SEO Tools: Keywords, Competitive Research, and Backlinks

Tools

Ahrefs (free trial))
Answer The Public
Bing Webmaster Tools (free)
BloomBerry – crawls sites where people ask questions
BuzzSumo (limited free. Able to see what is popular on social media)
Cognitive SEO (Offerings include free Keyword Tool)
Google
- First page of Google Search: What is coming up in search results? (aka “SERPs”)
- Google auto-suggest / auto-complete
- Adwords Keyword Planner (need to set up Adwords, but can benefit without launching campaign)
- Trends (free)
Hubspot SEO (paid)
Keyword Density Checker (free)
Keywords Everywhere Tool (free)
Keyword Tool
KWFinder / SerpWatcher (some features currently free)
Import.io (no free version)
LSI Graph (latent semantic indexing)
- Related: WordPress Plugin SEOPressor (paid)
Long Tail Pro (free trial)
Mozbar (free trial)
Rank Tracker (free trial)
Raven Tools (free trial)
Screaming Frog (free — depending on site size)
SEMrush (some free functionality)
- Reverse Engineering Your Competitors’ Backlinks with SEMrush
SE Ranking Keyword Grouper (paid)
SEO SpyGlass (free download)
SEObar / SEOQuake (free)
SERPS.com (free trial)
SerpStat (free trial)
SerpWatcher
SpyFu (may be able to obtain some data for free; includes Keyword Kombat)
UberSuggest (free)
WordStream (free trial)
- Wordstream Keyword Grouper (free)
WordTracker (free trial)

NOTE: “Free trial” correct as of August, 2017