Comparison
How does Vibe Flags stack up against other feature flag solutions?
Feature Comparison
| Feature | Vibe Flags | LaunchDarkly | Unleash | PostHog Feature Flags |
|---|---|---|---|---|
| Framework agnostic | ✅ | ✅ | ✅ | ✅ |
| Easy setup | ✅ | ✅ | 🚫 | ✅ |
| Self-hosted option | ✅ | 🚫 | ✅ | ✅ |
| Backendless | ✅ | 🚫 | 🚫 | 🚫 |
| Offline-mode (no auth) | ✅ | 🚫 | 🚫 | 🚫 |
| Free, unlimited | ✅ | 🚫 | ✅ | 🚫 |
| localStorage persistence | ✅ | 🚫 | 🚫 | 🚫 |
| AI-friendly HTML API | ✅ | 🚫 | 🚫 | 🚫 |
| Bundle size | ~11KB | ~50KB+ | ~20KB+ | ~30KB+ |
Where Vibe Flags Wins
Zero config, instant setup. No account, no API keys, no backend. Add one script tag and you're done:
<script type="module" src="https://unpkg.com/@vibe-flags/core"></script>
<vibe-flags-boolean name="myFeature" value="true">
<p>This content is behind a flag.</p>
</vibe-flags-boolean>
<vibe-flags-toolbar></vibe-flags-toolbar>AI-native HTML API. Flags are declared in HTML — LLMs and AI coding agents can read, write, and toggle them without learning any SDK. The markup is self-documenting.
Offline-first by design. State lives in localStorage. No network calls, no latency, works in airplane mode.
Tiny footprint. ~11KB gzipped — suitable for landing pages, prototypes, and side projects where every byte counts.
No vendor lock-in. Open source, MIT licensed. There's no service to cancel or migrate away from.
Where Enterprise Tools Win
LaunchDarkly, Unleash, and PostHog are built for production systems at scale. They offer things Vibe Flags intentionally does not:
- Audit trails and history — who changed what flag, when, and why.
- Team management and permissions — role-based access control across a large engineering org.
- Analytics and experimentation — A/B testing, conversion tracking, feature adoption metrics.
- Targeting rules — serve flags based on user attributes, cohorts, or percentages.
- Server-side evaluation — evaluate flags before rendering, useful for SSR or backend services.
If your use case involves production rollouts with gradual percentage-based targeting, user cohorts, or compliance requirements — use one of those tools.
When to Use Vibe Flags
Vibe Flags is the right choice when:
- You are vibe-coding or prototyping and want flags without infrastructure.
- You are building a static site, demo, or playground.
- You want AI agents or LLMs to control feature flags directly in HTML.
- You need offline-first behavior with zero external dependencies.
- You want a free, open-source solution with no vendor relationship.