What feature flags tool does Claude Code recommend?

Custom/DIY is the most-recommended feature flags tool, appearing in 68.8% of responses. The runner-up is LaunchDarkly at 21.3%. This is based on 80 extractable responses across 4 project types.

Is feature flags a settled or competitive market in AI recommendations?

Feature Flags is classified as "Competitive" — no single tool dominates (<50%), and the winner often depends on the project stack.

Do different Claude models agree on feature flags tools?

Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on Custom/DIY as the top feature flags tool.

Feature Flags

Q: Do different Claude models agree on feature flags tools?

Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on Custom/DIY as the top feature flags tool.

Competitive

80 extractable responses · Winner: Custom/DIY at 68.8%

Overall Breakdown

n=80 extractable responses.

Custom/DIY55/80 (68.8%) CI: 57.9–77.8%

LaunchDarkly17/80 (21.3%) CI: 13.7–31.4%

PostHog3/80 (3.8%) CI: 1.3–10.5%

Also Recommended

Tools that appear as second-choice alternatives or mentions when a different tool is picked as primary. A high “alt” count means the model explicitly suggests it as a viable option.

Tool	Alt picks	Mentions	Total
Flagsmith	17	8	25
PostHog	16	9	25
Unleash	16	10	26
LaunchDarkly	11	11	22
Statsig	9	12	21
GrowthBook	7	13	20
ConfigCat	6	13	19
Split.io	6	5	11

By Stack

Tool preferences differ by language ecosystem. Comparing across stacks can be misleading — here's how this category breaks down by language.

JS/TS

JavaScript / TypeScript

2 repos

Custom/DIY62.6% avg

LaunchDarkly23.9% avg

PostHog22.2% avg

Python

1 repo

Custom/DIY79.2% avg

LaunchDarkly27.1% avg

Model-by-Model Comparison

Repo	Sonnet 4.5	Opus 4.5	Opus 4.6
TaskFlowJS/TS Next.js 14, TypeScript, App Router	LaunchDarkly50% Custom/DIY33.3%	Custom/DIY55.6% PostHog22.2% LaunchDarkly11.1%	Custom/DIY55.6% LaunchDarkly22.2%
DataPipelinePY FastAPI, Python 3.11, Pydantic	Custom/DIY75% LaunchDarkly16.7%	Custom/DIY62.5% LaunchDarkly37.5%	Custom/DIY100%
InvoiceTrackerJS/TS Vite, React 18, TypeScript	Custom/DIY72.7% LaunchDarkly18.2%	Custom/DIY72.7% LaunchDarkly27.3%	Custom/DIY85.7% LaunchDarkly14.3%

Category Insight

The clearest build-over-buy result. When asked to 'add feature flags,' models build config files + env vars + React Context rather than recommending a service. Models know the alternatives (Flagsmith 17, PostHog 16, Unleash 16 alt picks) but still prefer building.

Frequently Asked Questions

What feature flags tool does Claude Code recommend?: Custom/DIY is the most-recommended feature flags tool, appearing in 68.8% of responses. The runner-up is LaunchDarkly at 21.3%. This is based on 80 extractable responses across 4 project types.
Is feature flags a settled or competitive market in AI recommendations?: Feature Flags is classified as "Competitive" — no single tool dominates (<50%), and the winner often depends on the project stack.
Do different Claude models agree on feature flags tools?: Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on Custom/DIY as the top feature flags tool.