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First-Class Feature Flags. Out of the box.

Say goodbye to context switching and hello to the building blocks for dynamic logging & configuration.
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Prefab feature flags user interface

Change your systems in production instantly

Feature Flags

Reliable, observable, developer focussed Feature Flags.

Dynamic Logging

Learn more from logs and save money too. Accelerate your understanding of production and improve MTTR.

Dynamic Configuration

Get control of your configuration and make changes in production instantly.

Developer-first from day one.

Give your engineers a developer experience that keeps them in their flow. Diagnose and fix production systems in an instant. Develop locally with our slick as hell editor tools.
Talk to an Engineer

Stay in Your Flow. Stay in Your Editor

Is this flag a zombie? Is it stale? Don't wonder, just hover over the flag to see evaluation data

Autocomplete flag names or create new flags right from your editor.

Testing flag behavior locally? Just click 'personal override' to toggle the flag just for you.

Toggle flags in all environments or click through to the Prefab UI to add more complex rules.

Trusted by

Shepherdly logoShubox logoHuntClub logo

Use the language you want

Ruby logoJava logoNode logoReact logoJavascript logoElixir logoPython logo

Feature Flags without compromise.

To save you precious time and resources, we built the tool we’d want to buy.
See what’s happening. Visualize flag usage. Search for someone and easily put them in the flag.
01Developer Focused
Not just for your product team. Multi-context support lets you target attributes besides the user like: cloud region or availability zone, supporting database migrations or rollout a v2 swap-over.
02Fair Pricing
Straight forward and usage based, you won't find better pricing out there. Developers deserve world-class tools without painful pricing.

Focus on your levers.

We'll take care of the rest.
Faster configuration changes
From install to value
60-Day Free Trial & Free Tier


We switched to Prefab from LaunchDarkly and couldn't be happier. The clients are user-friendly with a powerful UI, and their dynamic logging is a game-changer. We can toggle log levels across our entire stack [Rails, Node, and Typescript], saving costs by enabling low-level logs only when needed.
Mark Faga
HuntClubMark FagaPrincipal Software Engineer
I'm running a startup, but that doesn't mean I don't want the dynamic control over my configuration that I had when I was on a team with 100 engineers. Prefab gets this and gives me the core dynamic configuration and feature flags that can be my foundation as we scale.
Mark Greene
ShepherdlyMark GreeneFounder

Priced fair for fast implementation


Core Technology

  • $1/10k Client/Mobile Requests
  • Unlimited Configs
  • Unlimited Projects
Get Started

Feature Flags & Dynamic Log Levels

Enterprise Level Features

  • No seat-based pricing
  • Keep your logging tool & save $
  • Robust & Realtime
Get Started


Talk with our team for a plan that meets your needs.

Contact Us

Prefab Compared

Features, Price, Enterprise. Pick Two.

Pricing Model
Unlimited Flags & EnvironmentsYesYesStarting > $300Yes
Multi Context (user, team, etc.)YesNoNoYes
User Data Page & Quick AssignmentYesYesNoYes
Reusable SegmentsYesYesYesYes
Percentage RolloutsYesYesYesYes
Flag Infra
Real-Time UpdatesYesYesNo (Polling)Yes
Evaluation MetricsYesBasicNoYes
AB Testing Metrics in ToolYesNoNoNo
Dynamic Log LevelsNoNoNoYes
Workflow automation
Advanced PermissionsYesYesYesNo
Required ApprovalsYesNoNoNo
Security & compliance
SSO (Google)YesYesYesYes
SAML & SOC2YesYesYesNo
Audit Log for Flag ChangesYesYesYesYes
Email SupportYesYesYesYes
Live ChatNoYesYesYes