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Open-source repos for B2B services

67 repos tagged B2B services, sorted by GitHub stars. Add filters from the other category types to narrow the list.

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  1. rustdesk/rustdesk

    Remote desktop tool for support and admin work, with the option to run your own relay server instead of a vendor cloud.

    Helpdesk, Android, iOS, IT and security, Customer support, Self hosters

    128k starsAGPL-3.0Updated 3 Nov 2026

  2. twentyhq/twenty

    Self-hosted CRM for contacts, companies and deal pipelines with custom objects, workflows and an API.

    CRM, Workflow automation, Web, Docker, Sales, SaaS, Self hosters

    60.4k starsOtherUpdated 3 Nov 2026

  3. odoo/odoo

    Odoo community edition, a suite of business apps including accounting, sales and e-commerce.

    Accounting, Inventory, Storefronts, Web, Docker, Finance, Operations, Retail, Manufacturing, Self hosters

    55.5k starsOtherUpdated 3 Nov 2026

  4. calcom/cal.diy

    Self-hosted Calendly-style scheduling with booking pages, availability rules and calendar sync.

    Booking, Docker, Web, Operations, Sales, SaaS, Self hosters

    49.7k starsMITUpdated 3 Nov 2026

  5. frappe/erpnext

    Full ERP covering accounting, inventory, sales, purchasing and manufacturing.

    Accounting, Inventory, Invoicing, Web, Docker, Finance, Operations, Manufacturing, Retail, Self hosters

    40.9k starsGPL-3.0Updated 3 Nov 2026

  6. krayin/laravel-crm

    Laravel CRM for tracking leads, contacts, quotes and sales activities with a kanban pipeline.

    CRM, Lead generation, Web, Sales, Agencies, Self hosters

    24.1k starsMITUpdated 2 Nov 2026

  7. 1Panel-dev/MaxKB

    Enterprise knowledge-base assistant with RAG and agent workflows, embeddable into websites.

    Knowledge base, Chatbots, RAG and search, Docker, Ollama, Customer support, Operations, SaaS, No-code, Self hosters

    23.1k starsGPL-3.0Updated 3 Nov 2026

  8. docusealco/docuseal

    Self-hosted DocuSign alternative for building PDF forms and collecting legally binding signatures.

    E-signature, Forms and surveys, Docker, Web, Legal and compliance, Sales, Legal, Self hosters

    19k starsAGPL-3.0Updated 2 Nov 2026

  9. laramies/theHarvester

    Collects emails, names and subdomains for a company domain from public search sources.

    Lead generation, Enrichment, Web scraping, Google Search, Sales, IT and security

    18.2k starsGPL-2.0Updated 30 Oct 2026

  10. documenso/documenso

    Open-source document signing platform with templates, audit trails and an API.

    E-signature, Forms and surveys, Docker, Web, Legal and compliance, Sales, Legal, SaaS, Self hosters

    15.6k starsAGPL-3.0Updated 3 Nov 2026

  11. zitadel/zitadel

    Identity management platform with multi-tenancy, passkeys, OIDC, SAML and an audit trail for B2B and SaaS apps.

    Auth and identity, Web, Engineering, IT and security, SaaS

    15.5k starsAGPL-3.0Updated 3 Nov 2026

  12. aureuserp/aureuserp

    Laravel and Filament ERP with accounting, inventory, sales and HR modules.

    Accounting, Inventory, Project management, Web, Finance, Operations, Self hosters

    12.2k starsMITUpdated 2 Nov 2026

  13. mautic/mautic

    Open-source marketing automation platform for email campaigns, segments, lead scoring and landing pages.

    Email campaigns, Workflow automation, Lead generation, Email, Marketing, Sales, SaaS, Self hosters

    10.9k starsOtherUpdated 3 Nov 2026

  14. invoiceninja/invoiceninja

    Invoicing, quotes, expenses and time tracking with a client portal and online payments.

    Invoicing, Payments, Web, Finance, Agencies, Solo founders

    10.5k starsOtherUpdated 2 Nov 2026

  15. reacherhq/check-if-email-exists

    Tests whether an email address is real without sending a message, from a command-line tool or an HTTP service.

    Enrichment, Email campaigns, Email, Sales, Marketing, SaaS, Self hosters

    10.4k starsMITUpdated 30 Oct 2026

  16. akaunting/akaunting

    Online accounting for small businesses with invoices, expenses, banking and an app store.

