★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Source check: EMMA checked July 18, 2026
Tool Comparison
EMMA vs Open Payments (CMS)
Pick EMMA if
EMMA
Free · Web
- Delayed quotes won't cut it; you need real-time data
- You care about new issues & calendars, credit ratings & outlooks, and alerts, things Open Payments (CMS) doesn't offer
Pick Open Payments (CMS) if
Open Payments (CMS)
Free · Web · API
- You want an API so you can script or automate things
- You care about APIs & data feeds, something EMMA doesn't offer
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
EMMA and Open Payments (CMS) cover a lot of the same ground (3 shared categories, regulatory filings monitoring, data visualizations, and official sources), so for the basics you won't go far wrong with either. The real difference is focus: only EMMA gives you new issues & calendars and credit ratings & outlooks, and only Open Payments (CMS) gives you APIs & data feeds.
What readers say
EMMA
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Open Payments (CMS)
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Key differences at a glance
- Real-time data
- EMMA
- API access
- Open Payments (CMS)
- Free plan
- Both
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free | Free |
Free tier | Yes | Yes |
Free trial | — | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | No | Yes |
| Audience & fit | ||
Experience level | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | Retail Traders, Analysts +3 more | — |
Categories covered | 6 | 4 |
Regions | North America | North America |
| Data & capabilities | ||
Data quality | Latency: Real-time | Latency: End of Day and Granularity: EOD |
Security | — | Data residency: US |
| Try it | Visit EMMA | Visit Open Payments (CMS) |
Where each one shines
What EMMA and Open Payments (CMS) each do best.ShowHide
Where each one shines
What EMMA and Open Payments (CMS) each do best.What EMMA does best
- Search municipal securities by identifier or name and review security and issuer information.
- Disseminated real-time trade prices and a price-discovery tool for comparing similar municipal securities.
- Official statements, continuing disclosure documents, credit ratings, and issuer homepages.
- New-issue calendar, recently sold issues, market statistics, and continuing-disclosure trends.
- Free MyEMMA profiles and alerts for selected securities.
What Open Payments (CMS) does best
- Search tools across official Sunshine Act records for payments and ownership interests reported by drug manufacturers, device manufacturers, and group purchasing organizations.
- Comparison tools for General Payments, Research Payments, and Ownership or Investment Interests across program years.
- Lookup tools for physicians, non-physician practitioners, teaching hospitals, manufacturers, products, payment categories, dates, and dollar amounts from the public web tool.
- Charts, filters, and downloadable tables to move from a provider, company, or product question into the underlying records.
- Download support for bulk datasets when healthcare, pharma, medtech, policy, or compliance workflows need repeatable offline analysis.
Every detail we compared
Every tracked attribute for EMMA and Open Payments (CMS), side by side.ShowHide
Every detail we compared
Every tracked attribute for EMMA and Open Payments (CMS), side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | Bonds | Other |
Experience | BeginnerIntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Retail TradersAnalystsInstitutional InvestorsFinancial AdvisorsStudents/Researchers | Not specified |
Regions | North America | North America |
Coverage details | Countries: USIdentifiers: CUSIP | Countries: US |
| Data | ||
Data freshness | Real-time | End of Day |
Data granularity | Not specified | EOD |
| Access & integrations | ||
API protocols | Not specified | REST |
API auth & delivery | Not specified | Auth: None |
Export formats | Not specified | CSVJSON |
| Plans & trust | ||
Security & compliance | Not specified | Data residency: US |
Vendor & support | Municipal Securities Rulemaking Board (MSRB)Country: USSupport: Email and Phone | Centers for Medicare & Medicaid Services (CMS), U.S. Department of Health & Human ServicesCountry: USSupport: Email and Phone |
Curation ratings | Not specified | Methodology 5/5Reliability 5/5UX 4/5 |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | Free“Public EMMA access” | Free |
Questions we keep getting
What's the difference between EMMA and Open Payments (CMS)?
EMMA leans toward new issues & calendars, credit ratings & outlooks, and regulatory filings monitoring, while Open Payments (CMS) puts more weight on APIs & data feeds, data visualizations, and regulatory filings monitoring. They overlap in 3 categories, so for most people it comes down to workflow preference and price.
How much do EMMA and Open Payments (CMS) cost?
Good news: both EMMA and Open Payments (CMS) have free plans, so you can run them side by side and only pay if you hit a wall.
Does EMMA or Open Payments (CMS) have an API?
Open Payments (CMS) has an API for programmatic access and custom integrations. EMMA doesn't, so you're working through its interface.
Should I choose EMMA or Open Payments (CMS)?
It depends on what you're after. Pick EMMA if new issues & calendars and credit ratings & outlooks matter to you; go with Open Payments (CMS) if you'd rather have APIs & data feeds. And if you only need the basics both share, let price decide.
What asset classes do EMMA and Open Payments (CMS) cover?
EMMA covers bonds. Open Payments (CMS) covers other.
Does EMMA or Open Payments (CMS) have real-time data?
EMMA offers real-time data, which matters if you trade actively. Open Payments (CMS) runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Can I export data from EMMA and Open Payments (CMS)?
Open Payments (CMS) exports to CSV. EMMA is stingier about getting data out.
Keep researching
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Feedback
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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.