The short version
GitHub Spec Kit is a free, open-source toolkit that adds a spec → plan → tasks workflow to your AI agent. It's deliberately unopinionated — you bring the engineering standards. Keeborg is a one-time paid dev system that ships the opinions and the enforcement: a quality gate, session continuity, and a security audit, personalised to your stack. If you want a blank-canvas scaffold, use Spec Kit. If you want the decisions made and enforced for you, use Keeborg. They can even be used together.
What each one is
GitHub Spec Kit
An open-source toolkit for spec-driven development. You drive it with slash commands that turn an idea into a structured specification, an implementation plan, and a task list your agent works through. It's free, widely adopted, and works across multiple agents (Copilot, Claude Code, and others). It standardises the ceremony of specifying work — but intentionally leaves the engineering opinions to you.
Keeborg
An opinionated dev system you install into the agent you already use. It comes with a global CLAUDE.md of real defaults, invokable skills for each phase, a 95/100 quality gate, continuity files that survive context loss, and a security audit that blocks deploy. One-time payment, personalised to your stack. It standardises how you build, not just how you specify.
Side by side
| GitHub Spec Kit | Keeborg | |
|---|---|---|
| What it is | Open-source spec workflow toolkit | Opinionated dev system |
| Price | Free | One-time payment |
| Where it runs | Inside your existing agent | Inside your existing agent |
| Opinions / defaults | Minimal by design | Strong, battle-tested |
| Quality gate | Bring your own | 95/100 gate built in |
| Session continuity | Not included | Continuity files included |
| Security audit | Not included | Blocks deploy until it passes |
| Stack personalisation | Generic | Generated for your stack |
| Best for | DIY, maximum flexibility | Opinions made + enforced for you |
Spec Kit is actively developed and its feature set evolves — check its repository for the latest. This comparison reflects the difference in philosophy, which is the part that rarely changes.
When GitHub Spec Kit is the better choice
You want a free tool and are happy to invest time assembling your own standards.
You already have strong opinions about how you build and just want a workflow to structure them.
You need something vendor-neutral and open-source you can fork and extend.
You enjoy tuning your own process and treat that as part of the craft.
When Keeborg is the better choice
You want the opinions already made — defaults that came from shipping real projects, not a blank template.
You want quality enforced automatically: a scoring gate, continuity, and a security audit that blocks deploy.
You'd rather pay once and start today than spend a weekend wiring up your own system.
You want it personalised to your exact stack, not generic scaffolding.
Can you use both?
Yes — they sit at different layers. Spec Kit is great at the front of the process: turning an idea into a spec, a plan, and tasks. Keeborg governs the build: how the agent works against those specs, how quality is scored, how state survives across sessions, and what blocks a deploy. If you already love Spec Kit's workflow, Keeborg's opinions and enforcement layer on top of it cleanly. Learn more in our spec-driven development guide.
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See the output before you commit to anything. Generate a full spec stack from a plain-English description in about 90 seconds.
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The Keeborg dev system — quality gate, continuity, and a security audit that blocks deploy — personalised to your stack. One-time, yours forever.
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