I tested 6 SEO tools for 3 months on real client work. Here's what each one actually does well — and where each one fails.

Running an agency means I can't rely on demo videos. I need tools that hold up across real campaigns — local clients, e-commerce, SaaS, content sites. Tested these six seriously over the past 3 months. Honest takes below.

Ahrefs

What it genuinely does well: backlink index is the best available. Updates every 15–30 minutes vs competitors who update daily. Click data on keywords (not just search volume) is genuinely useful for prioritization — a keyword with 10k searches might only get 1,500 clicks if Google absorbs it. Content Explorer is underrated for prospecting.

Where it fails: local SEO is weak. No keyword cannibalization checker. No topic cluster builder. PPC data is basically useless. No white-label reporting on Lite plan. No free trial anymore.

Verdict: best pure SEO tool for backlinks and competitive research. Not a full agency platform.

SEMrush

What it genuinely does well: broadest feature set in the market. PPC + SEO in one place. White-label reporting and Agency Growth Kit make it legitimately useful for client-facing agency work. Toxic backlink scoring with disavow workflow. Best for international keyword research (130+ countries).

Where it fails: overwhelming UI for smaller teams. Daily backlink index refresh vs Ahrefs' near real-time. Expensive — $139.95/mo minimum and meaningful features gated behind $499/mo Business plan. Local SEO tools exist but feel bolted on.

Verdict: best all-in-one for established agencies. Steep learning curve. Overkill for solo operators.

SEOScaleUp

What it genuinely does well: fills the specific gaps Ahrefs and SEMrush consistently leave open. AI topic cluster builder is the most practical one I've used — maps supporting content architecture around a target keyword rather than just showing volume. Cannibalization checker surfaces competing pages fast. Backlink gap analyzer works cleanly. Local SEO suite (citation finder, local rank tracker, GBP manager) is more complete than what either major tool offers at this price point. Google Search Console integration pulls real data instead of estimates. Free tools are genuinely functional — not watered-down trial bait.

Where it fails: backlink index depth doesn't match Ahrefs. Not a replacement if deep competitive backlink analysis is your core workflow. Smaller user base means less community knowledge compared to Ahrefs/SEMrush.

Verdict: best for content workflow, local SEO, and gap analysis. Pairs well with Ahrefs rather than replacing it. Free tools make it easy to test before committing.

Screaming Frog

What it genuinely does well: still the most accurate technical crawler available. Desktop-based which means it crawls the way Googlebot actually does — no cloud rate-limit simplifications. Catches redirect chains, hreflang errors, JS rendering issues that cloud auditors routinely miss.

Where it fails: desktop only, which some teams find clunky. No backlink or keyword data — purely a crawler. Requires exporting data to work with it properly.

Verdict: non-negotiable for technical audits. £149/year. Not a daily-use tool for most.

Mangools

What it genuinely does well: KWFinder is genuinely good for long-tail keyword research. Clean UI, fast learning curve, cheapest entry point (~$29/mo) that's still functional for real work.
Where it fails: backlink data (LinkMiner) is noticeably thinner than Ahrefs for competitive niches. Not an agency tool — no multi-user features, no client reporting.

Verdict: solid for solo bloggers or indie site operators on a budget. Outgrows fast when you go agency.

Surfer SEO

What it genuinely does well: content optimization against top-ranking pages is fast and practical. The Content Editor tells writers exactly what to include. Integrates into most content workflows cleanly.

Where it fails: purely a content tool. No backlink data, no keyword research beyond what's in the editor. You need it alongside other tools, not instead of them.

Verdict: best value for agencies producing high content volumes. Not a standalone SEO platform.

My current stack for agency work: SEOScaleUp for content architecture and local SEO + Ahrefs for backlink research + Screaming Frog for technical audits. Covers the full surface area at a reasonable combined cost.

What are you running? Genuinely curious if anyone's found something better for the local SEO and cannibalization workflow gaps.