Palumb review
Code-defined workflows with retries and self-hosting, using your own sending providers.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Palumb gives developers a way to define notification workflows in code, with a managed cloud option or a self-hosted stack. It is aimed at teams that want notification logic in their own codebase and need workflows to wait for events or delays, collect events into digests, and fan out messages to topic subscribers. Its SDKs cover TypeScript, PHP, .NET, Python, Go, Java, and Rust, while dashboard, REST API, and MCP server access provide additional ways to interact with the service.
Durability and delivery controls are central to the product. Workflows can wait across crashes and deployments; retries use backoff, and duplicate-send protection reuses the same Message-ID. Palumb also records accepted, failed, and bounced delivery outcomes. Documented channels include email, SMS, Telegram, Slack, and push, and event collection windows support digest notifications. These features make it relevant to teams with event-driven notification logic, rather than only straightforward one-off sends.
Palumb sends through providers and credentials supplied by the customer, so teams need to bring their own sending setup. The ongoing beta is free, and the published description says it has no end date. Teams can choose managed cloud or self-hosting; the self-hosted stack uses the application, Restate, and PostgreSQL, and the delivery path is published under AGPL-3.0. Palumb is a fit for developers who value code-defined, durable workflows and want deployment choice. Teams seeking provider-supplied sending capacity or a workflow setup that does not rely on code should consider a different approach.
Palumb pros and cons
- Where it wins
- Waits for events or delays across crashes and deployments
- Retries with backoff and duplicate-send protection
- Offers SDKs for TypeScript, PHP, .NET, Python, Go, Java, and Rust
- Where it doesn't
- Sending depends on customer-provided providers and credentials
- Workflow logic is defined in code rather than only through a dashboard
- Self-hosting requires the application, Restate, and PostgreSQL
Palumb fact sheet, pricing and score →
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