Migration modules
Used task-specific plans to guide repeatable framework, language, dependency, and maintenance changes.
Historical tool archive
Second: historical overview
Second was an AI-native codebase-maintenance platform that created pull requests for migrations, upgrades, and large repository changes. The company is no longer active.
No longer active
Archive
What Second was
Second was a Y Combinator W23 company focused on automating codebase migrations and maintenance. Teams connected GitHub repositories, chose a migration module or maintenance task, and received proposed changes in a pull request. Historical examples included framework and language migrations, dependency upgrades, feature-flag cleanup, and test generation.
Second is no longer an active product. Y Combinator lists the company as inactive, its founder describes it as a previous company, and the original domain no longer hosts the code-maintenance service. This page is retained as a historical reference rather than a recommendation to sign up.
Past capabilities
What Second offered
AI-assisted transformations
Combined AI agents with codemods, dependency resolution, and codebase scanning to prepare repository changes.
GitHub workflow
Connected to a repository and returned proposed migration work as a pull request for human review.
Large-change use cases
Promoted tasks such as AngularJS-to-React and JavaScript-to-TypeScript migrations, upgrades, feature-flag cleanup, and test generation.
Availability
Why this listing is historical
Second no longer sells the product, so there is no current pricing. Historical launch material described a free allowance for small repositories and a paid Pro option, but those plans are discontinued and should not be treated as available offers.
- The company and product are no longer active.
- The original service cannot be evaluated, purchased, or relied on for ongoing migrations.
- Historical feature and pricing details may not reflect the final version of the product.
Status checked . Review the historical source ↗
Current options
Active Second alternatives
Coding
Codex
Codex is a current coding agent that can inspect repositories, plan refactors, edit multiple files, run checks, and prepare changes for review.
Explore Codex →Coding
Claude Code
Claude Code is a current terminal-based coding agent for repository-wide maintenance, upgrades, and refactoring workflows.
Explore Claude Code →Coding
Cursor
Cursor provides an active AI coding environment with agents that can work across a codebase, though migration orchestration remains a team-owned process.
Explore Cursor →Questions
Second FAQs
Is Second still active?
No. Y Combinator lists Second as inactive, and the original website no longer offers the codebase-maintenance product.
What did Second do?
Second used AI agents, migration modules, codemods, scanners, and dependency tools to propose codebase migrations and maintenance changes through GitHub pull requests.
What migrations did Second support?
Historical materials cited framework and language migrations, dependency and language upgrades, feature-flag cleanup, test generation, and other code-maintenance work.
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