21st ads
13 creatives read on 29 August 2026: 13 on Google. Run lengths are as of that date.
They are advertising 21st.dev as a free React component library for designers and developers. The only relevant creative is broad and does not explain a distinctive mechanism, workflow or proof point. You can compete by making the first visual and headline demonstrate a specific component-building outcome.
Read the 21st competitor briefEvery Developer tools ad
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Kamply builds the post or reel that answers it, on your brand's own tokens, with a brief first and a gate before anything is called done. Every ad on this wall was read into a competitor report; your reply to it is one brief away.