    Accounting, Invoicing, Web, Finance, Local business, Self hosters

    10.3k starsOtherUpdated 3 Nov 2026

  17. papermark/papermark

    Self-hostable DocSend alternative for sharing pitch decks and sales documents with page-level analytics.

    Analytics dashboards, Web, Sales, SaaS, Self hosters

    9.3k starsOtherUpdated 28 Aug 2026

  18. frappe/hrms

    Frappe HR, an HR and payroll suite with salary structures, leave and expense claims.

    Payroll, Onboarding, Hiring (ATS), Web, HR, Finance, Self hosters

    9k starsGPL-3.0Updated 2 Nov 2026

  19. idurar/idurar-erp-crm

    MERN-stack ERP and CRM for invoices, quotes, payments and customers.

    Invoicing, CRM, Web, Finance, Sales, Local business, Self hosters

    8.9k starsAGPL-3.0Updated 15 Aug 2026

  20. Sylius/Sylius

    Symfony-based headless commerce framework for custom B2C and B2B stores.

    Storefronts, Web, Engineering, E-commerce

    8.6k starsMITUpdated 3 Nov 2026

  21. vendurehq/vendure

    Headless commerce framework on Node.js and TypeScript with a GraphQL API and plugin system.

    Storefronts, Inventory, Web, Engineering, E-commerce

    8.6k starsOtherUpdated 2 Nov 2026

  22. crater-invoice-inc/crater

    Laravel and Vue app for invoices, estimates, expenses and payments for small firms.

    Invoicing, Web, Finance, Solo founders

    8.4k starsAGPL-3.0Updated 10 Aug 2024

  23. Dolibarr/dolibarr

    Modular ERP and CRM for small firms covering invoices, stock, HR and accounting.

    Accounting, Invoicing, CRM, Web, Docker, Finance, Operations, Local business, Manufacturing, Self hosters

    7.8k starsGPL-3.0Updated 3 Nov 2026

  24. OpenSignLabs/OpenSign

    Free e-signature tool for sending documents to multiple signers with templates and reminders.

    E-signature, Docker, Web, Legal and compliance, HR, Legal

    7.2k starsOtherUpdated 30 Oct 2026

  25. vas3k/TaxHacker

    Self-hosted AI app that reads receipts and invoices and sorts them for tax bookkeeping.

    Accounting, LLM apps, Web, OpenAI, Finance, Self hosters, Solo founders

    6.8k starsMITUpdated 31 Oct 2026

  26. al1abb/invoify

    Next.js web app that generates invoice PDFs from a form, with templates and export.

    Invoicing, Web, Finance, Solo founders

    6.4k starsMITUpdated 24 Aug 2026

  27. passbolt/passbolt_api

    Team password manager with sharing, permissions and audit logs, designed for collaboration.

    Password management, Docker, Operations, IT and security, Agencies

    6.2k starsAGPL-3.0Updated 20 Oct 2026

  28. zammad/zammad

    Web helpdesk with ticketing across email, chat, phone and social, plus SLAs and a knowledge base.

    Helpdesk, Knowledge base, Web, Email, Customer support, SaaS, Self hosters

    6.1k starsAGPL-3.0Updated 3 Nov 2026

  29. SuiteCRM/SuiteCRM

    Full CRM covering sales pipelines, marketing campaigns, quotes and support cases, a Salesforce alternative.

    CRM, Email campaigns, Web, Sales, Marketing, Self hosters

    5.8k starsAGPL-3.0Updated 29 Oct 2026

  30. joeyism/linkedin_scraper

    Python library that scrapes LinkedIn person and company profiles with Selenium.

    Web scraping, Lead generation, Enrichment, LinkedIn, Sales, Recruiting

    4.6k starsGPL-3.0Updated 10 Apr 2026

  31. erxes/erxes

    Plugin-based platform combining CRM, team inbox, live chat, knowledge base and marketing automation.

    CRM, Helpdesk, Knowledge base, Web, Email, Sales, Customer support, SaaS, Self hosters

    4.1k starsOtherUpdated 3 Nov 2026

  32. stickerdaniel/linkedin-mcp-server

    MCP server that lets AI assistants read LinkedIn profiles, companies, jobs and messages.

    Enrichment, AI agents, Outreach, LinkedIn, Anthropic, Sales, Recruiting

    4.1k starsApache-2.0Updated 1 Nov 2026

  33. bigcapitalhq/bigcapital

    Accounting and inventory software with financial reports for small businesses.

