When subscriptions for CRM, marketing, analytics, projects, and communications start eating up a noticeable share of the budget, businesses have a third path between “keep paying” and “go back to Excel.” These are free open source alternatives for business: applications with accessible source code that you can deploy on your own server, connect to one another, and customize if needed.
Short answer: amoCRM and the Bitrix24 CRM module can be replaced with Twenty — specifically Twenty, not “Twainty” — or with SuiteCRM, Frappe CRM, and ERPNext. Yandex Metrica and Google Analytics can be replaced with Matomo, Umami, or Plausible; Power BI — with Metabase and Apache Superset; Trello and Jira — with OpenProject, Taiga, Plane, or Redmine; Notion and Confluence — with Nextcloud, BookStack, Wiki.js, and Docmost. It is entirely possible to stand up a compact working stack on a single VPS. But the licenses will be free, while the server, implementation, updates, backups, and security responsibility will not.
This article is not a ranking of the “best software.” It is a map of more than 100 open source solutions for sales, marketing, analytics, support, finance, documents, HR, development, and AI. Choose one tool per function instead of installing the entire catalog.
Contents
- What open source actually gives you
- Main replacement: amoCRM and Bitrix24 with Twenty CRM
- Open source replacement map across all business functions
- What stack to host on one VPS
- How to migrate without stopping sales
- Where you should not deploy open source blindly
- How to calculate savings
- Frequently asked questions
What open source actually gives you
Open source for business means software whose source code is available under a license that allows use, study, modification, and redistribution under its terms. Self-hosted means the application runs on infrastructure you control: a VPS, dedicated server, or private cloud.
It is important to distinguish four models:
| Model | What you get | What to check |
|---|---|---|
| Open source / free software | Code and rights under a free license | The terms of GPL, AGPL, Apache, MIT, and other licenses |
| Open-core | A free core, paid enterprise modules | Whether the Community Edition is enough for your process |
| Source-available | The code is visible, but the license restricts use | Whether it can be used in a commercial environment and modified |
| Free SaaS plan | A cloud service available at no cost within set limits | Limits, data export, risk of pricing changes |
The list below includes projects with a free Community version or a free core that you can deploy yourself. If some features are paid, that is noted as open-core. Before implementing anything, still check the current license for the specific release: a project’s model can change.
A large up-to-date catalog of open source server applications is maintained by the community Awesome Self-Hosted. It has a separate list of non-free software, which is useful for checking trendy “open source” products with restrictive licenses.
Main replacement: amoCRM and Bitrix24 with Twenty CRM
Twenty is a modern CRM with an open core and self-hosted deployment. It stores contacts, companies, deals, tasks, and activities, and lets you modify the data model and export information. The project positions itself as a platform that developers can extend without a closed language or lock-in to a single cloud.
What the transition looks like
| Before | After | What to migrate |
|---|---|---|
| amoCRM: contacts, companies, deals | Twenty: People, Companies, Opportunities | Users, owners, stages, and history |
| Bitrix24 sales funnels | Twenty pipeline/stages | Stage names, probabilities, loss reasons |
| Robots and triggers | Webhooks, API, and an external automation engine | Conditions, delays, notifications, task creation |
| Forms and leads | Forms + API + CRM | Consents, UTM, source, deduplication |
| Reports | CRM views + Metabase/Superset | Metric definitions and access rights |
| Telephony and email | Separate connectors | Numbers, recordings, templates, domain authentication |
Twenty is not a magical clone of amoCRM or Bitrix24. Before migrating, you need to inventory robots, telephony, email templates, permissions, reports, and custom fields. If the process is complex and historically tied to Bitrix24, also consider the mature SuiteCRM, the modular ERPNext or Frappe CRM.
A practical contingency scenario: first move one sales pipeline and active customers, run it in parallel for two weeks, verify the events, and only then shut down the old CRM. You can migrate the archive of closed deals in a second phase.
Open source replacement map across all business functions
Below is not one monolithic “super-Bitrix,” but a toolkit. In each row, choose one primary product and at most one backup candidate.
