Best Open Source Alternatives to HubSpot in 2026
HubSpot Is Powerful — But the Price Keeps Climbing
HubSpot is the default choice for CRM and marketing automation. The free CRM is genuinely useful, the ecosystem is massive, and the all-in-one platform experience is hard to beat. But the moment you need serious marketing automation, custom reporting, or advanced workflows, the pricing jumps from manageable to eye-watering.
Here's what HubSpot costs in 2026:
| Plan | Price | Notes |
|---|---|---|
| Free CRM | $0 | Up to 2K emails/month, limited automation, basic reporting |
| Starter | $20/seat/month | All hubs, 1,000 marketing contacts, basic automation |
| Professional (Marketing Hub) | $890/month | 3 seats, 2,000 contacts, full automation, A/B testing |
| Enterprise (Marketing Hub) | $3,600/month | 5 seats, 10,000 contacts, predictive lead scoring, custom objects |
Professional requires a $3,000 onboarding fee. Enterprise requires $7,000. Both mandate annual commitments. Contact pricing scales fast — going from 2,000 to 50,000 marketing contacts on Professional adds roughly $700/month. A mid-size company running Marketing plus Sales Hub Professional is looking at $12,000-15,000/year minimum. Enterprise stacks hit $50,000+ annually.
Open source alternatives give you CRM, email marketing, automation, and customer engagement without per-seat licensing or contact-tier pricing. Here are the six best options in 2026.
TL;DR
Twenty CRM is the most promising new CRM for teams who want a modern, developer-friendly alternative with a clean UI and API-first architecture. For full HubSpot replacement across CRM, marketing, and support, Erxes is the closest all-in-one match. If marketing automation is your primary need — email campaigns, lead scoring, landing pages — Mautic is the established leader.
Key Takeaways
- Twenty CRM (40K+ GitHub stars) is the fastest-growing open source CRM with a modern UI, GraphQL/REST APIs, and AI integration. Free and self-hosted.
- Erxes (3.7K+ stars) is the closest open source equivalent to HubSpot's all-in-one approach — CRM, marketing, support, and website building in a plugin-based platform.
- Mautic (9.2K+ stars) is the gold standard for open source marketing automation. Email campaigns, lead scoring, landing pages, and A/B testing — production-proven.
- EspoCRM (2.8K+ stars) is a mature, lightweight CRM with workflow automation, custom entities, and reporting. Runs on a $5/month VPS.
- SuiteCRM (5.3K+ stars) is the enterprise-grade alternative with 5 million+ users globally. Sales, marketing, and service modules plus workflow automation.
- Chatwoot (27K+ stars) is the customer engagement layer — omnichannel live chat, email, social, and WhatsApp in a unified inbox. Strong HubSpot Service Hub replacement.
- No single open source tool replicates all of HubSpot. The strongest strategy is combining two tools — a CRM with a marketing/engagement platform.
Quick Comparison
| Feature | Twenty CRM | Erxes | Mautic | EspoCRM | SuiteCRM | Chatwoot |
|---|---|---|---|---|---|---|
| CRM (Contacts/Deals) | Yes | Yes | Basic | Yes | Yes | Basic |
| Email Marketing | Roadmap | Plugin | Yes | Via integration | Yes | No |
| Marketing Automation | Roadmap | Plugin | Yes | Workflows | Campaigns | No |
| Lead Scoring | Roadmap | Yes | Yes | No | Via workflows | No |
| Landing Pages | No | Plugin | Yes | No | No | No |
| Live Chat | No | Yes | No | No | No | Yes |
| Reporting | Views + Analytics | Dashboards | Campaign analytics | Reports + Charts | Dashboards + Reports | CSAT + Overview |
| API | GraphQL + REST | GraphQL | REST | REST | REST | REST |
| Self-Hosting | Docker Compose | Docker | Docker, LAMP | Docker, LAMP | Docker, LAMP | Docker |
| License | AGPL-3.0 | AGPL-3.0 | GPL-3.0 | GPL-3.0 | AGPL-3.0 | MIT |
| GitHub Stars | 40K+ | 3.7K+ | 9.2K+ | 2.8K+ | 5.3K+ | 27K+ |
| Best For | Modern CRM | All-in-one | Marketing automation | Lightweight CRM | Enterprise CRM | Customer support |
Twenty CRM — Most Promising Modern CRM
Twenty CRM is the fastest-rising star in open source CRM. With 40K+ GitHub stars and Y Combinator backing, it's building a modern Salesforce alternative with developer experience and UI polish that open source CRM has historically lacked.
What It Does Well
The interface stands out immediately — clean, keyboard-driven, and responsive, closer to Linear or Notion than a traditional CRM. Contact and company records support custom views with filters, sorting, grouping, kanban boards, and table layouts.
