SEO

Best Keyword Research Tools in 2026 — Free Ones First

Most keyword tool roundups exist to sell you a $139 subscription. This one starts with the free tools that cover most of the job, then tells you the specific point at which paying actually helps.

By Mohit Koli•August 24, 2026•Updated September 2026•11 min read

Contains affiliate links; I may earn a commission at no extra cost to you. Pricing checked in September 2026 — SaaS plans change, so confirm before subscribing.

The 30-second answer

Start with Google Search Console. Free, and it shows real queries reaching your site. Nothing paid replaces it.
Add Google Keyword Planner for volume ranges on keywords you do not rank for yet.
Best cheap upgrade: Mangools KWFinder, ~$29.90/mo billed yearly ($49 monthly). Ahrefs Starter ($29/mo, monthly-only, 200 credits) is the credit-capped alternative.
Best overall: Semrush Keyword Magic Tool — one of the largest databases (27.3 billion keywords, by Semrush's own count), $139/mo on the SEO plan.
The real skill is reading the search results page, not reading a difficulty score.

Free tools, ranked by how much they matter

Google Search Console

Free forever

The single most valuable SEO tool that exists, and it is free. It shows every query that produced an impression for your site, your average position, and your click-through rate. That last number is where the easy wins live: a page ranking 8th with a 0.5% CTR usually needs a better title, not more backlinks.

Google Keyword Planner

Free with an Ads account

Volume ranges straight from Google. Without active ad spend the ranges are coarse — '1K-10K' is a wide bucket — but it is authoritative about relative demand and costs nothing.

Ahrefs free plan

Free forever, limited

Free Web Analytics, Site Audit and Site Explorer for domains you verify — your own site's data only, and Keywords Explorer is not included. For competitor checks and keyword ideas, Ahrefs' separate free web tools (Free Keyword Generator, Keyword Difficulty Checker, Backlink Checker, AI Overviews Tracker, AI Mode Tracker) cover spot-checks without a subscription.

Google autocomplete and People Also Ask

Free

Underrated. Type your topic into Google and read the suggestions and the People Also Ask box — those are real queries, phrased the way real people phrase them, with no tool between you and the data.

New in 2026: Search Console now reports AI Overview and AI Mode impressions

Google added a Generative AI performance report to Search Console (announced on the Search Central Blog in June 2026) and, as of 31 August 2026, rolled it out to all websites worldwide. It shows how many times links to your site were shown inside AI Overviews and AI Mode on Search, broken down by page, country, date and device, with a separate report for generative AI features in Discover. It does not include clicks or queries, and a property with few AI-feature impressions may not see the report yet.

Google also added a Search generative AI control (Settings → Search generative AI) that opts a site out of AI Overviews and AI Mode. Opting out removes those impressions and any traffic from them; Google states it is not a ranking signal elsewhere in Search. The practical split: keep using the Search performance report for queries and CTR, and use the new report to see which of your pages Google is already pulling into AI answers.

Paid tools worth the money

Tool	Price	Approx ₹/mo	Why you would buy it
Mangools (KWFinder)	$29.90/mo yearly · $49 monthly	~₹2,860–₹4,680	Best value. Keyword research, rank tracking and basic backlinks for a solo blog.
Semrush (SEO plan)	$139/mo ($117.33 annual)	~₹13,300	One of the largest databases and the best filtering by intent and question modifier.
SE Ranking (Core)	$129/mo ($103.20 annual)	~₹12,300	Similar scope to Semrush. White-label client reporting is the Agency Pack add-on (+$69/mo, annual billing only), not included at $129.
Ahrefs (Starter)	$29/mo (monthly only)	~₹2,800	Click-based estimates are more honest than raw volume. Starter is capped at 200 credits/month; Lite is $129/mo (~₹12,300).

What changed at Semrush in 2026 (and why the pricing page looks different)

Adobe completed its acquisition of Semrush on 28 April 2026 (an all-cash deal of about $1.9 billion, per Adobe's announcement); Semrush's customer FAQ says it continues as a standalone product with no immediate changes to billing or features. The old Pro, Guru and Business names are gone from the pricing page. As of September 2026 the public plans are SEO at $139/mo ($117.33 annual), Starter $199 ($165.17 annual), Pro+ $299 ($248.17 annual) and Advanced $549 ($455.67 annual); the three upper tiers bundle AI-search visibility tracking at 50, 100 and 200 tracked prompts per day. For a solo blogger the $139 SEO plan is still the one to compare against — the AI tiers only matter if you need to track brand mentions in ChatGPT or AI Mode.

Ahrefs Starter at $29/mo — the other cheap upgrade

Ahrefs Starter is $29/mo, monthly billing only, with 200 credits a month. Per Ahrefs' help centre it includes Site Explorer and Keywords Explorer (250 rows per report, one month of history), Site Audit, Rank Tracker for 50 keywords and the SEO Toolbar; additional users or credits cannot be bought, and Ahrefs says limits may change without notice. Lite is $129/mo ($1,584/yr on annual billing). Against Mangools: Starter is slightly cheaper but credit-capped and monthly-only, while Mangools includes rank tracking without a credit meter.

