VOL. XCIV, NO. 247
★ BEST INVESTING TOOLS COMPARISON ★
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Sunday, May 31, 2026
Tool Comparison · Sunday, May 31, 2026
Open Payments (CMS) vs SEC API (sec-api.io)
Open Payments (CMS) vs SEC API (sec-api.io): which investing tool fits your workflow? Compare pricing, features, platforms, and verdict in seconds.
Open Payments (CMS)
openpaymentsdata.cms.gov
Best for data visualizations, and official sources
- Pricing
- Free
- Platforms
- Web, API
SEC API (sec-api.io)
Picksec-api.io
Best for insider data, and 13f
- Pricing
- Free • From $55/mo
- Platforms
- Web, API
Outbound links may include affiliate or sponsor codes.
Comparison snapshot
Who should choose which?
Choose
Open Payments (CMS) if…
- You need three core datasets each year: general payments, research payments, and ownership/investment interests.
- You need web search/explorer with filtering and charts; program year downloads available from the portal.
- You need open data api (oda) for programmatic access with filtering, querying, and aggregation (soql‑style).
- You need publication cadence: initial annual publication on/around june 30 for the prior year, plus refresh publication after the calendar-year-end review/re-attestation cycle.
Choose
SEC API (sec-api.io) if…
- You need real-time data, not delayed quotes
- You need comprehensive api endpoints: query, full-text search, real-time streaming via websocket, download/pdf generator, xbrl-to-json conversion, and section extractors for 10-k/10-q/8-k filings.
- You need specialized form coverage including adv, insider filings (forms 3/4/5), 13f, 13d/g, form 144, ipo registrations (s-1, 424b4), crowdfunding (form c, form d), reg a filings, and fund reports (n-port, n-px, n-cen).
- You need datasets include executive compensation, directors and board members, audit fees, subsidiaries, and public float/outstanding shares.
Consider alternatives if…
- You want broader category coverage in one tool.
- Neither pricing tier fits your budget.
Side-by-side feature breakdown
| Attribute | Open Payments (CMS) | SEC API (sec-api.io) |
|---|---|---|
Asset types | Other | StocksETFsMutual FundsFunds |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Regions | North America | North America |
Data freshness | End of Day | Real-time |
API access | REST | RESTWebSocket |
Export formats | CSVJSON | JSONPDF |
Seen enough? Open either tool and try it now.
Pricing breakdown
Tool
Open Payments (CMS)
—
Starting price
Plans & pricing
Tool
SEC API (sec-api.io)
$55/mo
Starting price
Plans & pricing
Coverage overlap
Categories where both tools offer overlapping coverage.
Categories covered by Open Payments (CMS) only.
Categories covered by SEC API (sec-api.io) only.
Community category leaders
Vote sentiment comparison
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Still deciding? Get hands-on with both — most plans offer a free tier or trial.
Frequently Asked Questions
What's the difference between Open Payments (CMS) and SEC API (sec-api.io)?
Open Payments (CMS) focuses on Data APIs, APIs & SDKs, and Data Visualizations while SEC API (sec-api.io) specializes in Data APIs, Regulatory Filings Monitoring, and Insider Data. They overlap in 3 categories, so choose based on your preferred workflow and pricing.
How much do Open Payments (CMS) and SEC API (sec-api.io) cost?
Good news—both Open Payments (CMS) and SEC API (sec-api.io) offer free plans. You can try each platform without commitment and only pay when you need premium features.
Do Open Payments (CMS) and SEC API (sec-api.io) have APIs?
Yes, both platforms offer API access for developers and quants who want to build custom integrations or automate their workflows.
Should I choose Open Payments (CMS) or SEC API (sec-api.io)?
Choose Open Payments (CMS) if you need Three core datasets each year: General Payments, Research Payments, and Ownership/Investment Interests., and Web search/explorer with filtering and charts; program year downloads available from the portal.. Go with SEC API (sec-api.io) if Comprehensive API endpoints: query, full-text search, real-time streaming via WebSocket, download/PDF generator, XBRL-to-JSON conversion, and section extractors for 10-K/10-Q/8-K filings., and Specialized form coverage including ADV, insider filings (Forms 3/4/5), 13F, 13D/G, Form 144, IPO registrations (S-1, 424B4), crowdfunding (Form C, Form D), Reg A filings, and fund reports (N-PORT, N-PX, N-CEN). better fits how you invest.
What asset classes do Open Payments (CMS) and SEC API (sec-api.io) cover?
Both cover common asset types. Open Payments (CMS) also includes Other. SEC API (sec-api.io) adds coverage for Stocks, ETFs, Mutual Funds, and Funds.
Does Open Payments (CMS) or SEC API (sec-api.io) have real-time data?
SEC API (sec-api.io) offers real-time data feeds, which is essential for active traders. Open Payments (CMS) uses delayed or end-of-day data, which works fine for longer-term investors who don't need up-to-the-second quotes.
Can I export data from Open Payments (CMS) and SEC API (sec-api.io)?
Open Payments (CMS) supports data exports to CSV, and JSON. SEC API (sec-api.io) has more limited export options.
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Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.