Moz vs. Spyfu

I consider both Moz, Google AdWords, and Spyfu to be excellent tools when I do my research and with most keyword research tools you find online they all have different numbers.

Google AdWords I have always known to wildly inaccurate search volumes and I only use it to get keyword ideas. Rand Fishkin did some tests and wrote about it as well. You can read his post on “Why Google AdWords’ Keyword Volume Numbers Are Wildly Unreliable – Whiteboard Friday

I noticed individually the search volume numbers were usually a bit off between Moz and Spyfu so I decided to run a test on some keyword research I did and compared a little over 200 phrases that I would share below.

As I tell my customers I believe Moz to be more accurate for organic search results and I believe Spyfu to be more accurate for pay per click results. Of course, Google AdWords is supposed to be for pay per click results but I never trusted their numbers and only trust them for keyword phrase ideas to add to the list then paste them into Moz’s tool to get volume numbers.

To further complicate things Moz uses ‘Min Volume’ and ‘Max Volume’ while Spyfu uses ‘Local Searches’ and ‘Global Searches’. Can we really compare these two? Did Spyfu use these terms to make their numbers more plausible when compared to other tools like Moz and Google AdWords?

When comparing Moz’s ‘Min Volume’ to Spyfu’s ‘Local Searches’ we find the difference in numbers from 19 to over 49,000. When comparing Moz’s ‘Max Volume’ to Spyfu’s ‘Global Searches’ we find the difference in numbers from 40 to 468,000.

When comparing all of them together in the chart below you would think that the two ‘Difference’ columns would be relatively close from lowest to highest but it isn’t. It jumps around quite a bit.

Note: Moz’s n/a and the difference #value! could not be calculated because some of the keyword phrases are not in Moz’s index.

Analyzed 6/7/2019
Min Volume
Local Searches
Max Volume
Global Searches
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about digital marketing030301016001590
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advantages of digital marketing11110995019001850
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what is a digital marketing strategy112101995019001850
digital marketing future113203095019001850
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digital marketing expert113903795019001850
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digital marketing kpi113903795019001850
kpi digital marketing113903795019001850
digital marketing class114804695019001850
advantage of digital marketing01101101019001890
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what are digital marketing strategies02102101019001890
digital marketing funnel20172051950024001900
role of digital marketing1011706920024002200
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digital marketing roles111701595024002350
digital marketing website112602495024002350
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digital marketing mix090901024002390
website digital marketing02602601024002390
digital marketing channels20159038950029002400
freelance digital marketing17011900199290054002500
how to do digital marketing10126015920029002700
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digital marketing for dummies50188037985036002750
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benefits of digital marketing5121015910029002800
digital marketing seo5132026910029002800
digital marketing benefits112101995029002850
seo in digital marketing113203095029002850
digital channel marketing115905795029002850
benefits digital marketing02102101029002890
digital marketing plan20172051950036003100
digital marketing trends20172051950036003100
digital media marketing20188067950036003100
digital marketing analytics201100079950036003100
masters in digital marketing5172066910036003500
digital marketing planning117207095036003550
digital marketing plans117207095036003550
digital marketing trend117207095036003550
marketing digital media118808695036003550
master in digital marketing07207201036003590
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media digital marketing08808801036003590
digital marketing analysis0100010001036003590
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freelance digital marketer511900184910054005300
digital marketing tool117207095054005350
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blog digital marketing07207201054005390
marketing company online0160016001054005390
digital marketing consultant2011300109950066006100
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digital marketeer118918805066246574
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digital marketing strategies201240021995001210011600
digital marketing service51190018491001210012000
strategic digital marketing51240023491001210012000
digital marketing course online1116001589501210012050
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definition of digital marketing1119001889501210012050
digital marketing online course016001600101210012090
definition digital marketing019001900101210012090
digital marketing as a service019001900101210012090
digital strategy marketing024002400101210012090
strategies for digital marketing024002400101210012090
digital marketing company8513600274917001810016400
what is digital marketing43015400109965004050034000
what is digital marketing?101540052992004050040300
digital marketing is054005400104050040490
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what is the digital marketing054005400104050040490
digital marketing agency4301148001049965004950043000
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course in digital marketing036003600107400073990
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marketing digital29011900-10014300201000196700
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digital marketer430149500451996500368000361500
digital marketers11495004948950368000367950
digital markets11495004948950368000367950
digital marketing?0495004950010368000367990
benefit of digital marketingn/a210#VALUE!n/a2900#VALUE!
companies with digital marketingn/a3600#VALUE!n/a18100#VALUE!
course digital marketingn/a3600#VALUE!n/a74000#VALUE!
courses for digital marketingn/a3600#VALUE!n/a74000#VALUE!
digital business marketingn/a260#VALUE!n/a1300#VALUE!
digital market strategiesn/a2400#VALUE!n/a12100#VALUE!
digital marketer near men/a480#VALUE!n/a1000#VALUE!
digital marketing agency in usan/a140#VALUE!n/a1300#VALUE!
digital marketing benefitn/a210#VALUE!n/a2900#VALUE!
digital marketing company usan/a260#VALUE!n/a1300#VALUE!
digital marketing strategy.n/a2400#VALUE!n/a12100#VALUE!
digital marketing trainersn/a720#VALUE!n/a8100#VALUE!
digital marketing tutorialsn/a110#VALUE!n/a1900#VALUE!
digital marketing whatn/a5400#VALUE!n/a40500#VALUE!
digital real estate marketingn/a320#VALUE!n/a1000#VALUE!
ditgital marketingn/a644#VALUE!n/a4784#VALUE!
example digital marketing strategyn/a210#VALUE!n/a1600#VALUE!
marketing digital definicionn/a10#VALUE!n/a1300#VALUE!
marketing online servicen/a590#VALUE!n/a1900#VALUE!
service digital marketingn/a1900#VALUE!n/a12100#VALUE!
services of digital marketingn/a1900#VALUE!n/a12100#VALUE!
strategy for digital marketingn/a2400#VALUE!n/a12100#VALUE!
strategy of digital marketingn/a2400#VALUE!n/a12100#VALUE!
workshop on digital marketingn/a90#VALUE!n/a1000#VALUE!

