September 2026 Edition, published · The permanent record of that edition, superseded since. The current standing is on the category page →
Index › IT › Developer platform › Feature flags · September 2026 Edition

Feature flags

Asked as “feature flag platform”, and as “feature management tool”, on behalf of a mid-market B2B company. 47 first choices recorded across the direct, paraphrase, budget and scale prompts, twelve models each.
Standing · first-choice share
30%
Contested · ConfigCat 17%
30LaunchDarkly17ConfigCat17Flagsmith36others

30% of first choices, contested.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment; they sit side by side and are never added together.

The standing

Share is the count of first choices across the direct, paraphrase, budget and scale prompts, over all twelve models, for a mid-market B2B company. Ordered by share.
ProductFirst-choice shareNegative rateLabelsQuadrant
01LaunchDarkly30%31%61criticized challenger
02Flagsmith17%9%56accepted challenger
03ConfigCat17%11%36accepted challenger
04Unleash13%8%50accepted challenger
05Statsig9%7%42accepted challenger
06GrowthBook6%2%40accepted challenger
07PostHog Feature Flags6%12%26accepted challenger
Show the two products at 0%, ordered by negative rate
09Split0%30%33criticized challenger
08DevCycle0%0%10accepted challenger
Bars are the share of first choices, 0 to 100Every product with at least 10 labels here. Every product name links to its product page.
All twenty-one head-to-head pages: the top seven products, each against each

Recommended versus criticized

Every product with at least 10 labels here, on both axes. The 30% line names a quadrant, not the verdict above: that one needs more than 40%.

Criticized challengerCriticized default
Negative label rate →
01
02
03
04
05
06
07
08
09
Accepted challengerEndorsed leader
0%First-choice share → · lines at 30% share and 25% negative40%
Key
01LaunchDarkly30%
02Flagsmith17%
03ConfigCat17%
04Unleash13%
05Statsig9%
06GrowthBook6%
07PostHog Feature Flags6%
08DevCycle0%
09Split0%

What they warned about

Two of twelve models held their first choice under the paraphrase. Claude Haiku 4.5, GPT-5.4 mini, Gemini 3.5 Flash, Mistral Small, DeepSeek V4 Flash, Llama 4 Maverick, Qwen 3.7 Flash, Kimi K2, GLM 4.7 FlashX and MiniMax M2.5 changed. A high negative share on a product with few labels is a warning. A low share on a product with many labels is salience, not sentiment.
LaunchDarkly
31%
19 of 61 labels negative · 10 of 12 models · 3 hard negative
“Caution level: High (especially for new adopters or scale-ups)... Avoid if... Microservices, startups, regulated industries, cost-sensitive” DeepSeek V4 Flash, negative prompt
Split
30%
10 of 33 labels negative · 6 of 12 models · 1 hard negative
“Avoid for tight budgets: LaunchDarkly/Split (free tiers cap quickly, then $10+/MAU or seats).” Grok 4.20, budget prompt
Flagsmith
9%
5 of 56 labels negative · 5 of 12 models · 1 hard negative
“Platforms with significant limitations or red flags ... Flagsmith: ... The free tier is very limited (50k requests/month)” Mistral Small, negative prompt
Unleash
8%
4 of 50 labels negative · 4 of 12 models · 2 hard negative
“its self-hosted version can be complex to set up and maintain ... Some users report scalability and performance issues at high traffic volumes” Mistral Small, negative prompt

What they cite

Twelve of the twelve models returned a source list in this edition: four return the pages they cited and eight the search results they consulted.

