NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News: full comparison for 2026
Quick verdict
NewsAPI.ai (Event Registry) (4.3/5) edges ahead of Massive (ex-Polygon.io) News (3.8/5) overall. NewsAPI.ai (Event Registry) is the better choice for developers building multilingual event or research tools. Massive (ex-Polygon.io) News is the stronger option for trading-app developers already using Polygon or Massive data. The right pick depends on your budget, how much history you need and whether you need full text.
NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News: head-to-head summary
| Criterion | NewsAPI.ai (Event Registry) | Massive (ex-Polygon.io) News |
|---|---|---|
| Founded | 2017 | 2016 |
| HQ | Ljubljana, Slovenia | Atlanta, Georgia, USA |
| Team size | 11–50 | Not publicly disclosed |
| Rating | 4.3 / 5 | 3.8 / 5 |
| Primary differentiator | Event records that join coverage of one story across languages | Per-ticker sentiment with a written reason, included in stock data plans |
| Pricing model | Monthly token plans; per-token overage | Monthly plans per asset class |
| Entry price | $90/mo | $29/mo |
| Formats & SDKs | REST API, JSON, Python SDK | REST API, JSON, WebSocket |
| Typical uses | Research & academia, Media monitoring, Financial services, Risk & compliance | Financial services, Research & academia |
NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News: overview
NewsAPI.ai (Event Registry)
NewsAPI.ai is sold by Event Registry d.o.o., a Ljubljana company that left the Jožef Stefan Institute's AI lab as a spin-off in 2017. Its query model is built around events: articles about the same real-world story in different languages are linked into one event record, and each article carries concepts mapped to Wikipedia entities, categories and sentiment. Developers get an open-source Python client on GitHub and a published token price list, with recent-news searches at one token and archive searches costing more; the 5K-token plan is about $90 a month. Expect to write paging code. A search returns at most 100 articles, so bigger pulls take many calls, each billed in tokens, and some developers report pagination and rate-limit friction on larger jobs (user reports; independently unverifiable).
Massive (ex-Polygon.io) News
Massive is the name Polygon.io took on October 30, 2025. The company was founded in Atlanta around 2016 by Quinton Pike, and old api.polygon.io endpoints keep working beside the new api.massive.com base. Its ticker news endpoint returns recent articles for a symbol with summaries, publisher details and an insights array giving a sentiment label and a one-sentence reason for each ticker mentioned. Sentiment only exists for articles published after July 2, 2024. Ticker news is included in every Stocks plan: the free Basic tier reaches two years of history, and Stocks Starter costs $29 a month. Official SDKs cover Python, Go, JavaScript and more, and flat files can be pulled from S3.
Features: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Capability | NewsAPI.ai (Event Registry) | Massive (ex-Polygon.io) News |
|---|---|---|
| Full article text | ✓ | ✗ |
| Historical archive | ✓ | ✓ |
| NLP enrichment | ✓ | ✓ |
| Story/event clustering | ✓ | ✗ |
| Official SDK | ✓ | ✓ |
| Streaming or webhooks | ✓ | ✗ |
| Free access | ✓ | ✓ |
Formats and SDKs: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Format / SDK | NewsAPI.ai (Event Registry) | Massive (ex-Polygon.io) News |
|---|---|---|
| REST API | ✓ | ✓ |
| Python SDK | ✓ | ✓ |
| Node.js SDK | ✓ | ✓ |
| Webhooks | ✓ | N/A |
| WebSocket | N/A | ✓ |
| MCP server | N/A | N/A |
| S3/bulk delivery | N/A | ✓ |
| BigQuery | N/A | N/A |
Pricing comparison: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Criterion | NewsAPI.ai (Event Registry) | Massive (ex-Polygon.io) News |
|---|---|---|
| Entry price | $90/mo | $29/mo |
| Pricing model | Monthly token plans; per-token overage | Monthly plans per asset class |
| Access models | Free tier, Monthly plans, Enterprise contract | Free tier, Monthly plans, Enterprise contract |
| Price transparency | Public price | Public price |
| Price tier | Budget | Budget |
Who each API suits: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Dimension | NewsAPI.ai (Event Registry) | Massive (ex-Polygon.io) News |
|---|---|---|
| Buyer type | Individuals to enterprise | Individuals to enterprise |
| Typical uses | Research & academia, Media monitoring, Financial services | Financial services, Research & academia |
| Example use cases | Following one story as it spreads across countries and languages. Research tools that analyse media coverage over time. | News beside charts in a trading app. Explaining price moves with sentiment reasons. |
| How you get access | Free tier | Free tier |
NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News: pros and cons
| NewsAPI.ai (Event Registry) | |
|---|---|
| + | Cross-language event linking that would take months to build yourself |
| + | Concepts resolve to Wikipedia entities, which makes filters exact |
| + | Token prices are public, so you can estimate a bill before signing up |
| + | The open-source Python client ships with many worked query examples |
| - | A 100-article cap per search means writing and paying for many paginated calls |
| - | Developers report pagination and rate-limit friction on large jobs (user reports; independently unverifiable) |
| - | Archive searches cost more tokens, and unused tokens expire monthly |
| - | The query language has a learning curve |
| Massive (ex-Polygon.io) News | |
|---|---|
| + | News comes with every Stocks plan, including the free one |
| + | Sentiment includes a short explanation you can show users |
| + | Mature SDKs and WebSocket streams for prices |
| + | Old Polygon code keeps working after the rebrand |
| - | Sentiment is missing for anything before July 2024 |
| - | Covers listed companies only |
| - | Each asset class is billed separately |
Who should choose NewsAPI.ai (Event Registry)?