Where does Moz get its data from?

According to the article on their website, their accuracy is at about 95%. They are using Russ Jones’ volume bucket methodology and adding in anonymized clickstream data from ~1 million real searchers in the US.

Where does Spyfu get its data from?

Spyfu says they use some of its data from Google AdWords as well but also says the search (volume) numbers are way off just like Moz did. They mention that they use their own in-house method using several different factors stating that, “freakishly right way more than we’re wrong.”

Here is another article that says Spyfu is right 90% of the time for ad budgets and SEO clicks. This article on their website gives more detail on how they come up with their numbers. Spyfu also sites when a company checked how accurate their data was and cited 79% then Spyfu explained how they improved the numbers since this study to bring it up to 90%.

My question is this. If one claims to be 95% correct and the other claims to be 90% correct why are the numbers when comparing the two so far off? Is it because one states they are min and max volume while the other call it local and global value?

Here is the definition of local and global searches from Spyfu:

Monthly Searches

This is the average number of times each month that Google users search this exact keyword, broken into local (country) search volume.

Monthly Searches

This is the average number of times each month that Google users search this exact keyword, broken into global (world-wide) search volume.

Here is the definition of min and max searches from Moz:

Volume ranges show you (with 95% or more accuracy) how often a term or phrase is searched for in Google each month.

Keyword Difficulty

When you compare the ranking difficulty between Moz and Spyfu here is what you find. I calculated this by using a percentage and the range became -52% to 62% difference. Another very large difference. You will also notice that overall there is not a gradual lowest to highest for Moz or Spyfu when sorted by the column ‘Percentage Difference’.

