Salesforce's core workflow, open-source and on your own server: Twenty is a modern CRM built as exactly that alternative. It ships the standard CRM objects out of the box: people, companies, opportunities, notes, and tasks, displayed in table and kanban views with drag-and-drop and real-time updates. Its defining technical feature is a metadata-driven data model: you define custom objects and fields in the UI, and the backend regenerates its GraphQL schema at runtime, so a new object gets working queries, mutations, filters, and sorting within seconds, with no migrations to run - adapting the CRM to your sales process never requires code changes. A REST API is auto-generated from the same schema, GraphQL subscriptions push real-time updates, and webhooks fire on record changes for external integration. A visual workflow builder automates actions like notifications and field updates, TypeScript-based apps extend the platform with custom logic and frontend components, and email and calendar sync pulls Gmail messages and meetings onto contact timelines so communication history sits next to the record. The stack is NestJS with TypeORM, PostgreSQL, Redis, and BullMQ on the backend, React with Jotai on the frontend. Self-hosting on RepoCloud means unlimited users with no per-seat licensing - the pricing model that penalizes growing teams on commercial CRMs - and your pipeline, contacts, and deal history live in your own PostgreSQL database rather than a vendor's.

Teams tired of paying Salesforce or HubSpot per seat run EspoCRM: an AGPL-licensed PHP application with a fast single-page frontend over a REST API, covering sales, support, and marketing in one uncluttered interface. The sales core is complete - leads, contacts, accounts, opportunities with customizable pipeline stages, kanban views, calendars, meetings, and calls. Email is deeply integrated rather than bolted on: IMAP sync links messages to CRM records automatically, and mass email campaigns run with reusable templates, tracking, and Web-to-Lead forms feeding the funnel. Support teams get case management and a customer portal where clients track their own tickets and access a knowledge base. The real differentiator is the Entity Manager: create custom entities, fields, relationships, and layouts from the admin UI without code, with dynamic logic showing or hiding fields conditionally - EspoCRM is as much a business-application platform as a CRM. Formula scripting handles calculated fields and record automation in the free core; the optional Advanced Pack adds visual BPM process design and workflow rules. Role-based permissions with team and territory scoping, full-text search, reports, and a straightforward REST API for n8n or custom integrations round it out. Runs on PHP 8.3+ with MySQL, MariaDB, or PostgreSQL - unlimited users, zero per-seat fees.

Your customer relationships deserve better than a spreadsheet and a prayer: SuiteCRM gives sales, support, and marketing teams one shared system for every account, contact, lead, and deal. Track opportunities through your pipeline with stages, amounts, and close dates, then quote and invoice directly from the won deal without retyping a single line item. Support agents work cases with queues, assignments, and email threading, while marketers build target lists, run email campaigns, and measure opens and clicks against the same records sales uses. Reports query across any modules with grouping, aggregation, and charts, export to CSV or PDF, land on dashboards as dashlets, and arrive by scheduled email so Monday's pipeline review writes itself. Workflow rules react to record changes by sending notifications, creating tasks, updating fields, or calling webhooks, quietly handling the follow-up work humans forget. Roles and security groups decide exactly which teams see which records, down to individual fields, and the audit log remembers every change. Administrators reshape the system without code in Studio, adding fields (including image and file fields), rearranging layouts, and building whole custom modules, while the REST API connects SuiteCRM to your website forms, telephony, and accounting tools. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

