Open source
Open-source alternatives worth self-hosting
Open source swaps a subscription for maintenance. These projects genuinely replace their commercial counterparts — but only if someone on your side will own updates, backups and security patches. If nobody will, pay for the hosted product; it is cheaper than an outage.
By category
31 roundups, each comparing the projects in one category against the commercial products they replace.
Open-source AI agent frameworks
DSPy, LlamaIndex, CrewAI
Open-source notes & knowledge
Joplin, Logseq, Standard Notes
Open-source project management
OpenProject, Plane, Taiga
Open-source AI coding assistants
Cline, Continue, Aider
Open-source monitoring & observability
Grafana, Prometheus, SigNoz
Open-source vector databases
Weaviate, Qdrant, Chroma
Open-source containers & runtimes
Podman, containerd, Incus
Open-source identity & SSO
Keycloak, Authentik, Zitadel
Open-source LLM gateways & observability
LiteLLM, Langfuse, Helicone
Open-source local LLM runners
Ollama, llama.cpp, vLLM
Open-source no-code databases
NocoDB, Baserow, Grist
Open-source BI & dashboards
Metabase, Apache Superset, Redash
Open-source cloud storage & file sync
Nextcloud, Seafile, ownCloud
Open-source CRM & sales
Twenty, EspoCRM, SuiteCRM
Open-source e-commerce
Medusa, Saleor, WooCommerce
Open-source graphics & photo editing
GIMP, Krita, Inkscape
Open-source helpdesk & ticketing
osTicket, FreeScout, Zammad
Open-source hosting & PaaS
Coolify, Dokku, CapRover
Open-source password managers
Bitwarden, Vaultwarden, KeePassXC
Open-source team chat
Mattermost, Rocket.Chat, Zulip
Open-source web analytics
Plausible, Umami, Matomo
Open-source workflow automation
n8n, Activepieces, Windmill
Open-source accounting & invoicing
Akaunting, Invoice Ninja, Firefly III
Open-source AI chat assistants
Open WebUI, LibreChat, HuggingChat
Open-source AI image generation
ComfyUI, InvokeAI, Fooocus
Open-source AI voice, speech & music
Whisper, Coqui TTS, Piper
Open-source API clients
Bruno, Insomnia, Hoppscotch
Open-source CMS & site builders
Ghost, Strapi, Payload
Open-source design & whiteboards
Penpot, Excalidraw, tldraw
Open-source git hosting
GitLab, Gitea, Forgejo
Open-source website builders
Astro, Hugo, Publii
Every project we track
| Project | What it is | Replaces | Source |
|---|---|---|---|
| Nextcloud | Self-hosted file sync, calendar and collaboration suite. | Dropbox Google Drive | repo ↗ |
| Seafile | Self-hosted file sync focused on speed and reliability. | Dropbox | repo ↗ |
| ownCloud | The original self-hosted file-sync platform Nextcloud forked from. | Dropbox | repo ↗ |
| File Browser | Minimal self-hosted web file manager for a single server. | Dropbox | repo ↗ |
| osTicket | Long-running open-source support ticket system. | Zendesk Freshdesk | repo ↗ |
| FreeScout | Self-hosted shared inbox and helpdesk, a Help Scout alternative. | Help Scout Zendesk | repo ↗ |
| Zammad | Open-source helpdesk with strong multi-channel support. | Zendesk | repo ↗ |
| Chatwoot | Open-source customer engagement and live chat suite. | Intercom Zendesk | repo ↗ |
| Bitwarden | Open-source, audited password manager with a usable free tier. | 1Password LastPass | repo ↗ |
| Vaultwarden | Lightweight self-hosted server compatible with Bitwarden clients. | 1Password LastPass | repo ↗ |
| KeePassXC | Fully offline encrypted vault stored as a local file. | 1Password LastPass | repo ↗ |
| Passbolt | Open-source password manager built for team sharing. | 1Password | repo ↗ |
| Akaunting | Self-hosted open-source accounting with a modular design. | QuickBooks | repo ↗ |
| Invoice Ninja | Open-source invoicing, quotes and payments platform. | QuickBooks freshbooks | repo ↗ |
| Firefly III | Self-hosted personal finance manager and budgeting tool. | QuickBooks | repo ↗ |
| Twenty | Modern open-source CRM built as a Salesforce alternative. | Salesforce HubSpot | repo ↗ |
