Optimizely vs ConfigCat

Quote on request

From $99 per month (indicative, Pro)

Enterprise annual contracts, commonly in the tens of thousands and up. Priced by traffic and modules.

Unlimited seats on every plan, including free — unusual and genuinely valuable for wide access.

No free tier.

Free forever plan with a monthly config-request allowance and unlimited members.

Widely used

Optimizely · since 2010

Established

ConfigCat · since 2018

• The most capable visual editor for non-technical experiment authoring.
• Deep personalisation and audience-targeting features.
• Established statistics with sequential testing, so peeking is handled correctly.

• Unlimited team members at every tier, so product and support can toggle flags too.
• Very simple to adopt — an afternoon, not a project.
• Broad SDK coverage including Dart and Elixir.

• Expensive, with a suite-oriented sales motion that pushes adjacent products.
• Client-side testing causes flicker and is increasingly blocked by browsers and blockers.
• Heavyweight for teams that only need a handful of experiments.

• No experimentation or analytics to speak of.
• Limited targeting sophistication compared to LaunchDarkly.
• Small vendor.

Large marketing organisations running continuous experimentation on high-traffic sites.

Teams that want simple, cheap flags accessible to the whole company.