TL;DR
Ahrefs' backlink index runs roughly 35 trillion external links refreshed every 15-30 minutes, and its 2026 repricing added a $29/month Starter tier while pushing its core Lite plan to $129/month for just 5 projects and 750 tracked keywords. Semrush costs more up front at $139/month for its SEO plan (5 websites, 500 keywords tracked daily), but bundles the broadest feature set across SEO, PPC, content, and AI-visibility tracking in one suite. Moz Pro is the cheapest full entry point at $49/month and is positioned as the most approachable option, though it scores lower on link building than Ahrefs (7.8/10 vs. 9.2/10 on G2).
Serpstat undercuts everyone on value at $50/month for its Individual plan (billed annually) and holds the highest G2 rating of the group at 4.6/5 from roughly 463 reviews, built for solo operators and small agencies. Ahrefs and Semrush both hold 4.5/5 on G2, with Ahrefs backed by 700+ reviews and Semrush by 3,400+. The honest choice depends on use case: Ahrefs for raw link data, Semrush for all-in-one marketing reporting, and Serpstat for budget-conscious solo or small-agency users.
Ahrefs Alternatives in 2026: How Semrush, Moz Pro, and Serpstat Actually Compare
Ahrefs is still one of the most widely used SEO platforms, but it isn't the only serious option, and it isn't the cheapest one either. If you're evaluating whether to stick with Ahrefs or move to a competitor, the honest answer depends on what you actually use it for — link data, keyword research, all-in-one marketing reporting, or just a budget-friendly way to track rankings.
This comparison sticks to verifiable facts pulled from vendor pricing pages and independent review platforms as of August 2026: Ahrefs, Semrush, Moz Pro, and Serpstat.
Product Overview
Direct answer: Ahrefs built its reputation on backlink data. Its crawler, AhrefsBot, maintains an index of roughly 35 trillion external backlinks and 493.9 billion indexed pages, refreshed every 15–30 minutes, alongside a keyword database of about 28.7 billion filtered keywords across 217 locations (Ahrefs Big Data). Ahrefs restructured its pricing in 2026, adding a lower-cost Starter tier while raising prices on its core Lite and Standard plans (Ahrefs Pricing).
Semrush has repositioned itself as a broader "visibility" platform rather than a pure SEO tool. Its current plan lineup pairs traditional SEO features with an AI Search toolkit (AI Overview and LLM-citation tracking), sold either bundled into higher tiers or as a $99/month add-on to classic plans (Semrush Pricing).
Moz Pro is the veteran of the group, generally positioned as the more approachable, education-heavy option, with Moz Academy and Moz Blog often cited by reviewers alongside the core toolset (Capterra: Moz Pro Pricing).
Serpstat is the budget play: a single platform covering keyword research, backlink analysis, rank tracking, site audits, and competitor analysis, aimed at solo operators and small agencies who don't need Ahrefs- or Semrush-scale data (Serpstat Pricing Breakdown, Spike AI).
Quick Answer
- If you're focused on backlink data specifically → stick with Ahrefs, because its index is roughly 35 trillion external backlinks refreshed every 15-30 minutes and it scores 9.2/10 on G2's Link Building category versus Moz Pro's 7.8/10.
- If you're wanting one platform covering SEO, PPC, content, and AI-visibility tracking → choose Semrush, because it bundles the broadest feature set of the four, including an AI Search toolkit for LLM-citation tracking.
- If you're a beginner who values ease of onboarding and education resources → choose Moz Pro, because it's the cheapest full entry point at $49/month and includes Moz Academy, frequently cited by reviewers as beginner-friendly.
- If you're a solo operator or small agency on a tight budget → choose Serpstat, because its Individual plan starts at $50/month and it holds the highest G2 rating in the comparison at 4.6/5.
