Novu is open-source communication infrastructure for your product and your AI agents. Novu Notify lets you trigger one workflow that routes across in-app Inbox, email, SMS, push, and chat, with digests, delays, and user preferences built in. Novu Connect plugs AI agents into Slack, WhatsApp, Teams, Telegram, and email with conversation state and human approval. Use Novu Cloud or self-host, and start free with 10,000 workflow runs a month.

• Embeddable Inbox Component: Add a prebuilt, real-time in-app inbox to your React, Next.js, or Remix app. It ships with unread counts, tabs, filters, snoozing, localization, and custom styling.
• Multi-Channel Workflows: One trigger routes a notification across Inbox, email, SMS, push, and chat. You can add conditions, delays, and fallbacks so messages reach users on the right channel.
• Digests and Rate Limits: Bundle many events into a single summary and cap how often each user gets messaged. Your users see fewer, more useful notifications.
• User Preferences: Let your users choose what they receive, when, and where. Quiet hours and snooze are included.
• Novu Connect for AI Agents: Connect an agent built with LangChain, Vercel AI SDK, Chat SDK, custom code, or a Claude Managed Agent to Slack, WhatsApp, Teams, Telegram, and email. Each message carries full conversation history and state, so your agent doesn't need its own session store.
• Human-in-the-Loop Approval: Require a person to approve an agent action, such as a refund or an MCP tool call, before it runs. Approval happens inside the conversation.
• Code-First Framework and SDKs: Define workflows as code with the Novu Framework. Server SDKs cover TypeScript, Python, Go, PHP, .NET, Java, Kotlin, Laravel, and Ruby, alongside a REST API.
• Flexible Deployment and Compliance: Run on Novu Cloud with US or EU data residency, or self-host on your own infrastructure. Novu lists SOC 2 Type II, ISO 27001, GDPR, and HIPAA compliance.

• Open Source with a Self-Hosting Path: You can inspect the code, contribute, and run Novu inside your own infrastructure. That is rare among notification platforms, most of which are SaaS-only.
• Fast Setup: Reviewers on G2 point to straightforward APIs and helpful documentation. The drop-in Inbox component means you can ship in-app notifications quickly.
• Generous Free Tier: The free plan includes 10,000 workflow runs a month across every channel, with no credit card required.
• Run-Based Billing: A single trigger that fans out to email, push, and in-app counts as one workflow run. Per-message pricing would count it three times, so costs stay easier to predict.
• Wide Language Support: Server SDKs cover nine languages and frameworks, so most backend teams can integrate without writing raw HTTP calls.
• One Platform for Notifications and Agents: Notify and Connect run on the same engine. You can handle product alerts and two-way AI agent conversations without adding a second vendor.

• Built for Developers: You set up workflows through code, SDKs, and a CLI. Teams without engineering resources will find it harder to adopt than no-code messaging tools.
• Product Notifications, Not Marketing Campaigns: Novu focuses on transactional and product messaging. If you also need marketing journeys or campaign tools, platforms like Courier cover both in one product.
• Tight Free-Tier Limits: The free plan caps you at 20 workflows, 3 team members, 2 environments, and 24-hour activity feed retention. Debugging older deliveries or adding more teammates requires a paid plan.
• Enterprise Features Gated: SSO (SAML/OIDC), SCIM, HIPAA BAA, custom retention, extra data residency regions, and supported self-hosting with SLAs are only available on the custom-priced Enterprise plan.
• Connect Channels Still Expanding: Novu Connect currently supports Slack, WhatsApp, email, Telegram, and Microsoft Teams. Google Chat, iMessage, Discord, Linear, Zoom, Messenger, and GitHub are listed as coming soon.

• SaaS In-App Notification Center: A B2B SaaS team embeds the Novu Inbox to show comments, mentions, and status updates in real time. Users manage their own preferences, so support gets fewer "too many emails" tickets.
• Multi-Channel Transactional Alerts: An e-commerce app triggers one workflow for order updates. Novu sends an in-app notice first and falls back to email or SMS if the user hasn't seen it.
• Activity Digests: A collaboration tool batches dozens of daily events into a single digest email per user. Rate limits keep busy accounts from flooding inboxes.
• AI Support Agent on WhatsApp and Slack: A team connects its LangChain or Vercel AI SDK agent through Novu Connect. Customers chat on WhatsApp or Slack, and the agent keeps full conversation context without a custom session store.
• Approval-Gated Agent Actions: A fintech or support team lets an agent draft refunds, but each refund needs a human to approve it in the conversation first. That keeps sensitive actions under control.
• Regulated or Data-Sensitive Deployments: A healthcare or enterprise company self-hosts Novu in its private cloud, or uses Enterprise with HIPAA BAA and regional data residency, to keep notification data under its own control.