| EspoCRM | Mature open-source CRM that is quick to self-host. | Salesforce | repo ↗ |
| SuiteCRM | Long-established open-source CRM forked from SugarCRM. | Salesforce | repo ↗ |
| Odoo | Open-source business suite covering CRM, ERP and more. | Salesforce | repo ↗ |
| n8n | Self-hostable workflow automation with code steps built in. | Zapier make | repo ↗ |
| Activepieces | Open-source automation that is friendlier than n8n. | Zapier | repo ↗ |
| Windmill | Open-source platform turning scripts into workflows and UIs. | Zapier Retool | repo ↗ |
| Node-RED | Flow-based programming, popular for IoT and event wiring. | Zapier | repo ↗ |
| Grafana | The open-source standard for dashboards and visualisation. | Datadog | repo ↗ |
| Prometheus | Open-source metrics collection and alerting, the CNCF standard. | Datadog | repo ↗ |
| SigNoz | Open-source metrics, traces and logs in a single product. | Datadog New Relic | repo ↗ |
| Uptime Kuma | Self-hosted uptime monitoring with a very clean interface. | Datadog Pingdom | repo ↗ |
| Netdata | Real-time infrastructure monitoring with per-second resolution. | Datadog | repo ↗ |
| Zabbix | Enterprise-grade open-source infrastructure monitoring. | Datadog | repo ↗ |
| Mattermost | Self-hosted team chat that closely mirrors Slack. | Slack | repo ↗ |
| Rocket.Chat | Open-source team chat plus customer-facing livechat. | Slack Intercom | repo ↗ |
| Zulip | Topic-threaded chat that stays readable at scale. | Slack | repo ↗ |
| Element | Matrix-based secure chat with federation and E2E encryption. | Slack | repo ↗ |
| OpenProject | Open-source project management with Gantt and portfolio views. | Jira Monday.com | repo ↗ |
| Plane | Modern open-source issue tracking, a Jira and Linear alternative. | Jira Linear | repo ↗ |
| Taiga | Open-source agile project management for scrum and kanban. | Jira | repo ↗ |
| Vikunja | Self-hosted task management with list, kanban and gantt views. | Asana Trello | repo ↗ |
| Wekan | Open-source kanban board you can host yourself. | Trello | repo ↗ |
| Joplin | Open-source notes with encrypted sync and Evernote import. | Evernote | repo ↗ |
| Logseq | Outliner-style local-first knowledge base. | Notion Evernote | repo ↗ |
| Standard Notes | End-to-end encrypted notes on every tier. | Evernote | repo ↗ |
| AppFlowy | Open-source Notion alternative, local-first by design. | Notion | repo ↗ |
| Anytype | Local-first encrypted workspace and knowledge graph. | Notion | repo ↗ |
| Outline | Team wiki and knowledge base you can self-host. | Confluence Notion | repo ↗ |
| Trilium Notes | Hierarchical note-taking for building personal knowledge bases. | Evernote | repo ↗ |
| NocoDB | Turns an existing Postgres or MySQL database into a spreadsheet UI. | Airtable | repo ↗ |
| Baserow | Open-source Airtable alternative with unlimited self-hosted users. | Airtable | repo ↗ |
| Grist | Spreadsheet-database hybrid with real Python formulas. | Airtable | repo ↗ |
| Teable | Postgres-backed no-code database with an Airtable-like interface. | Airtable | repo ↗ |
| Directus | Open-source data platform and headless CMS over any SQL database. | Airtable Contentful | repo ↗ |
| Formbricks | Open-source surveys built for in-product research. | Typeform SurveyMonkey | repo ↗ |
| LimeSurvey | Long-established open-source survey platform. | SurveyMonkey | repo ↗ |
| Cal.com | Open-source scheduling that can be self-hosted and white-labelled. | Calendly | repo ↗ |
| Easy!Appointments | Self-hosted appointment booking for service businesses. | Calendly | repo ↗ |
| Documenso | Open-source e-signature platform you can self-host. | DocuSign | repo ↗ |
| Bruno | Offline API client storing collections as files in your repo. | Postman | repo ↗ |
| Insomnia | Polished API client with strong GraphQL and gRPC support. | Postman | repo ↗ |
| Hoppscotch | Browser-based API client that can be self-hosted. | Postman | repo ↗ |
