G2 vs Capterra vs Trustpilot: Which Review Site Wins — and Do They Matter for AI Search?

By Cory Maki · Oct 10, 2026

If you sell software, you have weighed G2 vs Capterra vs Trustpilot at some point — where to send reviewers, which badge to chase, which one buyers actually trust. Here is the straight comparison. But there is a second question that matters more in 2026 and almost nobody is asking it: do AI engines even cite these review sites when they recommend software? The answer changes where you should spend.

G2 vs Capterra vs Trustpilot at a glance

The short version: for B2B SaaS, G2 carries the most weight with buyers and reviewers tend to be real users with context. Capterra (same parent as G2, Gartner) is strong for SMB software discovery. Trustpilot is broader and more consumer-facing — great for overall brand trust, less decisive for a technical software decision. If you only pick one for B2B, G2 usually converts best; Trustpilot is the one to add when consumer-level trust matters.

The question that actually matters: do AI engines cite them?

Here is the uncomfortable finding. When AI assistants recommend software, they lean heavily on Reddit — not the review aggregators. In a trace of every source behind a live ChatGPT software recommendation, Reddit dominated the citations while G2, Capterra and TrustRadius were barely present. The reason is structural: AI wants what reads as unbought opinion, and review platforms are, by design, optimized. Reddit threads read as real users talking.

This does not make review sites worthless — they still influence human buyers, power your star ratings, and feed traditional SEO. But if your goal is being recommended inside AI answers, pouring budget into review-site optimization and expecting AI citations is a misread of where the citations come from.

Where to actually spend

• For human conversion and brand trust: keep G2 (B2B) and add Trustpilot (consumer trust). Earn genuine reviews; the badges still matter to people.
• For AI citations: invest where AI actually looks — Reddit and community authority, earned editorial coverage, and your own citable content. This is the lever review sites do not move.
• Know your category. It is not universal: AI cites different sources by category. For local services, review aggregators and license records win, not Reddit. For software, it flips. Check yours before you commit budget.

The mistake is assuming the platform that wins human trust also wins the AI citation. In B2B software, those are two different races.

See which sources are winning yours

A free AI visibility report shows, for your category, exactly which sources AI cites when it recommends tools like yours — review sites, Reddit, or something else — so you spend where it counts.