Otto is an open-source project built for ruby developers building Rack applications.

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

What platforms does Otto run on?

Otto runs on the command line. It can also be self-hosted.

Is Otto still maintained?

Unverified. Otto 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 are alternatives to Otto?

Similar projects tracked by PulseGate include vaultbeat-mcp, OpenHire, and flux-opcodes.

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Otto

Name: Otto
Author: Delano

github.comInfrastructure

Otto is an open-source Ruby tool for defining Ruby 3 Rack applications in plain-text configuration. It is intended for developers who want a concise way to describe and run Rack-based web applications.

Open SourceCLISelf-hosted

Visit github.com

Overview

4 features

In the Frameworks & SDKs space, Otto takes a focused approach. It focuses on defining and configuring Ruby 3 Rack applications without writing conventional application setup code. It is built as an open-source project for ruby developers building Rack applications. Otto is open source under the Open Source license. It runs on the command line, and it can be self-hosted.

Delano builds and maintains Otto. Among its 4 catalogued features are plain-text app definitions, ruby 3 support, and rack app support.

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

Plain-text app definitions
Ruby 3 support
Rack app support
Configuration-driven setup

Built with & integrations

Runs on

CLISelf-hosted

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tier

Indexing history

What PulseGate has recorded for this listing

Indexed5 Sept · 11:43 UTC
otto verified via RubyGems just-updated
Source: RubyGems just-updated · Open

Frequently asked questions about Otto

What is Otto?: Otto focuses on defining and configuring Ruby 3 Rack applications without writing conventional application setup code. It is catalogued under Frameworks & SDKs on PulseGate.
Who is Otto for?: Otto is an open-source project built for ruby developers building Rack applications.
Is Otto free?: Yes — Otto is open source under the Open Source license and free to use.
What platforms does Otto run on?: Otto runs on the command line. It can also be self-hosted.
Is Otto still maintained?: Unverified. Otto 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 are alternatives to Otto?: Similar projects tracked by PulseGate include vaultbeat-mcp, OpenHire, and flux-opcodes.vaultbeat-mcp OpenHire flux-opcodes
Who makes Otto?: Otto is developed by Delano.
Is Otto open source?: Yes — Otto is open source under the Open Source license.

At a glance

Pricing: Open Source
Platforms: CLI
Languages: English
License: Open Source
First seen: 5 Sept 2026
Built for: Ruby developers building Rack applications
Model: Open source
Solves: Defining and configuring Ruby 3 Rack applications without writing conventional application setup code.

Developer

Delano

Index record

Indexed: 5 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 5 Sept 2026

Identity audit (13)

Slug: otto-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: 5 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: 5 Sept 2026
Canonical URL: https://github.com/delano/otto

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