The API-first architecture is a major differentiator. Full GraphQL and REST APIs integrate with anything, and the MCP extension enables AI assistants to query and update CRM records through natural language. Core CRM is solid: contact and company management, deal pipelines, task tracking, notes, and activity timelines, all built on PostgreSQL with flexible schemas supporting custom fields and objects.
Fully self-hosted via Docker Compose (React frontend, Node.js API, PostgreSQL, Redis). No limits on users or records.
Limitations
Email marketing, marketing automation, and lead scoring are on the roadmap but not built yet. No landing pages or campaign management. Pair with Mautic for marketing capabilities. The plugin ecosystem doesn't exist yet — extensibility comes through the API.
Best for: Developer-oriented teams who want a modern, API-first CRM and will integrate separate tools for marketing automation.
Erxes — Best All-in-One HubSpot Replacement
Erxes bills itself as an "Experience Operating System" (XOS) — the closest thing in open source to HubSpot's all-in-one approach. CRM, marketing, support, content management, and e-commerce capabilities live under one roof.
What It Does Well
The plugin-based architecture is the defining feature. The core provides contacts, segments, automation, and documents. Omnichannel inbox, sales pipelines, marketing tools, help desk, knowledge base, and website builder plug in as needed.
For marketing, Erxes offers landing pages, forms, pop-ups, and embed placements for lead capture. The automation module builds multi-step workflows triggered by contact behavior or time-based conditions. The omnichannel inbox consolidates email, live chat, Facebook, and Instagram conversations — HubSpot Service Hub territory handled natively.
Content publishing includes headless websites, knowledge bases, and help centers. Self-hosted with TypeScript/Node.js, MongoDB, Redis, Elasticsearch, and RabbitMQ via Docker Compose. Plan for 4GB+ RAM given the microservices architecture.
Limitations
No single module matches a dedicated tool's depth — marketing isn't as rich as Mautic, CRM isn't as polished as Twenty, live chat isn't as mature as Chatwoot. Documentation can be sparse, and the smaller community (3.7K stars) means fewer guides and troubleshooting resources.
Best for: Teams that want a single self-hosted platform replacing HubSpot across CRM, marketing, and support, valuing reduced tool count over best-in-class in each category.
Mautic — Best for Marketing Automation
Mautic is the established leader in open source marketing automation. With 9.2K+ GitHub stars and version 7.0 released in January 2026, it's the most production-proven option for email campaigns, lead nurturing, and marketing workflows.
What It Does Well
Email marketing is the core strength. A drag-and-drop builder for creating, personalizing, and A/B testing emails, with template management, dynamic content blocks, and personalization tokens — the kind of capabilities HubSpot charges $890/month for.
The visual campaign builder is where Mautic shines. Build multi-step campaigns that trigger emails, update contacts, assign leads, and branch based on engagement decisions (opened email? clicked link? visited page?). This is comparable to HubSpot's workflow automation, and it's free.
Lead scoring integrates with campaigns — assign points for engagement actions and trigger sales notifications or campaign changes at thresholds. Landing pages and forms are built in with a visual builder. Native integrations exist for Salesforce, Zoho, and Microsoft Dynamics, plus GDPR/CCPA compliance workflows ship out of the box.
Self-hosted as a PHP (Symfony) app with MySQL/MariaDB. The critical infrastructure decision is email sending — pair with Amazon SES, Mailgun, or SendGrid for deliverability.
Limitations
Mautic is marketing automation, not CRM. No deal pipelines, sales forecasting, or account management. The UI is functional but dated. Performance degrades with large contact databases (100K+) without MySQL tuning. Pair with Twenty, EspoCRM, or SuiteCRM for full CRM functionality.
Best for: Marketing teams who need email campaigns, lead scoring, landing pages, and nurture sequences. The strongest HubSpot Marketing Hub replacement in open source.
EspoCRM — Best Lightweight CRM for Small Teams
EspoCRM is the quiet workhorse — a well-built, self-hosted CRM that does what it needs to with minimal overhead.
What It Does Well
The clean UI is uncluttered and intuitive with a short learning curve. Contact and company records, deal pipelines, tasks, calendar, and email integration are immediately accessible.
Customization runs deep through the Entity Manager — create custom entities, fields, relationships, and layouts without code. Workflow automation triggers actions on record creation, field changes, or time-based conditions. Reporting includes list reports, grid reports, and chart dashboards with filters, grouping, and calculated columns.
Self-hosted as a PHP app with MySQL/MariaDB on Apache or Nginx. The simplest requirements here — a $5/month VPS with 1GB RAM handles a small business. Setup takes under 30 minutes.
Limitations
No email campaigns, landing pages, lead scoring, or marketing automation. The smaller community (2.8K stars) means fewer extensions. Enterprise features like SSO/SAML require the paid Advanced Pack.