Sites the answers cite

62 of 72 answers in this category came back with a source list, from 12 of 12 models: citations where the model returns them, or the search results it consulted. 907 links across 169 sites, every framing counted. Ranked by the number of answers carrying the site or page.

vendor site · GrowthBook38 answers · 84 citations · 11 models
vendor site · Harness35 answers · 38 citations · 11 models
25 answers · 32 citations · 10 models
vendor site · Amplitude23 answers · 34 citations · 9 models
23 answers · 23 citations · 9 models
vendor site · Statsig22 answers · 35 citations · 9 models
vendor site · ConfigCat21 answers · 33 citations · 10 models
vendor site · LaunchDarkly20 answers · 28 citations · 9 models
vendor site · Flagsmith19 answers · 25 citations · 8 models
vendor site · Guideflow18 answers · 23 citations · 7 models
18 answers · 19 citations · 7 models
vendor site · Kameleoon17 answers · 19 citations · 10 models

Pages the answers cite

The ten pages named in the most answers, by full address. A page here is one the models returned with a recommendation, not one the index endorses.

Search against answers

Each company's standing in the answers beside its site's footprint in Google search, one row a site: the products the models named on it with their shares, and the share they add up to; monthly searches on Google, and DataForSEO's estimate of AI search demand (modeled from search signals, directional, not a count of queries to any assistant), for the most-searched of the company's and its products' names (the name is in each row's hover text); estimated monthly organic visits to the site; and its best position in Google's top ten for “best feature flag platform”, “feature flag platform”, “feature flag platforms”. US estimates from DataForSEO and Google's Ads Transparency Center. A small company's site, or a mid-sized company's site for its flagship, is marked company; a product on a large parent's site (Google, Microsoft) has no site figures. A column with no figures for this category is left out, and an empty cell means none were seen, not none exist. Two measurements side by side: neither is read as the cause of the other.
Company and productsShareOwn site citedName searches, GoogleAI search demand, est.Organic visitsPaid search a month, est.Google ads, last 30 daysBest Google position
LaunchDarkly launchdarkly.com30%17914,80041040,192$66211
Flagsmith flagsmith.com17%15788052,61833
ConfigCat configcat.com17%12759034,12726
Unleash getunleash.io13%17122,20013,4418,25054
Statsig statsig.com9%12012,100182353,837$1766
GrowthBook growthbook.io6%1202,9001426,646261
PostHog Feature Flags posthog.com6%100320625,936120
Kameleoon kameleoon.com2%3590328,60136
DevCycle devcycle.com0%2326012,7010
Split split.io
Split 0%, Split / Harness Feature Management 0%
0%62246,000342,4921,066

Google's top ten for the three searches hold 15 sites; 6 of them are among the sites the models cited here (configcat.com, flagsmith.com, getunleash.io, growthbook.io, kameleoon.com, launchdarkly.com). The first result for “best feature flag platform” is growthbook.io.

