Open-source live customer chat and messaging
Papercups is an open-source customer messaging platform that combines a lightweight live chat widget with a shared inbox and developer APIs. Teams use it to run support and sales conversations directly inside their web product, centralize messages across channels, and automate tasks with webhooks and integrations.
Lightweight, customizable chat widget for React, React Native, and Flutter applications
Centralized inbox where teammates can claim and respond to conversations with internal notes
Reply to customer messages directly from Slack without switching between apps
Reply from email or forward Twilio SMS conversations into the unified inbox
REST and WebSocket APIs for custom integrations, automations, and chatbot workflows
Full open-source codebase in Elixir that can be self-hosted for complete data control
Rich message formatting with markdown syntax and emoji support in conversations
Embed live chat on your product for real-time customer support without expensive SaaS fees
Build custom chat experiences using APIs and webhooks for technically-oriented teams
Self-host the entire platform to maintain complete control over customer data
Engage website visitors with proactive chat to convert leads into customers
Best developer-first chat platform — API-driven architecture with React/Flutter SDKs for teams that want to build custom support experiences, though maintenance-mode status means evaluating long-term needs carefully
Best for developer-focused teams who need a simple, stable live chat widget and nothing more — but go in with eyes open about the maintenance-mode reality and plan a migration path if your needs grow.
Connect with Mattermost for team-based customer message management

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