For marketers and business owners looking to improve their search visibility without spending a dime, free keyword research tools are essential. The five picks in this list — Ahrefs, SEMrush, Wope, Scalenut, and Astro — each offer a way to start researching keywords at no cost. Whether through a permanent free tier or a generous free trial, these tools provide actionable data to inform content strategy and SEO decisions.
This guide is designed for anyone who needs reliable keyword insights but isn’t ready to commit to a paid subscription. From seasoned SEO professionals to startup founders exploring organic growth, each tool on this list offers a genuine free option. Use the rankings below to compare features, free plan limits, and where paid plans begin.
How we picked these keyword research tools
We evaluated each candidate based on the depth of its free offering, the quality of keyword data provided, and how well it serves the core use case of uncovering search terms. Tools with a permanent free plan or a no-cost trial that gives meaningful access were prioritized. We also considered feature breadth, ease of use, and the clarity of pricing tiers. The result is a balanced set of tools that cater to different workflows — from pure keyword discovery to integrated content creation.
Related shortlists: 5 Best Keyword Research Tools in 2026 and Top 7 Free AI Sales Tools in 2026.
Also worth a look: Top 5 Keyword Research Tools for Small Teams in 2026 and 5 Best Keyword Research Tools in 2026.
| Tool | Best for | Key features | Pricing | Free trial |
|---|---|---|---|---|
| Ahrefs | marketers and SEOs who need reliable keyword data across multiple search engines without upfront cost | Keywords Explorer, Matching terms, SERP overview | Free — Ahrefs Free tier for basic keyword data | Free plan |
| SEMrush | content teams and paid-search analysts who want keyword research paired with competitive and ad metrics | Keyword Magic Tool, Keyword Gap, Keyword Difficulty | Free — 1 demo project, 10 reports a day | 7-day free trial |
| Wope | budget-conscious teams looking for a clean, affordable keyword tool with a generous free trial | Keyword research, Rank tracking, Competitor analysis | Basic — $27/month | 14-day free trial, no credit card required |
| Scalenut | content creators who want to move seamlessly from keyword research to AI-assisted writing | Keyword planner, NLP topic research, Content optimization | Starter — from $24/month billed annually | 7-day free trial |
| Astro | Apple app developers who need precise App Store keyword data and daily rank tracking | Keyword popularity data, Keyword suggestions, Competitor keyword extraction | Single Mac License — $9/month billed annually ($108/year) | No free trial (14-day money-back guarantee) |
The best keyword research tools in 2026
Each tool below stands out for its free access model and the specific strengths it brings to keyword research. The following entries detail what you get for free, the standout features, and who each tool suits best.
1. Ahrefs
Online SEO tools developer
Ahrefs is best for: marketers and SEOs who need reliable keyword data across multiple search engines without upfront cost
Ahrefs offers a genuinely free tier with basic keyword data, including search volume and difficulty. Its Keywords Explorer covers more markets than most rivals. Ideal for those who want a trusted name in SEO with no payment required.
Key Ahrefs features
- Keywords Explorer — search volume, difficulty and click data for any keyword worldwide
- Matching terms — related, phrase-match and question keyword ideas at a glance
- SERP overview — see exactly which pages already rank and why
- Rank Tracker — monitors keyword positions by location and device over time
- Content Gap — finds keywords competitors rank for that a site is missing
Ahrefs pricing
- Free — Ahrefs Free tier for basic keyword data
- Starter — from $29/month
- Lite — from $129/month
- Standard, Advanced and Enterprise — scale up to $1,499+/month
- Free trial: Free plan
2. SEMrush
Get measurable results from online marketing
SEMrush is best for: content teams and paid-search analysts who want keyword research paired with competitive and ad metrics
SEMrush's free plan includes one demo project and 10 reports daily, giving access to the Keyword Magic Tool and Keyword Gap. It combines organic and paid-search insights, making it a strong choice for integrated campaigns.