Analyzed 6/7/2019
SEO Difficulty
ditgital marketing6140-52.50%
digital marketeer5847-23.40%
define digital marketing6052-15.38%
digital marketing meaning6257-8.77%
digital marketing definition6157-7.02%
definition of digital marketing6157-7.02%
definition digital marketing5956-5.36%
what are digital marketing58614.92%
digital marketing plan template47506.00%
digital marketing is60646.25%
digital marketing what56606.67%
what is digital marketing57639.52%
what is the digital marketing596610.61%
media digital marketing576410.94%
what is digital marketing?576410.94%
digital media marketing627011.43%
digital market616911.59%
importance of digital marketing374211.90%
about digital marketing556312.70%
marketing digital media596914.49%
digital marketing news505915.25%
digital marketing trend445215.38%
why digital marketing is important384515.56%
digital marketer586915.94%
digital marketing?617417.57%
role of digital marketing415018.00%
digital marketing607418.92%
the future of digital marketing384719.15%
digital marketing future394920.41%
digital marketing vs traditional marketing232920.69%
future of digital marketing384820.83%
content digital marketing496220.97%
digital marketing tools445621.43%
digital marketing trends405121.57%
digital marketing content476021.67%
digital markets526722.39%
digital marketing tool445722.81%
online digital marketing course476122.95%
power digital marketing455923.73%
digital marketers537024.29%
future digital marketing395225.00%
benefits of digital marketing304025.00%
traditional marketing vs digital marketing233125.81%
digital marketing trainers405425.93%
digital marketing tips415626.79%
digital marketing videos385226.92%
example digital marketing strategy405527.27%
digital marketing plans375127.45%
why digital marketing425827.59%
learn digital marketing446127.87%
digital business marketing486728.36%
strategic digital marketing456328.57%
digital marketing courses online476628.79%
how to do digital marketing425928.81%
digital marketing strategy examples395529.09%
digital marketing tutorial365129.41%
digital marketing course online486829.41%
tips for digital marketing385429.63%
course digital marketing507230.56%
new digital marketing456530.77%
benefits digital marketing294230.95%
marketing digital517431.08%
online digital marketing courses487031.43%
digital marketing case studies263831.58%
online digital marketing classes456631.82%
digital marketing tutorials385632.14%
digital content marketing405932.20%
digital marketing online course487132.39%
digital marketing courses507432.43%
digital marketing for dummies pdf355232.69%
digital marketing class477032.86%
digital marketing introduction365433.33%
digital marketing course487233.33%
courses in digital marketing487233.33%
courses on digital marketing487233.33%
benefit of digital marketing284233.33%
digital marketing online477133.80%
course of digital marketing477133.80%
social media marketing courses online426434.38%
kpi digital marketing324934.69%
digital marketing blog284334.88%
digital marketing online class467135.21%
digital marketing objectives294535.56%
course in digital marketing477335.62%
online digital marketing457035.71%
digital marketing for dummies365635.71%
digital marketing planning365635.71%
digital marketing case study253935.90%
digital marketing for b2b325036.00%
what is a digital marketing strategy406336.51%
strategy for digital marketing406336.51%
digital marketing mix335236.54%
b2b digital marketing314936.73%
advantages of digital marketing243836.84%
digital marketing analyst365736.84%
digital marketing analytics416536.92%
marketing digital definicion294636.96%
digital marketing basics345437.04%
what are digital marketing strategies396237.10%
digital marketing training396237.10%
digital marketing classes online447037.14%
digital strategy marketing447037.14%
types of digital marketing274337.21%
digital marketing kpi325137.25%
digital marketing platforms375937.29%
digital marketing articles355637.50%
digital market strategies406437.50%
digital marketing platform386137.70%
digital marketing campaign335337.74%
digital marketing benefits284537.78%
courses for digital marketing447138.03%
digital marketing services294738.30%
digital marketing course near me457338.36%
digital marketing strategy406639.39%
digital marketing strategy.406639.39%
digital marketing podcast355839.66%
strategy of digital marketing386339.68%
what is digital marketing strategy396540.00%
digital marketing classes447440.54%
digital marketing trainer355940.68%
digital marketing as a service325440.74%
digital marketing advantages264440.91%
digital marketing b2b305141.18%
blog digital marketing305141.18%
digital marketing plan345841.38%
digital marketing businesses396741.79%
strategies for digital marketing396741.79%
companies with digital marketing396741.79%
digital marketing pdf295042.00%
digital marketing work376442.19%
digital marketing strategist305242.31%
services of digital marketing305242.31%
digital marketing strategies396842.65%
digital marketing benefit295143.14%
digital marketing specialist346043.33%
digital real estate marketing305444.44%
marketing online service407345.21%
digital marketing conference305545.45%
digital channel marketing305545.45%
digital marketing analysis315745.61%
advantage of digital marketing254645.65%
digital marketing freelance336145.90%
digital marketing funnel275046.00%
digital marketing service285246.15%
digital marketer conference295446.30%
digital marketing roles295446.30%
website digital marketing458446.43%
digital marketing consulting315846.55%
digital marketing specialists336246.77%
digital marketing for business356646.97%
digital marketing blogs275147.06%
funnel digital marketing285347.17%
digital marketing conferences285347.17%
business digital marketing356747.76%
digital marketing near me397648.68%
digital marketing workshop244748.94%
digital marketing for real estate265149.02%
digital marketing consultants295749.12%
master in digital marketing326349.21%
digital marketing website428349.40%
digital marketing real estate255050.00%
real estate digital marketing255050.00%
digital marketing agency near me397850.00%
introduction to digital marketing275450.00%
digital marketing funnels275450.00%
digital marketing channels275450.00%
freelance digital marketing316250.00%
digital marketing freelancer306050.00%
workshop on digital marketing224450.00%
marketing company online408150.62%
digital marketer near me397950.63%
digital marketing company387750.65%
digital marketing agency387750.65%
digital marketing software346950.72%
seo in digital marketing346950.72%
digital marketing expert285750.88%
digital marketing agencies387851.28%
digital agency marketing377651.32%
seo digital marketing357251.39%
digital marketing seo347051.43%
masters in digital marketing326651.52%
online marketing agency418551.76%
service digital marketing285952.54%
digital marketing solution255352.83%
freelance digital marketer286053.33%
marketing digital agency367954.43%
digital marketing firm398654.65%
online marketing company368055.00%
digital marketing solutions276155.74%
digital marketing consultant276155.74%
digital marketing agency us368356.63%
agency digital marketing358156.79%
master digital marketing317357.53%
digital marketer agency348158.02%
digital marketing strategy pdf184358.14%
digital marketing books235558.18%
master of digital marketing307358.90%
digital marketing consultancy225459.26%
internet marketing agency358659.30%
digital marketing experts246060.00%
digital marketing agency usa338460.71%
web marketing agency348760.92%
digital marketing company usa328260.98%
digital marketing agency in usa328461.90%
digital marketing company in usa318262.20%

I would be very interested in your comments below about these findings and what you think of the two is the most accurate?

[Total_Soft_Poll id=”2″]



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