SpyFu

Semrush is a marketing and brand-visibility platform for SEO, AI search, PPC, social media, market research, and local SEO. It provides keyword research, competitor and market analysis, backlink analysis, rank tracking, technical site audits, traffic and market data, content creation tools, and marketing reports. The platform also tracks brand visibility in AI-generated answers and can connect Semrush data to AI assistants through Semrush MCP and its API.

Ahrefs is a digital marketing and SEO platform developed by Ahrefs Pte. Ltd. It provides tools for backlink analysis, keyword research, rank tracking, site auditing, and content research. Ahrefs maintains a large web and backlink index used for competitive analysis and search research.

Keyword Pro is a standalone, local-first keyword research console developed as an independent open-source project. It uses the user's own DataForSEO credentials rather than a hosted account, signup, or subscription system, and stores research sessions in a local database. Its guided report can make up to 19 keyword-research calls covering search volume, CPC, difficulty, intent, trends, SERP competitors, and related terms. The application supports 94 markets and 46 languages, validates country-language combinations, skips unsupported paid calls, and provides an advanced mode with 332 keyword-oriented DataForSEO endpoint definitions. It displays estimated costs before paid runs, saves completed reports for later reopening without another API call, and exports results as PDF, CSV, and JSON. The application runs locally with Node.js, pnpm, OpenSSL, and Podman or Docker, binding to 127.0.0.1 by default for a single local user. DataForSEO credentials stored by the application are encrypted with AES-256-GCM. The project is distributed under the Apache License 2.0.

Keyword Surfer is a browser extension by Surfer that displays keyword search volumes, related keywords, and estimated CPC directly in Google search results to support keyword research and on-the-fly SEO analysis. It is offered by Surfer (formerly Surfer SEO).

Surfer (formerly SurferSEO) is an SEO and content optimization platform that analyzes search data to guide on-page optimization, content planning, and organic growth. The platform includes keyword research, SERP analysis, a content editor, and AI-assisted content tools for drafting and optimization.