What does a feature flag tool cost?

Paid plans start at $10 per service connection per month, billed annually, plus $8.33 per 1K client-side MAU for LaunchDarkly (USD per service connection per month, billed annually, plus $8.33 per 1K client-side MAU), £125,000 per year for Optimizely (GBP per year, partner price), $150 per month, 5M events included, then $0.05 per 1K events for Statsig (USD per month), $55 per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month) for Datadog Experiments (formerly Eppo) (per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month)), $40 per seat per month, up to 30 users for GrowthBook (USD per seat per month, up to 30 users), $75 per seat per month, billed monthly, 53M API requests included ($5 per extra million) for Unleash (per seat per month, billed monthly, 53M API requests included ($5 per extra million)), $40 per month, billed yearly ($45 monthly), 1 million requests, 3 team members for Flagsmith (per month, billed yearly ($45 monthly), 1 million requests, 3 team members), $110 per month, billed monthly, 25 million config downloads for ConfigCat (per month, billed monthly, 25 million config downloads), $500 per month, billed annually ($625 monthly), 100,000 client-side MAU for DevCycle (per month, billed annually ($625 monthly), 100,000 client-side MAU). Prices are as shown on each pricing page when it was last read.

What is feature flag tool pricing based on?

LaunchDarkly and Statsig and Datadog Experiments (formerly Eppo) and ConfigCat and DevCycle: flat per account. Optimizely and Harness Feature Management & Experimentation: contact sales. GrowthBook and Unleash and Flagsmith: per seat.

Which feature flags and experimentation have a free plan?

LaunchDarkly, Statsig, PostHog, GrowthBook, Unleash, Flagsmith, ConfigCat, DevCycle list a free plan next to the paid tiers.

Feature flags and experimentation pricing

Feature flag tools switch features on and off for chosen users and run experiments without new deploys. The billing unit varies: LaunchDarkly charges $10 per service connection a month plus client-side MAU, Unleash $75 per seat, ConfigCat a flat $110 a month for Pro, and PostHog and Datadog charge per flag request (PostHog is free up to 1 million requests a month). GrowthBook, Unleash and Flagsmith have free open-source editions, and enterprise tiers are quoted.

Exhibit 1

Flagsmith is the cheapest way in at $40, against $500 for DevCycle

Entry price of each product, USD per month

FlagsmithStart-Up$40
ConfigCatPro$110
StatsigPro$150
DevCycleBusiness$500

Feature flags and experimentation compared

Current list prices as last read from each pricing page.

Product	Starts at	Top listed plan	Priced by	Free plan	History
LaunchDarkly	$10 per service connection per month, billed annually, plus $8.33 per 1K client-side MAUFoundation, USD per service connection per month, billed annually, plus $8.33 per 1K client-side MAU	contact sales	Flat per account	Yes	read Nov 2026
Optimizely	£125,000 per yearContent Cloud, GBP per year, partner price	contact sales	Contact sales	No	read Sep 2026
Statsig	$150 per month, 5M events included, then $0.05 per 1K eventsPro, USD per month	contact sales	Flat per account	Yes	read Sep 2026
Harness Feature Management & Experimentation	contact sales	contact sales	Contact sales	No	read Nov 2026
PostHog	free	free	unknown	Yes	read Nov 2026
Datadog Experiments (formerly Eppo)	$55 per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month)Feature Flags, per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month)	$450 per experiment launched per month, billed annually ($530 month-to-month, $575 on-demand)Experiments	Flat per account	No	read Nov 2026
GrowthBook	$40 per seat per month, up to 30 usersPro, USD per seat per month, up to 30 users	contact sales	Per seat	Yes	read Nov 2026
Unleash	$75 per seat per month, billed monthly, 53M API requests included ($5 per extra million)Pay-As-You-Go, per seat per month, billed monthly, 53M API requests included ($5 per extra million)	contact sales	Per seat	Yes	read Nov 2026
Flagsmith	$40 per month, billed yearly ($45 monthly), 1 million requests, 3 team membersStart-Up, per month, billed yearly ($45 monthly), 1 million requests, 3 team members	$250 per month, billed yearly ($300 monthly), 5 million requests, 5 team membersScale-Up	Per seat	Yes	read Nov 2026
ConfigCat	$110 per month, billed monthly, 25 million config downloadsPro, per month, billed monthly, 25 million config downloads	$4,500 per month, billed monthly, 6 billion config downloadsDedicated	Flat per account	Yes	read Nov 2026
DevCycle	$500 per month, billed annually ($625 monthly), 100,000 client-side MAUBusiness, per month, billed annually ($625 monthly), 100,000 client-side MAU	contact sales	Flat per account	Yes	read Nov 2026

Feature flags and experimentation pricing questions

What does a feature flag tool cost?: Paid plans start at $10 per service connection per month, billed annually, plus $8.33 per 1K client-side MAU for LaunchDarkly (USD per service connection per month, billed annually, plus $8.33 per 1K client-side MAU), £125,000 per year for Optimizely (GBP per year, partner price), $150 per month, 5M events included, then $0.05 per 1K events for Statsig (USD per month), $55 per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month) for Datadog Experiments (formerly Eppo) (per 1M flag configuration requests per month, billed annually, 1M to 10M ($89 month-to-month)), $40 per seat per month, up to 30 users for GrowthBook (USD per seat per month, up to 30 users), $75 per seat per month, billed monthly, 53M API requests included ($5 per extra million) for Unleash (per seat per month, billed monthly, 53M API requests included ($5 per extra million)), $40 per month, billed yearly ($45 monthly), 1 million requests, 3 team members for Flagsmith (per month, billed yearly ($45 monthly), 1 million requests, 3 team members), $110 per month, billed monthly, 25 million config downloads for ConfigCat (per month, billed monthly, 25 million config downloads), $500 per month, billed annually ($625 monthly), 100,000 client-side MAU for DevCycle (per month, billed annually ($625 monthly), 100,000 client-side MAU). Prices are as shown on each pricing page when it was last read.
What is feature flag tool pricing based on?: LaunchDarkly and Statsig and Datadog Experiments (formerly Eppo) and ConfigCat and DevCycle: flat per account. Optimizely and Harness Feature Management & Experimentation: contact sales. GrowthBook and Unleash and Flagsmith: per seat.
Which feature flags and experimentation have a free plan?: LaunchDarkly, Statsig, PostHog, GrowthBook, Unleash, Flagsmith, ConfigCat, DevCycle list a free plan next to the paid tiers.