CRM, sales, and customer management
| What usually solves the problem | Free self-hosted alternatives | Best suited for |
|---|---|---|
| amoCRM, Bitrix24 CRM, HubSpot, Salesforce | Twenty, Frappe CRM | A modern CRM and rapid data model customization |
| Heavy enterprise CRM | SuiteCRM, YetiForce | Complex records, roles, workflows, and reports |
| CRM inside a unified ERP | ERPNext, Dolibarr, Odoo Community | Lead → order → warehouse → invoice workflows |
| Lightweight extensible CRM | Django CRM, Corteza | For teams using Python/Go and custom entities |
The eight options here are not eight required installs. Twenty works well as an intuitive entry point; SuiteCRM as a mature, full-featured system; and ERPNext if your CRM needs to live alongside inventory, purchasing, and finance from day one.
ERP, purchasing, inventory, manufacturing, and POS
| Paid-tier class | Open source options | What they cover |
|---|---|---|
| ERP for small and midsize businesses | ERPNext, Dolibarr, Tryton | Sales, purchasing, inventory, projects, basic finance |
| Modular business platform | Odoo Community, iDempiere | CRM, SCM, manufacturing, operations; some Odoo features are paid |
| Large, integrable ERP | Apache OFBiz | Orders, accounting, catalog, inventory, and custom module development |
| Accounting and invoicing | FrontAccounting, SolidInvoice | Basic financial accounting and invoicing |
| Inventory and components | InvenTree, Snipe-IT | Components, assets, serial numbers, and asset tracking |
| Retail point of sale | uniCenta oPOS, POS module for ERPNext | Register sales and stock levels; local fiscal compliance needs to be checked separately |
For regulated Russian accounting and tax reporting, these products cannot automatically be called a replacement for 1C. Often the sensible approach is to keep 1C for mandatory accounting and move CRM, inventory analytics, requests, and internal workflows into an open source stack.
Marketing, email campaigns, forms, and social media
| Instead of | Open source options | Function |
|---|---|---|
| Mindbox, HubSpot Marketing, expensive CDP scenarios | Mautic | Segments, campaigns, forms, lead scoring, and marketing automation |
| Mailchimp, Unisender, and mass email campaigns | listmonk, Keila, phpList | Lists, campaigns, templates, and analytics |
| Transactional email server | Postal | Your own mail delivery; requires DNS, IP reputation, and administration |
| Typeform, Google Forms, Yandex Forms | LimeSurvey, OhMyForm | Surveys, questionnaires, and lead generation forms |
| Social media scheduling | Mixpost Lite, Postiz | Posts and content calendar; verify the specific edition’s license before implementation |
| Community and forum | Discourse, Flarum, HumHub | Forum, community hub, and your own social network |
| Link shortener and UTM | Shlink, YOURLS | Short links, QR codes, and click analytics |
Self-hosted sending is free in terms of license, but not in terms of deliverability. You need SPF, DKIM, DMARC, domain warming, unsubscribe handling, and compliance with personal data and advertising rules.
Web, product, and end-to-end analytics
| Instead of | Open source options | Function |
|---|---|---|
| Google Analytics and Yandex Metrica | Matomo, Plausible Community Edition, Umami, Ackee | Web analytics on your own infrastructure |
| Mixpanel, Amplitude, part of Hotjar | PostHog, Countly Community | Events, funnels, and product metrics; feature sets vary by edition |
| Power BI, Tableau | Metabase, Apache Superset, Redash | BI dashboards, SQL, charts, and data access |
| A/B testing and feature flags | GrowthBook, Unleash | Experiments and gradual feature rollouts |
| ETL and analytics pipelines | Meltano, Apache Hop, dbt Core | Data loading, transformation, and documentation |
| Search across data and logs | OpenSearch, Meilisearch, Typesense | Full-text search, indexes, logs, and directories |
For end-to-end analytics, free BI does not solve data quality issues. First define what counts as a lead, sale, return, source, and gross profit, then connect the dashboard.
