Two different layers of the stack
DataForSEO's job is breadth: give tool builders raw SERP and SEO data at scale, across dozens of endpoints, and let them build whatever they want on top. That's infrastructure. The value is coverage and volume, and the integration cost is that assembly, parsing, and interpretation are your code.
MentionsAPI's job is depth on one question: how visible is a brand across AI surfaces? We run the query against the surface, extract mentions, compute rank, and parse citations before the response leaves our side. The value is that the hard part ships pre-done; the tradeoff is that we only answer visibility questions. If you ask us for keyword volumes, we have nothing for you.
What DataForSEO covers
DataForSEO's catalog is wide: SERP APIs for the major search engines, keyword research data (volumes, difficulty, suggestions), backlink indexes, on-page audit crawling, business listings, and merchant/e-commerce APIs. If you're building a rank tracker, a keyword tool, a backlink analyzer, or a full SEO suite, that breadth is exactly what you need and there aren't many alternatives at its scale.
Pricing is pay-as-you-go per request, with costs varying by endpoint and priority level. For high-volume SERP pulls, that model works well: you pay for what you fetch and nothing else.
What MentionsAPI covers
AI surfaces only, but all of them. API modes query ChatGPT, Claude, Gemini, and Perplexity (a quick check across all four is 130 credits fresh, 5 cached). Live modes check what real UI surfaces render: Google AI Overviews (15 credits), Google AI Mode (35), Bing Copilot (15), and the live ChatGPT (35), Gemini (35), and Perplexity (85) UIs. `mode: all_live` sweeps every live surface for 165 credits.
Every response comes back in one schema: mentioned or not, rank within the answer, and cited URLs, per surface. There is no parsing step on your side. There is also a discover mode (165 credits) that generates the queries worth tracking for a brand, and a compare mode (500 credits) for head-to-head runs between two brands or queries.
Pricing models compared
DataForSEO bills pay-as-you-go per request. Rates depend on the endpoint, and at SERP-data volume the economics are the point: fetch millions of rows, pay per fetch.
MentionsAPI bills from a credit wallet: 300 free credits one-time on signup, then $5/mo for 1,000 credits or $54/yr for 12,000, with top-ups at $4 per 1,000 (monthly) or $3 per 1,000 (annual). Credits never expire. Each mode has a posted cost, so a monitoring workload prices out on a napkin: 100 AI Overview checks a day is 1,500 credits a day, no endpoint-rate matrix required.
Which should you pick
Pick DataForSEO when the product you're building needs raw SEO data: keyword volumes, backlink graphs, on-page audits, classic SERP positions at scale. It's infrastructure built for exactly that, and MentionsAPI doesn't offer any of it.
Pick MentionsAPI when the question is AI visibility and you want the answer in one call instead of building an extraction pipeline. If your deliverable is "is the brand mentioned, where does it rank, what got cited" across ChatGPT, AI Overviews, Bing Copilot, and the rest, that's the entire product.
Pick both when your tool spans both worlds. A common shape: classic keyword and rank data from DataForSEO powering the SEO half of a dashboard, MentionsAPI powering the AI-visibility half. Two independent vendors, two clean integrations, one product.