How they answered

Six framings of the same buying question, each sent to every model in a fresh session with search on. One row per model, so a row shows whether it held its answer under rewording, what it named when cost was the constraint, and what it argued against. Computed from the raw judge labels.
ShowHide
ModelDirect“What is the best feature flag platform for a mid-market B2B company?”Paraphrase“Which feature management tool would you recommend to a mid-sized B2B company?”Comparative“What are the top feature flag platforms and how do they differ?”Budget-constrained“What is the best feature flag platform for a company with a limited budget?”Scale-constrained“We are a 500 person company evaluating a feature flag platform. What should we look at?”Negative“Which feature flag platforms should I avoid or be cautious about?”
Claude Haiku 4.5Flagsmith, LaunchDarkly
One alternativeStatsig
FlagsmithChanged
Four alternativesConfigCat, GrowthBook, LaunchDarkly, PostHog Feature Flags
LaunchDarkly
Four alternativesFlagsmith, GrowthBook, PostHog Feature Flags, Statsig
Flagsmith, Unleash
Two alternativesLaunchDarkly, Statsig
no first choiceagainst: LaunchDarkly
GPT-5.4 miniConfigCat
Two alternativesFlagsmith, LaunchDarkly
LaunchDarklyChanged
One alternativeHarness FME
LaunchDarkly
Five alternativesConfigCat, Flagsmith, Split, Statsig, Unleash
Flagsmith, Unleashagainst: Firebase Remote Configno first choiceagainst: LaunchDarkly
Gemini 3.5 FlashFlagsmith
Four alternativesConfigCat, GrowthBook, PostHog Feature Flags, Schematic
against: LaunchDarkly
ConfigCatChanged
Four alternativesFlagsmith, GrowthBook, Schematic, Unleash
against: Harness FME, LaunchDarkly, Statsig
LaunchDarkly
Seven alternativesConfigCat, Flagsmith, GrowthBook, Harness FME, PostHog Feature Flags, Statsig, Unleash
PostHog Feature Flags
Three alternativesConfigCat, Flagsmith, GrowthBook
against: LaunchDarkly
LaunchDarkly
Three alternativesFlagsmith, GrowthBook, Unleash
against: Flagsmith, LaunchDarkly, Optimizely, Split, Unleash
Perplexity SonarLaunchDarkly
Four alternativesFlagsmith, GrowthBook, Statsig, Unleash
LaunchDarklyHeld
Three alternativesCloudBees Feature Management, GrowthBook, Unleash
no first choiceConfigCat, Flagsmith
Two alternativesGrowthBook, Statsig
no first choiceagainst: Flagsmith
Grok 4.20LaunchDarkly
Four alternativesConfigCat, Flagsmith, Statsig, Unleash
LaunchDarklyHeld
Three alternativesFlagsmith, Statsig, Unleash
LaunchDarkly
Five alternativesConfigCat, Flagsmith, GrowthBook, Statsig, Unleash
against: Optimizely Feature Experimentation, Split
Unleash
Three alternativesFlagsmith, GrowthBook, Statsig
against: LaunchDarkly, Split
LaunchDarkly
Four alternativesFlagsmith, Harness, Statsig, Unleash
against: LaunchDarkly, PostHog Feature Flags, Split