Websites, CMS, e-commerce, and content
| Instead of | Open source options | Function |
|---|---|---|
| Tilda, Bitrix: Site Management | WordPress, Drupal, Joomla, Ghost | Websites, media, landing pages, and content projects |
| Headless CMS | Strapi Community, Payload | API-first content for websites and apps; verify the current version’s license |
| Shopify, InSales, paid e-commerce CMS | WooCommerce, PrestaShop, Magento Open Source | Catalog, cart, orders, plugins, and integrations |
| Modern headless commerce | Medusa, Saleor, Sylius | Custom stores and omnichannel use cases |
A store’s free core quickly grows into paid cost items: payment processing, online cash register, shipping, 1C, SMS, support, and development. It makes sense to save on license dependence, not on critical integrations.
Customer support, help desk, and ITSM
| Instead of | Open source options | Feature |
|---|---|---|
| Zendesk, HelpDesk, Bitrix24 tickets | Zammad, FreeScout, osTicket | Email tickets, queues, SLA, and ticket history |
| Service desk and equipment inventory | GLPI, iTop | ITSM, CMDB, requests, and assets |
| Lightweight help desk | Peppermint, UVdesk Community | Simple support queues and a knowledge base |
Some well-known products with an “open-source past” change their licensing. For example, Awesome Self-Hosted lists the current version of Chatwoot as non-free. So when making a purchasing decision, trust not the word open, but the license text for the release.
Projects, tasks, products, and time
| Instead of | Open source options | Feature |
|---|---|---|
| Jira and MS Project | OpenProject, Redmine | Projects, charts, roles, tasks, and deadlines |
| Trello, YouGile, Kaiten | Taiga, Plane, Wekan | Kanban, backlog, sprints, and collaboration |
| Lightweight tasks | Vikunja, Kanboard, Leantime | Lists, boards, goals, and small teams |
| Time tracking | Kimai, ActivityWatch | Timesheets and local activity tracking |
| Roadmap and ideas | Focalboard Personal Server, Gitea Projects | A simple product board alongside development |
Files, documents, knowledge base, and e-signature
| Instead of | Open source options | Feature |
|---|---|---|
| Google Drive, Yandex Disk, Dropbox | Nextcloud, ownCloud, Seafile Community | Files, sync, permissions, links, and collaboration |
| Notion and Confluence | BookStack, Wiki.js, DokuWiki, Docmost | Policies, knowledge base, and internal documentation |
| Google Docs and Microsoft 365 | ONLYOFFICE Community, Collabora Online | Browser-based document editing; check Community edition limits |
| Document archive and OCR | Paperless-ngx, Mayan EDMS | Scanning, OCR, tags, and full-text archive |
| DocuSign and approval signatures | Documenso, DocuSeal | Signature workflows and templates; confirm the legal enforceability of the use case separately |
| Collaborative secure documents | CryptPad | Documents and boards with a strong focus on privacy |
Chats, video calls, calendar, and meetings
| Instead of | Open source options | Function |
|---|---|---|
| Slack, Teams, enterprise messengers | Zulip, Matrix Synapse, Element | Channels, threads, federation, and your own server |
| Zoom, webinars, and video meetings | Jitsi Meet, BigBlueButton | Video conferencing; BigBlueButton is especially strong for training |
| Calendly and scheduling services | Cal.com, Easy!Appointments, Rallly | Time slots, booking, and scheduling coordination |
| Business email | Mailcow, Mailu | A full mail stack; requires ongoing administration and IP reputation management |
| Corporate forum | Discourse, Flarum | Asynchronous discussions and a Q&A knowledge base |
Email and video conferencing are two categories you should not move to a random cheap VPS just to save money. They have high requirements for deliverability, networking, updates, and monitoring.
