Alpha Vantage News & Sentiment vs Diffbot: full comparison for 2026
Quick verdict
Alpha Vantage News & Sentiment (3.8/5) edges ahead of Diffbot (3.7/5) overall. Alpha Vantage News & Sentiment is the better choice for hobby quants wanting news sentiment beside price 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.
Alpha Vantage News & Sentiment vs Diffbot: head-to-head summary
| Criterion | Alpha Vantage News & Sentiment | Diffbot |
|---|---|---|
| Founded | 2017 | 2008 |
| HQ | Boston, Massachusetts, USA | Menlo Park, California, USA |
| Team size | Not publicly disclosed | 11–50 |
| Rating | 3.8 / 5 | 3.7 / 5 |
| Primary differentiator | Ticker and topic sentiment scores from the same key as market data | Parser-free extraction from any article URL, linked to a Knowledge Graph |
| Pricing model | Free key; premium plans by rate limit | Monthly credit plans |
| Entry price | $49.99/mo | $299/mo |
| Formats & SDKs | REST API, JSON, CSV | REST API, JSON, Python SDK |
| Typical uses | Financial services, Research & academia | AI & LLM apps, Research & academia, Marketing & PR, Financial services |
Alpha Vantage News & Sentiment vs Diffbot: overview
Alpha Vantage News & Sentiment
Alpha Vantage was founded in Boston in 2017 by Olivier Porte and Steve Zheng and went through Y Combinator's Summer 2018 batch. Its NEWS_SENTIMENT function returns market news with an overall sentiment score plus per-ticker and per-topic scores, from the same key that serves prices, fundamentals and technical indicators. Many hobby trading projects start here because the free key arrives instantly. Third-party guides describe the free allowance as 25 requests a day at five a minute, and premium plans as starting at $49.99 a month for 75 requests a minute with no daily cap. Commercial use is a separate question, and one source reports commercial licences in the $499 to $2,499 a month range. Responses carry summaries and links; full articles live on the publishers' sites.
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: Alpha Vantage News & Sentiment vs Diffbot
| Capability | Alpha Vantage News & Sentiment | Diffbot |
|---|---|---|
| Full article text | ✗ | ✓ |
| Historical archive | ✗ | ✓ |
| NLP enrichment | ✓ | ✓ |
| Story/event clustering | ✗ | ✗ |
| Official SDK | ✗ | ✓ |
| Streaming or webhooks | ✗ | ✗ |
| Free access | ✓ | ✓ |
Formats and SDKs: Alpha Vantage News & Sentiment vs Diffbot
| Format / SDK | Alpha Vantage News & Sentiment | Diffbot |
|---|---|---|
| REST API | ✓ | ✓ |
| Python SDK | N/A | ✓ |
| Node.js SDK | N/A | N/A |
| Webhooks | N/A | N/A |
| WebSocket | N/A | N/A |
| MCP server | ✓ | N/A |
| S3/bulk delivery | N/A | N/A |
| BigQuery | N/A | N/A |
Pricing comparison: Alpha Vantage News & Sentiment vs Diffbot
| Criterion | Alpha Vantage News & Sentiment | Diffbot |
|---|---|---|
| Entry price | $49.99/mo | $299/mo |
| Pricing model | Free key; premium plans by rate limit | 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: Alpha Vantage News & Sentiment vs Diffbot
| Dimension | Alpha Vantage News & Sentiment | 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 | Adding a sentiment column to a backtest. Student finance projects. | Monitoring niche trade publications. Clean article text for an LLM from known URLs. |
| How you get access | Free tier | Free tier |
Alpha Vantage News & Sentiment vs Diffbot: pros and cons
| Alpha Vantage News & Sentiment | |
|---|---|
| + | Free key with no approval wait |
| + | Sentiment per ticker and per topic in each response |
| + | Prices and fundamentals on the same account |
| + | Premium tiers are sold by rate limit, which makes scaling simple to price |
| - | 25 free requests a day runs out quickly |
| - | Commercial use may need a separate, much pricier licence |
| - | Summaries and links only, no article text |
| 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 Alpha Vantage News & Sentiment?
A typical fit: adding a sentiment column to a backtest.
Ticker and topic sentiment scores from the same key as market data. Paid access starts at $49.99/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: Alpha Vantage News & Sentiment vs Diffbot
| Your situation | Recommended choice |
|---|---|
| You want to start free before paying | Both |
| Your budget is at the lower end | Alpha Vantage News & Sentiment |
| You need full article text in the response | Diffbot |
| You need years of historical news | Diffbot |
| You want an official SDK | Diffbot |
| You are wiring news into an LLM agent | Both work through plain REST calls |
Use case fit: Alpha Vantage News & Sentiment vs Diffbot
| Use case | Alpha Vantage News & Sentiment 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: Alpha Vantage News & Sentiment vs Diffbot
Alpha Vantage News & Sentiment (3.8/5) is the stronger overall choice as a news data source. Ticker and topic sentiment scores from the same key as market data.
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
Alpha Vantage News & Sentiment vs Diffbot FAQ
Is Alpha Vantage News & Sentiment better than Diffbot?
Alpha Vantage News & Sentiment (3.8/5) scores higher overall, but "better" depends on your use case. Alpha Vantage News & Sentiment's strongest advantage: free key with no approval wait. Diffbot's strongest advantage: no custom scrapers to maintain when a site changes layout.
How do Alpha Vantage News & Sentiment and Diffbot differ in pricing?
Alpha Vantage News & Sentiment: free key; premium plans by rate limit, with paid access from $49.99/mo. Diffbot: monthly credit plans, with paid access from $299/mo. Both offer some free access for testing.
Which is better for enterprise: Alpha Vantage News & Sentiment or Diffbot?
Both sell enterprise contracts. Neither carries licensed publisher content, so check copyright terms before republishing anything.
What are the main differences between Alpha Vantage News & Sentiment and Diffbot?
What sets Alpha Vantage News & Sentiment apart: ticker and topic sentiment scores from the same key as market data. What sets Diffbot apart: parser-free extraction from any article URL, linked to a Knowledge Graph. They also differ on entry price ($49.99/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.