Unleash
Open-source feature management with a privacy-first, self-hosted architecture.
What it is
Unleash is a feature-flag service you run yourself, with SDKs that evaluate flags locally so no user data is transmitted to the flag service at all. It supports gradual rollouts, custom activation strategies, environments and constraints, and offers a hosted edition for teams who do not want to operate it.
Best for
Where it is strong
- Local evaluation means no user data leaves your infrastructure — a strong GDPR position.
- Mature, well-documented open-source core with no artificial crippling.
- Kubernetes and Terraform support for infrastructure-as-code workflows.
Where it falls short
- Experimentation and analytics are thin; it is a flag system first.
- Self-hosting means you own uptime for something in your request path.
- Smaller ecosystem than LaunchDarkly.
Pricing
From $75 per seat/month (Pay-As-You-Go, 5-seat minimum self-hosted)
Free tierFree tier: Open-source edition is free and self-hosted with no seat limit, but capped at 1 project, 2 environments and 5,000 flags.
What drives the bill: Self-hosted open source is genuinely free within its project and environment caps. Pay-As-You-Go includes 53M API requests a month with $5 per additional million; Enterprise is an annual custom contract adding SSO, audit and change requests.
Check current pricing on Unleash / Bricks Software’s siteFigures are indicative and were last reviewed August 2026. Vendors change pricing often; confirm before you commit.
Works with
What people who use Unleash say
No reviews of Unleash yet. If you have used it in anger, yours would be the first.
Alternatives to Unleash
If Unleash is not the right fit, these solve the same problem differently.
Flagsmith
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GrowthBook
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ConfigCat
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Simple, cheap feature flags with unlimited team members on every plan.
LaunchDarkly
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The enterprise feature-flag platform, with experimentation layered on top.