Guardian Open Platform vs Marketaux: full comparison for 2026
Quick verdict
Guardian Open Platform (3.8/5) edges ahead of Marketaux (3.7/5) overall. Guardian Open Platform is the better choice for Students, researchers and non-commercial apps. Marketaux is the stronger option for fintech side projects needing ticker-tagged news cheaply. The right pick depends on your budget, how much history you need and whether you need full text.
Guardian Open Platform vs Marketaux: head-to-head summary
| Criterion | Guardian Open Platform | Marketaux |
|---|---|---|
| Founded | 1821 | Not disclosed |
| HQ | London, UK | Not publicly disclosed |
| Team size | 1,000+ (Guardian Media Group) | Not publicly disclosed |
| Rating | 3.8 / 5 | 3.7 / 5 |
| Primary differentiator | Free full article text with editorial tags from a major publisher | Per-entity sentiment scores on every article, even on the free plan |
| Pricing model | Free developer key; commercial licence on request | Monthly request plans |
| Entry price | Free | $29/mo |
| Formats & SDKs | REST API, JSON | REST API, JSON |
| Typical uses | Research & academia, News & content apps, AI & LLM apps | Financial services, News & content apps |
Guardian Open Platform vs Marketaux: overview
Guardian Open Platform
The Guardian's Open Platform gives developers the same content API that runs the Guardian's own sites, with full article bodies, tags and sections going back to 1999. A free developer key is commonly reported at about 5,000 calls a day and 12 calls a second, and it is meant for non-commercial projects. Commercial use needs a separate agreement with Guardian News & Media. Clean, consistent tagging has made it a favourite for teaching and research, though you only ever get one publisher.
Marketaux
Marketaux covers stock, crypto and forex news and tags each article with the tickers and entities it mentions, each scored for sentiment between -1 and 1. Listings put coverage at about 5,000 sources in 30+ languages and 200,000+ tracked entities (per company website; independently unverifiable). The free plan allows 100 requests a day at three articles per request, and the official pricing page lists Basic at $29 a month for 2,500 daily requests. Entity statistics and trending endpoints need a paid tier, and the site does not say who operates it or where.
Features: Guardian Open Platform vs Marketaux
| Capability | Guardian Open Platform | Marketaux |
|---|---|---|
| Full article text | ✓ | ✗ |
| Historical archive | ✓ | ✗ |
| NLP enrichment | ✗ | ✓ |
| Story/event clustering | ✗ | ✗ |
| Licensed publisher content | ✗ | ✗ |
| Streaming or webhooks | ✗ | ✗ |
| Free access | ✓ | ✓ |
Formats and SDKs: Guardian Open Platform vs Marketaux
| Format / SDK | Guardian Open Platform | Marketaux |
|---|---|---|
| REST API | ✓ | ✓ |
| Python SDK | N/A | N/A |
| Node.js SDK | N/A | N/A |
| Webhooks | N/A | N/A |
| WebSocket | N/A | N/A |
| MCP server | N/A | N/A |
| S3/bulk delivery | N/A | N/A |
| BigQuery | N/A | N/A |
Pricing comparison: Guardian Open Platform vs Marketaux
| Criterion | Guardian Open Platform | Marketaux |
|---|---|---|
| Entry price | Free | $29/mo |
| Pricing model | Free developer key; commercial licence on request | Monthly request plans |
| Access models | Free tier, Enterprise contract | Free tier, Monthly plans |
| Price transparency | Public price | Public price |
| Price tier | Free | Budget |
Who each API suits: Guardian Open Platform vs Marketaux
| Dimension | Guardian Open Platform | Marketaux |
|---|---|---|
| Buyer type | Individuals to enterprise | Individuals to enterprise |
| Typical uses | Research & academia, News & content apps, AI & LLM apps | Financial services, News & content apps |
| Example use cases | Teaching data journalism or NLP with real articles. Research on UK and international coverage over time. | A stock news feed in a portfolio tracker. Sentiment features for a hobby trading model. |
| How you get access | Free tier | Free tier |
Guardian Open Platform vs Marketaux: pros and cons
| Guardian Open Platform | |
|---|---|
| + | Full article bodies at no cost, which is unusual for a major newspaper |
| + | Consistent tags and sections make filtering easy |
| + | An archive going back to 1999 |
| + | A stable, well-documented API that the Guardian uses itself |
| - | Single publisher, so coverage reflects one editorial line |
| - | Commercial use requires negotiating a licence |
| Marketaux | |
|---|---|
| + | Ticker and entity tagging saves building your own matcher |
| + | Sentiment is scored for each entity mentioned in an article |
| + | Commercial use from $29 a month |
| + | Crypto and forex as well as equities |
| - | The free plan returns only three articles per request |
| - | The operator is anonymous, which complicates vendor due diligence |
| - | Narrow focus on financial topics |
Who should choose Guardian Open Platform?
A typical fit: teaching data journalism or NLP with real articles.
Free full article text with editorial tags from a major publisher. Paid access starts at Free. Typical uses: Research & academia, News & content apps, AI & LLM apps.
Who should choose Marketaux?
A typical fit: a stock news feed in a portfolio tracker.
Per-entity sentiment scores on every article, even on the free plan. Paid access starts at $29/mo. Typical uses: Financial services, News & content apps.
Decision matrix: Guardian Open Platform vs Marketaux
| Your situation | Recommended choice |
|---|---|
| You want to start free before paying | Both |
| Your budget is at the lower end | Guardian Open Platform |
| You need full article text in the response | Guardian Open Platform |
| You need years of historical news | Guardian Open Platform |
| You need licensed premium or wire content | Neither; look at Factiva, AP or LexisNexis |
| You are wiring news into an LLM agent | Both work through plain REST calls |
Use case fit: Guardian Open Platform vs Marketaux
| Use case | Guardian Open Platform fit | Marketaux fit | Winner |
|---|---|---|---|
| Research & academia | Strong | Limited | Guardian Open Platform |
| News & content apps | Strong | Strong | Both equally |
| AI & LLM apps | Strong | Limited | Guardian Open Platform |
| Financial services | Limited | Strong | Marketaux |
Verdict: Guardian Open Platform vs Marketaux
Guardian Open Platform (3.8/5) is the stronger overall choice as a news data source. Free full article text with editorial tags from a major publisher.
Marketaux (3.7/5) is worth a look if you need sentiment features for a hobby trading model. If your situation matches that, Marketaux is a competitive option.
Related comparisons
Guardian Open Platform vs Marketaux FAQ
Is Guardian Open Platform better than Marketaux?
Guardian Open Platform (3.8/5) scores higher overall, but "better" depends on your use case. Guardian Open Platform's strongest advantage: full article bodies at no cost, which is unusual for a major newspaper. Marketaux's strongest advantage: ticker and entity tagging saves building your own matcher.
How do Guardian Open Platform and Marketaux differ in pricing?
Guardian Open Platform: free developer key; commercial licence on request, with paid access from Free. Marketaux: monthly request plans, with paid access from $29/mo. Both offer some free access for testing.
Which is better for enterprise: Guardian Open Platform or Marketaux?
Guardian Open Platform sells enterprise contracts with negotiated volume and SLA terms. Neither carries licensed publisher content, so check copyright terms before republishing anything.
What are the main differences between Guardian Open Platform and Marketaux?
What sets Guardian Open Platform apart: free full article text with editorial tags from a major publisher. What sets Marketaux apart: per-entity sentiment scores on every article, even on the free plan. They also differ on entry price (Free vs $29/mo) and typical uses (Research & academia, News & content apps vs Financial services, News & content apps).
Verify all details directly with each API before making a decision.