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ChatwootCustomer SupportChatwoot is an open-core customer support platform: a shared inbox for website chat, email, WhatsApp, Instagram, Telegram, SMS and voice, plus help center, contacts, reports and an AI agent. Self-host it with Docker, Helm or a Linux script, or use Chatwoot Cloud.Open sourceSelf-hostedFreemium
DEV CommunityTutorials & CoursesDEV Community (dev.to) is a community of software developers who publish Markdown articles, comment, follow tags and join writing and hackathon challenges. It runs on Forem, the AGPL-3.0 Ruby on Rails community platform that others can deploy for their own communities.Open sourceSelf-hostedFree
DiscourseBlogs & CommunityDiscourse is a GPL-2.0 community platform built on Ruby on Rails and Ember.js. It offers topics, built-in chat, moderation tools, plugins and an API, and can be self-hosted with Docker or run on official hosting plans.Open sourceSelf-hostedFreemium
DocuSealPDF & Document ToolsDocuSeal is an AGPL-3.0 platform for building fillable PDF forms and collecting e-signatures, with SMTP email, S3 storage, API, webhooks and mobile apps, available self-hosted with Docker or as DocuSeal Cloud with a Pro plan.Open sourceSelf-hostedFreemium
GumroadPayments & FintechGumroad lets creators sell digital products, memberships and courses with built-in checkout, affiliates, payouts and a v2 API. The web application source is MIT licensed; selling runs on gumroad.com, not on a documented self-host path.Open sourceWeb platformPaid
MastodonBlogs & CommunityMastodon is free, open-source social network server software. Each server runs its own community and moderation rules, and federates with other Mastodon and ActivityPub servers. It runs on Rails, PostgreSQL, Redis and Node.js.Open sourceSelf-hosted
Maybe FinanceAccounting & InvoicingSelf-hosted Ruby on Rails app for tracking net worth, accounts, budgets, investments and transactions, with CSV imports, rules, an API and optional AI chat. AGPLv3; archived at the final v0.6.0 release in July 2025.Open sourceSelf-hosted
ONCE CampfireTeam Chat & MeetingsRails group chat you run on your own server with Docker or the ONCE installer. It has rooms with access controls, direct messages, file attachments, search, Web Push, @mentions and a bot API, with no subscription.Open sourceSelf-hosted
OpenProjectProject ManagementOpenProject is open-source project management software from OpenProject GmbH in Berlin. It combines work packages, Gantt charts, boards, Scrum backlogs, time and budgets, wikis and meetings. Self-host the free Community edition or use the paid Enterprise cloud.Open sourceSelf-hostedFreemium
PostalAPIs & IntegrationsPostal is an MIT-licensed mail server for web applications. It sends over SMTP or an HTTP API, routes incoming mail to HTTP or SMTP endpoints, signs with DKIM and logs deliveries, opens and clicks. It runs in Docker with MariaDB on your own servers.Open sourceSelf-hosted
Spree CommerceERP & Business SuitesSpree Commerce is a BSD 3-Clause commerce platform on Ruby on Rails for DTC, B2B, marketplaces and cross-border selling, with REST APIs, TypeScript SDKs, a React admin, a Next.js storefront and a paid Enterprise Edition.Open sourceSelf-hostedFreemium
SureAccounting & InvoicingSure is a community-maintained AGPLv3 fork of Maybe Finance: a Ruby on Rails app for accounts, budgets, bills, loans and investments, self-hosted with Docker or Helm, with optional bank sync, AI chat, an API and an MCP endpoint.Open sourceSelf-hosted