Flags SDK
Flags SDK: feature flags for Next.js and SvelteKit
Recommended for
- Solo / Indie
- Idea-Stage
- Seed
SSIE
Stage Fit Recommendations
Following data shows why Flags SDK is recommended for listed teams. The Fit Score represents the percentage fit of Flags SDK to each company stages, as calculated by the SSIE.
Stage
Fit Score
Fit Reasons
Solo / Indie
$0–$2,000 MRR
83- Feature flags for Next.js and SvelteKit
- Install directly with npm
- Free / Open Source plan covers a solo founder at no cost
Idea-Stage
$0
91- Simple declarative flag API
- Works with any flag provider
- Vercel provider adapter available
- Free / Open Source plan covers 1 user at no cost
Seed
$10k–$100k MRR
88- Precompute flags for static pages
- Controlled rollouts and A/B tests
- Free / Open Source plan covers about 3 users at no cost
Flags SDK is a free, open-source library for using feature flags in Next.js and SvelteKit. It provides a declarative API for defining and using feature flags, supporting both app router and pages router in Next.js. The SDK works with any flag provider and helps maintain best practices while keeping websites fast. It is ideal for A/B testing and controlled rollouts. Flags SDK integrates with Vercel through the @flags-sdk/vercel adapter. The library is designed for developers to manage feature flags efficiently in their applications.
Pricing
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