The best Google Ads spy tool for a founder's budget

For most founders, the best Google Ads spy tool is seogeoaeo.ai's Competitor Google Ads: each lookup is priced in credits, so you spend only when you have a question, and it shows the rival ads that have run longest. Google's free Ads Transparency Center is the backup when budget is zero, and a full PPC suite such as SpyFu only earns its place once paid search is a large line in your budget.

What a founder actually needs from ad research

Early on, competitor ad research answers a few practical questions. What are rivals promising? Which offers have they kept running? Who else is paying to appear on your brand or category searches? You do not need a dashboard for this. You need the ads, sorted so the important ones are on top, a few times a quarter.

That framing matters because the tools differ less in data than in cost model. The ads themselves come from the same public place: Google's Ads Transparency Center, which has listed ads from verified advertisers on Search, YouTube and Display since 2023.

The three realistic choices

1. seogeoaeo.ai: the default pick

Enter a competitor's domain and an optional country, and the seogeoaeo.ai report lists the Google ads pointing at it. Each ad shows its format, the account behind it, its dates and how long it has run. The text ads that have lasted longest come first, with headlines, descriptions and landing pages, and the report says how many ads are live and how many are new.

The economics suit a small team. The 15-credit price appears before each run, and a lookup that finds no ads is refunded. Because the tool works over REST and MCP, an operator or an AI agent can fold it into a weekly competitor memo.

2. Google's public ad archive: the free fallback

Search an advertiser by name or website, filter by region and date, and open ads one by one. It costs nothing and it is the primary source. The cost is your time: no sorting by run length, and every rival is a separate session of clicking.

3. SpyFu: when paid search is a major channel

SpyFu says it shows the keywords competitors buy, the ads they have tested over time and their ad spend. Those keyword and spend figures are its own estimates, because Google does not publish them. If you manage a large paid search budget and need bid-level planning, a suite like this is the better tool. For a founder checking what rivals say in their ads, it is more than the job requires.

How to decide in one minute

• No budget at all: use the Transparency Center.
• You want sorted answers on a few competitors, a few times a quarter: use seogeoaeo.ai.
• Paid search is one of your biggest costs and you want keyword and spend estimates: add a PPC suite.

Whatever you pick, read the longest-running ads first. A rival rarely keeps paying for an ad that does not pay it back, so those ads show you the claims that work in your market today.