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Most buyers should pick YepAPI.
Choose YepAPI if your application needs several data types behind one API key, or you want published per-call prices and no monthly minimums. Choose Grepwords if keyword research and structured SERP data are the core requirements, especially when you need custom reports, databases or endpoints. YepAPI lists a $5 signup credit; Grepwords’ pricing is custom, so ask for a quote and request-volume details before comparing costs at scale.
01Side by side
| YepAPI | Grepwords | |
|---|---|---|
| Pricing model | Pay per call; no subscriptions or monthly minimums | Custom monthly pricing; enterprise contracts are annual |
| Free tier | $5 signup credit; no card required | No free trial listed |
| API and SDKs | Shared key, JSON responses; SDKs not named | Keyword, related-data and SERP APIs; SDKs not named |
| CLI and docs | API docs, MCP server and agent skills | Lookup, Related Data and SERP API docs |
| Integrations | Claude Code, Cursor, Codex and MCP | No integrations named |
| Platforms | Web | Web |
| Limits and scaling | No rate limits; failed calls aren't charged | Custom request volumes; 100/500 default returns |
| Product scope | SEO, scraping, social, commerce and 285 AI models | Keyword database, related keywords and SERP intelligence |
YepAPI Choose YepAPI if
- Choose YepAPI if one application needs several API categories.
- Choose YepAPI if you want published per-call prices and no subscription.
- Choose YepAPI if your workflow uses Claude Code, Cursor, Codex or MCP.
Grepwords Choose Grepwords if
- Choose Grepwords if keyword and SERP data are your main requirements.
- Choose Grepwords if you need custom reports, databases or endpoints.
- Choose Grepwords if you want data across 90+ locations and languages.
02Pricing at real usage
YepAPI gives new accounts $5 in signup credit, with no card required. It has no subscription or monthly minimum: usage is prepaid and billed per call or other metered unit. The pricing page lists Google SERP calls at $0.01 for 10 results, keyword overview from $0.03 per call, and web scraping at $0.01 per call. Failed calls are not charged. The cost grows with calls and the selected endpoint or model; the homepage lists image and video model prices separately.
Grepwords’ pricing page lists a One Simple Plan and custom solutions, but does not publish exact monthly or annual prices. SERP responses default to 100 results and related-keyword responses to 500; request volumes are customized. Enterprise solutions require annual contracts. Ask for a quote based on your expected request volume and response sizes before estimating ongoing cost.
03API, SDKs and integration
YepAPI exposes POST endpoints for SEO, Google SERP and web scraping, among other categories. Its examples send JSON and return JSON, and the homepage says the same API key works across endpoints and AI models. The docs are linked from the homepage; the vendor also points to an MCP server, agent skills and integrations with Claude Code, Cursor and Codex. Named SDKs and supported programming languages are not published, so plan around the documented API requests rather than assuming a language-specific client.
Grepwords offers separate documentation for its Lookup API, Related Data API and SERP Data API. Its homepage describes structured SERP outputs and a keyword dashboard, alongside custom reports, databases and endpoints. The docs provide a starting point for API integration, but the homepage does not name SDKs, languages or third-party integrations. Treat the APIs as a focused keyword-data layer and confirm authentication, response schemas and request-volume options in the docs before building an adapter.
04Open source, self-hosting and lock-in
The vendors do not publish open-source licences or self-hosting options on their homepages. Both products are presented as web services with APIs, so confirm deployment and data-handling requirements with the vendors if your architecture requires running the service inside your own environment.
YepAPI’s shared key and consistent JSON response format can reduce the number of integrations in an application, but it also places several data categories behind one vendor’s endpoints. Grepwords separates its Lookup, Related Data and SERP APIs, with custom endpoints available for client needs. Before committing to either service, ask how to export stored data, whether results can be retrieved in bulk, and what happens to access and historical data if you leave. Keep an application-level adapter around vendor-specific schemas to limit migration work.
Questions people ask
Is YepAPI cheaper than Grepwords?
YepAPI publishes per-call prices, including Google SERP at $0.01 for 10 results, and has no monthly minimums. Grepwords’ pricing is custom and exact amounts are not published. Which costs less depends on your request volume, data requirements and Grepwords quote; compare using the same volume and response size.
Does YepAPI have a free plan?
YepAPI offers $5 in signup credit and says no card is required. Its pricing is pay-per-use, with no subscription; the credit is not described as an ongoing free plan. Grepwords does not list a free trial on its pricing details.
Which service is better for keyword research?
Grepwords is focused on keyword data, related keywords and structured SERP results, with a database of more than 5 billion keywords and data for 90+ locations and languages. YepAPI also offers keyword and SERP endpoints, but extends into scraping, social, commerce and AI models.
Can I self-host YepAPI or Grepwords?
Neither vendor’s homepage publishes a self-hosting option or open-source licence. Both are presented through web access and APIs. If your system must run entirely in your own infrastructure, ask each vendor about deployment, data export and the conditions for ending service before choosing.