Feature Comparison Matrix
| Ahrefs | Semrush | Moz Pro | Serpstat | |
|---|---|---|---|---|
| Entry-level plan (monthly) | $29 (Starter) | $139 (SEO) | $49 (Starter) | $50 (Individual, billed annually) |
| Realistic "pro" entry plan | $129 (Lite) | $139–$199 | $99 (Standard) | $100 (Team) |
| Backlink index | ~35 trillion external backlinks, refreshed every 15–30 min (Ahrefs Big Data) | Large proprietary index; exact current size not consistently published on vendor site | Smaller index than Ahrefs/Semrush per reviewer consensus | Smaller index; differentiates on 230 searchable Google databases rather than raw index size |
| Standout strength (per G2 category scores) | Link Building: 9.2/10 vs. Moz Pro's 7.8/10 (G2: Ahrefs vs. Moz Pro) | Broadest feature set across SEO, PPC, content, and AI visibility in one suite | Ease of use and onboarding, frequently cited by beginners in G2 reviews | Ease of setup (9.0/10) and support quality (9.4/10) per G2 comparison data |
| API access included from | Standard plan and up | Business/Advanced plans | Sold separately (beta API tier) | Included from Team plan |
| G2 rating (reviews) | 4.5/5 (~700+ reviews) (G2: Ahrefs) | 4.5/5 (~3,400+ reviews) (G2: Semrush) | 4.3/5 (~605 reviews) (G2: Moz Pro) | 4.6/5 (~463 reviews) (G2: Serpstat) |
Note: neither Semrush nor Moz publishes a directly comparable, regularly updated backlink-index size figure the way Ahrefs does, so that row is intentionally qualitative for those two rather than a fabricated number.
Pricing Comparison
- Ahrefs: Starter $29/mo, Lite $129/mo (5 projects, 750 tracked keywords), Standard $249/mo (20 projects, 2,000 tracked keywords), Advanced $449/mo, Enterprise $1,499/mo with an annual commitment required. Annual billing saves up to 17%. (Ahrefs Pricing)
- Semrush: SEO plan $139/mo (5 websites, 500 keywords tracked daily), Starter (SEO + AI Search) $199/mo, Pro+ $299/mo (15 websites, 1,500 keywords), Advanced $549/mo (40 websites, 5,000 keywords, API access). Annual billing brings the SEO plan down to roughly $117/mo. (Semrush Pricing)
- Moz Pro: Starter $49/mo, Standard $99/mo, Medium $179/mo, Large $299/mo, all flat monthly rates with a free trial available. (Capterra: Moz Pro Pricing)
- Serpstat: Individual $50/mo, Team $100/mo (includes API access), Team x2 $169/mo, Agency $410/mo — these are the annual-billed monthly rates; Enterprise is custom-quoted. (Serpstat Pricing Breakdown, Spike AI)
At the entry-professional tier, Ahrefs Lite ($129/mo) now costs roughly the same as Semrush's SEO plan ($139/mo), while Moz Pro's Standard tier ($99/mo) and Serpstat's Team plan ($100/mo) undercut both by a meaningful margin.
Who Should Choose What
Direct answer: Stick with or choose Ahrefs if link building and backlink auditing are your core workflow — its index size and G2 category lead in Link Building (9.2 vs. Moz Pro's 7.8) are hard to match (G2: Ahrefs vs. Moz Pro), and you don't mind paying the highest entry price of the group.
Choose Semrush if you want one platform covering SEO, PPC, content marketing, and the newer AI-visibility/LLM-citation tracking, and you're comparing total tool consolidation rather than pure backlink depth. It carries the most G2 reviews by far (~3,400+), suggesting the widest enterprise and agency adoption.
Choose Moz Pro if you're newer to SEO or want the gentlest learning curve — G2 reviewers consistently cite its ease of use and educational resources (Moz Academy, Moz Blog), and its entry pricing ($49–$99/mo) is the most approachable of the four for a solo marketer.
Choose Serpstat if budget is the deciding factor and you want API access without paying for a top-tier plan — it's the only one of the four bundling API access into its second tier ($100/mo Team) rather than reserving it for Business/Enterprise pricing, and it holds the highest G2 rating of the group (4.6/5).
