Warmbly is an open-source project built for developers and sales teams managing outbound email.

Yes — Warmbly is open source under the Open Source license and free to use.

What platforms does Warmbly run on?

Warmbly runs on the web and API. It can also be self-hosted.

Is Warmbly still maintained?

Unverified. Warmbly has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Warmbly?

Similar projects tracked by PulseGate include WarmySender, Warm Up Your Email, and WarmInbox.

Warmbly is developed by warmbly.

Is Warmbly open source?

Yes — Warmbly is open source under the Open Source license.

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Warmbly

Name: Warmbly
Author: warmbly

github.comInfrastructure

Warmbly is an open-source cold outreach and email warmup platform. It helps teams manage outbound email campaigns and improve mailbox sending readiness through a self-hosted or hosted deployment.

Open SourceWebSelf-hostedCloud-managedAPI

Visit github.com

Overview

6 features

In the Email & SMS campaigns space, Warmbly takes a focused approach. It focuses on managing cold email outreach and warming email accounts without relying on a proprietary platform. Warmbly is an open-source project aimed at developers and sales teams managing outbound email. The project is open source (Open Source). Warmbly is available on the web and API, and it can be self-hosted.

warmbly builds and maintains Warmbly. Key capabilities include cold outreach, email warmup, and campaign management. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Cold outreach
Email warmup
Campaign management
Mailbox management
Self-hosting
API access

Built with & integrations

Connectors

API

Runs on

BrowserSelf-hostedCloud-managedAPI-only

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen Source

Indexing history

What PulseGate has recorded for this listing

Indexed6 Sept · 00:46 UTC
Warmbly: Open-Source Cold Email verified via Hacker News firehose (Algolia)
Source: Hacker News firehose (Algolia) · Open

Frequently asked questions about Warmbly

What is Warmbly?: Warmbly focuses on managing cold email outreach and warming email accounts without relying on a proprietary platform. It is catalogued under Email & SMS campaigns on PulseGate.
Who is Warmbly for?: Warmbly is an open-source project built for developers and sales teams managing outbound email.
Is Warmbly free?: Yes — Warmbly is open source under the Open Source license and free to use.
What platforms does Warmbly run on?: Warmbly runs on the web and API. It can also be self-hosted.
Is Warmbly still maintained?: Unverified. Warmbly has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Warmbly?: Similar projects tracked by PulseGate include WarmySender, Warm Up Your Email, and WarmInbox.WarmySender Warm Up Your Email WarmInbox
Who makes Warmbly?: Warmbly is developed by warmbly.
Is Warmbly open source?: Yes — Warmbly is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: API · Web
Languages: English
License: Open Source
First seen: 6 Sept 2026
Built for: developers and sales teams managing outbound email
Model: Open source
Solves: Managing cold email outreach and warming email accounts without relying on a proprietary platform.

Index record

Indexed: 6 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 6 Sept 2026

Identity audit (13)

Slug: warmbly-open-source-cold-email-github-com
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 6 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 6 Sept 2026
Canonical URL: https://github.com/warmbly/warmbly

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