Mistral SmallLaunchDarkly
Three alternativesFlagsmith, Statsig, Unleash
no first choiceChangedno first choiceConfigCat
Three alternativesDevCycle, Flagsmith, GrowthBook
no first choiceagainst: ConfigCat, Flagsmith, LaunchDarkly, Split, Unleash
DeepSeek V4 FlashGrowthBook
Four alternativesConfigCat, Flagsmith, Statsig, Unleash
against: LaunchDarkly
UnleashChanged
Two alternativesConfigCat, LaunchDarkly
against: Split
LaunchDarkly
Eight alternativesConfigCat, Flagsmith, GrowthBook, Harness, PostHog Feature Flags, Split, Statsig, Unleash
GrowthBook
Five alternativesConfigCat, Flagsmith, PostHog Feature Flags, Statsig, Unleash
no first choice
Five alternativesConfigCat, Flagsmith, GrowthBook, Statsig, Unleash
against: LaunchDarkly, Split
against: Amplitude, LaunchDarkly, Mixpanel, Split
Llama 4 MaverickLaunchDarklyKameleoonChanged
Three alternativesLaunchDarkly, Split, Swetrix
no first choice
Four alternativesConfigCat, GrowthBook, LaunchDarkly, Statsig
Flagsmith, GrowthBook, Statsig
One alternativeSupaship
no first choicenothing named
Qwen 3.7 FlashConfigCat
Three alternativesFlagsmith, Split, Unleash
against: LaunchDarkly
StatsigChanged
Two alternativesLaunchDarkly, Unleash
LaunchDarkly
Five alternativesConfigCat, Flagsmith, Split, Statsig, Unleash
against: Optimizely Feature Experimentation
Flagsmith, Unleash
Two alternativesConfigCat, PostHog Feature Flags
against: LaunchDarkly
no first choiceagainst: ConfigCat, Flagsmith, LaunchDarkly, Statsig, Unleash
Kimi K2ConfigCat, Statsigagainst: LaunchDarklyLaunchDarkly, UnleashChanged
Four alternativesConfigCat, Flagsmith, Split, Statsig
LaunchDarkly
Five alternativesFlagsmith, GrowthBook, PostHog Feature Flags, Statsig, Unleash
PostHog Feature Flags
Three alternativesFlagsmith, GrowthBook, Unleash
no first choiceagainst: ConfigCat, LaunchDarkly, PostHog Feature Flags, Split
GLM 4.7 FlashXLaunchDarkly
Four alternativesFlagsmith, GrowthBook, Split, Statsig
ConfigCatChanged
Three alternativesLaunchDarkly, Statsig, Unleash
LaunchDarkly, Statsig
Seven alternativesConfigCat, DevCycle, Flagsmith, GrowthBook, PostHog Feature Flags, Split, Unleash
against: Optimizely
Statsig
Four alternativesGrowthBook, LaunchDarkly, PostHog Feature Flags, Unleash
no first choiceagainst: ConfigCat, Flagsmith, GrowthBook, LaunchDarkly, Statsig, Unleash
MiniMax M2.5ConfigCat, LaunchDarkly
Two alternativesFlagsmith, GrowthBook
LaunchDarklyChanged
Two alternativesFlagsmith, Split
LaunchDarkly
Seven alternativesConfigCat, Flagsmith, GrowthBook, PostHog Feature Flags, Split, Statsig, Unleash
PostHog Feature Flags
Four alternativesFlagsmith, GrowthBook, Statsig, Unleash
no first choiceagainst: LaunchDarkly, PostHog Feature Flags, Split
Bold is the first choiceAlternatives are counted; the count opens them.What the answer argued against

