fractal alternatives
Curated alternatives to fractal — and why you'd switch.
Fusion
A multi-agent software factory: describe a task, agents plan (PROMPT.md), build, review and merge in isolated worktrees — kanban + graph board, missions, agent chat rooms, any model. Early preview.
Why switchBoth are agent software factories working in isolated git worktrees; fusion runs a flat plan/build/review/merge pipeline, fractal recurses â nodes spawn children per subtask.
Full comparison →evo
Karpathy-style autoresearch on any codebase: /evo:discover instruments the benchmark, /evo:optimize runs tree search with parallel subagents in worktrees. Plugin for Claude Code, Codex & co.
Why switchBoth grow trees of worktree-isolated agent loops. evo's tree searches for a better SCORE on a fixed benchmark; fractal's tree decomposes a TASK into subtasks. Optimization vs delegation — same shape, different objective.
Full comparison →fabro
Rust 'software factory' for coding agents: define the SDLC as a graph, agents execute it through verification gates, you intervene only at the stages that matter. Server, runs board, sandboxes.
Why switchOpposite philosophies of unattended multi-agent coding: Fabro encodes the process up front as a workflow graph with verification gates; fractal lets the process emerge recursively under resource caps. Predefine vs self-organize.
Full comparison →