Google Keyword Planner remains the gold standard for free keyword research because it pulls directly from Google's search data. You need a Google Ads account (free to create), and while volume ranges are vague unless you run active campaigns, it's perfect for discovering related terms and getting ballpark search numbers. Pair it with Google Search Console, which shows exactly what queries drive your existing traffic and where you rank 8-15, signaling low-hanging optimization opportunities. Ubersuggest gives you 3-5 free searches per day with actual volume estimates, keyword difficulty scores, and SERP previews. It's limited but useful for quick competitive checks. Answer The Public visualizes question-based and preposition-based queries around your seed keyword, excellent for content ideation and capturing long-tail informational intent. Keywords Everywhere switched to a freemium model but still shows related keywords and "people also search for" data in your browser without paying. For local SEO in Ottawa or Toronto, Google's autocomplete and "people also ask" boxes are underrated free sources—they reflect real user behavior and often reveal hyper-specific local modifiers. At Ottawa SEO, we layer these free tools together rather than relying on one. GSC tells us what's working, Keyword Planner confirms volume tiers, and Ubersuggest spot-checks competitors. For portfolio-scale keyword mapping across 500+ domains, we eventually moved to paid tools (Ahrefs, Semrush), but 80% of small businesses can execute effective keyword research using only free options if they're systematic about it. The main tradeoff: free tools give you narrower data windows, fewer queries per day, and less historical trend insight. You won't see full competitor keyword lists or track rankings over time without paying. But for identifying core topics, validating search demand, and finding content gaps, the free stack is completely viable. Just export and organize your data in spreadsheets because none of these tools talk to each other.