With 3,300+ GitHub stars, 200+ releases, and v1.77 shipping in July 2026, Frappe CRM delivers enterprise CRM capabilities without per-seat licensing costs that plague Salesforce and HubSpot deployments. The Python backend running on Frappe Framework v15/v16 with MariaDB and Redis pairs with a Vue 3 frontend using Pinia state management, Vue Router, and the Frappe UI component library styled with Tailwind CSS v3. All-in-one lead and deal pages consolidate activities, comments, notes, tasks, call logs, and email history into a single scrollable view while the drag-and-drop Kanban board provides visual pipeline tracking across configurable stages. Built-in Twilio integration enables click-to-call with recording directly from deal pages, Exotel routes calls through agent mobile phones, and WhatsApp messaging connects via the Frappe WhatsApp module for conversational sales. A visual field layout editor lets non-technical users customize CRM forms, sidepanels, and grid views with real-time drag-and-drop without writing code. The Service Level Agreement engine tracks first-response and rolling-response times against configurable policies with automatic escalation. Meta integration captures leads from Facebook and Instagram ad campaigns directly into the pipeline. ERPNext connectivity extends CRM into invoicing, accounting, inventory, and purchasing with native data flow. Docker Compose deployment with a single command provisions a production-ready instance. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Krayin CRM gives sales teams a visual Kanban pipeline where leads flow through configurable stages — new, contacted, qualified, proposal, won, lost — with deal values tracked per stage, drag-and-drop transitions, and AI-powered document import that extracts contact details from uploaded PDFs, DOCs, and images without manual data entry. Built on Laravel 12 with a Vue.js frontend and MySQL database, the platform delivers complete customer lifecycle management through a two-stage contact model separating unqualified Leads from qualified Persons linked to Organizations, with a unified timeline displaying associated activities, notes, emails, and deals. The activity module schedules calls, meetings, and tasks on a drag-and-drop calendar with reminders and team assignment. A built-in product catalog supports line-item quoting with pricing and quantities. Email integration connects via SMTP, IMAP, and SendGrid parsing, linked to leads and contacts automatically. Workflow automation triggers actions on conditions and pushes events to external systems via webhooks. The dashboard visualizes pipeline performance, top customers, top products, and email engagement with pie charts and trend widgets. Custom attributes add text, number, date, boolean, and dropdown fields to any entity. Role-based ACLs manage team permissions per module. Extensions add multi-tenant SaaS, WhatsApp lead generation, and VoIP calling. Deploy via Docker Compose. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

BottleCRM delivers a self-hosted customer relationship management platform that unifies sales lead qualification, visual deal pipeline tracking, helpdesk ticketing, and client invoicing into one workspace. Sales representatives capture prospects through embeddable website forms or CSV imports, qualifying leads before converting them into synchronized account, contact, and opportunity records. Account executives manage visual Kanban deal boards with stage aging timers and weighted pipeline forecasting, dragging cards across qualification phases while preserving complete interaction timelines. Customer support teams handle incoming inquiries with multi-level ticket hierarchies, business-hours service level agreement clocks, automated escalations, approval workflows, and canned response macros. Billing managers generate professional quotes and invoices directly from won deals, applying customizable line-item tax rates and tracking payment statuses through customer self-service portals. Development teams connect autonomous AI agents and third-party software using personal access tokens against the documented REST API to automate data entry and workflow updates. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Relaticle delivers the first CRM built from the ground up for both human operators and AI agents — a self-hosted platform where Claude, GPT, Gemini, or any custom model connects through a production-grade MCP server exposing 30 tools for full CRUD operations across companies, people, opportunities, tasks, and notes without a single line of integration code. The 22 custom field types include text, email, phone, currency, date, select, multiselect, entity relationships, conditional visibility rules, and per-field encryption — all configurable through the UI without database migrations or code changes. Multi-team isolation enforces data boundaries through a 5-layer authorization system with team-scoped workspaces, API tokens, and granular permissions. The JSON:API REST surface provides Spatie QueryBuilder filtering, sorting, and pagination with schema discovery endpoints that let agents introspect your data model at runtime. A built-in AI chat connects directly to CRM data for natural language queries, while the external MCP server gives any compatible agent the same 30-tool access. Docker Compose deployment runs five containers — app (nginx + PHP-FPM), Horizon queue worker, scheduler, PostgreSQL 17, and Redis 7 — with automatic migrations on startup and demo data seeding for new teams. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Salesforce's platform model, 100% open-source (Apache 2.0): Corteza is a Go/Vue.js low-code platform developed under a foundation, so there is no open-core bait to grow out of. The heart is Corteza Compose: namespaces contain applications, modules define record structures the way Salesforce objects do, and a drag-and-drop page builder assembles record pages, list pages, dashboards, and charts from configurable blocks. Automation comes from a visual, BPMN-style workflow engine plus JavaScript automation scripts, so cross-application business logic - approval chains, field updates, notifications - is configured rather than programmed. Granular role-based permissions reach down to individual modules, fields, and records, mirroring real organizational hierarchies. Corteza CRM ships as the flagship application built entirely on Compose: leads, accounts, opportunities, campaigns, and cases with a 360-degree customer view, covering most Salesforce standard objects - and because it is just a Compose app, adding or reshaping modules is configuration, not a fork. Everything is reachable over REST APIs, deliberately familiar tooling eases Salesforce admin migration, and a CLI can even generate synthetic records for load-testing what you build.

