated ticketing
• More “knowledge base” than “support portal”

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Best if you want chat + self-service

8. Tawk.to

Best for: budget-conscious teams wanting live chat with a help center feel
Why it’s good:

• Free live chat
• Knowledge base/docs functionality
• Can act as a lightweight support layer
• Good for combining self-service and human fallback

Limitations:

• More chat-focused than full portal-focused
• Less structured than dedicated helpdesk platforms

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My shortlist by use case

If you want the easiest free SaaS portal:

• Freshdesk Free
• Zoho Desk Free

If you want open-source and control:

• Zammad
• osTicket

If you just want to test content and demand:

• Notion
• Google Sites
• GitBook

If you want chat plus self-service:

• Tawk.to

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What to look for in a pilot

For a small budget test, prioritize:

• Public knowledge base
• Search functionality
• Ticket deflection metrics
• Easy article editing
• Basic customer portal
• Simple analytics on article views and ticket creation

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Quick recommendation

If you want the best free option with the least friction, start with:

1. Freshdesk Free if you want a polished SaaS portal
2. Zoho Desk Free if you want a more flexible support setup
3. Zammad if you’re okay self-hosting and want open-source

If you want, I can also give you a comparison table of 5–8 tools with columns like free features, portal quality, ease of setup, and best use case.