Massive (ex-Polygon.io) News vs Diffbot: full comparison for 2026
Quick verdict
Massive (ex-Polygon.io) News (3.8/5) edges ahead of Diffbot (3.7/5) overall. Massive (ex-Polygon.io) News is the better choice for trading-app developers already using Polygon or Massive data. Diffbot is the stronger option for developers collecting news from a fixed list of sites. The right pick depends on your budget, how much history you need and whether you need full text.
Massive (ex-Polygon.io) News vs Diffbot: head-to-head summary
| Criterion | Massive (ex-Polygon.io) News | Diffbot |
|---|---|---|
| Founded | 2016 | 2008 |
| HQ | Atlanta, Georgia, USA | Menlo Park, California, USA |
| Team size | Not publicly disclosed | 11–50 |
| Rating | 3.8 / 5 | 3.7 / 5 |
| Primary differentiator | Per-ticker sentiment with a written reason, included in stock data plans | Parser-free extraction from any article URL, linked to a Knowledge Graph |
| Pricing model | Monthly plans per asset class | Monthly credit plans |
| Entry price | $29/mo | $299/mo |
| Formats & SDKs | REST API, JSON, WebSocket | REST API, JSON, Python SDK |
| Typical uses | Financial services, Research & academia | AI & LLM apps, Research & academia, Marketing & PR, Financial services |
Massive (ex-Polygon.io) News vs Diffbot: overview
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.
Diffbot
Diffbot, founded by Mike Tung in 2008 and based in Menlo Park, California, has an estimated 30–40 staff. Point its Article API at any news URL and it returns title, author, date and clean text without a site-specific parser, and Crawlbot can follow a list of publishers you choose. Its Knowledge Graph links articles to companies, people and topics, so it can also be queried as a news source. The free plan includes 10,000 credits at five calls a minute, Startup costs $299 a month for 250,000 credits, and each exported Knowledge Graph entity costs 25 credits. It works best when you want to build your own news collection from chosen sites.
Features: Massive (ex-Polygon.io) News vs Diffbot
| Capability | Massive (ex-Polygon.io) News | Diffbot |
|---|---|---|
| Full article text | ✗ | ✓ |
| Historical archive | ✓ | ✓ |
| NLP enrichment | ✓ | ✓ |
| Story/event clustering | ✗ | ✗ |
| Official SDK | ✓ | ✓ |
| Streaming or webhooks | ✗ | ✗ |
| Free access | ✓ | ✓ |
Formats and SDKs: Massive (ex-Polygon.io) News vs Diffbot
| Format / SDK | Massive (ex-Polygon.io) News | Diffbot |
|---|---|---|
| REST API | ✓ | ✓ |
| Python SDK | ✓ | ✓ |
| Node.js SDK | ✓ | N/A |
| Webhooks | N/A | N/A |
| WebSocket | ✓ | N/A |
| MCP server | N/A | N/A |
| S3/bulk delivery | ✓ | N/A |
| BigQuery | N/A | N/A |
Pricing comparison: Massive (ex-Polygon.io) News vs Diffbot
| Criterion | Massive (ex-Polygon.io) News | Diffbot |
|---|---|---|
| Entry price | $29/mo | $299/mo |
| Pricing model | Monthly plans per asset class | Monthly credit plans |
| Access models | Free tier, Monthly plans, Enterprise contract | Free tier, Monthly plans, Enterprise contract |
| Price transparency | Public price | Public price |
| Price tier | Budget | Mid-market |
Who each API suits: Massive (ex-Polygon.io) News vs Diffbot
| Dimension | Massive (ex-Polygon.io) News | Diffbot |
|---|---|---|
| Buyer type | Individuals to enterprise | Individuals to enterprise |
| Typical uses | Financial services, Research & academia | AI & LLM apps, Research & academia, Marketing & PR |
| Example use cases | News beside charts in a trading app. Explaining price moves with sentiment reasons. | Monitoring niche trade publications. Clean article text for an LLM from known URLs. |
| How you get access | Free tier | Free tier |
Massive (ex-Polygon.io) News vs Diffbot: pros and cons
| 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 |
| Diffbot | |
|---|---|
| + | No custom scrapers to maintain when a site changes layout |
| + | 10,000 free credits with no card |
| + | Knowledge Graph links coverage to companies and people |
| + | Crawlbot handles crawling the publishers you pick |
| - | Five calls a minute on the free plan |
| - | Knowledge Graph exports cost 25 credits each |
| - | You assemble the feed yourself |
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.
Who should choose Diffbot?
A typical fit: monitoring niche trade publications.
Parser-free extraction from any article URL, linked to a Knowledge Graph. Paid access starts at $299/mo. Typical uses: AI & LLM apps, Research & academia, Marketing & PR, Financial services.
Decision matrix: Massive (ex-Polygon.io) News vs Diffbot
| 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 | Diffbot |
| 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: Massive (ex-Polygon.io) News vs Diffbot
| Use case | Massive (ex-Polygon.io) News fit | Diffbot fit | Winner |
|---|---|---|---|
| Financial services | Strong | Strong | Both equally |
| Research & academia | Strong | Strong | Both equally |
| AI & LLM apps | Limited | Strong | Diffbot |
| Marketing & PR | Limited | Strong | Diffbot |
Verdict: Massive (ex-Polygon.io) News vs Diffbot
Massive (ex-Polygon.io) News (3.8/5) is the stronger overall choice as a news data source. Per-ticker sentiment with a written reason, included in stock data plans.
Diffbot (3.7/5) is worth a look if you need clean article text for an LLM from known URLs. If your situation matches that, Diffbot is a competitive option.
Related comparisons
Massive (ex-Polygon.io) News vs Diffbot FAQ
Is Massive (ex-Polygon.io) News better than Diffbot?
Massive (ex-Polygon.io) News (3.8/5) scores higher overall, but "better" depends on your use case. Massive (ex-Polygon.io) News's strongest advantage: news comes with every Stocks plan, including the free one. Diffbot's strongest advantage: no custom scrapers to maintain when a site changes layout.
How do Massive (ex-Polygon.io) News and Diffbot differ in pricing?
Massive (ex-Polygon.io) News: monthly plans per asset class, with paid access from $29/mo. Diffbot: monthly credit plans, with paid access from $299/mo. Both offer some free access for testing.
Which is better for enterprise: Massive (ex-Polygon.io) News or Diffbot?
Both sell enterprise contracts. Neither carries licensed publisher content, so check copyright terms before republishing anything.
What are the main differences between Massive (ex-Polygon.io) News and Diffbot?
What sets Massive (ex-Polygon.io) News apart: per-ticker sentiment with a written reason, included in stock data plans. What sets Diffbot apart: parser-free extraction from any article URL, linked to a Knowledge Graph. They also differ on entry price ($29/mo vs $299/mo) and typical uses (Financial services, Research & academia vs AI & LLM apps, Research & academia).
Verify all details directly with each API before making a decision.