Free Firebase Remote Config Alternatives, Compared

The short answer

The best free alternative depends on what you are replacing. If you want a drop-in replacement for Firebase Remote Config with the same API and unlimited free fetches, use AppSpike Remote Config. If you want a managed A/B testing suite with built-in statistics, use GrowthBook or Statsig. If you want to self-host on your own servers, use Unleash, GrowthBook, or Flagsmith. If you only change a few values a month, a JSON file on a CDN may be all you need.

Comparison table

Free-tier limits verified on each vendor's official pricing page, September 2026.

Each option in detail

AppSpike Remote Config

Our product, so read this section knowing that. AppSpike is the only option on this list built specifically as a drop-in replacement for Firebase Remote Config: the SDKs keep the Firebase API names on every platform (fetchAndActivate, getString, setDefaults, subscripts on iOS), and the dashboard imports a Firebase template export in one step, including conditions and percent rollouts. Conditions are evaluated on the device from a CDN-cached template, so there is nothing to meter and the free tier has no fetch limits. Targeting signals never leave the device. A/B experiment arms are built with seeded percentage conditions, and you measure the results in your own analytics. What it does not have: Google Analytics audience targeting, and a managed experiment dashboard with built-in statistics. If you want the full managed experimentation suite, look at GrowthBook or Statsig.

Flagsmith

A mature open-source feature flag platform with remote config support. The cloud free tier is small (50,000 requests per month and one seat), so for a production mobile app the realistic free path is self-hosting the BSD-licensed version with Docker. Good UI, good mobile SDKs, and no Firebase-style API, so plan a real migration of your call sites.

GrowthBook

An open-source experimentation platform where feature flags and remote config come with the A/B testing engine attached. The cloud free tier allows unlimited flags and traffic for up to 3 users in one project, and self-hosting the MIT-licensed core is free. The strongest choice if experiments are the reason you use remote config. It analyzes results in your own data warehouse, which is either a feature or a chore depending on your team.

ConfigCat

A managed service with an unusually generous download allowance: the free tier includes 5 million config JSON downloads per month with unlimited team members. The limits are on the other axis: 10 flags and 2 environments, so it fits high-traffic apps with simple configuration needs. The management platform is proprietary, and self-hosting is a paid enterprise option.

Unleash

The standard choice for self-hosted feature management. The open-source edition (AGPL) is free with unlimited seats and deploys with Docker in minutes. There is no free cloud tier: hosted Unleash starts at $75 per seat per month. Pick it when you want flags on infrastructure you control and you have the operations capacity to run it.

Statsig

Built around experimentation, with a free tier that includes unlimited feature flag and config checks and 2 million analytics events per month. You pay as your event volume grows, not per config fetch. Strong SDK coverage including Unity. Not open source. A good fit when you want flags, config, and experiment analysis in one hosted product.

PostHog

A product analytics suite that includes feature flags and remote config, with 1 million flag requests per month free and usage-based pricing after. If you already use PostHog for analytics, using its flags is the path of least resistance. If you only need config, the full suite is more product than the job requires.

The DIY approach: a JSON file on a CDN

If you use Firebase Remote Config for a handful of values (a maintenance flag, a minimum version, banner text), you can replace it with a static file:

1. Create a config.json with your key-value pairs.
2. Host it on GitHub Pages, Netlify, Vercel, or any CDN.
3. Fetch it on app start, cache the last good copy, and fall back to defaults on failure.

This is free and fully under your control. What you give up: percentage rollouts, country and version targeting, a publish and rollback history, and the discipline of a review step before values reach production. Teams tend to outgrow it the first time a bad value ships to everyone at once.

How to choose

• You want to leave Firebase with the least work: AppSpike. The API is the same and the template imports. Most migrations are an afternoon.
• You need managed A/B testing with built-in statistics: GrowthBook (warehouse-native, self-hostable) or Statsig (hosted, generous free events).
• Your company requires self-hosting: Unleash or Flagsmith, or GrowthBook if experiments matter too.
• Huge traffic, tiny config: ConfigCat's 5M free downloads, or the DIY file.
• You already run PostHog: use its flags and skip a second vendor.
• Under 100K fetches a day and happy: staying on Firebase is a valid answer. The free tier still covers small apps.