Deploy code to production without releasing it to users.
Feature flags decouple deployment from release. Code goes to production in a dark launch; the flag controls who sees it — internal team first, then beta users, then everyone. Safer rollouts, easier rollbacks, and the ability to target features to specific users or plans.
Needing to ship features progressively (beta users, specific plan tiers, gradual percentage rollout) without separate deployments
Feature flags solve several distinct problems:
Gradual rollout: Release a new feature to 5% of users, watch metrics, increase to 25%, then 100%. If something goes wrong: toggle the flag to 0% without a deployment.
Beta access: Show a feature only to users who opted into the beta program (a list of user IDs or an attribute like is_beta_user = true).
Plan gating: Show a feature only to users on the Pro plan. Different from entitlement checks — flag-based gates can be updated instantly without code changes.
A/B testing: Show version A to 50% of users, version B to 50%. Measure which performs better.
Kill switch: Feature with a known bug can be turned off instantly without a deployment.
The implementation options:
Posthog feature flags: Posthog includes feature flags alongside product analytics. If already using Posthog for analytics, feature flags come for free. Supports boolean flags, multivariate flags, and user property targeting.
const showNewFeature = posthog.isFeatureEnabled('new-dashboard');
LaunchDarkly: Purpose-built feature flag service. More powerful targeting rules; higher cost. Appropriate for teams where feature flags are a primary workflow.
Simple database flags:
For basic use cases: a feature_flags table or a JSON column on the organization record. No external service; requires custom admin UI to toggle. Works for a small number of flags.
Feature flag system that allows controlled rollouts, per-user targeting, and instant rollbacks without redeployment
Posthog feature flags
integration (or LaunchDarkly)
Flag evaluation
in components and API routes
Targeting rules
(user attribute, plan, percentage rollout)
Admin UI
to toggle flags without code changes
Server-side evaluation
for sensitive features (not just client-side)
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
Feature flag system that allows controlled rollouts, per-user targeting, and instant rollbacks without redeployment
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Feature flag scope is the number of flags, the targeting complexity, and the choice of service. Fixed-price.
Questions, answered.
For UI visibility: client-side is fine. For access control (hiding paid features): server-side. A client-side flag can be bypassed by a determined user who inspects the code.
Active flags more than ~20-30 become hard to manage. Practice "flag cleanup": when a feature is fully rolled out, remove the flag and the conditional code. Stale flags are technical debt.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.