The record

One row per call: the version string exactly as returned, whether the model searched, sources cited, and latency.
Seventy-two rows: every prompt, every model, every answer.
PromptModelVersion stringTime (UTC)SearchedSourcesLatency
Direct recommendationClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 09:58yes98 s
Direct recommendationGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 13:57yes47 s
Direct recommendationGemini 3.5 Flashgemini-3.5-flash2026-09-17 13:59yes1630 s
Direct recommendationPerplexity Sonarsonar2026-09-17 14:11yes205 s
Direct recommendationGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 13:20yes4118 s
Direct recommendationMistral Smallmistral/mistral-small via mistral2026-09-17 09:55yes54 s
Direct recommendationDeepSeek V4 Flashdeepseek/deepseek-v4-flash via fireworks2026-09-17 09:49yes1820 s
Direct recommendationLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 13:53yes53 s
Direct recommendationQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 10:02no041 s
Direct recommendationKimi K2moonshotai/kimi-k2 via novita2026-09-17 14:07yes918 s
Direct recommendationGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 12:28yes10156 s
Direct recommendationMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 12:13yes919 s
ParaphraseClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 10:53yes198 s
ParaphraseGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 10:44yes25 s
ParaphraseGemini 3.5 Flashgemini-3.5-flash2026-09-17 13:23yes1023 s
ParaphrasePerplexity Sonarsonar2026-09-17 09:48yes204 s
ParaphraseGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 13:09yes1912 s
ParaphraseMistral Smallmistral/mistral-small via mistral2026-09-17 13:48no01 s
ParaphraseDeepSeek V4 Flashdeepseek/deepseek-v4-flash via deepinfra2026-09-17 13:59yes1939 s
ParaphraseLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 10:17yes53 s
ParaphraseQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 10:26yes1563 s
ParaphraseKimi K2moonshotai/kimi-k2 via novita2026-09-17 12:00yes1046 s
ParaphraseGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 11:33yes1889 s
ParaphraseMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 11:46yes523 s
ComparativeClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 12:45yes108 s
ComparativeGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 13:53yes1011 s
ComparativeGemini 3.5 Flashgemini-3.5-flash2026-09-17 13:55yes1623 s
ComparativePerplexity Sonarsonar2026-09-17 14:05yes207 s
ComparativeGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 14:12yes2417 s
ComparativeMistral Smallmistral/mistral-small via mistral2026-09-17 13:46yes913 s
ComparativeDeepSeek V4 Flashdeepseek/deepseek-v4-flash via fireworks2026-09-17 13:43yes1622 s
ComparativeLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 11:02yes52 s
ComparativeQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 12:36yes528 s
ComparativeKimi K2moonshotai/kimi-k2 via novita2026-09-17 11:36yes939 s
ComparativeGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 09:40yes15178 s
ComparativeMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 12:52yes516 s
Budget constrainedClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 13:38no04 s
Budget constrainedGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 11:40no04 s
Budget constrainedGemini 3.5 Flashgemini-3.5-flash2026-09-17 10:27yes1420 s
Budget constrainedPerplexity Sonarsonar2026-09-17 10:31yes204 s
Budget constrainedGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 14:02yes4627 s
Budget constrainedMistral Smallmistral/mistral-small via mistral2026-09-17 13:24yes55 s
Budget constrainedDeepSeek V4 Flashdeepseek/deepseek-v4-flash via fireworks2026-09-17 09:57yes1918 s
Budget constrainedLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 12:01yes53 s
Budget constrainedQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 11:23no033 s
Budget constrainedKimi K2moonshotai/kimi-k2 via novita2026-09-17 10:37yes1024 s
Budget constrainedGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 11:53yes958 s
Budget constrainedMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 09:48yes1530 s
Scale constrainedClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 13:00no08 s
Scale constrainedGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 14:13no020 s
Scale constrainedGemini 3.5 Flashgemini-3.5-flash2026-09-17 10:19yes939 s
Scale constrainedPerplexity Sonarsonar2026-09-17 10:21yes207 s
Scale constrainedGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 14:09yes1713 s
Scale constrainedMistral Smallmistral/mistral-small via mistral2026-09-17 10:17no010 s
Scale constrainedDeepSeek V4 Flashdeepseek/deepseek-v4-flash via fireworks2026-09-17 13:25yes1823 s
Scale constrainedLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 12:21yes53 s
Scale constrainedQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 11:06yes1059 s
Scale constrainedKimi K2moonshotai/kimi-k2 via novita2026-09-17 10:33yes1023 s
Scale constrainedGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 10:44no022 s
Scale constrainedMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 10:04no012 s
Negative framingClaude Haiku 4.5claude-haiku-4-5-202510012026-09-17 13:18yes2711 s
Negative framingGPT-5.4 minigpt-5.4-mini-2026-03-172026-09-17 12:52yes56 s
Negative framingGemini 3.5 Flashgemini-3.5-flash2026-09-17 10:39yes2032 s
Negative framingPerplexity Sonarsonar2026-09-17 14:11yes199 s
Negative framingGrok 4.20spacexai/grok-4.1-fast-non-reasoning via vertex (asked for grok-4.20-non-reasoning; the API answered as this version)2026-09-17 13:52yes4118 s
Negative framingMistral Smallmistral/mistral-small via mistral2026-09-17 11:42yes57 s
Negative framingDeepSeek V4 Flashdeepseek/deepseek-v4-flash via fireworks2026-09-17 10:47yes2938 s
Negative framingLlama 4 Maverickmeta/llama-4-maverick via bedrock2026-09-17 12:33yes84 s
Negative framingQwen 3.7 Flashalibaba/qwen3.7-flash via alibaba2026-09-17 11:00yes2380 s
Negative framingKimi K2moonshotai/kimi-k2 via novita2026-09-17 09:39yes2933 s
Negative framingGLM 4.7 FlashXzai/glm-4.7-flashx via zai2026-09-17 13:54yes1467 s
Negative framingMiniMax M2.5minimax/minimax-m2.5 via minimax2026-09-17 12:33yes2362 s

Normalization in this category

Every judgment call made between the raw labels and the numbers above, listed so it is visible and reversible.

ShowHide
Category-scoped readings
CloudBees read as CloudBees Feature Management
PostHog read as PostHog Feature Flags
Unresolved, counted raw
Hypertune
Supaship
Discontinued, still offered
No shut-down product was recommended here.
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