Stupify vs Themis

Stupify and Themis are both coding assistants tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

Stupify

stupify runs PR reviews against a corpus of code you actually respect — your own best files, or commit-pinned exemplar packs from coders like dtolnay, DHH, or Rich Harris — and names what's wrong in terms of concrete primitives, not style opinions. It runs on your own Codex plan, so there are no additional API keys or servers to manage. The rubric keeps findings small and actionable: a named helper that got dissolved into its call sites, a hand-rolled state machine where a library call already exists, a duplicated data source already drifting from its canonical version. Once findings are addressed, it posts one line and stops. What it cannot do is catch slop that isn't representable in the corpus — if your taste reference doesn't cover a pattern, neither does the review.

Themis

Themis is a self-hosted GitHub PR review bot that runs against your own Codex or Claude Max subscription, meaning no commercial API key and no per-review billing. It posts inline findings, a structured summary with verdict and severity-ordered sections, and answers follow-up questions directly in PR threads. Review doctrine lives in a `.themis/` directory in your repository, so the bot argues from your rules, not a vendor's defaults. The self-hosted model is the differentiator — but it also means you own the deployment, the uptime, and the debugging when the webhook stops firing.

Attribute	Stupify	Themis
Pricing	Free	Free
Free trial	No	No
Open source	Yes	Yes
Has API	No	No
Self-hosted option	Yes	Yes
Platforms	CLI via npm	Docker
Pros	Corpus-grounded reviews rather than abstract rule sets, which means findings reference actual code decisions rather than style preferences no one can trace back to a reason. Curated taste packs from named, commit-pinned coders, so teams without a large internal corpus can borrow a coherent standard from someone whose output they would point a new hire at. Runs on your own Codex plan with no additional API keys or servers, which means there is no third-party service holding your diffs and no separate billing surface to manage. MIT licensed and self-hostable, so the review pipeline stays inside your infrastructure and there is no vendor dependency to negotiate around. Posts one closing line once findings are addressed and goes quiet — the opposite of a bot that re-flags resolved issues on every subsequent push, which means the PR thread stays readable.	Uses your existing Codex or Claude Max subscription as the inference backend, so there is no additional per-review API cost on top of what you already pay. Repository-scoped review doctrine via `.themis/` config, which means two teams with different standards can run against the same deployed instance without interfering with each other. Inline findings plus a structured summary with verdict, scoring table, and severity ordering, so reviewers get a prioritized reading list rather than a flat wall of comments. Answers follow-up questions inside PR threads, which means a reviewer asking 'why is this flagged?' gets a response without reopening the diff or pulling in another engineer. MIT license with Docker-based self-hosted deployment, so the tool lives inside your network boundary and your code never leaves your infrastructure to reach a third-party review service.
Cons	The review quality ceiling is the quality of the corpus: patterns not represented in your reference files produce no finding, which means AI slop in domains your corpus does not cover ships undetected — teams hit this when a new language or framework appears in contributions before it appears in their exemplar files. No API and no programmatic output surface means stupify cannot be wired into a CI gate that blocks a merge automatically; teams that need a hard merge block on review findings route through a different tool or build a wrapper themselves. Taste packs from external coders are concrete and commit-pinned, but a rubric derived from a codebase in a different domain or language than yours will generate findings that do not transfer — teams that adopt a pack without auditing it first report spending more time dismissing irrelevant findings than addressing real slop, and those teams migrate to maintaining their own corpus or to a general-purpose code review tool with configurable rules.	No managed hosting exists — you run the webhook receiver, the container, and the model API connection yourself. The first time a container crashes during a Friday deploy window, the review bot is silent and PRs merge without it. The tool has no API surface of its own, which means it cannot be triggered from CI scripts, other bots, or custom tooling outside the GitHub App webhook path. Teams that need review automation embedded in a broader pipeline hit a dead end and build a wrapper or switch to a tool with a programmable interface. Requires an active Codex or Claude Max subscription to function — teams without either must obtain one before the bot does anything at all, making the 'free' framing conditional on existing spend. With 7 stars and 11 open issues against 0 pull requests at the time of scrape, the project shows limited external contribution and community momentum. Teams evaluating long-term maintenance risk will not find a large contributor base to absorb upstream issues.

Bottom line

Stupify and Themis are closely matched on pricing model, openness, and API availability — pick by feature set and platform support in the table above.

Frequently asked questions

What is the difference between Stupify and Themis?

Stupify is Free and open source, while Themis is Free and open source. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is Stupify better than Themis?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.