Best AI tools to improve SEO
Short answer
Semrush ranks #1 for improve SEO (score 8.4/10). Pricing: $117.33/mo annual ($139 monthly); free tier: no. Runners-up: Ahrefs, Surfer.
Top 5, ranked by our published rubric. Sponsorship never affects the order. Last updated 2026-10-13.
1Semrush
SEO and marketing suiteScore 8.4/10 (fit 10.0 · value 3.8 · breadth 10 · availability 10) · how we score
Pricing: Free tier: no · Paid from: $117.33/mo annual ($139 monthly) · source, Pricing last checked: 2026-10-13 · Site checked: 2026-10-13 (live)
Why ranked: Its own site says: “Semrush is the leading platform to grow and measure brand visibility across AI search, SEO, PPC, social, and more.” We placed it 1st of 5 on fit for this task. No free plan confirmed; paid from $117.33/mo annual ($139 monthly).
2Ahrefs
SEO toolsetScore 7.8/10 (fit 8.5 · value 4.4 · breadth 10 · availability 10) · how we score
Pricing: Free tier: Unverified · Paid from: $129/mo · source, Pricing last checked: 2026-10-13 · Site checked: 2026-10-13 (live)
Why ranked: Its own site says: “We help marketers drive visibility across AI search, SEO, content, and social – with the largest AI and search databases online.” We placed it 2nd of 5 on fit for this task. No free plan confirmed; paid from $129/mo.
3Surfer
SEO content optimizationScore 7.0/10 (fit 7.0 · value 3.8 · breadth 10 · availability 10) · how we score
Pricing: Free tier: no · Paid from: Standard $99/mo · source, Pricing last checked: 2026-10-13 · Site checked: 2026-10-13 (live)
Why ranked: Its own site says: “Track and improve your brand's visibility across Google and AI search engines like ChatGPT, Gemini, and Perplexity.” We placed it 3rd of 5 on fit for this task. No free plan confirmed; paid from Standard $99/mo.
SPONSORED Your tool here: paid placement is shown here, separate from the ranking, and never changes the order. Advertise
4Perplexity
AI answer engine with citationsScore 6.7/10 (fit 4.0 · value 10.0 · breadth 10 · availability 7) · how we score
Pricing: Free tier: yes · Paid from: $17/mo (Pro, billed annually) · source, Pricing last checked: 2026-10-13 · Site checked: 2026-10-13 (bot-blocked (403))
Why ranked: Perplexity: AI answer engine with citations. We placed it 5th of 5 on fit for this task. Free tier; paid from $17/mo (Pro, billed annually).
5Clearscope
SEO content optimizationScore 6.2/10 (fit 5.5 · value 3.8 · breadth 10 · availability 10) · how we score
Pricing: Free tier: no · Paid from: $129/mo · source, Pricing last checked: 2026-10-13 · Site checked: 2026-10-13 (live)
Why ranked: Its own site says: “Clearscope is the discoverability platform for a new era in search.” We placed it 4th of 5 on fit for this task. No free plan confirmed; paid from $129/mo.
FAQ
What is the best AI tool to improve SEO?
By TaskRanking's published rubric, Semrush ranks first, followed by Ahrefs and Surfer.
Is there a free AI tool to improve SEO?
Yes: Perplexity has a free tier per its own pricing page (checked 2026-10-13).
How are these tools ranked?
Score = 50% fit, 25% value (from vendor pricing pages), 15% breadth, 10% availability. Sponsorship never affects rank.