HR, recruiting, training, and scheduling
| Instead of | Open source options | Function |
|---|---|---|
| HRM and employee portal | Frappe HR, OrangeHRM Starter, Horilla | Employees, time off, attendance, basic HR processes |
| ATS and recruiting | OpenCATS, recruiting in Frappe HR | Job openings, candidates, and hiring stages |
| LMS and corporate training | Moodle, Chamilo | Courses, quizzes, roles, and progress tracking |
| Time tracking and shift management | Kimai, TimeTrex Community | Timesheets and scheduling; verify local HR features separately |
| Resource booking | LibreBooking, Easy!Appointments | Meeting rooms, equipment, and client reception |
Automation, low-code, and internal apps
| Instead of | Open source alternatives | Function |
|---|---|---|
| Zapier and Make | Activepieces, Automatisch, Node-RED | Integrations, triggers, and data flows; verify what is included in the free edition |
| Complex process scheduler | Apache Airflow, Temporal | Reliable workflows and background jobs |
| Retool and internal dashboards | Appsmith Community, ToolJet Community, Budibase | Admin panels, forms, and internal apps |
| Airtable and operational spreadsheets | Grist | Spreadsheets with types, formulas, and access controls |
| API and integrations | Apache Camel, Kong Gateway Community | API routing and integration patterns |
For CRM automation, it helps to move logic out of a specific vendor: Twenty stores the customer and deal, Activepieces or Node-RED receives the webhook, checks conditions, sends an email, creates a task, and writes the result back. That way, business rules do not disappear the next time you migrate.
Design, video, and creative work
| Instead of | Open source alternatives | Function |
|---|---|---|
| Figma | Penpot | Interfaces, prototypes, and collaborative design |
| Adobe Photoshop and Illustrator | GIMP, Krita, Inkscape | Raster, illustration, and vector graphics |
| Adobe InDesign | Scribus | Layout for print materials and PDFs |
| 3D and some video production | Blender | 3D, animation, compositing, and editing |
| Fast video editing | Kdenlive, Shotcut | Editing clips and promotional materials |
| Screen recording and streaming | OBS Studio | Webinars, training, livestreams, and demo recording |
Development, infrastructure, security, and monitoring
| Instead of | Open source alternatives | Function |
|---|---|---|
| GitHub/GitLab SaaS | Forgejo, Gitea, GitLab Community Edition | Git, issues, pull/merge requests, and CI |
| CI/CD | Jenkins, Woodpecker CI | Builds, tests, and deployment |
| Docker registry | Harbor | Images, scanning, and access policies |
| Monitoring | Prometheus, Grafana, Zabbix | Metrics, dashboards, and alerts |
| Availability monitoring | Uptime Kuma | HTTP/TCP/DNS checks and status pages |
| Logs and errors | Grafana Loki, GlitchTip | Centralized application logs and errors |
| SSO and access management | Keycloak, Authelia | Single sign-on, MFA, and access policies |
| Team passwords and secrets | Vaultwarden, Passbolt Community | Password storage and shared access |
| Node protection and SIEM | Wazuh, CrowdSec, ClamAV | Security events, blocking, and file scanning |
| VPN and private network | WireGuard, Headscale, NetBird | Access to internal services without exposing them to the internet |
| Backup | Restic, BorgBackup, Kopia | Encrypted incremental backups |
| Databases and cache | PostgreSQL, MariaDB, Valkey | Application data and cache without closed SaaS |
Enterprise AI on your own infrastructure
| Instead of | Open source options | Function |
|---|---|---|
| Cloud chat with LLM | Open WebUI, LibreChat | A single interface for local and external models |
| Local model deployment | Ollama, vLLM | Inference on a workstation or GPU server |
| LLM gateway | LiteLLM | Unified API, routing, limits, and logs |
| Visual AI workflows | Flowise, Langflow | RAG, chains, and agent prototypes |
| Vector search | Qdrant, Weaviate | Document search and a company knowledge base |
| LLM observability | Langfuse | Tracing, quality evaluation, and request cost |
A local interface does not automatically make a model safe: check where the request goes, where the logs are stored, who can see the history, and whether data can be deleted. If external APIs are used, the content still leaves your server.