Key SEMrush features
- Keyword Magic Tool — millions of keyword ideas grouped by topic and intent
- Keyword Gap — compares up to five domains to find missed keyword opportunities
- Keyword Difficulty — scores how hard a term is to rank for before committing time
- Position Tracking — daily rank monitoring by keyword, device and location
- Topic Research — surfaces subtopics and questions around any seed keyword
SEMrush pricing
- Free — 1 demo project, 10 reports a day
- SEO — from $117/month billed annually
- Pro+ — from $248/month billed annually
- Advanced — from $456/month billed annually
- Free trial: 7-day free trial
3. Wope
New Generation of Marketing Suite
Wope is best for: budget-conscious teams looking for a clean, affordable keyword tool with a generous free trial
Wope provides a 14-day free trial with full access to keyword research, rank tracking, and competitor analysis. Its interface is designed for non-specialists. It's a cost-effective alternative to pricier suites.
Key Wope features
- Keyword research — search volume, difficulty and intent in one view
- Rank tracking — monitors keyword positions across target markets daily
- Competitor analysis — benchmarks keyword visibility against named rivals
- AI content tools — turns a researched keyword straight into a content brief
- Clean interface — built to be usable without specialist SEO training
Wope pricing
- Basic — $27/month
- Starter — $55/month
- Growth — $137/month
- Elite — $275/month
- Free trial: 14-day free trial, no credit card required
4. Scalenut
AI that powers your entire content lifecycle
Scalenut is best for: content creators who want to move seamlessly from keyword research to AI-assisted writing
Scalenut offers a 7-day free trial that includes its keyword planner and NLP topic research. It scores drafts against target keywords and can generate AI content. Best for those who need an all-in-one content workflow.
Key Scalenut features
- Keyword planner — search volume and clustering for any seed keyword
- NLP topic research — related terms and questions pulled from top-ranking pages
- Content optimization — scores drafts against the keywords they are meant to target
- AI writing — drafts content built directly from the researched keyword brief
- One-click publishing — pushes the finished, optimized content live
Scalenut pricing
- Starter — from $24/month billed annually
- Plus — from $36/month billed annually
- Professional — from $80/month billed annually
- VIP Service — custom pricing
- Free trial: 7-day free trial
5. Astro
App Store Optimization Tool for Apple Developers
Astro is best for: Apple app developers who need precise App Store keyword data and daily rank tracking
Astro focuses exclusively on the Apple App Store, pulling keyword popularity from Apple Search Ads. It includes competitor keyword extraction and covers over 60 countries. A 14-day money-back guarantee lets developers test it risk-free.
Key Astro features
- Keyword popularity data — sourced from Apple Search Ads for accuracy
- Keyword suggestions — surfaces terms a listing is not yet targeting
- Competitor keyword extraction — see exactly what rival apps rank for
- Daily rank tracking — across iOS, iPadOS, Mac, tvOS and watchOS
- Keyword translations — research covers more than 60 countries and stores
Astro pricing
- Single Mac License — $9/month billed annually ($108/year)
- Unlimited keywords and apps included, no per-keyword fees
- Free trial: No free trial (14-day money-back guarantee)
Which keyword research tools should you choose?
If you need a reliable, no-cost starting point for general keyword research, Ahrefs offers the most trusted free tier with basic data across multiple search engines. For teams that want to blend organic and paid-search insights, SEMrush provides a generous free plan with competitive analysis. Content creators who want to research keywords and immediately draft articles will find Scalenut‘s free trial ideal for testing its AI writing integration.
Budget-conscious teams or those new to SEO should start with Wope‘s 14-day free trial, which offers a clean interface and full feature access. Apple app developers, meanwhile, have a dedicated option in Astro, whose money-back guarantee allows thorough testing of its App Store keyword tools. Each pick provides a genuine path to free keyword research, so choose based on your specific workflow and platform needs.