| Keycloak | The open-source standard for self-hosted SSO, backed by Red Hat. | Okta Auth0 | repo ↗ |
| Authentik | Modern self-hosted identity provider, friendlier than Keycloak. | Okta Auth0 | repo ↗ |
| Zitadel | Open-source identity with multi-tenancy and a managed cloud. | Okta Auth0 | repo ↗ |
| SuperTokens | Open-source authentication built for developers to embed. | Auth0 | repo ↗ |
| Ory | Open-source identity and access infrastructure. | Auth0 Okta | repo ↗ |
| Coolify | Self-hosted PaaS — git-push deploys on your own VPS. | Heroku Vercel | repo ↗ |
| Dokku | Minimal self-hosted PaaS built on Docker. | Heroku | repo ↗ |
| CapRover | Self-hosted PaaS with a web UI and one-click apps. | Heroku | repo ↗ |
| Listmonk | Self-hosted newsletter and mailing-list manager, very fast. | Mailchimp | repo ↗ |
| Mautic | Open-source marketing automation platform. | HubSpot Mailchimp | repo ↗ |
| Plausible | Privacy-friendly, cookie-free web analytics. | Google Analytics | repo ↗ |
| Umami | Lightweight self-hosted web analytics. | Google Analytics | repo ↗ |
| Matomo | Full-featured analytics you can host yourself. | Google Analytics | repo ↗ |
| PostHog | Product analytics, session replay and feature flags. | Google Analytics Amplitude | repo ↗ |
| Penpot | Open-source design and prototyping platform, a Figma alternative. | Figma | repo ↗ |
| Excalidraw | Hand-drawn style virtual whiteboard, self-hostable. | Miro Figma | repo ↗ |
| tldraw | Infinite canvas whiteboard you can embed in your own product. | Miro | repo ↗ |
| Ghost | Publishing platform with newsletters and memberships built in. | WordPress Squarespace | repo ↗ |
| Strapi | Open-source headless CMS with a customisable admin. | WordPress Contentful | repo ↗ |
| Payload | TypeScript-native headless CMS and application framework. | WordPress Contentful | repo ↗ |
| Metabase | Open-source BI that non-technical people actually use. | Tableau Looker | repo ↗ |
| Apache Superset | Open-source data exploration and dashboarding at scale. | Tableau Power BI | repo ↗ |
| Redash | Query, visualise and share results from any data source. | Tableau | repo ↗ |
| Lightdash | Open-source BI built on top of your dbt project. | Looker | repo ↗ |
| Cap | Open-source screen recorder and Loom alternative. | Loom | repo ↗ |
| OpenRefine | Powerful open-source desktop tool for cleaning and reconciling messy data. | — | repo ↗ |
| Medusa | Open-source commerce engine for custom storefronts. | Shopify | repo ↗ |
| Saleor | GraphQL-first open-source commerce platform. | Shopify | repo ↗ |
| WooCommerce | The WordPress commerce plugin, self-hosted and extensible. | Shopify | repo ↗ |
| Snipe-IT | Open-source asset and equipment tracking with check-in/check-out. | fleetio | repo ↗ |
| Postiz | Open-source scheduling you can self-host, with an AI assist. | Hootsuite buffer | repo ↗ |
| Mixpost | Self-hosted social scheduling with no per-post limits. | Hootsuite buffer | repo ↗ |
| BookStack | Self-hosted documentation wiki organised into books and chapters. | Confluence Notion | repo ↗ |
| DSPy | Programs prompts as modules you compile rather than hand-tune. | LangChain | repo ↗ |
| Coder | Self-hosted cloud development environments on your own infra. | Replit | repo ↗ |
| GIMP | The long-standing free photo editor; deep, but its own way of working. | Adobe Photoshop | repo ↗ |
| Krita | Open-source painting and illustration, built by and for digital artists. | Adobe Photoshop | repo ↗ |
| Inkscape | Open-source vector illustration, the usual Illustrator replacement. | Adobe Creative Cloud | repo ↗ |
| Scribus | Open-source desktop publishing for print-ready layouts. | Adobe Creative Cloud | repo ↗ |
| Jitsi Meet | Open-source video meetings you can self-host, no account needed. | Zoom | repo ↗ |
| BigBlueButton | Open-source conferencing built specifically for teaching. | Zoom | repo ↗ |
