For a marketing team on a tight budget, the best free microsite builders are usually the ones that give you:

• a clean landing page / microsite layout
• easy editing without code
• mobile-friendly templates
• basic analytics or tracking integration
• the ability to publish quickly on a custom subdomain or free branded URL

Here are the strongest free options:

1. Carrd

Best for: simple, high-converting one-page microsites
Why it stands out:

• Very easy to use
• Clean, modern templates
• Great for campaign landing pages, waitlists, event pages, and lead capture
• Lightweight and fast

Free plan limits:

• Usually limited to 3 sites
• Carrd branding
• Some advanced features require Pro

Good for: quick campaign tests where you need speed and polish.

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2. Google Sites

Best for: internal microsites, simple informational campaign pages
Why it stands out:

• Completely free with a Google account
• Easy collaboration for teams
• Simple drag-and-drop editing
• Works well if your team already uses Google Workspace

Free plan limits:

• Basic design flexibility
• Less polished than dedicated landing page tools
• Limited marketing features and integrations

Good for: low-budget, low-complexity campaign pages.

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3. Wix Free Plan

Best for: more design flexibility
Why it stands out:

• Large template library
• Visual editor
• Can build a more branded microsite than some simpler tools

Free plan limits:

• Wix ads on the site
• Wix-branded subdomain
• Some features and apps require paid plans

Good for: marketing teams that want more visual control without coding.

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4. Webflow Free Plan

Best for: design-focused teams with some web experience
Why it stands out:

• Very powerful design control
• Better for premium-looking microsites
• Good for custom layouts and animations

Free plan limits:

• Hosted on Webflow subdomain
• Limited projects and CMS features
• Slight learning curve

Good for: teams with design talent who want a more custom look.

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5. Notion + Super / Potion alternatives

Best for: ultra-lightweight campaign pages, content-driven microsites
Why it stands out:

• Notion is free and easy to edit
• Fast to build
• Good for simple campaign hubs, FAQ pages, and content libraries

Limitations:

• Not ideal for polished marketing pages on its own
• External tools are often needed for better branding/publishing
• Free setup is often more of a workaround than a true microsite builder

Good for: quick experimental pages or campaign resource hubs.

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6. Framer Free Plan

Best for: modern, design-heavy landing pages
Why it stands out:

• Very sleek templates
• Good for interactive, modern campaign pages
• Easier than coding from scratch

Free plan limits:

• Framer branding
• Free subdomain
• Advanced publishing features are paid

Good for: campaign tests where visual appeal matters.

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7. WordPress.com Free Plan

Best for: content-heavy microsites or small campaign blogs
Why it stands out:

• Familiar platform
• Good if your campaign includes articles, updates, or SEO content
• Many themes available

Free plan limits:

• WordPress branding
• Limited customization
• Some plugins and advanced marketing tools require payment

Good for: content campaigns with a longer lifecycle.

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Best overall picks by use case

If you want the easiest and most polished:

Carrd

If you want completely free and simple collaboration:

Google Sites

If you want the most design flexibility on a free plan:

Wix

If you want a premium look and have some design skill:

Webflow or Framer

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What to look for in a free microsite builder

For campaign testing, prioritize:

• Speed to publish
• Mobile responsiveness
• Form/lead capture integration
• Analytics support like Google Analytics, Meta Pixel, or UTM tracking
• Easy A/B testing if possible
• Custom domain support if you later decide to upgrade

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Practical recommendation

If your team is testing a campaign with limited budget, I’d usually suggest:

1. Carrd for the best balance of speed, polish, and ease
2. Google Sites if you need fully free and collaborative
3. Wix if branding/design matters more than simplicity

If you want, I can also give you:

• a comparison table
• the best builder for lead generation
• or a recommended stack for microsite + analytics + form capture on a near-zero budget