---
title: "Sculptor vs Fredrin"
description: "Sculptor is Imbue's MIT-licensed workspace for parallel agents. Fredrin is the alternative when that work needs a ticket board and a review step."
url: "https://fredrin.com/compare/sculptor"
---

# Sculptor vs Fredrin

Sculptor runs agents in parallel worktree workspaces and opens pull requests from them. Fredrin runs them as tickets on a board, each ending in a pull request you review. Here's the honest comparison, and where a desktop board of parallel agents pulls ahead.

## What each tool is for

### Sculptor (parallel agent workspace)

Sculptor runs agents in parallel worktree workspaces and opens pull requests from them.

### Fredrin (desktop agent board)

Fredrin runs them as tickets on a board, each ending in a pull request you review.

## Fredrin vs Sculptor, side by side

Sculptor earns partial credit where it legitimately covers a row. Nothing here is stacked against it.

| Capability | Sculptor | Fredrin |
| --- | --- | --- |
| Runs many coding agents in parallel | Yes | Yes |
| Each task in its own git worktree | Yes | Yes |
| Opens GitHub pull requests | Yes | Yes |
| Agent can work in your repo in place | Yes | No |
| Kanban board from backlog to review | No | Yes |
| PR + CI status on the card | Partial — on the PR button | Yes |
| Runs on Windows | No | Yes |
| Runs on Linux | Yes | Yes |
| Open source | Yes | No |
| Paid team plan, shared board | No | Yes |

## Why teams move from Sculptor to Fredrin

### A board across the work, not a list of workspaces

Sculptor is organised around the agent workspaces you've spun up. Fredrin is organised around a backlog that moves through planning, building and review, so the surface answers what should ship next, not only what is currently running.

### PR status across the board, not per workspace

Both tools open pull requests and both show CI status. Sculptor's PR button reports checks, reviews and merge state for the workspace you're looking at. Fredrin puts that state on every card at once, so one glance at the board tells you which of ten tickets went red, and merging the PR completes the ticket.

### Past a research preview

Sculptor is an experimental research preview and says so: free, MIT, actively changing. Fredrin is a paid product with a published plan set and a Team tier, which is a different trade: less to read and fork, more to rely on.

## An honest read

### Choose Sculptor

You want to read and fork the source, or let an agent work directly in your existing checkout instead of a separate worktree. Sculptor is MIT and free, its PR button tracks checks and reviews inline, and its in-place workspace mode has no Fredrin equivalent.

### Choose Fredrin

You want a backlog and a review column around those parallel agents, PR and CI status on every card, a Team plan for shared work, or a Windows build.

## Sculptor vs Fredrin: FAQ

### Is Fredrin a Sculptor alternative?

For the orchestration half, yes. Both run several coding agents in parallel in isolated worktrees on your own machine, and both open pull requests and report their CI status. Sculptor focuses on the workspace around one agent: a files-and-diff panel, an in-place mode, bundled workflow skills. Fredrin focuses on the board across many: a backlog, a review column, and PR status visible on every ticket at once.

### Can an agent work directly in my checkout rather than a worktree?

In Sculptor, yes: alongside its default worktree it offers a full-clone workspace and an in-place mode where the agent works in your original repository. Fredrin has no equivalent. Every ticket gets its own branch and worktree, because that isolation is what lets a whole board run at once. You open or review that work as a diff, and the branch is in your repo, so you can check it out yourself.

### Is Sculptor open source?

Yes. Sculptor is MIT-licensed and its source is on GitHub, and it ships support for Claude Code, Imbue's Pi harness, and other terminal-based agents. Fredrin is not open source, though it runs against your own GitHub repositories.

### Which platforms does each run on?

Sculptor publishes builds for macOS on Apple Silicon and for Linux. Fredrin runs on macOS 13+ (Apple Silicon and Intel), Windows 10+, and Linux on x64. So on Windows or an Intel Mac Fredrin is the option, and on Linux you can now weigh them on the product rather than the platform (Sculptor's figures as of July 2026).