Roughly 40 integrated business apps forming a full ERP: Odoo's open-source suite runs companies end to end. The Community Edition, licensed LGPL-3.0, ships roughly 40 apps covering CRM, sales, invoicing, basic accounting (journals, chart of accounts, taxes, reconciliation), inventory and warehouse management with multi-step routes, manufacturing with BOMs and work orders, purchasing, project management, timesheets, HR, a website builder, and eCommerce. Each app works standalone, but they share one PostgreSQL database and one data model, so a confirmed sale updates stock, triggers procurement, and posts invoices without integration glue. The modular design means you enable only the apps you need and extend with 40,000+ community modules from the Odoo app store covering nearly any vertical requirement. Inventory supports multi-warehouse stock, reordering rules, and lot and serial tracking with barcode-ready operations; manufacturing ties BOMs, work orders, and work-center routing directly to sales demand and stock levels; and the website builder sells straight from your product catalog with payment provider integrations. You can start with just CRM and invoicing on day one and switch on inventory or eCommerce later - new apps integrate with existing data instantly because the schema is shared. The server is Python with an XML/JavaScript view layer, and because data lives in plain PostgreSQL there is no proprietary format: you can query, back up, migrate, and extend business data directly, with unlimited users and no per-seat licensing - where enterprise ERP pricing is per user per month, headcount here costs nothing.

Small teams that have outgrown spreadsheets but balk at per-seat CRM pricing can run Django-CRM on their own server, with leads, deals, tasks, and email campaigns in one self-hosted system. Requests from website contact forms arrive automatically, email requests are imported from the company mailbox, and each gets a unique ticket and is matched against existing companies, contacts, and leads. When nothing matches, a new lead is created and later converted into a company and contact person. Deals carry products, payments, currencies, and price tiers, and the price list exports to Excel. Tasks can be individual or team-based with subtasks, memos can spawn tasks or projects, and participants chat and share files inside each one. Eight analytics reports cover the sales funnel, income forecasts, lead sources, conversions, and closing reasons. The built-in email client works over SMTP and IMAP, supports Gmail through OAuth 2.0, and links each message to its request, lead, or deal. Mass mailings are spread through the workday and can use additional mailboxes to protect managers' main accounts from spam filters. Web forms are protected by reCAPTCHA v3, IP geolocation fills in each requester's country and city, and VoIP callbacks and WhatsApp or Viber messages are supported. Object-level permissions control who can view, add, change, or delete each record, and the interface offers 22 languages. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Follow every sale from first inquiry to final payment inside one self-hosted CRM. Cordys CRM splits the lead-to-cash cycle into connected modules: leads with custom forms and one-click conversion, customers with contact records and shared follow-up among team members, and opportunities that advance through configurable stages from needs confirmation to won or lost. Quotations and contracts come next, with contracts carrying payment plans, payment records, business titles, and invoice records so every collection stays traceable. Orders link to contracts and move through a customizable status flow covering shipment requests, partial and full shipment, inspection, and completion. Approval workflows route requests to reviewers and keep an approval history, and real-time notifications reach users while they work. Administrators draw the organization chart, assign role-based permissions, configure modules and form fields without code, and review system logs. An MCP server secured with per-user API keys lets MaxKB agents search records, create leads, customers, opportunities, and contacts, log follow-ups, and update accounts, while an Agents module embeds those assistants in the CRM and CRM Skills connect OpenClaw and WorkBuddy to the sales process. Sales data can feed DataEase dashboards, WeCom, DingTalk, and Lark integrations link departments and messages to the office platforms teams already use, and the interface ships in English and Chinese. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed with FIT2CLOUD branding terms.

