Kameleoon vs Unleash

From $495 per month (PBX Starter: 10 experiments, 50k tested visitors)

From $75 per seat/month (Pay-As-You-Go, 5-seat minimum self-hosted)

Kameleoon now publishes an entry price. Above Starter it is priced by traffic and modules on a custom quote.

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.

30-day trial, no card, up to 3 experiments.

Open-source edition is free and self-hosted with no seat limit, but capped at 1 project, 2 environments and 5,000 flags.

Established

Kameleoon · since 2012

Widely used

Unleash / Bricks Software · since 2014

• Genuinely good hybrid model — the same experiment can run client- and server-side.
• Effective anti-flicker implementation.
• EU hosting with healthcare-grade compliance options.

• 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.

• Smaller market presence outside Europe.
• Only the entry tier is priced publicly; everything above it is a sales conversation.
• Fewer third-party integrations than Optimizely.

• 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.

European enterprises needing both marketer and developer experimentation under GDPR.

Privacy-sensitive or cost-sensitive teams that want flags without sending user data to a vendor.