Check from here the back links of your competitors can greatly improve the position of your own website on Google and other search engines.

1. HOW TO FIND YOUR COMPETITORS
BACKLINKS
http://seo-linkbuilding-lists.blogspot.in/2014/07/how-to-find-your-competitors-backlinks.html
Backlink checker online tool
1. AHREFS:
Website : Https://Ahrefs.Com
Access : Free
Free Version : Up To 10 Backlinks per Report
UpTo 3 Reports per Day
2. ALEXA:
Website :http://www.alexa.com
Access : Paid
3. BACKLINKTEST.COM:
Website :http://www.backlinktest.com
Access : Free
Free version :As Many Backlinks as There Are in Their Index
4. BACKLINK WATCH:
Website : http://backlinkwatch.com
Access : Free & Paid
Free version : Up To 25 Backlinks per Report

2. 5. BUSINESS-CONNECT.DE
Website : http://www.european-business-connect.de/backlinkchecker.php
Access : Free
Free version : Up To 2,500 Backlinks per Report
6. LINK PAD:
Website : http://www.linkpad.ru
Access : Free
Free version : Up To 5,000 Backlinks per Report
7. MAJESTIC SEO:
Website : http://www.majesticseo.com
Access : Free & Paid
Free version : Up To 2,500 Backlinks per Report for Verified Domains Only (I.E You
Must Be the Owner of the Domains)
8. MONITOR BACKLINKS - FREE BACKLINK CHECKER SEO TOOL
Website : http://monitorbacklinks.com/seo-tools/free-backlink-checker
Access : Free
Free version : Up to 300 backlinks per report
Up to 2 reports per week
9. MOONSEARCH:
Website : http://moonsearch.com
Access : Free

3. Free version : As Many Backlinks as There Are in Their Index
10. OPENLINKPROFILER:
Website : http://www.openlinkprofiler.org
Access : Free
Free version : Shows Online up To 200,000 Backlinks per Report
Up To 100,000 Backlinks Can Be Exported In CSV-Format, but A Free or Paid
Account Is Required For the Export
11. OPEN SITE EXPLORER:
Website : http://www.majesticseo.com
Access : Free & Paid
Free version : Up To 1,000 Backlinks per Report
LimitedFunctionality
12. RANKSIGNALS.COM
Website :http://www.ranksignals.com
Access : Free
Free Version : As Many Backlinks As There Are In Their Index
13. SEARCH METRICS SUITE - BACKLINK CHECK & ANALYSIS TOOL
Website :http://suite.searchmetrics.com/en/research/links/backlink-analysis/
Access : Free & Paid
Free Version : Up To 10 Backlinks per Report without Registration
Up To 500 Backlinks per Report with a Free Account

4. 14. SEMRUSH (BETA)
Website : http://en.seokicks.de/
Access : Free & Paid
Free Version : Up To 50 Backlinks per Report
15. SEOprofiler
Website : http://www.seoprofiler.com
Access : Free & Paid
Free Version : Up To 200,000 Backlinks per Report
16. SHEER EXPLORER
Website : http://sheerexplorer.com
Access : Free
Free Version : As Many Backlinks As There Are In Their Index
17. SITE EXPLORER
Website : http://siteexplorer.info
Access : Free
Free Version : As Many Backlinks As There Are In Their Index
18. SMALLSEOTOOLS.COM
Website : http://smallseotools.com/backlink-checker
Access : Free
Free Version :Up To 1000 (?) Backlinks per Report
19. WEB SEO ANALYTICS

5. Website : http://www.webseoanalytics.com
Access : Free & Paid
Free Version : Up To 1,000 Backlinks per Report, Up To 1 Report per Day
20. WebMeUp
Website : http://webmeup.com
Access : Paid
21. WebMeUp backlink tool (beta)
Website : http://webmeup.com/tools/backlinks.html
Access : Free
Free Version : Shows Online Up To 1,000 Backlinks Per Report All Found Backlinks (As
Many As There Are In Their Index) Can Be Exported In CSV-Format, But A Trial Or Paid
Account Is Required For The Export.
If You Know Some More Backlink Checkers Share Here....