Kameleoon vs Flagsmith

Quote on request

From $45 per month (indicative, Start-up plan)

Quote-based, priced by traffic and modules.

Considerably cheaper than LaunchDarkly, and self-hosting removes usage pricing entirely.

Free trial on request.

Free cloud tier with a monthly request allowance; open-source self-hosting is unlimited.

Established

Kameleoon · since 2012

Established

Flagsmith · since 2018

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

• Genuinely easy self-hosting with a Docker image and Helm chart.
• Simple, comprehensible pricing.
• Remote config alongside flags, which covers a lot of mobile use cases.

• Smaller market presence outside Europe.
• Opaque pricing.
• Fewer third-party integrations than Optimizely.

• Experimentation features are basic.
• Smaller company and community than the leaders.
• Fewer governance controls for large organisations.

European enterprises needing both marketer and developer experimentation under GDPR.

Teams wanting straightforward flags without LaunchDarkly pricing or Unleash's operational depth.