What stack to deploy on a single VPS
You do not need to spin up 100 projects. For a company that urgently needs a working crisis-response setup, 8–10 services are enough.
| Function | Core choice | Lightweight alternative |
|---|---|---|
| CRM | Twenty | Frappe CRM |
| Marketing email campaigns | listmonk | Keila |
| Web analytics | Umami | Plausible CE |
| BI | Metabase | Redash |
| Projects | Vikunja | Kanboard |
| Files | Nextcloud | Seafile Community |
| Support | FreeScout | osTicket |
| Passwords | Vaultwarden | Passbolt CE |
| Automation | Activepieces or Node-RED | Automatisch |
| Monitoring and backup | Uptime Kuma + Restic | Zabbix + BorgBackup |
Pilot sizing: 4–8 vCPU, 16–32 GB RAM, and 200 GB+ SSD can be a starting configuration for a team of roughly up to 20–30 people under moderate load. This is an estimate, not a measured benchmark: Twenty, BI queries, file indexing, and email campaigns create very different peaks. Before production, run a load test and measure CPU, RAM, IOPS, database size, and recovery time.
A single VPS is a way to quickly validate a hypothesis, not an ideal end-state architecture. A minimal setup looks like this:
- Ubuntu LTS or another supported Linux distribution.
- Docker Compose for services and pinned image versions.
- Caddy or Traefik as a reverse proxy with TLS.
- PostgreSQL and Valkey only on the internal container network.
- Keycloak or Authelia for single sign-on, where supported.
- Restic with an encrypted copy in independent storage.
- Uptime Kuma, Prometheus/Grafana, or Zabbix for monitoring.
- Automatic OS security updates and scheduled application updates.
Critical point: a backup on the same VPS is not a real backup. Keep at least one copy off the server and regularly test restores.
How to migrate without interrupting sales
Step 1. Count processes, not products
Create an inventory: CRM, telephony, forms, email, analytics, projects, documents, chats, finance, HR, and access. For each system, note the owner, users, cost, data volume, integrations, required retention period, and export method.
Step 2. Eliminate duplication
Companies often pay for tasks in Bitrix24, a separate task tracker, and spreadsheets; for reporting in CRM, BI, and manual rollups; and for multiple file storage systems. The fastest savings come not from replacing three products with three free ones, but from keeping one process and one source of truth.
Step 3. Choose a reversible pilot
A good pilot is limited to one team, one funnel, or one type of inquiry. It has a start date, an owner, success criteria, and a way to roll back.
Step 4. Run a test import
Migrate a copy of the data, not the original. Check encodings, phone numbers, email addresses, contact–company–deal relationships, owners, custom fields, files, and history. Check deduplication separately.
Step 5. Rebuild automations
Do not copy bots mechanically. Describe each rule as “event → condition → action → error → owner.” Then implement it in the CRM, Activepieces, Node-RED, or a custom service and add an execution log.
Step 6. Run a parallel period
For one to two weeks, the team works in the new system while the old one is kept for reconciliation. Compare the number of new leads, missed events, response time, duplicates, sent emails, and conversion by stage.
Step 7. Lock in operations
Before shutting down the old SaaS, the following must be assigned:
- product owner;
- administrator and backup administrator;
- update schedule;
- access and MFA setup;
- backup and restore verification;
- change log;
- incident response time;
- export in an open format in case of a future migration.
Where open source should not be implemented blindly
Regulated accounting
Accounting, taxes, HR documents, cash register, and product labeling depend on Russian law and data exchange formats. An open source ERP can manage operations, but that does not prove compliance with mandatory requirements. Verification should be done by a specialized accountant, lawyer, or integrator.
Personal data
Having your own server does not automatically mean compliance with Federal Law No. 152-FZ. What matters is where data is processed, the legal basis, consents, contractor agreements, threat model, access controls, logs, retention periods, and data deletion.
