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Keywords Everywhere is a browser extension for SEO research, with paid credits and a free plan. That fits quick keyword checks, but developers building products or repeatable data workflows may want an API, clearer quotas or a different pricing model. DataForSEO is the closest fit for custom SEO software; SE Ranking and YepAPI offer other API paths. Compare each provider’s quotas and pricing against your expected call volume before migrating.
01Why people leave Keywords Everywhere
Credits can be hard to predict
One Reddit thread reports that a page or search can consume 500 credits, and asks for a usage cap and cached results.
Browser research does not fit every stack
If keyword data needs to feed an application or pipeline, an API can replace manual extension lookups with an integration you control.
Privacy concerns affect adoption
Reddit users raised concerns about search tracking; another commenter disputed them, saying the tool uses Google data and its terms say it does not sell user data.
02The alternatives, ranked by fit
- Best for custom SEO software
DataForSEODataForSEODataForSEO is the strongest match for teams replacing extension lookups with a product integration: it offers a range of SEO data APIs and usage-based workflows. The entry cost is listed as low, but no starting price is given here. You own the integration, so plan for field mapping, error handling and monitoring rather than expecting a browser-style workflow.
Trade-off: You own the integration and should confirm pricing for your call volume.
7.8/10from
Custom - Best for agency workflows
SE RankingSE RankingSE Ranking offers API and MCP access through quota-based plans, making it a fit for teams connecting SEO data to client reports or AI tools. It starts at $103.20, so compare the included quota with your expected use. Migrating means mapping the keyword metrics your workflow needs to its API or MCP access, rather than relying on the extension.
Trade-off: Quota-based plans start at $103.20; check the included limits.
7.3/10from
$103.20/mo - Best for mixed data and AI
YepAPIYepAPIYepAPI combines SEO, scraping, social and e-commerce data in one usage-billed API, alongside 285 AI models. That can suit an application already making HTTP API calls and needing more than keyword metrics. Pricing starts at n/a, so estimate costs against expected requests before replacing a credit-based browser workflow.
Trade-off: Starting price is not listed; validate request costs before committing.
7.2/10from
Custom - Best for a small free tier
Moz APIMoz APIMoz API can supply SEO data to custom dashboards and keyword research integrations. Its free plan includes a 50-row tier, and paid pricing starts at $20. That gives developers a concrete starting point for a small integration; check whether the row limit and published integration details fit your data volume before moving production workloads.
Trade-off: The 50-row free tier may not suit larger workloads.
6.2/10from
$20/mofree plan - Best for existing Ahrefs users
Ahrefs APIAhrefs APIAhrefs API is a practical option if your team already uses Ahrefs data and wants to connect it to dashboards, reporting or AI tools. A free plan is listed, but pricing and plan limits need confirmation. Migration requires replacing extension-based lookups with API calls and checking the available data and quotas against your existing workflow.
Trade-off: Confirm API pricing and plan limits before building around it.
7.1/10from
Freefree plan - Best for SEO research and audits
SerpstatSerpstatSerpstat combines SEO research and audits with Google keyword data, multi-site tracking and API access. It starts at $50, which gives teams a published entry price to compare with Keywords Everywhere credits. Before migrating, verify integration limits and map the metrics your workflows depend on; its broad toolkit may be more than a keyword-only replacement needs.
Trade-off: Verify API limits before depending on it in production.
6.8/10from
$50/mo
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Keywords Everywhere Keywords Everywhere (current) | 6.8 | $7/mo | Yes | SEO research inside the browser |
| DataForSEO DataForSEO | 7.8 | Custom | No | Teams building SEO software |
| SE Ranking SE Ranking | 7.3 | $103.20/mo | No | SEO teams building client reports |
| YepAPI YepAPI | 7.2 | Custom | No | Apps combining SEO and AI features |
| Moz API Moz API | 6.2 | $20/mo | Yes | Custom SEO dashboards |
| Ahrefs API Ahrefs API | 7.1 | Free | Yes | Teams already using Ahrefs data |
| Serpstat Serpstat | 6.8 | $50/mo | No | SEO teams combining research and audits |
Questions people ask
Can I use Keywords Everywhere for free?
Keywords Everywhere lists a free plan, but paid use is credit-based and starts at $7. For alternatives, Moz lists a free plan with a 50-row tier, while Ahrefs also lists a free plan. Check each plan’s current quotas against your expected usage before choosing.
Is Keywords Everywhere safe to use?
Reddit users have raised privacy concerns about the extension’s handling of searches. Another commenter says Keywords Everywhere uses Google data and that its terms state it does not sell user data. Review the vendor’s current privacy terms and assess whether the extension fits your organization’s requirements.
What are the best keyword research tools for developers?
For custom software and usage-based SEO data workflows, consider DataForSEO. SE Ranking offers API and MCP access, while Moz and Ahrefs provide APIs for SEO integrations. The right choice depends on required data, quotas and costs at your expected call volume; verify those details before building.