| GitLab | Repos, CI and issues in one platform, self-hostable. | GitHub | repo ↗ |
| Gitea | Lightweight self-hosted Git that runs on very little. | GitHub | repo ↗ |
| Forgejo | Community-governed fork of Gitea, the engine behind Codeberg. | GitHub | repo ↗ |
| GLPI | Open-source asset management and service desk, self-hosted. | ServiceNow | repo ↗ |
| Podman | Daemonless, rootless containers with a Docker-compatible CLI. | Docker | repo ↗ |
| containerd | The runtime Docker and Kubernetes actually use underneath. | Docker | repo ↗ |
| Incus | System containers and VMs; a community fork of LXD. | Docker | repo ↗ |
| Buildah | Builds OCI images without a daemon or a Dockerfile. | Docker | repo ↗ |
| Colima | Container runtimes on macOS without Docker Desktop's licence. | Docker | repo ↗ |
| Astro | Static-first framework that ships almost no JavaScript. | WordPress | repo ↗ |
| Hugo | Extremely fast static site generator for content sites. | WordPress | repo ↗ |
| Publii | Desktop static-site CMS that publishes to any host. | WordPress | repo ↗ |
| Planka | Open-source kanban that looks and works like Trello. | Trello | repo ↗ |
| Wekan | Open-source kanban boards, self-hosted. | Trello | repo ↗ |
| ClickHouse | Extremely fast open-source columnar database for analytics. | Snowflake | repo ↗ |
| DuckDB | An analytics database that runs in-process, no server at all. | Snowflake | repo ↗ |
| Shopware | Open-source commerce with strong B2B capability. | Shopify | repo ↗ |
| Open WebUI | Self-hosted chat interface for Ollama and any OpenAI-compatible API. | ChatGPT | repo ↗ |
| LibreChat | Self-hosted multi-model chat with users, roles and conversation search. | ChatGPT | repo ↗ |
| HuggingChat | Hugging Face's open chat UI running open-weight models. | ChatGPT | repo ↗ |
| Cline | Autonomous coding agent inside VS Code, bring your own key. | GitHub Copilot Cursor | repo ↗ |
| Continue | Open-source IDE assistant you point at any model. | GitHub Copilot | repo ↗ |
| Aider | Pair programming in the terminal that commits as it goes. | GitHub Copilot Cursor | repo ↗ |
| Zed | A fast native editor with collaboration and agents built in. | Cursor | repo ↗ |
| OpenHands | Agents that run the whole loop: edit, run, test, fix. | Cursor GitHub Copilot | repo ↗ |
| Goose | Block's local coding agent, extensible over MCP. | Cursor | repo ↗ |
| ComfyUI | Node-graph interface for running diffusion models locally. | Midjourney Stable Diffusion | repo ↗ |
| InvokeAI | A polished local Stable Diffusion studio with a real UI. | Midjourney Stable Diffusion | repo ↗ |
| Fooocus | Local generation tuned so you only write a prompt. | Midjourney | repo ↗ |
| Whisper | OpenAI's speech recognition model, free to run yourself. | Otter.ai | repo ↗ |
| Coqui TTS | A deep-learning speech toolkit you host yourself. | ElevenLabs | repo ↗ |
| Piper | Fast local neural text-to-speech, small enough for a Pi. | ElevenLabs | repo ↗ |
| LanguageTool | Open-source grammar checking in 30+ languages, self-hostable. | Grammarly | repo ↗ |
| SearXNG | Self-hosted metasearch that profiles nobody. | Perplexity | repo ↗ |
| Perplexica | An open-source answer engine you can run at home. | Perplexity | repo ↗ |
| LlamaIndex | Data framework for connecting models to your own documents. | LangChain | repo ↗ |
| CrewAI | Role-playing agents that co-operate on a task. | LangChain | repo ↗ |
| AutoGen | Microsoft's framework for multi-agent conversations. | LangChain | repo ↗ |
| Dify | Visual builder for LLM apps, self-hostable. | LangChain | repo ↗ |
| Flowise | Drag-and-drop LLM flows on top of LangChain. | LangChain | repo ↗ |
| Langflow | Visual authoring for agents and RAG pipelines. | LangChain | repo ↗ |
| Haystack | Production search and RAG pipelines from deepset. | LangChain | repo ↗ |
| Pydantic AI | Type-safe agents from the Pydantic team. | LangChain | repo ↗ |
