Which is the best SEO tool and why?
 

Which is the best SEO tool and why?

1. Ahrefs - Competitor Research Tools & SEO Backlink Checker
2. AntRanks - Keyword Rank Tracking in Search Engines
3. AuthoritySpy - The Influencer & Authority Blog Search App | AuthoritySpy
4. AWR - AWR: SEO Software, Website Rankings and Research Tools
5. Broken Link Checker - Free Broken Link Checker
6. Buzzstream - Link Building and Digital PR Tools - BuzzStream
7. Crazyegg - Visualize where your visitors click
8. gShift - SEO Analytics and Reporting Software | gShift Products
9. Keywordsuggest - http://Keywordsuggest.io
10. Keyword Tool - Keyword Tool: 750+ Google Keyword Suggestions for Free. Use 192 Google Domains & 83 Languages
11. MajesticSEO - Marketing Search Engine and SEO Backlink Checker
12. Moz - Moz | SEO Software, Tools & Resources for Smarter Marketing
13. Optimizely - Optimizely: The World's Leading Experimentation Platform
14. RankWatch - Rank Monitoring Software - RankWatch.com
15. Raven Tools - Automated Marketing Report Software and Technical SEO Audits
16. SEMrush - service for competitors research, shows organic and Ads keywords for any site or domain
17. Similarweb - Similarweb.com - Digital World Market Intelligence Platform
18. Smallseotools - 100% Free SEO Tools
19. Screaming Frog - SEO, Search Engine Marketing & Optimisation Agency - Screaming Frog
20. Site Analyzer - Website Analysis and SEO Tools
21. Topvisor - Topvisor
22. Woorank - WooRank.com | SEO Checker - Website Review
23. Yoast - SEO for everyone - Yoast

SpyFu. Bottom Line: SpyFu is a well-designed SEO tool packed with metrics and features specifically geared toward sales, online marketing, and digital advertising. ...
SEMrush. ...
AWR Cloud. ...
KWFinder.com. ...
Moz Pro. ...
Searchmetrics Essentials. ...
Ahrefs. ...
LinkResearchTools.

Thanks @erieki for the awesome list.

Google Analytics and Google search console is the best tool

Copyscape: to check the duplicate content
Backlink watch: to check the backlinks of your website or your competitor's
Google Keyword Planner: for keyword research
Screaming Frog: website audit
Google Analytics: to check website traffic
Google Webmaster tool: for indexing, to fix crawl errors, to check website insights

Ahref and copyscape are the best tools.

Google webmaster,Google analytics,Copyscape,ahref,backlink watch

SEMrush, Google Keyword Planner, KeywordTool.io, Open Site Explorer, LinkPatrol, Broken Link Checker, Rel NoFollow Checkbox, SEOquake.

Google PageSpeed Insights.
Moz Local Listing Score.
Keywordtool.io.
Google Analytics.
Google Webmaster Tools + Bing Webmaster Tools.
Open Site Explorer.
Google Keyword Planner.
Google.com in an Incognito Window.