If you only need to fix your own site: Sitebulb. It comes out ahead of Moz Pro.
Tool buying guideshortlist
Best SEO software for small businesses
BEST FITFor most small businesses: Ahrefs. It comes out ahead of Semrush. Our criteria barely separate these two. What does, and we do not measure it: Link index depth. We do not measure index size — nobody can from outside — so it does not move our ranking. It is nevertheless the reason most people choose this one over the other. Market and advertising data: traffic estimates for sites you do not own, and what competitors spend on paid search. We do not measure either, so neither moves our ranking — but if that is what you are buying, this is the one that has it.
How to use this guide
Start with the recommendation and the business situation it fits.Check when another tool becomes the better choice.Use the comparison table when pricing units, limits, or another trade-off could change the choice.
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Watch this decision
Currently watching the facts used by Best SEO software for small businesses. We send one email only when a published fact or calculation used here changes.
Buyer decision
Buyer-first recommendationA team that already runs weekly keyword and competitor checks and wants one tool that covers all of them.
Walk away if: You need one job done — a crawl, or rank tracking — and nothing else. You would pay for a suite to use a tenth of it.
Semrush: The entry tier is the most expensive of the four verified for this comparison, and its published rate assumes annual billing — the month-to-month rate is higher. Checked Aug 21, 2026 on the vendor's page.
Backlink work above everything else — the index is the reason people pay for this one.
Walk away if: Several people need to run reports. Seats and credits are both limited, and the second person costs more than the first.
A small business that wants rank tracking and site health without a suite's price.
Walk away if: Backlink discovery is the job. The gap with Ahrefs shows up exactly there.
Technical audits on sites you own, at a price that does not assume a whole SEO team.
Walk away if: You expected keyword research or rank tracking. Neither is here, at any tier.
Nobody will act on what the tool reports. An SEO tool tells you what to change; it does not change it. If no one owns publishing the fix, you are paying for a monthly reminder.
Publisher evidence and limits are used where they support the choice; unsupported claims stay out of the recommendation.
Use this evidence when
Which option fits this buyer, using only what these vendors publish?
◇ The answer holds for the source-backed evidence this guide names and compares — nothing beyond it.
◇ The answer section gives conditional picks from source-backed vendor evidence, even though no computed comparison graphic is drawn yet.
◇ The comparison table adds real cost, free tier, user / collaboration limits, billing / transaction limits, integrations / addons, plan limits, collaboration fit, capability fit and usage limits where vendor evidence supports it.
· Every dimension this decision needs has source-backed evidence on this page.
│ The answer changes when the buyer condition moves onto a different observed dimension, limit, billing unit, or proven breakpoint.
Decision-changing axes
What can change the answerChanges the answer when per-seat pricing or user access makes the cheap-looking option expensive.
Supported by the vendor evidence used on this page.Changes the answer when invoices, payments, transactions or card volume create operating cost.
Supported by the vendor evidence used on this page.Changes the answer when the tool has to fit an existing stack or paid add-ons move the real cost.
Supported by the vendor evidence used on this page.Changes the answer when the cheapest plan excludes the limit, tier or capability the buyer needs.
Supported by the vendor evidence used on this page.Price history by plan
US$139/monthCurrent price, checked 29 Aug 2026.
semrush · Published entry price · Seats · 1 seat: Checked 2 times at the source, 21 Aug 2026 to 29 Aug 2026. A price trend needs at least 3 dated checks; this one has 2 so far.
Evidence coverage for semrush · Published entry price · Seats · 1 seat: 2 readings · latest read 29 Aug 2026 · semrush.com
US$129/monthStable price21 Aug 2026 - 22 Aug 2026Observed period3Dated readings
Observed price stable at US$129/month across 3 dated readings from 21 Aug 2026 to 22 Aug 2026.
Evidence coverage for ahrefs · Published entry price · Seats · 1 seat: 3 readings · latest read 22 Aug 2026 · ahrefs.com
US$99/monthStable price21 Aug 2026 - 22 Aug 2026Observed period3Dated readings
Observed price stable at US$99/month across 3 dated readings from 21 Aug 2026 to 22 Aug 2026.
Evidence coverage for moz-pro · Published entry price · Seats · 1 seat: 3 readings · latest read 22 Aug 2026 · moz.com
US$18/monthStable price21 Aug 2026 - 22 Aug 2026Observed period3Dated readings
Observed price stable at US$18/month across 3 dated readings from 21 Aug 2026 to 22 Aug 2026.
Evidence coverage for sitebulb · Published entry price · Seats · 1 seat: 3 readings · latest read 22 Aug 2026 · sitebulb.com
Side by side
Evidence behind the choiceSemrushUS$139/month
The entry tier is the most expensive of the four verified for this comparison, and its published rate assumes annual billing — the month-to-month rate is higher.
Publisher fact checked Aug 29, 2026View at Semrush ↗Official sourceAhrefsUS$129/month
Credits are consumed by report views, so the usable amount of work per month is capped in a way the headline price does not show.
Publisher fact checked Aug 21, 2026View at Ahrefs ↗Official sourceMoz ProUS$99/month
Its index is smaller than the two above it, which matters most on competitor and backlink work rather than on your own site.
Publisher fact checked Aug 21, 2026View at Pxf ↗Paid linkSitebulbUS$18/month
It crawls and audits. It does not track rankings and does not carry a keyword or backlink index, so it replaces one part of a suite, not the suite.
Publisher fact checked Aug 21, 2026View at Sitebulb ↗Official sourcePrices are shown only when the source gives enough evidence for the buyer to act.
Don't buy anything if…
You have fewer than about twenty pages. At that size a free crawl and Search Console cover the same ground, and the gap only opens once there is more site than you can hold in your head.
You are buying it to prove SEO works to someone else. A dashboard convinces nobody who was not already convinced, and it costs the same as the work it is replacing.
Questions people actually ask
What decides between two tools?
We name the criterion that decides, not a number. Saying a tool is ahead on entry price and on the cost of a second seat, and level on everything else, tells you whether the comparison applies to you. A single figure on a scale we invented does not — and we used to publish one.
What does “entry price” leave out?
The billing term, most often. Several of these publish the annual-commitment rate as the headline number, and paying month to month costs materially more. It also leaves out seats: on two of them the second person costs as much as the first.
Proof trail
● Official vendor and pricing pages checked 2026-08-21.
Visible claims keep their source and check date; Advisor calculations stay marked separately.