Can you recommend a remote config service for turning features on by user segment?

Yes — if your main need is remote config + feature gating by user segment, the best options are usually:

Strong recommendations

1. LaunchDarkly

Best overall for feature flags and targeting

• Very strong targeting/segmentation rules
• Mature SDKs across many platforms
• Good rollout controls, experiments, and kill switches
• Reliable at scale

Good for: teams that want a dedicated feature-flag platform with robust targeting logic.

Downside: can get expensive.

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2. Firebase Remote Config

Best if you’re already in the Firebase/Google ecosystem

• Easy to use for mobile and web
• Supports user properties and audience-based targeting
• Good for simple config and gradual rollouts

Good for: apps already using Firebase Auth, Analytics, or Crashlytics.

Downside: less powerful and flexible than dedicated feature-flag tools.

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3. ConfigCat

Best budget-friendly LaunchDarkly alternative

• Feature flags with user targeting and segmentation
• Simpler pricing
• Easy SDKs and setup
• Good enough for many SaaS products

Good for: smaller teams that want flagging without enterprise pricing.

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4. Statsig

Best if you want flags + experiments + analytics

• Segmentation, feature flags, experiments, metrics
• Strong product experimentation workflow
• Good targeting and rollout controls

Good for: product teams that want to combine config, A/B testing, and decisioning.

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5. Unleash

Best open-source option

• Open-source feature management
• Supports flexible strategies and segments
• Self-hostable

Good for: teams that want control, privacy, or self-hosting.

Downside: more ops work; less polished than hosted products.

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Quick pick by situation

• Need the most mature and robust: LaunchDarkly
• Already on Firebase: Firebase Remote Config
• Want lower cost: ConfigCat
• Want flags + experiments: Statsig
• Want open source/self-hosted: Unleash

My practical recommendation

If you’re asking for a general-purpose service to turn features on/off by user segment, I’d usually suggest:

• LaunchDarkly if budget isn’t the main concern
• ConfigCat if you want something simpler and cheaper
• Firebase Remote Config if you already use Firebase and your needs are modest

If you want, I can also recommend one based on:

• your stack (web/mobile/backend),
• budget,
• whether you need A/B testing,
• or whether you want open source/self-hosted.