Open-source Vero alternatives

Plunk is an open-source email platform that combines transactional email, marketing campaigns and workflow automation in a single product. Developers can send messages from an API with templates and variable substitution, or use Plunk as an SMTP relay so that existing tools and frameworks can send through it.

Marketing features include campaigns for newsletters and product updates, dynamic segments, and contact management with custom fields and activity history. Workflows add triggers, delays and conditional logic, analytics track opens, clicks and bounces, custom domains are verified with DKIM and SPF, and inbound emails can be received and routed with custom rules.

Plunk is positioned as an open-source, self-hosted alternative to services such as SendGrid, Resend and Mailgun. It is licensed under AGPL-3.0, written in TypeScript, and can be deployed from an official Docker image following the project's documentation. The README cites a rate of $0.001 per email with no contact limits.

Laudspeaker is an open-source customer engagement and product onboarding platform. It was positioned as an alternative to tools such as Braze, OneSignal, Customer.io, Appcues and Pendo, and lets teams design product onboarding flows and send messages triggered by product events across several channels.

Its main features were a visual journey builder for complex workflows, a segment builder that targets users by attributes, completed actions and previous campaigns, multiple channels including push, email, SMS and webhooks, and A/B tests and personalization with Liquid templating and external API calls. It was built with NestJS, React and TypeScript, and planned to integrate with data warehouses and the modern data stack.

The README now states that Laudspeaker is no longer under active development or being supported. It mentions a Laudspeaker Cloud and a paid self-deployed enterprise plan, though availability is uncertain given that notice. The repository lists its licence as other. Anyone considering it should treat it as an archived project and check current status before building on it.

Dittofeed is an omni-channel customer engagement platform. Teams use it to send one-off broadcasts or build automated, event-driven user journeys that reach people by email, mobile push notifications, SMS, WhatsApp, Slack and other channels. The project positions itself as a developer-friendly, open-source alternative to OneSignal, Customer.io and Segment Engage.

A typical setup starts by connecting user data through Segment, reverse ETL or the Dittofeed API. You then build segments with multiple operators, design message templates in HTML, MJML or a low-code editor, and send through providers such as SendGrid or Amazon SES. A dashboard tracks message performance, and the tools can be embedded in another product through an iframe or a headless React component.

The core is written in TypeScript and licensed under MIT. It can be self-hosted with Docker Compose or deployed to Render, and a hosted cloud trial is also offered. According to the README, features such as multi-tenancy, embedding and white-labeling belong to a separate licensed, closed-source codebase that you can ask the team about.