Developer tools decision
Factory
A competent developer can build a narrow agent-driven code-edit-and-PR workflow in ~30 hours and modest hosting/API cost, but reproducing Factory’s full product (managed compute, cross-platform native apps, enterprise controls, and on‑prem/air‑gapped deployments) is out of scope for a quick self-build.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Factory alternatives, with the arithmetic →
Code Factory publishes itself
Not a way out of the subscription - these are the vendor’s own repositories. Worth a look for how they build, and for anything you would have to integrate with.
What a replacement has to do
- Generate code changes from natural-language instructions, preview diffs, apply changes to a git repo, and run basic tests/linting
What it still won’t have
- Factory-managed cloud computers (remote Droid compute)
- Cross-platform native desktop app and synchronized sessions across devices
- Enterprise features: SSO, SAML/SCIM, audit logs, zero data retention options
- On-prem / air-gapped deployment and vendor-provided dedicated inference pools
- Agent-readiness programs, enterprise support, and readiness dashboard
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 3 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal agent-native dev tool using Node.js (or Python), a small React web UI and a CLI that: 1) accepts a natural-language task; 2) calls an external LLM API (configurable provider/key) to produce code edits; 3) computes and shows a git diff and preview of changed files; 4) commits changes on a feature branch and opens a PR via GitHub API; 5) runs configured linters/tests and reports results in the UI/CLI. Out of scope: distributed/managed compute, multi-device session sync, enterprise SSO/SAML, air-gapped/on-prem orchestration. Include input validation, error handling, retry logic for API calls, and automated tests for the core flows (LLM call mocking, diff generation, git operations).
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 5 cited sources+3
- Price verified on pricing page+3
- Evidence score63
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productFactory homepage
- official pricingFactory pricing
- official docsDesktop App for Droids
- open sourceKilo-Org/kilocode
- open sourceplandex-ai/plandex
Integrity checks
What held up, and what did not.