Customermates delivers a modern CRM purpose-built for teams who want practical customer management without enterprise-heavy complexity. The platform manages contacts, organizations, deals, services, and tasks through clean pipeline workflows while integrating AI agent capabilities, REST API access, webhook events, n8n automation connections, and Model Context Protocol tooling for AI-native operations. Team collaboration features include role-based permissions, comprehensive audit logging tracking every data change, and workspace organization for multi-team deployments. The deal pipeline provides customizable stages with drag-and-drop management, while task assignments and service tracking connect directly to contact and organization records for complete relationship context. API-first architecture exposes all CRM data through documented endpoints enabling custom integrations, reporting dashboards, and third-party tool connections. The n8n integration enables no-code workflow automation for lead routing, follow-up sequences, notification triggers, and cross-system data synchronization. Self-hosting requires only two files — a Docker Compose configuration and environment variables — with the published image at ghcr.io/customermates/customermates:latest running database migrations automatically on first boot. PostgreSQL provides the data layer with no additional infrastructure dependencies beyond a reverse proxy for TLS termination. The Community Edition includes unlimited users, unlimited records, full API access, n8n automation, and audit logging at zero cost. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Warpdrive is a self-hosted sales CRM that gives business-development teams the complete Pipedrive workflow, pipelines, deal timelines, and two-way Gmail, on infrastructure they own outright. Drag deals across a Kanban board with custom stages while per-stage weighted totals, rotting-deal warnings, and saved filters keep the forecast honest without a weekly cleanup meeting. Every deal opens into one workspace where activities, notes, files, emails, and the full change history share a single timeline, with participants, followers, labels, and lost reasons attached. People and organizations carry custom fields, firmographics, and org-to-org relationships, and a leads inbox plus CSV import with an undo step keeps new data from corrupting the book. Contact enrichment from Apollo, RocketReach, and GetProspect fills empty people and organization fields, and every enriched value waits behind an explicit review step before it lands. Two-way Gmail sync threads every message onto its deal and contact automatically, and templates, signatures, merge fields, scheduled sends, and open tracking live in the same inbox. Boards, inboxes, and notifications update in real time across the team, while funnel and activity stats show exactly where deals stall and who is carrying the pipeline. An MCP server lets AI assistants query the pipeline and log activity under the same permissions, and role-based access keeps every seat scoped to its own work. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

PingCRM is a personal relationship manager that watches your conversations across Gmail, Telegram, Twitter/X, LinkedIn, and WhatsApp and tells you who you are about to lose touch with. Connect those accounts, and every email, DM, mention, and thread lands on one chronological timeline for each person you know. Each relationship carries a transparent score built from reciprocity, recency, frequency, and breadth, so the dashboard can point at exactly who is going cold and show its working. When someone changes jobs, updates a bio, or hits a birthday, life event detection surfaces it while it is still a good reason to write. The same person hiding behind a work email, a handle, and a profile gets merged into one contact through identity resolution, and the suggestion inbox drafts a contextual follow-up for your review, never sending anything on its own. Browse contacts on a map, watch organizations and their people together, filter a notification feed down to what you missed, and ask questions of the whole graph through the built-in MCP server from your AI client. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.

Quote to cash in one web application - create quotes, convert them to invoices, record payments, track customers: iDURAR is an open-source ERP and CRM platform for small and medium-sized businesses. Built on the MERN stack (MongoDB, Express, React, Node.js) with Ant Design components and Redux state management, it presents a clean SaaS-style interface that needs little onboarding. Core modules cover invoice management with PDF generation and email delivery, payment recording against invoices, quote and proforma handling, customer records, and accounting views over the resulting data. Multi-currency support and localization make it usable for internationally operating teams. Because the whole stack is JavaScript with an API-first backend, extending it - custom fields, new modules, integrations - is approachable for any Node/React developer rather than requiring a specialist ERP skill set. Deployment is straightforward via Docker with a MongoDB instance. Licensed under AGPL-3.0 with free commercial use; a hosted enterprise version exists but the self-hosted edition is fully functional.