    Accounting, Inventory, Analytics dashboards, Web, Docker, Finance, Self hosters

    4k starsAGPL-3.0Updated 2 Nov 2026

  34. frappe/crm

    CRM on the Frappe framework for managing leads, deals and follow-ups with WhatsApp and telephony hooks.

    CRM, Web, WhatsApp, Sales, Self hosters

    3.9k starsAGPL-3.0Updated 2 Nov 2026

  35. daviddrysdale/python-phonenumbers

    Python version of Google's libphonenumber for parsing, formatting and validating phone numbers in lead data.

    Enrichment, Sales, Engineering

    3.8k starsApache-2.0Updated 31 Oct 2026

  36. fatfreecrm/fat_free_crm

    Ruby on Rails CRM with leads, campaigns, contacts and opportunity tracking for small teams.

    CRM, Web, Sales, Self hosters

    3.6k starsOtherUpdated 27 Oct 2026

  37. espocrm/espocrm

    Web CRM for leads, accounts, opportunities and cases with a flexible entity manager and email integration.

    CRM, Helpdesk, Web, Email, Sales, Customer support, Self hosters

    3.5k starsAGPL-3.0Updated 2 Nov 2026

  38. growchief/growchief

    Self-hosted tool that automates social outreach steps like connection requests and follow-up messages.

    Outreach, Lead generation, LinkedIn, X (Twitter), Sales, Marketing

    3.5k starsAGPL-3.0Updated 13 Oct 2025

  39. frappe/helpdesk

    Ticketing system on Frappe with SLA rules, canned responses and a customer self-service portal.

    Helpdesk, Knowledge base, Web, Customer support, Self hosters

    3.5k starsAGPL-3.0Updated 2 Nov 2026

  40. eracle/OpenOutreach

    Self-hosted AI agent that finds B2B prospects on LinkedIn and runs personalised outreach sequences.

    Outreach, Lead generation, AI agents, LinkedIn, Sales, SaaS, Self hosters

    3.4k starsGPL-3.0Updated 23 Oct 2026

  41. InvoicePlane/InvoicePlane

    Self-hosted app for quotes, invoices, clients and payment records.

    Invoicing, Web, Finance, Self hosters

    3.3k starsOtherUpdated 31 Oct 2026

  42. filip-michalsky/SalesGPT

    LLM sales agent that follows a sales conversation playbook over chat, email or voice with tool use.

    AI agents, Outreach, Chatbots, OpenAI, Sales, SaaS

    2.8k starsMITUpdated 17 Sept 2024

  43. Django-CRM/Django-CRM

    CRM with leads, contacts, opportunities, support cases and invoices built on Django and React.

    CRM, Helpdesk, Web, Sales, Customer support, Self hosters

    2.5k starsMITUpdated 31 Oct 2026

  44. cortezaproject/corteza

    Low-code platform for building records-based business apps and CRMs with workflows.

    Internal tools, CRM, Workflow automation, Web, Docker, Operations, Sales, Government, Self hosters, No-code

    2.2k starsApache-2.0Updated 20 Oct 2026

  45. simple-salesforce/simple-salesforce

    Python REST client for Salesforce for querying, creating and bulk-updating CRM records.

    CRM, Internal tools, Salesforce, Sales, Engineering

    1.9k starsOtherUpdated 9 Jul 2026

  46. InvoiceShelf/InvoiceShelf

    Self-hosted invoicing and expense app, an active continuation of Crater.

    Invoicing, Web, Docker, Finance, Self hosters, Solo founders

    1.9k starsAGPL-3.0Updated 28 Oct 2026

  47. relaticle/relaticle

    Self-hosted CRM built with Laravel and Filament, with custom fields and an API that AI agents can use.

    CRM, AI agents, Web, Sales, SaaS, Self hosters

    1.8k starsAGPL-3.0Updated 3 Nov 2026

  48. FOSSBilling/FOSSBilling

    Billing and client management for hosting and service businesses.

    Subscription billing, Invoicing, CRM, Web, Finance, Customer support, SaaS, Self hosters

    1.7k starsApache-2.0Updated 2 Nov 2026

  49. horilla/horilla-hr

    Django HR system covering payroll, attendance, leave and recruitment.

