Best Free Keyword Research and Clustering Tools in 2026
A shortlist of free keyword research tools and keyword clustering tools for 2026: expand queries, group by intent, and pick what fits before you ship pages.
Short answer: the best free keyword research tool in 2026 is the one that matches the step you are stuck on. Use Orchory's free AI keyword research tool to expand a seed topic, Orchory's free keyword clustering tool to group a pasted list, Google Search Console for queries you already earn, and Google Keyword Planner for campaign-style volume ranges. Paid suites (Ahrefs, Semrush) still offer useful free tiers for discovery, but none of them ship the page for you.
This shortlist covers free keyword research tools and keyword grouping tools, not AI visibility trackers or full-site AI SEO agents. It is a tools inventory with an honest Orchory placement: strong for research-to-queue work, not a substitute for every analytics job. List prices below are what vendors publish today; tiers change, so confirm on the vendor site before you buy.
TL;DR comparison table
| Tool | Free tier | Best for | Clustering / grouping |
|---|---|---|---|
| Orchory AI keyword research | Yes, no account | Seed-topic expansion into an opportunity-style map | Intent-style grouping in the research output |
| Orchory keyword clustering | Yes, no account | Paste a list, export grouped clusters | Deterministic clustering on your list |
| Google Search Console | Yes | Queries and pages you already rank for | Manual grouping in exports |
| Google Keyword Planner | Yes with a Google Ads account | Idea expansion and volume ranges | Manual only |
| Ahrefs free tools | Limited free reports | Backlink and keyword snapshots | Paid product feature set |
| Semrush free account | Limited daily searches | Competitive keyword snapshots | Topic research in paid tiers |
| AnswerThePublic / AlsoAsked | Free runs with caps | Question and modifier expansion | Manual grouping |
Pick a tool by the job, not by a fake ranking
Most "best keyword research tool" lists mix discovery, rank tracking, content writing, and publishing into one score. That hides the real bottleneck. Use this decision path instead:
- Expand: You need more candidate queries from a seed topic or competitor set.
- Validate: You need proof a query is worth a page (impressions, clicks, or stable volume).
- Cluster: You need one URL per intent so pages do not cannibalize each other.
- Ship: You need the queue to become a brief, template change, or pull request.
Free tools usually stop before step four. That is fine when developers still review every merge. When the gap is execution, read the keyword research planner pipeline and the auto SEO tool workflow for how research connects to git, not another export.
Orchory free keyword and clustering tools
Orchory is included here because it ships two first-party free tools that match this search intent, not because it wins every SEO category.
Free AI keyword research tool
The free AI keyword research tool takes a seed topic and returns a structured map you can sanity-check before you commit a page. It is aimed at founders who want a ranked view without signing into a full suite. Run it when you are deciding what belongs in the next sprint, then cross-check anything expensive with Search Console or a second source.
Free keyword clustering tool
The free keyword clustering tool is the keyword grouping tool for lists you already have: paste terms, review clusters, export CSV. It uses deterministic rules rather than a black-box score. Pair it with the keyword clustering guide when you need SERP-overlap logic or GSC-driven prioritization, not just string similarity.
When Orchory is the wrong fit
Orchory does not replace a backlink index, a rank tracker, or an AI visibility checker. If you only need to spy on a competitor's anchor text or monitor AI answer share, use the tools built for those jobs. If you need research, clustering, and a coding-agent handoff in one loop, see the Orchory AI SEO agent and send your site when you want the first page built with you on a call. Orchory Pro is $990/mo, one plan, cancel anytime, with every change still merged by a human.
Google Search Console
Search Console is the best free keyword research input for sites that already get impressions. The Performance report shows queries, pages, clicks, and average position for your property. Export the queries that match a page you plan to build or expand, then cluster manually or with the free clustering tool.
It will not invent demand you do not have yet. Treat it as validation and prioritization, not as the only expansion source. The keyword research guide walks through mixing GSC with other inputs without turning exports into shelfware.
Google Keyword Planner
Keyword Planner remains the default free expansion surface inside Google's ads ecosystem. You get idea lists and volume ranges tied to Google Ads accounts. Google's own documentation frames it as planning support, not a content calendar.
Known limit: broad volume buckets and campaign-centric grouping. Use Planner to widen a seed list, then run clustering and business-fit checks before you open a pull request. Do not treat its ranges as precise traffic promises.
Ahrefs free tools
Ahrefs publishes several free reports (backlink checker, limited keyword views) useful for quick competitive snapshots. The full keyword research and clustering workflow lives in paid plans with the depth teams expect from a research suite.
Choose Ahrefs when backlink and SERP intelligence matter more than a fast free queue. Choose Orchory when the missing step is turning ranked opportunities into reviewed code. The Orchory vs Ahrefs comparison spells out that split without pretending either product replaces the other.
Semrush free account
Semrush's free tier gives a small daily allowance of reports across SEO and adjacent modules. It is enough to sample keyword ideas and competitor overlap, not enough to run a whole content program without upgrading.
Topic and keyword grouping features scale with paid access. If you live inside Semrush dashboards today, keep using them for discovery; if your bottleneck is shipping pages from git, compare the handoff in the Semrush alternative page instead of buying another export habit.
AnswerThePublic and AlsoAsked
Question miners excel at modifier and FAQ-style expansion: how, why, versus, and preposition variants around a head term. Free runs are capped, which is still useful for outline and FAQ sections on a page you already plan to ship.
They are weak clustering tools on their own. Export questions, merge duplicates, then run intent grouping in a clustering tool or the spreadsheet workflow from the clustering guide.
Other free starters worth a look
- Ubersuggest (free tier): quick keyword ideas and content prompts with daily limits.
- Google Trends: seasonality and regional interest, not page-level difficulty.
- Autocomplete and People Also Ask: manual but free; good for checking intent before you write headings.
- Orchory free tools hub: one index for research, clustering, and supporting checks without mixing them into a geo audit flow.
None of these replace a documented keyword research workflow for SaaS if you sell B2B software. They shorten the path to a defensible queue.
How this list differs from agent and visibility roundups
Three intents often get mashed together in SEO content:
- Keyword research and clustering tools (this page): expand, group, and prioritize queries.
- AI SEO agents: end-to-end workflows that aim at drafts, CMS changes, or pull requests. See the best AI SEO tools by output guide when execution shape is the question.
- AI visibility tracking: measure whether assistants name your brand. That is a monitoring job, not a keyword grouping job.
If you landed here while trying to audit a competitor's ranked terms on their domain, that is a method page, not this shortlist. Use the free keyword checker for any website workflow for that investigation, then return here when you need tools to build your own queue.
Ready to test Orchory without a dashboard migration? Start with the free AI keyword research tool or the keyword grouping tool. When the queue looks right, request your first page or explore the full AI SEO agent loop.