A typical fit: following one story as it spreads across countries and languages.
Event records that join coverage of one story across languages. Paid access starts at $90/mo. Typical uses: Research & academia, Media monitoring, Financial services, Risk & compliance.
Who should choose Massive (ex-Polygon.io) News?
A typical fit: news beside charts in a trading app.
Per-ticker sentiment with a written reason, included in stock data plans. Paid access starts at $29/mo. Typical uses: Financial services, Research & academia.
Decision matrix: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Your situation | Recommended choice |
|---|---|
| You want to start free before paying | Both |
| Your budget is at the lower end | Massive (ex-Polygon.io) News |
| You need full article text in the response | NewsAPI.ai (Event Registry) |
| You need years of historical news | Both |
| You want an official SDK | Both |
| You are wiring news into an LLM agent | Both work through plain REST calls |
Use case fit: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
| Use case | NewsAPI.ai (Event Registry) fit | Massive (ex-Polygon.io) News fit | Winner |
|---|---|---|---|
| Research & academia | Strong | Strong | Both equally |
| Media monitoring | Strong | Limited | NewsAPI.ai (Event Registry) |
| Financial services | Strong | Strong | Both equally |
| Risk & compliance | Strong | Limited | NewsAPI.ai (Event Registry) |
Verdict: NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News
NewsAPI.ai (Event Registry) (4.3/5) is the stronger overall choice as a news data source. Event records that join coverage of one story across languages.
Massive (ex-Polygon.io) News (3.8/5) is worth a look if you need explaining price moves with sentiment reasons. If your situation matches that, Massive (ex-Polygon.io) News is a competitive option.
Related comparisons
NewsAPI.ai (Event Registry) vs Massive (ex-Polygon.io) News FAQ
Is NewsAPI.ai (Event Registry) better than Massive (ex-Polygon.io) News?
NewsAPI.ai (Event Registry) (4.3/5) scores higher overall, but "better" depends on your use case. NewsAPI.ai (Event Registry)'s strongest advantage: cross-language event linking that would take months to build yourself. Massive (ex-Polygon.io) News's strongest advantage: news comes with every Stocks plan, including the free one.
How do NewsAPI.ai (Event Registry) and Massive (ex-Polygon.io) News differ in pricing?
NewsAPI.ai (Event Registry): monthly token plans; per-token overage, with paid access from $90/mo. Massive (ex-Polygon.io) News: monthly plans per asset class, with paid access from $29/mo. Both offer some free access for testing.
Which is better for enterprise: NewsAPI.ai (Event Registry) or Massive (ex-Polygon.io) News?
Both sell enterprise contracts. Neither carries licensed publisher content, so check copyright terms before republishing anything.
What are the main differences between NewsAPI.ai (Event Registry) and Massive (ex-Polygon.io) News?
What sets NewsAPI.ai (Event Registry) apart: event records that join coverage of one story across languages. What sets Massive (ex-Polygon.io) News apart: per-ticker sentiment with a written reason, included in stock data plans. They also differ on entry price ($90/mo vs $29/mo) and typical uses (Research & academia, Media monitoring vs Financial services, Research & academia).
Verify all details directly with each API before making a decision.