5 Free & Open Source Alternatives to HubSpot (2026)

Compare 5 free and open-source alternatives to HubSpot: Listmonk, Matomo, and Mautic (+2 more). Pros, cons, pricing, and screenshots tested 2026.

HubSpot

Freemium ★ ★ ★ ★ ★ 4.0

An all-in-one CRM platform offering free CRM, marketing automation, sales pipeline management, and operations tools for businesses.

Freemium
5 free options
Marketing Tools
4 / 5
Why people look for alternatives HubSpot has a free tier with limitations. Many users seek fully free or open-source alternatives that offer the same capabilities without paywalled features or usage caps.
HubSpot CRM Visit HubSpot →

Quick Comparison

Tool Pricing Best for Rating
Listmonk
Free & Open Source Technical users needing self-hosted, open-source email marketing ★ ★ ★ ★ ★ 4.5
Matomo
Freemium (Open Source) Data-conscious organizations needing private, open-source analytics ★ ★ ★ ★ ★ 4.5
Mautic
Freemium (Open Source) Technical teams needing powerful, customizable marketing automation. ★ ★ ★ ★ ★ 4.5
Odoo
Freemium (Open Source) Businesses looking for an integrated, scalable ERP solution with open-source flexibility. ★ ★ ★ ★ ★ 4.5
Mailtrain
Free & Open Source Self-hosting email marketing for full data control. ★ ★ ★ ★ ★ 3.5

Detailed Reviews

Listmonk

Listmonk is a free, open-source, self-hosted newsletter and mailing list manager. It's built for efficiency, allowing users to manage millions of subscribers and send transactional emails.

★ ★ ★ ★ ★ 4.5
Free & Open Source Best for: Technical users needing self-hosted, open-source email marketing

Free (self-hosted); managed hosting available from third parties (e.g., from $14/month).

1 screenshot — click to enlarge

Listmonk Screenshot 1

✓ Pros

  • Free and open-source
  • Self-hosted, offering full control over data and infrastructure
  • Efficient, handles millions of subscribers
  • Fast bulk importer (10k records/sec)
  • Advanced segmentation using SQL expressions
  • Supports transactional emails and campaigns
  • GDPR compliant
  • Features like email verification, warm-up, inbox rotation, adaptive sending

✕ Cons

  • Moderately technical to set up and maintain (requires Docker or binary installation, PostgreSQL, SMTP config)
  • Limited automation features compared to full marketing suites
  • Basic reporting capabilities
  • Interface is functional but not as polished as mainstream SaaS tools
  • Users are responsible for all infrastructure, updates, backups, and deliverability

Matomo

Matomo is a free and open-source web analytics platform that helps users track, analyze, and optimize their website's performance with full data ownership and privacy.

★ ★ ★ ★ ★ 4.5
Freemium (Open Source) Best for: Data-conscious organizations needing private, open-source analytics

Free plan for Matomo Cloud (up to 500 page views/day). Matomo On-premise is free to download; advanced features and support incur additional costs.

3 screenshots — click to enlarge

Matomo analytics Screenshot 1
Matomo Screenshot 2

✓ Pros

  • Full data ownership and control with self-hosted options
  • Integrated GDPR Manager for robust privacy compliance
  • No data sampling provides precise and accurate reports
  • Serious open-source alternative to proprietary analytics solutions

✕ Cons

  • Lacks AI-powered insights for automated data interpretation
  • On-premise deployment requires technical expertise for setup
  • Advanced features like heatmaps and A/B testing incur extra costs
  • Higher usage tiers can lead to significant pricing increases

Mautic

Open-source marketing automation platform providing email campaigns, lead scoring, multi-channel automation, and landing pages. Offers a powerful, flexible, and data-driven approach for customer engagement.

★ ★ ★ ★ ★ 4.5
Freemium (Open Source) Best for: Technical teams needing powerful, customizable marketing automation.

Free for self-hosted version; managed cloud hosting plans available from €247.50/mo.

3 screenshots — click to enlarge

Mautic Screenshot 1
Maut Screenshot 2

✓ Pros

  • Cost-effective alternative to expensive cloud-based services
  • Feature-rich, some features not available in cloud-based services
  • Owns your data and allows running campaigns on your terms (self-hosted)
  • Integrates well with commercial and open-source CRMs
  • Powerful marketing automation with a user-friendly visual builder
  • Full feature set comparable to commercial tools
  • Active community

✕ Cons

  • Complex setup
  • Ongoing maintenance required
  • Performance optimization needed for scale
  • Steep learning curve
  • No official support for self-hosted version

Odoo

Odoo is an open-source enterprise resource planning (ERP) platform with over 30 integrated business applications, combining tools for CRM, sales, accounting, inventory, HR, project management, website building, and e-commerce.

★ ★ ★ ★ ★ 4.5
Freemium (Open Source) Best for: Businesses looking for an integrated, scalable ERP solution with open-source flexibility.

Free for one app, paid plans for more apps and enterprise features, starting around $7-$11 per user per month (billed annually).

1 screenshot — click to enlarge

Odoo ERP Screenshot 1

✓ Pros

  • All-in-one integrated solution for various business functions
  • Highly scalable and customizable due to its open-source nature
  • User-friendly interface for managing multiple workflows
  • Offers both community (free) and enterprise (paid) editions

✕ Cons

  • Some modules may require specialist help for customization
  • Per-user pricing can increase significantly with business growth
  • No automated migration from Standard to Custom versions
  • Support can be inconsistent for uncommon issues

Mailtrain

Self-hosted newsletter application built on Node.js and MySQL/MariaDB for managing email marketing campaigns with features like subscriber list management, segmentation, automation, and reporting.

★ ★ ★ ★ ★ 3.5
Free & Open Source Best for: Self-hosting email marketing for full data control.

Free, self-hosted open-source software.

3 screenshots — click to enlarge

Mailtrain Screenshot 1
GitHub Copilot Screenshot 2

✓ Pros

  • Self-hosted
  • Subscriber list management for large lists
  • List segmentation
  • Custom fields and merge tags
  • MJML-based responsive email templates
  • Automation capabilities (triggered and RSS campaigns)
  • Granular user permissions
  • Built-in reporting
  • GPG Encryption
  • Detailed click statistics
  • Supports sending via any SMTP provider, with webhooks for major services (SES, SparkPost, SendGrid, Mailgun)
  • Completely open source (GPLv3 license)
  • API for subscriber management

✕ Cons

  • No native paid subscriptions feature
  • Lack of embeddable forms for subscriptions
  • No landing page builder
  • Limited direct third-party integrations (beyond email sending)
  • No drag-and-drop visual email editor
  • No custom domain support
  • No referral program management
  • Requires technical expertise for setup and maintenance (self-hosted)
  • Development activity might be slow (last commit over 2 years ago)

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