| Mastra | TypeScript agent framework with workflows and evals. | LangChain | repo ↗ |
| Weaviate | Open-source vector database with hybrid search. | Pinecone | repo ↗ |
| Qdrant | Rust vector database built for filtered search at scale. | Pinecone | repo ↗ |
| Chroma | The embedding database that starts as an import. | Pinecone | repo ↗ |
| Milvus | Distributed vector database for billion-scale collections. | Pinecone | repo ↗ |
| pgvector | Vector search inside the Postgres you already run. | Pinecone | repo ↗ |
| LanceDB | Embedded vector store that works straight off object storage. | Pinecone | repo ↗ |
| LiteLLM | Self-hosted proxy giving every provider an OpenAI-shaped API. | OpenAI API | repo ↗ |
| Langfuse | Open-source tracing, evals and prompt management. | LangChain | repo ↗ |
| Helicone | Observability and caching that sits in front of your calls. | LangChain | repo ↗ |
| Portkey | AI gateway with routing, fallbacks and guardrails. | OpenAI API | repo ↗ |
| Phoenix | Open-source tracing and evaluation for LLM apps. | LangChain | repo ↗ |
| Ollama | Run open-weight models locally with one command. | ChatGPT OpenAI API | repo ↗ |
| llama.cpp | The C++ inference engine most local tooling is built on. | OpenAI API | repo ↗ |
| vLLM | High-throughput serving for your own GPUs. | OpenAI API | repo ↗ |
| Jan | An offline ChatGPT-style desktop app. | ChatGPT | repo ↗ |
| GPT4All | Local models on ordinary laptops, no GPU required. | ChatGPT | repo ↗ |
| Marp | Decks written in Markdown, versioned like code. | Gamma | repo ↗ |
Dropbox 
Google Drive 
Zendesk 
Freshdesk 
Help Scout 
Intercom 
1Password 
LastPass 
QuickBooks 
freshbooks 
Salesforce 
HubSpot 
Zapier 
make 
Retool 
Datadog 
New Relic 
Pingdom 
Slack 
Jira 
Monday.com 
Linear 
Asana 
Trello 
Evernote 
Notion 
Confluence 
Airtable 
Contentful 
Typeform 
SurveyMonkey 
Calendly 
DocuSign 
Postman 
Okta 
Auth0 
Heroku 
Vercel 
Mailchimp 
Google Analytics 
Amplitude 
Figma 
Miro 
WordPress 
Squarespace 
Tableau 
Looker 
Power BI 
Loom 
Shopify 
Hootsuite 
buffer 
LangChain 
Replit 
Adobe Photoshop 
Adobe Creative Cloud 
Zoom 
GitHub 
ServiceNow 
Docker 
Snowflake 
ChatGPT 
GitHub Copilot 
Cursor 
Stable Diffusion 
Otter.ai 
ElevenLabs 
Grammarly 
Perplexity 
Pinecone 
OpenAI API 
Gamma The maintenance tax nobody mentions
- Server cost is the small part — your time is the expensive part
- Security patching stops being optional once the service faces the internet
- Backups you have never restored from are not backups
We list open-source options because they are often the right answer. We say this because they are not always the right answer.
Questions people actually ask
Are open-source alternatives really free?
The software is free; running it is not. Self-hosting costs a server — roughly $5–20 a month for most of these — plus your own time for updates, backups and security patches. That is the honest trade: you swap a subscription for maintenance work.
Which open-source alternatives are production-ready?
The projects listed here are established with active development. The realistic test is not features but operations: if nobody on your team wants to own updates and backups, a hosted product is the better answer even at a higher price.
Can I self-host without a sysadmin?
For several of these, yes. Managed hosting providers will run the same open-source software for you for a monthly fee, which keeps the data-ownership benefit without the maintenance burden — at that point you are comparing their price against the commercial product's.
What is the best open-source ticketing system?
osTicket and FreeScout are the two most commonly deployed. osTicket is the older, heavier option with more configuration; FreeScout behaves like a shared inbox and is closer to Help Scout in feel. Both replace the core of a paid helpdesk for the cost of a small server.