Telephony, email, and messengers
In these systems, the license price is only part of TCO. There are numbers, traffic, deliverability, anti-spam, call recordings, storage, and support. Sometimes a managed service costs less than hiring your own administrator.
Projects with an open-core model
Make sure the SSO, audit, roles, backup, or API features you need are available in the free edition. Do not design a process around a feature that turns out to be an enterprise module after installation.
Abandoned repositories
Check the date of the last release, security policy, known vulnerabilities, documentation quality, Docker image, and the ability to export data. A large number of stars does not replace ongoing maintenance.
How to calculate savings
Compare total cost of ownership, not subscription price versus zero.
| Article | SaaS | Self-hosted open source |
|---|---|---|
| Licenses | Per user, module, or volume | Usually 0 for the free edition |
| Server | Included | VPS, disks, traffic, external backups |
| Implementation | Setup and integrator | Configuration, migration, customization, testing |
| Updates | Handled by the vendor | Handled by your team or a contractor |
| Support | By plan | Internal, community, or paid partner |
| Dependency risk | Plans, limits, closed export | In-house expertise and project quality |
| Customization | Within the API and marketplace | You can modify the code within the limits of the license |
The formula is simple:
TCO for self-hosted = VPS + backups + implementation + maintenance + updates + incidents + internal time cost.
Savings appear when ongoing payments for users and modules are higher than operating costs, and the processes are standard enough or the company can support customizations. For a team of five, a low-cost SaaS may win. For dozens of users, several systems, and an in-house technical specialist, a self-hosted environment is often more cost-effective — but that is a hypothesis that must be tested against your own numbers.
Frequently asked questions
Can amoCRM and Bitrix24 be replaced for free?
Yes, the license portion of a CRM can be replaced with Twenty, Frappe CRM, SuiteCRM, ERPNext, or Dolibarr. But telephony, email, automations, integrations, and history need to be migrated separately, and the server and maintenance remain paid items.
Are Twainty CRM and Twenty CRM the same thing?
In the context of open source CRM, the reference is to Twenty. The spelling Twainty is a common phonetic mistake. The official project and documentation use the name Twenty.
Can the whole stack be deployed on one VPS?
A compact pilot stack of CRM, email campaigns, analytics, tasks, files, help desk, passwords, and monitoring can. Running all 100+ options at once is neither necessary nor reasonable. For production, resources and server separation are determined after measuring load and high-availability requirements.
Is open source really free for business?
The free edition usually does not require a license fee, but the terms of the specific license are binding. Hosting, implementation, customization, updates, security, and support cost money.
What should you choose instead of Power BI?
Metabase is easier for a quick start and for asking questions about business data. Apache Superset is a better fit for more complex BI visualizations and analytics teams. Redash is convenient for SQL queries and lightweight dashboards.
What can replace Yandex Metrika and Google Analytics?
Matomo offers the broadest classic web analytics feature set. Umami and Plausible CE are simpler and lighter for basic pageviews, traffic sources, and events. For product funnels, look at PostHog or Countly Community.
Do you need a programmer?
For a pilot with Docker and well-documented projects, a systems administrator may be enough. For CRM migration, integrations, SSO, monitoring, and regular updates, you need a responsible technical specialist — in-house or external.
Where should you start today?
Export a list of all paid systems and invoices for the last three months, choose one expensive feature with no critical regulatory requirements, and run a two-week parallel pilot. For example: one sales funnel in Twenty, email campaigns in listmonk, and a dashboard in Metabase.
Conclusion
An anti-crisis stack is not a "free Bitrix on a VPS" and not a collection of Docker containers. It is a managed transition from subscriptions and closed data to an open stack where the company controls the code, export, integrations, and pace of customization.
Start with three things: Twenty or another open source CRM for one funnel, Umami/Matomo for analytics, and Metabase for reporting. Add external backup, monitoring, and someone responsible for updates. If the pilot preserves data, processes, and team speed, move the next function. That is how license costs go down without stopping the business or creating a new dependency on a single vendor.