All prices in USD; rupee figures use ~₹95.6/USD (September 2026) and exclude bank forex markup and 18% GST where charged.[AFFILIATE_LINK: MANGOOLS] · [AFFILIATE_LINK: SEMRUSH] · [AFFILIATE_LINK: SE_RANKING]

A process that actually works

Tools give you candidates. This is how you turn candidates into pages worth writing.

Start from a question you can answer better than anyone. Not from a keyword list. Expertise is the only durable advantage a small site has.
Check Search Console for what you already almost rank for. Queries sitting at positions 8-20 are the cheapest wins on your entire site — the page exists, Google already shows it, it just needs to be better.
Expand with a tool. Take the topic and pull long-tail and question variants. Look for specificity, not volume.
Open the actual search results. This is the step people skip and the one that decides everything. Who ranks? Do their pages truly answer the query, or are they thin listicles? If you can visibly do better, difficulty scores do not matter.
Check intent before writing. If page one is all product pages, a blog post will not rank there no matter how good it is — and vice versa.
One primary keyword per page. Two pages targeting the same query compete with each other, and you lose both.

Why difficulty scores mislead

Every tool computes keyword difficulty differently, mostly from the backlink profiles of pages currently ranking. That means the same keyword routinely scores 25 in one tool and 48 in another, and neither number knows whether those ranking pages are actually good.

A “difficult” keyword whose page one is eight years old and badly written is an opportunity. An “easy” keyword owned by a brand with a dedicated product page is not. Read the results page. It takes thirty seconds and is more reliable than any score.

Keyword research vs prompt research: what the AI-search add-ons actually are

Every major vendor now sells “AI visibility” tracking next to keyword research. Semrush bundles tracked prompts into its Starter, Pro+ and Advanced plans and sells a standalone AI Visibility Toolkit at $99/mo per domain (billed annually) with prompt research and 25 daily-tracked prompts. SE Ranking sells an AI Search add-on at +$89/mo (+$71.20 annual) covering AI Overviews, AI Mode, Perplexity and ChatGPT visibility. Ahrefs offers a free AI Overviews Tracker and AI Mode Tracker among its free web tools.

What this data tells you is whether your brand or pages are being cited in AI answers. For a small site, the free Search Console Generative AI report already shows your AI Overview and AI Mode impressions at no cost — so a solo blog should not pay for prompt tracking before it has organic traffic worth protecting.

FAQ — keyword research

What is the best free keyword research tool?

Google Search Console, and it is not close — it shows the actual queries bringing impressions to your site, their average position and their click-through rate. No paid tool has that data about you. Google Keyword Planner adds volume ranges for keywords you do not rank for yet, and Ahrefs' free plan fills in basic competition checks.

Do I need to pay for a keyword research tool?

Not to start. A new site's problem is not finding keywords — it is having enough content and authority to rank for any of them. Free tools are sufficient for the first twenty or thirty posts. Pay once research speed genuinely limits how fast you can publish.

What is keyword difficulty and can I trust it?

It is each tool's estimate of how hard ranking on page one would be, usually scored 0-100 and driven mostly by the backlink profiles of pages already ranking. Treat it as a rough sort order, not a fact — the same keyword often scores very differently across tools because each uses its own index and formula.

How do I find low-competition keywords?

Look for longer, more specific queries with clear intent, and check the actual search results rather than trusting a score. If page one is full of forum posts, thin listicles and pages that do not directly answer the query, you can compete regardless of what the difficulty number says. If it is dominated by major brands with dedicated pages, move on.

Is Google Keyword Planner accurate?

It is accurate about what it measures, which is advertising demand in broad ranges. Without an active ad spend it buckets volumes coarsely — a keyword showing '1K-10K' could be either end. Use it for direction and relative comparison, not precision.

What is the cheapest paid keyword tool worth buying?

Mangools, at about $29.90/month on annual billing ($49 if you pay month to month). Its KWFinder does keyword research properly and the bundle includes rank tracking and basic backlink data with no credit meter. The alternative is Ahrefs Starter at $29/month — monthly billing only, capped at 200 credits a month, and you cannot buy extra credits or users. Either is roughly a fifth of Semrush's $139 SEO plan and covers what a solo blog actually uses.

Does Search Console show AI Overview traffic?

Partly. As of 31 August 2026, Google has rolled out a Generative AI performance report in Search Console to all websites worldwide. It shows impressions — how often links to your site appeared inside AI Overviews and AI Mode — broken down by page, country, device and date. It does not show clicks or queries, and a property with very few AI-feature impressions may not see the report at all.

How many keywords should one article target?

One primary keyword and whatever closely related variants fit naturally. Modern search engines understand synonyms and related concepts, so an article that answers a question thoroughly will rank for dozens of variations without you listing them. Writing separate thin posts for near-identical keywords creates cannibalisation, not coverage.

Should I target keywords with no search volume?

Sometimes, yes. Tools under-report volume for new topics, regional queries and anything phrased conversationally — and 'zero volume' often means 'below the tool's reporting threshold', not 'nobody searches this'. If a query is one your actual customers ask you, it is worth a page.

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