    Payroll, Hiring (ATS), Onboarding, Web, Docker, HR, Finance, Self hosters

    1.5k starsLGPL-2.1Updated 2 Nov 2026

  50. andrewdwallo/erpsaas

    Laravel accounting app with double-entry books, invoices, bills and reports.

    Accounting, Invoicing, Web, Finance

    1.5k starsMITUpdated 5 Mar 2026

  51. faveosuite/faveo-helpdesk

    Laravel ticketing system with SLA, canned replies and a knowledge base.

    Helpdesk, Knowledge base, Web, Email, Customer support, Self hosters

    1.3k starsOSL-3.0Updated 3 Nov 2026

  52. Combodo/iTop

    IT service management suite with a configuration database, incident and change tickets and a user portal.

    Helpdesk, Web, IT and security, Customer support, Self hosters

    1.2k starsAGPL-3.0Updated 3 Nov 2026

  53. VladSez/easy-invoice-pdf

    Browser-based invoice generator with live PDF preview and no signup.

    Invoicing, Web, Finance, Solo founders

    1.1k starsAGPL-3.0Updated 4 Nov 2026

  54. itflow-org/itflow

    Documentation, ticketing and billing system built for managed service providers.

    Helpdesk, Invoicing, Docs and wiki, Web, Customer support, IT and security, Self hosters

    1k starsAGPL-3.0Updated 1 Nov 2026

  55. SolidInvoice/SolidInvoice

    Self-hosted invoicing and quoting app for freelancers and small businesses.

    Invoicing, Web, Finance, Self hosters, Solo founders

    980 starsMITUpdated 3 Nov 2026

  56. warmbly/warmbly

    Sends B2B cold email sequences from your own mailboxes and runs warm-up sending to build their reputation.

    Outreach, Email campaigns, Email, Sales, Agencies, Self hosters

    882 starsApache-2.0Updated 2 Nov 2026

  57. pdovhomilja/nextcrm-app

    Next.js CRM covering accounts, contacts, opportunities, projects, invoices and documents for small teams.

    CRM, Invoicing, Web, Vercel, Sales, SaaS, Solo founders

    736 starsMITUpdated 3 Nov 2026

  58. oroinc/crm

    Symfony-based CRM for B2B commerce with customer data, sales processes and marketing lists.

    CRM, Web, Sales, E-commerce, Self hosters

    688 starsOtherUpdated 31 Oct 2026

  59. DjangoCRM/django-crm

    Django-based CRM with deals, tasks, email marketing and analytics for small sales teams.

    CRM, Email campaigns, Analytics dashboards, Web, Email, Sales, Self hosters

    650 starsAGPL-3.0Updated 2 Nov 2026

  60. znuny/Znuny

    OTRS-derived ticketing system for customer service and IT service management.

    Helpdesk, Web, Email, Customer support, IT and security, Government, Self hosters

    611 starsGPL-3.0Updated 3 Nov 2026

  61. venturedrake/laravel-crm

    Laravel package that adds CRM features such as leads, deals, quotes and orders to an existing app.

    CRM, Web, Sales, Engineering

    472 starsMITUpdated 1 Nov 2026

  62. HubSpot/hubspot-api-python

    Official Python SDK for the HubSpot API covering contacts, deals, companies and tickets.

    CRM, Workflow automation, HubSpot, Sales, Engineering, SaaS

    437 starsApache-2.0Updated 3 Nov 2026

  63. buyukakyuz/email-sleuth

    Rust CLI that guesses and SMTP-verifies professional email addresses from a name and company domain.

    Enrichment, Lead generation, Email, Sales

    427 starsMITUpdated 21 Dec 2025

  64. kaymen99/sales-outreach-automation-langgraph

    LangGraph agents that research and qualify leads from a CRM and draft personalised outreach emails.

    Outreach, Enrichment, AI agents, OpenAI, Email, Sales, Agencies

    405 starsUpdated 15 Jan 2025

  65. invopop/gobl

    Go library and JSON schema for structured e-invoices with a global tax database.

    Invoicing, Tax compliance, Finance, Engineering, Finance and fintech

    317 starsApache-2.0Updated 30 Oct 2026

  66. coreshop/CoreShop

    E-commerce framework that runs inside the Pimcore data platform.

    Storefronts, Web, Engineering, E-commerce

    292 starsOtherUpdated 28 Oct 2026

  67. Payroll-Engine/PayrollEngine

    Framework for building regulation-driven payroll apps across countries.

    Payroll, HR, Engineering

    136 starsMITUpdated 2 Oct 2026