Competitor ads APIs
See which ads a competitor runs on Facebook, Instagram, Google Search, YouTube and Display, how long each ad has been live, and which companies on a lead list advertise at all. All from the public ad transparency libraries.
3 tools in this group

Facebook Ad Library Scraper
Meta ads by keyword, advertiser or link, with days running and EU reach.
$0.40 to $0.75 per 1,000 ads

Google Ads Transparency Scraper
Every Google Search, YouTube and Display ad of a domain or advertiser.
$0.90 to $2.00 per 1,000 ads

Google Ads Advertiser Checker
One row per company: does it advertise on Google, and how actively.
$3.20 to $6.00 per 1,000 companies checked