Top 20 Tax Resolution Companies by global ranking from alexa.com:

Position	Company	Traffic	Time in Business
1	Optima Tax Relief	824k	5 years
2 (↑ 17)*	US Tax Shield	883k	7 years
3	Tax Defense Network, taxreliefcenter.org	1.2m	10 years
4	IRS Medic	1.1m	7 years
5	StopIRSdebt.com	1.4m	6 years
6*	Community Tax Relief	1.7m	7 years
7*	Tax Resolution Institute	2m	20+
8*	Tax Tiger	2.3m	15 years
9	Alvin Brown, Attorney	2.4m	17 years
10	Top Tax Defenders	2.4m	7 years
11*	Tax Defense Partners	2.9m	19 years
12	Larson Tax Relief	3m	11 years
13*	Washington Tax Services (our company)	7.9m	28 years
14*	Joe Mastriano, CPA	3.8m	36 years
15*	Mike Habib, E.A.	4m	9 years
16*	Omni Financial	4.8m	19 years
17	Precision Tax Relief	5m	6 years
18*	Colonial Tax Consultants	5m	11 years
19*	Instant Tax Solutions	5.9m	8 years
20*	Ideal Tax Solutions	7.7m	6 years

Previous surveys: see who fell in and out of the top 20.

• Feb 2012 Tax Resolution Internet Ratings
• Sep 2014 Tax Resolution Internet Ratings
• April 2015 Tax Resolution Traffic Ratings
• Feb 2016 Tax Resolution Traffic Ratings

Five years later, four companies in 2012's top 20 are now closed. But 12 are still in the top 20 (marked by a * above): February 2012 - Tax Resolution Internet Ratings.

Strategic Tax Lawyers dropped from #1 last year to well off the Top 20 (marketing surge petered out). Lothamer, Freedom Tax Relief and JG Tax Group also dropped off the top 20.