Best for: Small businesses needing a clean, fast CRM without complexity. Excellent for service businesses, consultancies, and agencies.
SuiteCRM — Best Enterprise-Grade CRM
SuiteCRM is the open source CRM heavyweight — a SugarCRM CE fork that's grown to 5 million users globally with nearly 2 million downloads.
What It Does Well
Enterprise coverage is comprehensive: accounts, contacts, leads, opportunities, quotes, invoices, contracts, products, sales forecasting, and revenue tracking. Marketing capabilities are built in — campaign management with email campaigns, target lists, and ROI tracking.
Workflow automation includes a visual builder with conditions and calculated fields. SuiteCRM 8 introduced AI-driven dashboards with predictive forecasting that analyze deal data to suggest likely conversions — the kind of feature HubSpot charges Enterprise pricing for. Studio and Module Builder create custom modules and layouts through drag-and-drop without code.
The platform also includes a self-service portal, knowledge base, and case management. Self-hosted as a PHP (Symfony for v8) app with MySQL/MariaDB, Elasticsearch, and Apache/Nginx.
Limitations
The interface, even in v8, feels dated compared to modern SaaS CRMs. Steep learning curve given the module count. Performance tuning needed for larger deployments. The SuiteCRM 7-to-8 transition is ongoing, and not all community modules are ported yet.
Best for: Mid-size to large organizations needing enterprise-grade CRM with built-in marketing and service management.
Chatwoot — Best for Customer Engagement and Support
Chatwoot is an omnichannel customer engagement platform, not a traditional CRM. But if your HubSpot usage centers on Service Hub and live chat, it's the strongest open source replacement at 27K+ GitHub stars.
What It Does Well
The unified inbox brings every conversation — live chat, email, Facebook, Instagram, Twitter, WhatsApp, Telegram, Line, SMS — into one dashboard with full conversation history across channels.
Captain, the built-in AI agent, suggests responses, summarizes conversations, and handles common queries autonomously. Campaigns proactively engage visitors based on page URL, time on site, or attributes. Pre-chat forms, custom attributes, Slack integration, and CSAT surveys round out the feature set.
Automation rules auto-assign conversations, add labels, and trigger notifications. Self-hosted as a Ruby on Rails app with PostgreSQL, Redis, and Sidekiq via Docker Compose.
Limitations
No deal pipelines, email marketing, lead scoring, or marketing automation. Reporting focuses on support metrics only. Pair with a CRM for sales and marketing coverage.
Best for: Support teams needing omnichannel communication in a single inbox. The strongest HubSpot Service Hub replacement.
How to Choose the Right HubSpot Alternative
"I need a modern CRM with great developer experience" — Twenty CRM. Pair with Mautic for marketing.
"I want one platform to replace HubSpot entirely" — Erxes. Accept that each module won't be as deep as a dedicated tool.
"Marketing automation is my top priority" — Mautic. Pair with any CRM on this list.
"I'm a small business that just needs CRM" — EspoCRM. Minimal hardware, clean UI, fast setup.
"I need enterprise CRM with built-in marketing" — SuiteCRM. 18+ years of maturity and the deepest feature set.
"Customer support and live chat are my priority" — Chatwoot. Built-in AI, unified inbox, 10+ channels.
"I want the best combined stack" — Twenty CRM + Mautic + Chatwoot. Three tools, full HubSpot coverage, zero per-seat licensing.
Methodology
We evaluated these tools based on:
- Feature parity with HubSpot — CRM, email marketing, marketing automation, lead scoring, landing pages, live chat, and reporting capabilities across Marketing, Sales, and Service Hubs.
- Self-hosting viability — Docker availability, documentation quality, resource requirements, and deployment complexity.
- Community health — GitHub stars, commit frequency, release cadence, and contributor activity as of March 2026.
- Production readiness — Stability at scale, API quality, authentication options, and enterprise feature support.
- Total cost of ownership — Infrastructure requirements, operational overhead, and realistic effort to match HubSpot functionality.
We did not accept payment or sponsorship from any project listed. Tools were evaluated via self-hosted deployments, documentation review, and community feedback.
Find Your Alternative
HubSpot remains excellent — if you can afford it. But when Professional plans start at $890/month with mandatory onboarding fees, the total cost pushes many organizations to look elsewhere.
The open source ecosystem has matured. Twenty CRM brings modern UI standards. Mautic delivers marketing automation that competes with commercial platforms. Chatwoot handles customer engagement with AI included at no cost. The trade-off is engineering time on deployment and maintenance instead of writing checks — and for many organizations spending $15,000-50,000/year on SaaS licensing, that trade-off makes sense.
Browse all HubSpot alternatives on OSSAlt to see detailed feature comparisons, deployment guides, and community reviews.